Foliar decomposition rate of species used in agroforestry systems

• Autor(a) principal: Leal de Sousa, Iara Rayana
• Data de Publicação: 2020
• Outros Autores: Pauletto, Daniela, Lopes, Lucas Sérgio de Sousa, Rode, Rafael, Peleja, Vanessa Leão, Freitas, Bruna Bandeira de
• Tipo de documento: Artigo
• Idioma: por
• Título da fonte: Revista Verde de Agroecologia e Desenvolvimento Sustentavel
• Texto Completo: https://www.gvaa.com.br/revista/index.php/RVADS/article/view/6734
• topic: Burlap; Nutrient cycling; Green adubation; Decomposition coeficiente; Serapilheira; Ciclagem de nutrientes; Adubação verde; Coeficiente de decomposição

Agroforestry systems (SAFs) promote agro-ecosystem sustainability through energy interactions and nutrient cycling through the production and decomposition of biomass on the soil. The objective of this work was to evaluate the leaf decomposition of species used in green manure and economic interest in agroforestry systems. The study was carried out at the experimental SAF of the Federal University of Western Pará (UFOPA). Analyze a leaf decomposition of six species, being cocoa (Theobroma cacao L.), coumaru (Dipteryx odorata (Aubl.) Forsyth) and black pepper (Piper nigrum L.) pig (Canavalia ensiformis (L.) DC.) , gliricidia (Gliricidia sepium (Jacq.) Walp.) and pigeon pea (Cajanus cajan (L.) Huth) species of green manure. To follow the decomposition, use the sandbag method with avocado experiments in the rainiest and least rainy temperatures. The remaining leaf mass data were statistically analyzed by the Tukey test and adjusted using a non-linear equation to check the decomposition constant (k) and half-life (t1 / 2). As species indicated for green manure, they present the highest decomposition rates until the end of the experiment, in which gliricides and pig grains are obtained as the highest rates. Among the species chosen for economic interest, black pepper shows the return of nutrients to the upper soil such as cocoa and cocoa species. The dry season lost mass loss slower than the rainy season.