Vegetative and productive aspects of organically grown coffee cultivars under shaded and unshaded systems

Ricci, Marta dos Santos Freire; Rouws, Janaina Ribeiro Costa; Oliveira, Nelson Geraldo de [UNESP]; Rodrigues, Marinete Bezerra

Vegetative and productive aspects of organically grown coffee cultivars under shaded and unshaded systems

Arquivos

S0103-90162011000400006.pdf (232.7 KB)

Data

2011-08-01

Autores

Ricci, Marta dos Santos Freire

Rouws, Janaina Ribeiro Costa

Oliveira, Nelson Geraldo de

Rodrigues, Marinete Bezerra

Editor

Universidade de São Paulo (USP), Escola Superior de Agricultura Luiz de Queiroz (ESALQ)

Tipo

Artigo

Direito de acesso

Acesso aberto

Resumo

Although Coffea arabica species has its origin in the African understories, there is great resistance on the part of the Brazilian producers for growing this species under agroforestry systems as they fear that shading reduces production. This study aimed at evaluating some vegetative traits and the productivity of organically grown coffee (Coffea arabica L.) cultivars under shaded and unshaded systems. Twelve treatments consisting of two cultivation systems (shaded and unshaded) and six coffee cultivars were arranged in randomized blocks with four replicates, in a split-plot scheme. Shading was provided by banana (Musa sp.) and coral bean plants (Erythrinaverna). Shading delayed fruit maturation. Late maturation cultivars, such as the Icatu and the Obatã, matured early in both cultivation systems, while medium and early maturation cultivars presented late maturation. Cultivation in the shaded system increased the leaf area and the number of lower branches, decreased the number of productive nodes per branch, and increased the distance between the nodes and the number of leaves present in the branches. Cultivation in the unshaded system presented greater number of plants with branch blight in relation to plants grown in the shade. The productivity of the cultivars was not different, at 30.0 processed bags per hectare in the shaded system, and 25.8 processed bags per hectare in the unshaded system. The most productive cultivars in the shaded system were the Tupi, the Obatã, and the Catuaí, while no differences between cultivars were obtained in the unshaded system.