Nutrient reliese and productivity of agroforestry species in agroforestry systems in Amazônia

Abstract

To join together trees with technologies, to select appropriate technologies with different categories of users of the land, and design a specific technology to offer an effective solution for one problem of use of the land, are some of the tasks necessary to reach the goals of the productive agroforestry systems. The main objective of this work was to evaluate the growth and the productivity of agroforestry systems, with different practical of handling, implanted in the state of Roraima. The study was lead in experimental field in the state of Roraima, with information generated between 1995 and 2002. Two agroforestry models were studied, being composites for annual cultures at the beginning of the implantation followed of banana tree (Musa sp. cv. Missouri); ingá-de-metro (Inga edulis); gliricídia (Gliricidia sepium); cupuassu (Theobroma grandiflorum); palm heart (Bactris gasipaes); Brazil nut (Bertholletia excelsa); cupiuba (Goupia glabra). The low fertility of soil affected the growth and the productivity of the annual crops, were the cassava had the best results. The biomass from the pruning of ingá-of-meter and gliricídia contributed for the maintenance of the soil fertility. Cupuassu was the specie that presented better productive, becoming the component most important of the agroforestry systems.