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BOLETIM DA FACULDADE DE CIÊNCIAS AGRÁRIAS DO PARÁ. n. 28, jul./dez. 1997.

2026-03-27T15:48:44Z

Título: BOLETIM DA FACULDADE DE CIÊNCIAS AGRÁRIAS DO PARÁ. n. 28, jul./dez. 1997.; 1) Análise da vegetação de regeneração natural na floresta tropical úmida em Paragominas-Pa.; 2) Crescimento e sobrevivência de mudas de pau-rosa (Aniba rosaeodora Ducke) oriundas de três procedências, em função de diferentes níveis de sombreamento, em condições de viveiro.; 3) Estrutura e sucessão em florestas secundárias no município de Benevides-Pará.; 4) Indução do enraizamento de estacas de tachi branco (Sclerolobium paniculatum Vogel), através da aplicação de diferentes concentrações de ácido indol-3-butírico.; 5) Influência de práticas agrícolas na incidência de ervas invasoras no cultivo de plantas alimentares em Santo Antônio do Tauá, PA.; 6) Influência do espaçamento nas propriedades mecânicas da madeira de tatajuba (Bagassa guianensis Aubl.) no planalto de Belterra, PA.; 7) Intensificação do período seco e seu efeito no fluxo de dióxido de carbono do solo em floresta primária de terra firme no sudeste amazônico.; 8) Matéria seca e concentração de macronutrientes em Pueraria phaseoloides L., com dois a oito anos de idade, nas condições de plantações industriais de dendezeiro em latossolo amarelo, Tailândia - Pará.; 9) Processos fenológicos de Hevea brasiliensis M. arg. e Sapium curupita Hub. em ecossistemas florestais de várzea na ilha do Pará, município de Afuá, no Estado do Pará.; 10) Umidade residual em função do uso de um latossolo da microrregião de Castanhal-PA. Autor(es): SANTANA, José Augusto da Silva; BARROS, Lucyana Pereira; JARDIM, Fernando Cristovam da Silva; ROSA, Leonilde dos Santos; SÁ, Taliana Deane de Abreu; OHASHI, Selma Toyoko; BARROS, Paulo Luiz Contente de; SILVA, André José Vieira; ARAÚJO, Maristela Machado; OLIVEIRA, Francisco de Assis; MARTINS, Paulo Fernando da S.; OHASHI, Orlando Shigueo; CARDOSO, Antonio; FERREIRA, Solange F. M.; CARVALHO, Manoel Sebastião Pereira de; CARVALHO, João Olegário Pereira de; CATTÃNIO, José Henrique; NEPSTAD, Daniel Curtis; DAVIDSON, Eric; VERCHOT, Louis V.; ACKERMAN, Ilse; PÉREZ, Nilda Leonor Pezo; VIÉGAS, Ismael de Jesus Mattos; FREITAS, João da Luz; FERREIRA, Cícero Paulo; DIAS, Antonio Carlos da Costa P. Abstract: 1) The objective ofthis work was to study the floristic composition, aggregation and the structure of natural regeneration of a forest, in a plot measuring 500m x 20m (lha), subdivided in 100 subplots of lOm x lOm, placed in Cauaxi Farm, at Paragominas-Pa. The plot was located in the center of stand V which is being used by the Tropical Forest Foundation (TFF) to accomplish research works on low impact forest logging and management, with 100 ha and it works as a plot of permanent preservation. In the subplots were identified, measured and whole maped the plants with DBH lOcm. In 10 of those subplots were classified, measured and mapped ali the individuais 5,1 and 9,9cm DBH, and settled 50 microplots measuring 4 m2 (2m x 2m), in which were enumerated and classified whole the plants with less than 5cm DBH, which were considered as natural regeneration. The floristic composition of the plot inventoried was formed by 34 botanical families, 58 genera, 75 species and 1.055 individuais, of which 569 were trees, 295 were lianas, 182 were bushes and 9 were palm trees. The families better represented in the area was Maranthaceae (120 plants), Mimosaceae (113 plants), Bignoniaceae and Caesalpiniaceae (107 plants), and Sapotaceae (102 plants), accounting for about 52% of the whole population. The species better distributed were Arrahidae agensis (97 plants), Rinorea guianensis (93 plants), Bauhinia splendens (87 plants), Pouteria guianensis and Salada insignis (70 plants), Calaihea capilata (69 plants) and Inga edulis (68 plants), representing 52% ofthe individuais' total. The percentile of species with less than 4 individuals/ha were of 40%. The values of the homogeneity degree and of the Jentsch" mixture quotient evidenced a vegetable community with high heterogeneity. The Mc Guiness' index revealed a larger number of species with tendency to the grouping, while the Fracker' & Brischle' index showed a larger amount of grouping species.; 2) The aim of this study was to evaluate the initial behavior of Aniba rosaeodora Ducke (rosewood), under different shading conditions. Seedlings of rosewood from natural regeneration were kept in shade houses instaled in nursery conditions, at 0%, 30% , 50%, 70% of shading, during ten months. The experiment design was carried out in a randomized completblock, in split-plot, with three replicates, where the shading conditions were the principal factor and the three provenances of rosewood (Manicoré, Floresta Nacional do Tapajós-FLONA and Curuá-Una) were the secondary factor. It was found that the growth (stem height, diameter, leafarea, numberof leaves) and biomass allocation patterns, varied sensibly in response to shading. This specie showed superior growth at 50% of shading, in relation to anothers shade conditions. On the other hand, the survival decreased with increasing in light intensity. Under 0% of shading, for example, the survival was 65,2% for seedling from Manicoré, 62,1% for FLONA and 55,6% for Curuá-Una. These preliminary results indicated that during the juvenile phase, the ^4. rosaeodora, showed caracteristics of tolerant specie.; 3) This paper presents an structural analysis ofsecondary successions on fallows of 6 years old after clear out and 17 and 30 years old after wood selective harvesting, at CEPLACs Experimenta! Station 17 km near Belem, Pará, Brazil. The vegetation lOcm height and above were sampled by three plot sizes; I) Plots 20mx50m, with subplots 10mx20m, where plants 20cm dbh and more were measured; II) Four plots lOmxlOm size, in each 20mx50m plots, where plants ffom 5cm to 20cm dbh were measured; and III) Plots 2mx2m, in each 1 Omx1 Om plots, where plants 1 Ocm height and up to 5cm dbh were counted on three size classes. The structure of ecosystems was analysed according to IV1A (Amplified Importance Value Index) that shows horizontal and vertical forest aspects. In 6 years fallow, with 42 species, the only individual more than 20cm dbh belonging to Schizolobium amazonicum produced a hight IVIA, even without natural regeneration. The 17 years fallow was 65 species rich, 5 of which are more than 20cm dbh and prevail over in terms of IVIA, with 83%. Between 6 and 17 years fallows there were 24 species, that account for 13,2% and 78,7% of IVIA, respectively. The 30 years fallow is 67 species rich, 27 of which are 20cm dbh and more, standing ontPouwuma cecropiaefolia for 16,9% in terms of IVIA. Comparing 6 and 30 years fallows shows that 20 species were in beginning of succession. The 17 and 30 years fallows shows 42 species in common. There was a great floristic variation among 6 and 30years fallows, increasing according to age. The 6 years secondary forest is still developing on the contrary on 30 years one that showed trails iike a mature forest.; 4) The effect of indole-3-butyric acid (IBA) on the rooting of Tachi-branco (Sclerolobiumpaniculatum Vogel) cuttings was investigated. Tachi is a tree of the family Caesalpinaceae, found in Peru, Suriname, region North, Northeast and Central of Brazil. The Tachi branco's timber is used to fuelwood and building. Cuttings were taking from seedlings of Tachi, with approximately 70 cm of height. Cutting length was standardized to 10 cm, two leaflets with per cutting. After to trimming their leaf area to approximately 50%, the cuttings were treated immediately with four indole-3-butyric acid concentrations: 0% (only ethanol), 2.000 ppm, 4.000 ppm e 6.000 ppm. A total of 200 cuttings, were randomly arranged 5 plots and 4 treatments. It was found that the treatments containing indole-3-butyric acid, estimulated adventitious rooting formation, accelerate the rooting and increase the number of cuttings rooted in stem cuttings of Tachi branco. These result indicated that propagation of Sclerolobium paniculatum, by stem cuttings take from juvenile material, is technically viable, if the cuttings were treated with 4.000 ppm of IBA.; 5) This paper evaluates the incidence of weeds in the sequence rice-corn-cowpea as affected by fertilization and methods of weed control. The study was performed in the county of Santo Antonio do Tauá, Pará state, on médium textured Latosol soil (oxisol). The climat is Ami under Kõppen classification. The experimental design was inrandomized blocks with four replications and a split plot arrangement oftreatments. The main plots evaluated three weed control methods: a) two weed cutting by hoe in each crop; b) mulch at 5 ton/ha; c) one application of herbicide for crop. In the sub-plots three fertilization conditions were tested: a - no fertilzer; b - composted manure; c - NPK fertilizer. The weed control was evaluated by total dry matter in an area of 0,5 m2 and the dry matter production ofthe four predominam weed species. The results showed that weed control methods have a similar effects on the weeds total dry matter, production but different effects on the weed species. The cutting by hoe stimulated the growth oíDigitaria sp, the mulching stimulated the growth of Commelina sp. and de Propanil herbicide the developpement ofthe Eragostis sp. Manuring and NPK fertilizer increased the weed incidence as compared with no fertilizers treatment and affected the growth ofthe weed species. Manure increased the growth ofEleusine sp. and the NPK fertilizer the growth ofDigitaria sp.; 6) The largest part ofthe Brazilian forest resources are in the Amazon Region, which cover about 260 million hectares. More than 90% of this area is covered by terrafirme and várzea forests, with a very rich occurrence of timber species. As the heterogeneity is a strong feature of tropical regions, the timber species in these forests have wood with great variability on their properties. These properties vary within the same species, according to its natural habitat, or site where it was introduced, and other factors as for example genetics and silviculture, among others. Therefore, its is necessary to know better the wood properties in relation to silviculture, mainly for commercial species and for those with potential characteristics for future marketing. Some native species have been planted because they present a fast growth rate, but few information about wood properties and its relation to silvicultural system or silvicultural method of planting are available. In order to contribute to improve information on interation between wood properties and silviculture, this work had as main objective to study the mechanical wood properties ofBagassa guianensis Aubl. in four spacement, in a sixteen-year-old plantation of 5.75 ha at CPATU Experimental Station in Belterra, Para State. Considering the various uses of Bagassa guianensis, from buildings to shipping and fumiture, the results of this work showed that the species can be planted in different spacing, according with its proposed final use. For example, to obtain wood for building it is suggested to plant in spacing of4m x 4m, and for producing veneer and fumiture the suggestion is to plant in smaller spacements (2m x 3m or 3m x 3m).; 7) General Circulation ModePs (GCM's) show for the next decade an increase in green house gases concentration as well as for the global warming, between 1.5 a 4.5 °C, with on likelihood decreasing of rain on the Amazon ecosystems. Considering this tendency, this work had the objective to evaluate the effect of water stress intensification, on dry season, through of treatments for restriction of rain, on C02 production from soil of primary forest of upland, Two statistic designs are utilised, to make a descriptive analysis between one plot lOm x 10 m, that to be received a treatment of restriction of rainfall for 4 year compared to a control, descriptive design; and ANOVA analysis in five blocks (block design) with three treatment of moisture: 100, 50 e 0% of rain exclusion, on a primary forest in Paragominas {2o59' S, 4703 TW), State of Pará. The soil moisture was measured with time domain reflectometry (TDR) and the gavimetric method, the month measurement of soil C02 fluxes was to make in the field through of air circulation between static soil chamber and a infrared gas analyser-(LiCor). The results revealed an increase of dead roots mass, decrease in root growth and soil C02 flux will decrease of soil moisture. Through of this evidence, we can suggest that a decrease of soil moisture in Paragominas primary forest, will be able in the future to promove the increase on probability of this forest became inflammable and therefor an increase on CO, flux in the atmosphere.; 8) An experiment was conducted at Companhia Real Agroindustrial, Tailândia, Pará State, in yellow latosol, to determine the dry matter production and concentration of macronutrients of Pueraria phaseoloides L., according to its age in palm oi! plantation, The experiment design was a randomized with four replicates. The results showed that the dry matter production decreased throughout the years, in a progressive order. The concentrations ofN, P, Ca, Mg and S in Pueraria phaseoloides varied with age. The variation in K concentration was observed only in the green tissue. The concentration of N, P and K were higher in the green tissue, where as the Ca, Mg and S concentrations were higher in the dead tissue. The sequence of prevalent levei was N > K > Ca > Mg > P > S, in the green tissue.In the dead tissue the sequence was: N > Ca > Mg > K > S > P.; 9) We study phenological processes of Hevea brasiliensis M. Arg and Sapium curupita Hub in the flood plain of Amazon river at Para Island, Afua, Para (0o 3'S, 51° 10' W) based on the phenophases of flowering, fruiting, dissemination and leaf fali of six ideotypes of each specie. The tree species subpopulations (N=12) was selected in transect of 10 m x 2000 m (2 ha) and monitored for 15 months. The H brasiliensis showed flowering phenophase in the dry season lasting three months with peak in July showing an annual pattem. The S curupita started flowering in the end of dry season lasting until the beginning of wet season lasting two months with peak in February with dissemination phase in March and April. Both species showed leaf fali deciduous pattem.; 10) The objective of this research was to evaluate the residual soil moisture content ofa red yellow Latosol under two different soil uses. secundary native forest and a cultivated area. In each area it were collected soil simples, in each soil depths of 0-20, 20-40,40-60, 60-80 e de 80-100 cm, for particle-size analysis, bulk density, soil porosity and water retention capacity. In four selected periods (april, july, november/1996 and january/1997) and in each area it were collected soil simples for soil moisture content. The cultivated treatment was that presented the least values of residual soil moisture content in relation to the secundary native forest in every selected periods. The difference of soil moisture content between the two soil uses was statistically significam according to the t test. This fact means that there was effect ofsoil use in amount ofwater retention of the two soils.

BOLETIM DA FACULDADE DE CIÊNCIAS AGRÁRIAS DO PARÁ. n.27, jan/jun. 1997

2024-04-24T19:48:11Z

Título: BOLETIM DA FACULDADE DE CIÊNCIAS AGRÁRIAS DO PARÁ. n.27, jan/jun. 1997; 1-Capacidade de troca de cátions de dois solos da estação experimental da CEPLAC em Santa Inês-MA.; 2-Colonização de fungos micorrízicos vesicular-arbusculares em raízes de taxi branco (sclerolobium paniculatum vogel).; 3-Concentração de N, P, K, Ca, Mg e S em plantas de malva (urena lobato l), cultivar br-01, cultivadas em solução nutritiva com omissão de macro e micronutrientes.; 4-Crescimento de mudas de taxi branco da terra firme (sclerolobium paniculatum vogel) micorrizadas e adubadas com diferentes fontes de fosfato natural em casa de vegetação.; 5-Deficiências nutricionais de Quicuio da Amazônia (brachiaria Humidicola (rendle) schweickerdt) em um plintossolo da Ilha de Marajó, Estado do Pará.; 6-Efeito da aplicação de calcário e de doses de enxofre sobre propriedades químicas do solo, produção e composição mineral do sorgo (sorghum bicolor (L) moench).; 7-Fluxo de liteira e teores de nutrientes de eucalipto (eucalyptus citriodora hook.) em um ecossistema da Amazônia Oriental.; 8-Níveis de açúcares e atividade de invertases em cana-de-açúcar (saccharum spp). II. cultivares sp70-1143 e sp71-799.; 9-Occurrence of vesicular-arbuscular mycorrhizal fungi in Rosewood (Aniba rosaeodora Ducke).; 10-Produção de lixeira e teores de nutrientes de tatapiririca (Tapirira guianensis aubl.) em um ecossistema da Amazônia Oriental.; 11-Teores de enxofre de um latossolo amarelo, após manejos tradicionais de capoeira sem adubação. Autor(es): SOARES, Jorge Luis Nascimento; DIAS, Antônio Carlos da C. P.; PEREIRA, Gilberto Carvalho; OLIVEIRA JÚNIOR, Valter Mendes de; SANTOS, Maria Marly Lourdes Silva dos; FARO, Mara Patrícia dos Santos; BEJAMIN, Aldrin Mario da Silva; OLIVEIRA, Williams Dias de; FASABI, Jorge Aquiles; CARVALHO, Janice Guedes de; OLIVEIRA, Wilson José Dias de; MARTINS JÚNIOR, Humberto Beltrão; MORAIS, Francisco Ilton de O.; TEXEIRA NETO, José F.; COUTO, Walmir Sales; VIÉGAS, Ismael de Jesus Matos; VELOSO, Carlos Alberto Costa; FABRICIO, Amoacy Carvalho; DURÃES, Frederico Ozanan Machado; CARVALHO, Eduardo Jorge Maklouf; CORRÊA, Carlos Alberto; OLIVEIRA, Francisco de Assis; DIAS, Antonio Carlos da Costa Pinto; M.S. VIEIRA, Irenice; CROCOMO, Oito J.; OLIVEIRA, Enio T. de; GALLO, Luiz A.; BATISTA, Telma F. C.; RODRIGUES, Rosana C.; SANTANA, José Augusto da Silva; BARROS, Lucyana Pereira; CORRÊA, Carlos Alberto; PARRY, Maurício Môller; MÔLLER, Maria Regina Freire Abstract: 1) The CEC of the soil Sede and Babaçu belonging to the podzolic soil great group, from CEPLAC experimental station in the Santa Inês (Maranhão State), was determined. The methodologies used consisted. 1) Additon of exchangeable cations, known as indired CEC; 2) Soil saturation with monovalente cations known as direct CEC. Despite the fact that both soil series presented a similar mineralogy along the soil horizons, the Babaçu soil serie presented, in average, twice the value of CEC of the soil Sede serie, The direct CEC presented higher values than the indirect CEC.; 2) The inoculation ofmycorrhizal fungi Acaulospora sp, Gigaspora margarita e Scutellospora heterogama (isolated from Brachiaria decumhens) in plant of taxi-branco-da-terra-firme (Sclerohium paniculatum. Vogel) was studied in a glasshouse plastic plot containing 3 kg of yellow latosol fumigated by methyl bromide. A randomized blocks experimental desingn with four replicates per treatment was used. The seeds coilected in EMBRAPA/CPATU/ Belém-PA were sowed in plastic tray, containing washed sand. The sources of natural P used were Pirocaua, Jandiá and Trauíra. Percentage ofroot colonization and spore number were delermined. Plants inoculated with Acaulospora sp and fertilized with Jandiá schowed the higlest percentage of root colonization, followed by Scutellospora heterogama and Gigaspora margarita.; 3) Concentrations of N, P, K, Ca, Mg and S in the shoot and root tissues ofmalva were determined under greenhouse conditions using the missing element technique. A randomized experiment with five replicates and the: complete, omisson ofN, P, K, Ca, Mg, S, B, Cu, Fe, Mn and Zn from a complete solution was used. Tissue harvest was done 60 days after application of the nutrient treatments. Results showed that the nutrients concentration in the diferent plants tissue varied as a function ofthe element omitted from the nutrient solution.; 4) The effects of different sources of natural P and arbuscular mycorrhizal fungi (FMAs) inoculation on the growth of Taxi-branco-da-terrafirme {Sclerolobium paniculatum Vogel) were evaluated under greenhouse conditions at Departamento de Solos, Faculdade de Ciências Agrárias do Pará- FCAP, Belém, Pará state, Brazil, in 1995. The experiment was carried out in 3 Kg plastic pot, containing sieved yellow alie latosol, fumigated with methyl bromide, under randomized blocks design with four replicales per tratment. The seeds collected in Embrapa/Cpatu-Belém/ PA were sowed in plastic tray, containing washed sand. The sources of natural P used were Pirocaua, Jandia and Trauíra.Three FMAs Acaulospora sp, Gigaspora margarita and Scutellospora heterogama which were previously multipiied in culture pot, containing Brachiaria decumbens as host plant. Inoculation was done at transplanting by depositing approximately 20g of soil inoculum, containing 206, 430 and 1904 spores, respectively, undereath the seedlings. The different sources of namral P demonstrated different effects on mycorrhizal root infection, Plants inoculated with Acaulospora sp and fertilized with Jandia showed the higlest percentage of root colonization, followed by Scutellospora heterogama and Gigaspora margarita. More study should be done to obtain the satisfactory crop produetion with reduced fertilization cost, by using FMAs in low fertility soil of Amazon.; 5) The missing element technique was used to determine nutrient deficiencies of the introduced pasture quicuio da amazônia {Brachiaria humidicola (Rendle) Schweickerdt) grown in greenhouse conditions on a piinthic soil ofthe Marajó island. The experimental design was a randomized experiment, with three replicates. Results showed that fertilizers application increased (a < 0,01) the top and root production ofthis grass specie. P was the principal nutrient which limited top growth of quicuio, followed by Mo, S, Ca and N. Liming also improved growth ofquicuio da amazônia. The quicuio da Amazônia root growth was limited by Zn, Mo, P, Ca.; 6) The effects ofliming and sulphur leveis on the chemical properties ofthe soil, dry matter production and nutrients accumulation on tops of sorghum cultivated on a Red Yellow (YRL) and Dark Red (DRL) latosol were determined by means of laboratory incubation and greenhouse pot trial. Soil samples were incubated with lime for 25 days, to which six dosis of sulphur (source: Na,S04) 0; 10; 20; 40; 80 and 160 mg/dm3. Fifty days after sowing, plants shoots were harvested and N, P, K, Ca, Mg and S contents were determined. Exchangeable cations and base saturation (V%) ofthe soils increased after liming, The pH, Ca and Mg contents of the plant shoots increased with the addition of CaO and MgO. The dry matter yield of sorghum was higher in plants cultivated on YRL than in DRL. Increasing sulphur concentration did not show any effect on nutrient contents of plant shoots in both soils.; 7) The litter production and nutrients supply of an Eucalyptus citriodora Hook pure stand were estimated at the Barcarena region of Pará State. The predominam soil site is an Yellow Latosol and the climate is classified as Afí according to Kõppen classification. The results showed that the litterfall reached values of 2.643,60 kg.ha-the leaf litter contributed with 3.698,10 of such total. The nutrients retum in kg.ha"1 were: 18,18 ofN; 0,52 of P;5,60of K; 29,50 of Ca and 3,15 of Mg.; 8) An important role is played by invertase isoenzymes in sugar metabolism, as part of the source-sink system in sugarcane, contributing to the physiological and agronomic behavior of the different cultivars. To test this, cvs. SP70-1143 and SP71-799 were cultivated in the field, Samples of leaves (blades and sheats) and stalks were harvested in time intervals between the 5th and the 7th month of growth. Total soluble protein, reducing and total soluble sugars were analysed and sucrose has been estimated. Determination of the activity ofthe following invertase isoenzymes: acidic (pH 5.5), neutral (pH 7.0), cell wall-linked (pH 2.2, 3.5 and 3.8) weere carried out. Cv. SP7I-799 showed higher leveis of sucrose than cv. SP70-1143, presenting low leveis of reducing sugars in the stalks intemodes. In both cultivars, the tissues of leaf blade and sheats and of the stalk intemodes have two soluble invertase isoenzyines, one acidic pH5.5 and one neutralpH 7.0, as well as an cell wall linked acidic isoenzyme; each one of lhese isoforms bears an optimum pH value. Cv. SP70- 1143 have relatively high leveis of sucrose in the stalks and high activity of acidic invertase in the leaves.; 9) Extractivism of the species {Aniba rosaeodora) once was very importam in the economy of the Amazon Region, however the intense pressure ofharvesting decreased considerably the population of the species. Plantation in agroforestry systems or reforestation is one altemative continuously to provide raw material but rosewood has showed slow growth rates. The utilization of mycorrhiza to produce seedlings in the norsery should contribute to increased rate of growth and survival. Roots of nursey seedlings of regenerants collected under the crown of trees in the forest and ffom mature trees were collected and analized with the objective to determine the occurrence of the Vesicular Arbuscular Mycorrhizal Fungi and the degree of infection. Soil samples near the roots were analized to quantitify and identify the spores. Ali root samples examined showed inter- and intracellulary hyphae, and arbuscles. In soil samples spores from eight differents species of the Vesicular-Arbuscular Mycorrhizal Fungi genera, Acaulospora, Glomus and Scutellospora, were found.; 10) It was determined the litterfall and nutrient content in a Tapirira guianensis forest, pure stand, for 12 months at the Barcarena region, Pará (Io 30' S, 48° 42' W). The predominam soil isan Yellow Latosoland the climate Afi according to Koppen classification. The spacing was 1.5 x 1.5m. The results of litterfall reached values of 4.828,60 kg.ha4 and nutrients leveis in kg.ha'1 were: 42,57 for N; 1,05 for PCkt; 9,35 for K+; 93,61 for Ca++ and 12,93 for Mg++. The leaf contributed with 3.698,10 kg.ha4 to the total litterfall.; 11) The sulphur dynamics of a Yellow Latosol in four managed secondary forest ecosystems in Igarapé-Açu, State of Pará was studied. The mangemenl systems were; a) buming of the secondary forest; b) mulching; c) biomass trituration of the secondary forest and incorporation to the soil; and d) secondary forest as the control plot. Soil samplings were collected during the culture cycle at four differents dephs and time. The pH and S leveis of the soils samples were determined in laboratory an increase in the S levei of the soil immediatelly after burning wich was lost by leaching. Biomass incorporation imobilized the S of the soil. Mulching decreased the losses of S by leaching but showed down the S mineralization. The control plot showed down the S mineralization. The control plot showed declining leveis of sulfur throught the research period.

BOLETIM DA FACULDADE DE CIÊNCIAS AGRÁRIAS DO PARÁ. n. 24, jul/dez. 1995

2024-04-24T17:44:25Z

Título: BOLETIM DA FACULDADE DE CIÊNCIAS AGRÁRIAS DO PARÁ. n. 24, jul/dez. 1995; 1- Dinâmica da vegetação arbórea com dap menor que 5,0cm na estação experimetal de silvicultura tropical do INPA, Manaus-AM.; 2-Efeito terapêutico à base de iodo em infecções do sistema genital de fêmeas bubalinas criadas nas condições climáticas do trópico úmido do baixo amazonas, estado do Pará; 3-Retenção de água em latossolo amarelo sob capoeira e cultivo intensivo; 4-Níveis de açucares e atividade de invertases em cana-de-açucar (Saccharum offtcinarum). I. Cultivares NA56-79 e CB41-76; 5-Capacidade de adsorção de fósforo em latossolo amarelo e podzólico vermelho-amarelo da Amazônia Oriental; 6-Prevalência de microfilárias de Dirofilaria immitis em cães (Canis familiaris) na cidade de Belém-PA; 7-Piometra associada a adenocarcinoma ovariano papilífero em cadela - relato de caso Autor(es): JARDIM, Fernando Cristóvam da Silva; SOUZA, Agostinho Lopes de; BARROS, Nairan Félix de; SILVA, Alexandre Francisco da; MACHADO, Carlos Cardoso; SILVA, Elias; RIBEIRO, Haroldo Francisco Lobato; CAMELO, Antonio Sérgio Alves; VALE, William Gomes; CASTRO, Cleómenes Barbosa de; DIAS, Antonio Carlos da C. Pinto; CHAVES, Rui de Souza; VIEIRA, Irenice M. S.; CROCOMO, Otto J.; BATISTA, Telma F. C.; RODRIGUES, Rosana C.; BRASIL, Edilson Carvalho; MURAOKA, Takashi; SOUZA, Nazaré Fonseca de; BENIGNO, Raimundo Nonato Moraes; FIGUEIREDO, Márcia Janete de F. Mesquita de; SALIM, Sinerey Karla da Costa; SILVA, Débora Santos; GONÇALVES, Rosalinda Farias; PEREIRA, Washington Luiz Assunção; SANTOS, Adria Vanessa Linhares dos; SARDINHA, Ana Silvia Andrade Abstract: 1) This paper presents ar. analysis of tree species dynamic behavior comprising plants íarger than l0cm height and smaller than 5cin DBH, in aterra firme equatorial forest, near Manaus (Brazil), under four refinement intensities by canopy tree girdling. Species behavior was evaluated on natural regeneration rate basis by size classes into function and ecophysiological groups stated previously. Ecophysiological group were ratfied by different values of natural regeneration rate, that indicated treatment efftciency to diminish non comercial species populations, notwithstanding shade tolerant spectes group haven't decreased their recovery potential even under havier treatment. Moreover, this group accounts for non comercial function group dynamic. Listed species function group was helped both in terms of germination and in terms of growth. Although great variability in natural regeneration rate, ascribed to ample gradient of light demand, the species of this function group showed clear straight relationship between natural regeneration rate and treatment intensistes.; 2) Intrauterine effect of 50ml iodenfex solution 3% on the fertility dairy cross buffaloes were investigated if field conditions. 75 females with age beetwen four and twenty three years and showing a period of infertility varied from three at fourty eight month, were separated in to two group mainly. The treated group with thiny eight cows and the control group with thirty seven animais. The rate of conception in the first sevice, at the 120 days, the rate ofwhole pregnancy and the treatmente interval/pregnancy were 39,4%, 23,6%, 86,8% and 87 days in to treated group and 24,3%, 24,3%, 54,1% and 120 days in to control group respectively. Therefore the use of iodenfex 3% solution in the treatment of buffaloes with cronic genital infection, was effective to re-establish their reprodutive eficiency. The results were significative for group treated (P<0,05) independently of studied parameter.; 3) This research has as objective to evaluate the effect of two types of soil management - brushwood and intensive cultivation (orchard) - over a yellow-latosol of the Amazônia, 16 handoraized soil simples were colected within cach area in the 0-10, 10-20, 20-30 and 30-40 cm of soil depht. The physical and hidric soil properties measured were: soil texture, bulk density, macroporosity, microporosity, and soil water retention in the 0,1, 0,33,1,00, 3,0, 5,0, 10,0 and 15,6 atmosphere tensions. The results points out that orchard (pomar) treatment caused a significam statistical increased (95% probability of the soil mass up to 20cm of the soil depht in relation to brushwood (capoeira) treatment. The available water determined between 0,1 atm (field capacity) and 15,0 atm (wilting point). The studied soil presents a wilting point at the levei of 5,0 atm because above this tension value there is no available water. The orchard relation to the brushwood treatment up to 0,33 atm. The available water value were classifield as moderate to high.; 4) Sugarcane cultivars NA56-79 and CB41 -76 were used to evaluate the activity of the isoforms oj acidic (pH 5,5), neutral (pH 7.0) and cell wall (pH 2.2, 3.5 and 3.8) invertases, pertaining to their functions in the control of distribution and utilization of sucrose and reducing sugars in plants maintained in the fteld. Samples of leaves (blade and sheat) and stalks were harvested im time intervals between the 5th and 7th months ofgrowth. in the different tissues teo soluble isoenzymes were detected, one acidic pH 5.5 and one neutral pH 7.0, besides one cell wall-linked invertase. The lowest levei of sucrose and high acidic invertase were observed in leaves of cv. CB41-76, while high leveis of sucrose and neutral invertase were detected in the stalks ofcv. NA56-79. Conceming sucrose leveis, the differences between both cultivars can be found in the leaf sheat not in the blade, wich could be due to the high efftciency of sucrose migration from the blade to the sheat and the low efficiency of its rnigration from the sheat to the stalks internodes in cv. CB41-76, while cv. NA56-79 an inverse situation occurs.; 5) Aiming to evaluate the phosphorus adsorption characteristics in soils samples from Oriental Amazonian, was camed out a laboratorial trial, using five kind of soils (medim texture yellow latosol, clayey yellow latosol, very clayey yellow latosol, clayey red-yellow podzolic and very clayey red-yellow podzolic), colleted in the suercial layer (0-20 cm fo depth). The phosphorus adsortion capacity of soils was determinated using as matheraatic model the Langmuir isotherm. It were used 5 g samples of each soil shaken for 16 hours in phosphate soluctions of various concentrations. The results of phosphorus adsorption maximum indicated that there were differences between the soil. The very clayey yellow latosol showed the most high phosphorus adsorption capacity, standing out the otheres. The clayey yellow latosol and clayey red-yellow podzolic present intermediate values of phosphorus adsorption maximum, while for very clayey red-yellow podzolic and médium texture yellow latosol was observed the most iow values. The phosphorus adsorption index presented betteer correlations with clay and organic matter content.; 6) Between dogs filarideos that have proeminence like most important is Dirofilana immitis e some oíDipetalonema gender.Dirofilariosis is a parasite disease that have been diagnose in many states of our country. It is caused hy Dirofilana immitis, where adults worms housed in right ventricule and pulmonar artery. This wormis cosmopolitan in areas oftropical and temperate climate. This disease have been consider to come up a zoonosis. This papes relate the previous results of prevalence ofD. immitis in Belém-PA. We used218 blood samples dogs {Canis familiarís) with various breed, sex and weight to determine prevalence of this filarideo; the dogs were more than 6 months of age, and it was 121 males and 97 females. The samples were colected between February and October of 1994. The methods used was search of raicrofilaria on dense gout, microhematocrito and modify Knott em fresh blood. We got 11 positive (5,04%) and ali was male between 3-12 years old. Despite many dogs bearing Dirofilanosis and not manifest nucrofilaria in blood stieam and diffuculty in diagnose occult form, and this paper is in initial phase, we believe that prevalence of D. immitis in Belém-Pa would be higher.; 7) Is reported occurrence ofendometrial cystic hiperplasia (piometra) associated to ovariam adenocarcinoma in a bitch belonged to breed "pug" with seven years old there was occurence of intermittent blood vulva, vaginal, abdominal enlargement, anorexia, polydipsia and polyuria, to the Ray X the uterine homs was with increasing radiodensity; at urianalysis: PH: = 6,0, density: 1051, possyurine, hematúria and crystaluria. Macrocytic nomalchromic anaemic, leucocytosis with linfocitosis, neutrophilia with DNNE and anaeosinophilia. Was observed in the macroscopic examination there was enlargement of uterine homs, evidencing after opening thickening ofmucosa and the lumen was with purulent exedate greenish with disagreeable adour. The left ovary has a habitual mophology, the right ovary has a white greyish tumoration measuring 5x5nt with fragile consisitence likely cauliflower. Histologicaly, the endometrial glands was enlarged and filies with discreet infiltration; in the neoplasic ovarian lissue, predominance of glandular tissue composed by cuboids cells with basophilic núcleo and skimpy cytoplasm presenting papilliform monostratifield pattem, being in some sequences stratified.

BOLETIM DA FACULDADE DE CIÊNCIAS AGRÁRIAS DO PARÁ, n. 21, dez. 1993

2024-04-24T19:21:55Z

Título: BOLETIM DA FACULDADE DE CIÊNCIAS AGRÁRIAS DO PARÁ, n. 21, dez. 1993; Enriquecimento de floresta tropical mecanicamente explorada com as espécies Cedrela odorata L. (Cedro) e Carapa guianensis Aubl. (Andiroba), no Planalto de Curuá-Una, Pará, Brasil, p. 1-21; Crescimento da Nitzschia sp. (Diatomaea, Nitzschiacea) em laboratório, p. 23-32; Análise univariada de inventários florestais contínuos: parcelas permanentes, p. 33-49; Estimativa por razão: aplicação em levantamentos florestais, p. 51-63; Formas de fósforo em solos do Estado do Pará-I-Latossolo Amarelo, textura média da parte noroeste da região Bragantina, p. 65-75 Autor(es): OHASHI, SelmaToyoko; COSTA, Luiz Gonzaga Silva; PEDROSO, Luiz Manoel; SOUZA, Raimundo Aderson Lobão de; ANDRÉATTA, Edemar Roberto; SILVA, Israel Diniz da; QUEIROZ, Waldenei Travassos de; VIEIRA, Lúcio Salgado; SANTOS, Paulo Cezar Tadeu dos; JÚNIOR, Mário Lopes da SILVA; COUTINHO, Roberta Maria Vita Abstract: 1) We carry out surveys of Cedrela odorata L. Une planting and anderson group planting with Carapa guianensis Aubl., located at the Curuá- Una experimental Station, Center of Timber Technology (CTM) of the Superintendency of Amazonian Development. The results were compared with others results in the tropics. We concluded that the initial growth ofthe Meliaceae need to be stimulate to avoid the Hypsipyla grandella Zeller attack.; 2) The unicellular alga Nitzschia sp. was tested its cultores with different media, here refered to as "A", "B", "C" and "D", to determine growth curves of this which has the potential to serve as substrate for shrimp-farming. Culture médium "A" was seento be the most economically viable, with the algae reaching a concentration of 6183, 33 x I0000 cells/ml in the 8th day of exponential growth. The poorest medium was "B", with a corresponding concentration of 1883,33 x I0000 cells/ml in the 8 th day.; 3) The paper discusses methods of data analysis from continous forest inventories. An example is given of a forest assessment carried out on five occasion analyzed by the Split Plot Univanate Methods.; 4) The paper discusses the application ofthe Ratio Estimates Method in the analysis of forest inventaries in tropical forests and analyses the real results of field survey which gave an efficience of 109,8%,; 5) The Bragantina Region, placed at northeast of Pará State, has an area of 16.428 km2, with climate oftypes Afi and Ami, in Koppen classification. Regional geology is represented by Quatemary that recovers the Pirabas and Pebas formation mainly. The soils of this region are Yellow Latosols medium texture dominantly. In order to determinate the P forms, two profiles and seventeen superficial samples ofYellow Alie Latosol médium texture were made, under bushy vegetation of Marapanim and Curuça areas. In P fractionation, the MEHTA methos et al., modified by VIEIRA, that consisls in elimination of cations through the strongly acid exchanged resin was used. The results showed low rates of ali P kinds and values very near between inorganic P (59%) and organic P (41 %) in a proportion of 1,5:1 respectively. The total P has presented mediai values of 110ppm, Also the analyses have shown there be relation between content of soils clay and total P, and also inorganic P.