MANEJO COM HERBICIDAS NA FASE DE IMPLANTAÇÃO DO COMPONENTE ARBÓREO EM SISTEMA AGROSSILVIPASTORIL

Abstract

Current alternative for less agriculture environmentally impacts and at the same time providing an economic gain, are the agricultural production or agrosilvipastoral integrated systems. However, there is a gap in the management of these systems about the tree seedlings implantation and the herbicides management in alley cropping. The first study aimed to evaluate the selectivity of Baru (Dypterix alata), Angico (Anadenathera colubrina), Eucalyptus144-Urograndis (E. urophylla x E. grandis) and VM01-Urocam (E. urophylla x E. camaldulensis) tree species to different herbicide doses in a greenhouse in order to implement an agrosilvipastoral system. In the second study, the objective was to evaluate the initial development of two native tree species: Baru (Dypterix alata), Angico (Anadenathera colubrina) and Eucalyptus-14-Urograndis clone (E. urophylla x E. grandis) in agrosilvipastoral system under herbicide application in corn and soybean crops implanted in the inter-row spacing. The greenhouse experiment was carried out at the Federal Goiano Institute in Rio Verde with different herbicide doses evaluating intoxication, physiological and dendrometric analyzes. The field work was carried out at the School Farm of the Federal Goiano Institute in Iporá, where the initial establishment of the seedlings was evaluated as well as their tolerance to the drift effect of herbicides in field. Given the greenhouse work, it was possible to observe selectivity of Angico, Baru and Eucalyptus Urograndis and Urocam plants with mesotrione herbicide at all doses used, but for glyphosate the seedlings showed sensitivity, except for Baru. In the field work the herbicide drift effect was not verified in the tree species due to an adequate management that was performed.