Food quantity and quality of cassava affected by leguminous residues and inorganic nitrogen application in a soil of low natural fertility of the humid tropics

Moura-Silva, Aline Gomes [UNESP]; Ferreira Aguiar, Alana das Chagas; Jorge, Neuza [UNESP]; Agostini-Costa, Tania da Silveira; Moura, Emanoel Gomes

Food quantity and quality of cassava affected by leguminous residues and inorganic nitrogen application in a soil of low natural fertility of the humid tropics

Arquivos

S0006-87052017000300406.pdf (684.53 KB)

Data

2017-07-01

Autores

Moura-Silva, Aline Gomes

Ferreira Aguiar, Alana das Chagas

Jorge, Neuza

Agostini-Costa, Tania da Silveira

Moura, Emanoel Gomes

Editor

Inst Agronomico

Tipo

Artigo

Direito de acesso

Acesso aberto

Resumo

The aim of this study was to test the hypothesis that the quality and quantity of biofortified cassava root in a humid tropical environment can be modified with the application of a combination of low- and high-quality residues of leguminous tree species. The experiment was designed as a 6 x 2 factorial (a combination of 4 legume species versus 2 levels of nitrogen) with 4 replications in a randomized block design and the following treatments: Gliricidia + Acacia, Gliricidia + Leucaena, Gliricidia + Clitoria, Leucaena + Acacia, Leucaena + Clitoria, and a control without legumes. We analyzed the shoot weight, number of roots/plant, root weight, root production, proximate composition, as well as the mineral, carotenoid, and pro-vitamin A contents. Root production increased with the application of high-quality residues. The protein level influenced the carotenoid content. The allelopathic effect of exotic genera - Leucaena and Acacia -, especially when combined, can decrease the mineral content such as potassium and, therefore, reduce the accumulation of starch.