DSpace Communidade: Instituto de Ciências Agrárias

Metabolismo do carbono em progênies de Cupuaçuzeiro submetida à deficiência hídrica.

2026-01-21T00:00:00Z

Título: Metabolismo do carbono em progênies de Cupuaçuzeiro submetida à deficiência hídrica. Autor(es): MERCÊS, Júlia Karoline Rodrigues das; PALHETA, Juscelino Gonçalves; ALVES, Rafael Moysés; CUNHA, Roberto Lisboa; OLIVEIRA NETO, Cândido Ferreira de; CONCEIÇÃO, Susana Silva Abstract: In the Amazon, rainfall distribution is irregular, and distinct dry periods are common; water stress is known to reduce agricultural production. The objective of this study was to analyze the effect of water deficiency on leaf water potential, starch concentrations, total soluble carbohydrates, and sucrose in T. grandiflorum progenies exposed to 16 days of water restriction. The experiment was conducted in the greenhouse at Embrapa Amazônia Oriental. The seedlings were grown in plastic bags filled with 8 kg of pre-fertilized substrate. The experimental design was completely randomized, using a 2x7 factorial scheme. Each treatment was represented by five replicates, totaling 70 experimental units. An analysis of variance was performed on the results, and when a significant difference occurred, the means were compared using Tukey’s test (p<0.05) with the “SAS” software. Progeny 1074 showed the highest sensitivity to water restriction, with a significant reduction of 2,438% in leaf water potential. However, progenies 32 and 42 showed a significant reduction in starch concentration of 57% and 82% in the leaves, respectively; for the roots, progenies 57, 215, and 1074 showed reductions of 82%, 76%, and 69%, respectively. Therefore, a 16-day water deficit in Theobroma grandiflorum progenies led to a decrease in leaf water potential and starch content. At the same time, there was an increase in the concentration of total soluble carbohydrates and sucrose in all progenies subjected to water restriction.

Aproveitamento de resíduos de frutas para compostagem.

2026-03-10T00:00:00Z

Título: Aproveitamento de resíduos de frutas para compostagem. Autor(es): VALE, Wanderson Dias; BRONZE, Antonia Benedita da Silva; CARVALHO, Salma Saraty de; TRINDADE, Viviandra Manuelle Monteiro de Castro; BRITO, Sinara de Nazaré Santana; MONTEIRO, Harleson Sidney Almeida; CARVALHO, Adonay Saráty; MACEDO, Williams Jorge da Cruz; LIMA, Gahriela Ribeiro; ALMEIDA, Layse Barreto de; LOPES, Paulo Roberto de Andrade Abstract: The purpose of this booklet is to assist farmers in producing fertilizer by utilizing organic waste from fruit processing through a process known as composting. This booklet is the result of an extension project carried out in the Rural Community of Iracema in the municipality of Castanhal, Pará, based on initiatives that guide and inform rural producers about the importance and benefits of utilizing waste available on the farm, using composting as a technique for reusing organic fruit waste produced in agro-industrial processing facilities. Thus, one of the objectives of the project developed in the Iracema community was to contribute to good practices in the production and processing of agricultural and livestock products, taking into account aspects of sustainable development, food safety and sovereignty, agroecology, cleaner production, and waste management.

Avaliação da implementação da política estadual de rastreabilidade na cadeia produtiva do açaí no estado do Pará

2026-01-21T00:00:00Z

Título: Avaliação da implementação da política estadual de rastreabilidade na cadeia produtiva do açaí no estado do Pará Autor(es): PIMENTEL, Lucionila Pantoja; NEVES, Ana Karen de Mendonça; MONTEIRO, Elideth Pacheco; LOPES, Maria Lúcia Bahia; FILGUEIRAS, Gisalda Carvalho; COSTA, Deborah Luciany Pires; LOUREIRO, João Paulo Borges de; SANTOS, Marcos Antônio Souza dos Abstract: This article evaluates the implementation of the state policy for traceability in the açaí production chain in the state of Pará, operated by the Agricultural Defense Agency of the state of Pará, from 2021 to 2023, through Ordinance No. 2.789/2020, which institutes the Plant Transit Guide (GTV). The 5C Protocol by Najan (1995) was used, which establishes five interdependent evaluation dimensions: content, context, capacity, competence, and clients and coalitions. The work was developed based on documentary research, involving legislation, institutional reports, and data from Adepará's control systems. The capacity and commitment dimensions highlighted limitations related to the scarcity of human resources and planning, evidencing the need for greater institutional support to ensure the effectiveness of the policy. The dimensions of content, context, customers and coalitions highlighted the importance of promoting social inclusion, greater transparency, access to technologies and technical training, which are essential factors for increasing the adherence of actors in the production chain to the traceability policy. Despite these limitations, the initial results of the implementation of the Plant Transit Guide (GTV) for açaí were positive, with progress in the registration of production units, expansion of coverage of the target audience and an increase in the issuance of GTVs. The results presented provide support for Adepará and other actors involved in this production chain, proving to be a useful tool in evaluating the implementation of public policies.

Guia de beneficiamento primário do cacau de várzea das ilhas de Mocajuba, Pará.

2025-10-16T00:00:00Z

Título: Guia de beneficiamento primário do cacau de várzea das ilhas de Mocajuba, Pará. Autor(es): TRINDADE, Maria José de Sousa; SOARES, Adriene Mayra da Silva; SANCHES JUNIOR, Francisco de Sousa; SANCHES, Catarina de Sousa; THALES, Marcelo Cordeiro; VILHENA, Maria do Perpétuo Socorro Progene Abstract: This guide was developed based on a study conducted in the islands of the municipality of Mocajuba, within riverine properties situated in the mesoregion of northeastern Pará, on the left bank of the Tocantins River in the state of Pará, Brazil. Presently, the state stands as the nation's foremost cocoa producer, exhibiting significant potential for the cultivation of differentiated fermented and dried cocoa beans due to their unique physicochemical and organoleptic properties (aroma and flavor). The native cacao tree (Theobroma cacao L.) flourishes along the Tocantins River and its tributaries, coexisting with açaí palms (Euterpe oleracea), rubber trees (Hevea brasiliensis), andiroba (Carapa guianensis), and virola (Virola surinamensis), among others. These regions are characterized by floodplain forests that possess natural fertility—deemed medium to high—and are well-adapted to the seasonal water cycle. At the project's inception in December 2021, the majority of cocoa beans from the 'island cocoa' of the municipality were sold at low added value, as they failed to meet all quality standards. Descrição: Publicação realizada no âmbito do Projeto: “Beneficiamento primário, propriedades físicas e químicas das amêndoas de cacau nativo (Theobroma cacao) e sistema informativo geográfico das ilhas de várzea”. Uma pesquisa da Universidade Federal Rural da Amazônia (UFRA), com o Museu Paraense Emílio Goeldi (MPEG-CCTE) e a Universidade Federal do Pará (UFPA-PPGCTA/CVACBA), financiado pelo Governo do estado do Pará por meio da Fundação Amazônia de Amparo a Estudos e Pesquisas (Fapespa).