https://repositorio.ufra.edu.br/jspui/handle/123456789/156 Programa de Pós-Graduação em Ciências Agrárias (Agroecossistemas da Amazônia) - Extinto. 2026-10-19T00:56:04Z https://repositorio.ufra.edu.br/jspui/handle/riufra/2944 Título: Estabelecimento de leguminosas e atributos físicos, químicos e biológicos do solo sob influência de diferentes manejos de pastejo em Igarapé-açu, Estado do Pará. Autor(es): ABREU, Eliana Maria Acioli de Abstract: In Oriental Amazonia, the growing demand for improvements in productivity and competitiveness in the agricultural sector, the production of low costs supplements, among which are legumes intercropped with grass, is a major step for the development of animal production systems. The main expectation of the use of legumes is the improvement of animal production compared to grass pasture exclusively. The effects of animal distribution and days of grazing rest, are also crucial to maintain the sustainability of livestock production system. Information about its effects on physical, chemical and microbial biomass quality of pastures soil are still rare. The objective of this study was to evaluate the influence of different catle distribution and different days of grazing rest , about the establishment of legumes Flemingia macrophylla and Cratilia argentea, on the physical, chemical and biological attributes of yellow claysoil under a already established pasture of Brachiaria brizantha cv. Marandu, located in Igarapé-Acu, Northeast of Para in function of grazing systems with different animal allotment rate and resting days of the pasture (SPl= 1UA/ha and 56 resting days; SP2= 0,7UA/ha and 28 resting days; SP3= 0,7UA/ha and 56 resting days) and four seasons to sampling (April/2007 — rainy weather; October/2007 — dry weather; April/2008 — rainy weather; October/2008 — dry weather), in the layers 0-10, 10-20, 20-40, 40-60 cm for evaluation of the physical attributes and in the 0-10, 10-20, 20-50 cm for the chemical ones. The biological attributes, were evaluated just in the depth of 0-10 cm. The experimental outlining was blocks by chance with three repetition. The treatment, conform the variable to be evaluated, were distributed in quotas sub and subdivided. Singly, the grazing systems influenced the studied variable. It follows that the handling systems used, did not influenced on the legumes establishment, on the physical and chemical attribute, and on the carbon and nitrogen from the microbial soil biomass though, they showed significant differences on the sample soil depth and on the seasons evaluated. 2026-09-24T00:00:00Z https://repositorio.ufra.edu.br/jspui/handle/riufra/2923 Título: Morfoanatomia, fitoquimica, fenologia e determinação de metais em espécies de Croton L. medicinais Autor(es): TRINDADE, Maria José de Sousa Abstract: To enhance understanding of Croton sacaquinha and two morphotypes Croton cajucara, species of medicinal plants Euphorbiaceae, where Croton cajucara included in the National List of Medicinal Plants of Interest the National Health System, this work aimed to characterize the morphology, phytochemical, phenology, and metal content Croton medicinal, both grown in the Garden of medicinal plants Amazônia Oriental. The results point to several morpho anatomical structures that differentiate taxa as the presence of trichomes with different shapes (tufts, starry with secretory cells at the base, cuminado with the adjacent, simple aculeate). The phenology of the studied taxa, indicate that there is influence of seasonality, which may be related to characteristics of the amazonian climate. Already analyzed minerals in two Amazonian climatic periods showed a uniform behavior, following the trend of distribution in ascending order: K >Na >Mg > Ca > Mn >Zn > Cu > Fe. 2026-07-14T00:00:00Z https://repositorio.ufra.edu.br/jspui/handle/riufra/2899 Título: Crescimento, alterações ecofisiológicas e bioquimícas em plantas jovens de jatobá (Hymenaea courbaril L) submetidas à deficiência hídrica e ao alagamento Autor(es): OLIVEIRA NETO, Cândido Ferreira de; BANCA 1 - Benedito Gomes dos Santos Filho ; BANCA 2 : Marco Antônio Menezes Neto; BANCA 3- Maria Auxiliadora Feio Gomes, BANCA 4 - Heraclito Eugênio Conceição de oliveira Abstract: Jatobá is a Neotropical tree that has economical, ecological and environmental importance. Several research demonstrate that this species can be extracted many substances, besides it to have potential to uses in commercial and agroforestry reforestations. Excess or deficit in water supply to plant can promote metabolic changes and consequently to modify your growth. Plants when exposed to stress response through several defense mechanisms. Tolerance to dehydration is linked to substances called by osmoregulators such as carbohydrates, proline, glycine betaine, free amino acids, which will have function to keep water by the more time possible into plant tissue Based in this information, this study haves aim to evaluate growth, eco physiological changes, and biochemical in Jatobá young plants subjected to water deficiency and flooding. Experiment was conducted in greenhouse environment located in Instituto de Ciências Agrárias (ICA) of Universidade Federal Rural da Amazônia (UFRA), in Belém city, PA, Brasil Experiment period was between 20/09/2008 to 20/05/2009. Jatobá young plants (H. courbaril L.), with 4 months of age, propagated via sexual, from seeds harvested in petroliferous province of Rio Urucu, operational base Geólogo “Pedro de Moura' in Urucu, Coari city, AM, distance of 650 Km, in line, of Manaus city. Seeds were harvested in November of 2008, in areas of 20 extraction field: RUCO6, RUC10, JAZ5, JAZ16, RUC 31; RUC 25; JAZ 97; JAZ 06; JAZ 16; JAZ 21; CL 10; CL 33; CL 11; CL 05; CL 04: SUC 03; SUC 02; SUC 01; LUC 29; LUC 39. After harvest, seeds were placed in paper bags hermetically closed and transported to laboratory of Fisiologia Vegetal of UFRA, Belém, PA. Plants were subjected to three water regimes (control, water deficit, and flooding), that were applied 30 days under water deprivation and flooding through a water lamina of 5 cm up soil, respectively. Design experimental was entirely randomized with three water conditions (control, water deficit, and flooding), with 15 replicates, totalizing 45 experimental units, each experimental unit was composed by one plant per pot. In results were applied variance analysis and average compared by the Tukey test in 5% significance level. Biochemical and ecophysiological variables were investigated, which present influence on vegetative growth of Jatobá plants. Water deficit and flooding provoke reduction in key enzyme activities related to nitrogen metabolism and changes in dehydrogenase alcohol and dehydrogenase lactate. Besides of this, water stress also changed behavior of nitrogen compounds such as amino acids, proteins, ammonium, producing osmoregulator substances as proline, glycine betaine, carbohydrates, and sucrose. Water deficit and flooding affected plant development, being demonstrated in height, stem diameter, dry matter production Water deficit and flooding applied act in water relations, reducing significantly leaf water potential, and these are highly correlated. During period under water deficit and flooding were showed significant decreases in transpiration, and consequent increase in diffusive resistance. Also were showed significant increases in organic solute levels, in agreement with treatment severity, being proline the organic solute that presented higher sensibility to water deprivation. Jatobá young plants paralyze not your growth when cultivated with low water available in soil during initial phase of development. This species studded is few susceptible to flooding, if compared to water deficit, because without water it presented adequate osmotic adjustment process, although these results are not sufficient to testes in study of forestry specie under environment effects 2026-05-25T00:00:00Z https://repositorio.ufra.edu.br/jspui/handle/riufra/2894 Título: Caracterização, avaliação morfológica e morfoanatomia da lâmina foliar de acessos de Pilocarpus microphyllus Stapf ex WardleworthRutaceae, Ananas comosus var. erectifolius (L. B. Smith) Coppens & F. Leal-Bromeliacea e Psychotria ipecacuanha (Brotero) Stokes-Rubiaceae, conservados no banco ativo de Germoplasmа Autor(es): ANDRADE, Carlos Renato Silva Abstract: This study aimed to characterize and evaluate the morphological and morphoanatomic of Pilocarpus microphyllus hits Stapf ex-Wardleworth Rutaceae, Ananas comosus var. erectifolius (L. B. Smith) Coppens & F. Leal-Bromeliacea and Psychotria ipecacuanha (Brotero) Stokes-Rubiaceae, stored in Active Germplasm Bank of medicinal plants at Embrapa Amazônia Oriental, in Belém, PA. For both were chosen at random. 10 accessions of each species, being characterized for 3-9 qualitative characters and evaluated to 3-4 quantitative traits. For qualitative characters were obtained the occurrence percentages, while quantitative were analyzed by univariate and multivariate analyzes, the latter obtained by standardized mean Euclidean distance. The Morphology of the three species was performed by the leaf or lamina and in leaflet, and the presence of polymorphic crystals. Was diagnosed during the study, the characters can subsidize the initial drafting of a list of descriptors or morphological characters, which can be used in the characterization and evaluation. 2026-05-22T00:00:00Z