SIMULAÇÃO DE DESFOLHAS EM DIFERENTES ESTÁDIOS VEGETATIVOS NA CULTURA DA SOJA, CULTIVAR BRS VALIOSA RR

Abstract

The objective of this study was to evaluate the effect of artificial defoliation at different stages of vegetative in soybeans. The experiment was carried out in the experimental area of IF Goiano - Campus Morrinhos and conducted in lineation with randomized blocks, with eight treatments and four replications. The cultivate BRS Valiosa RR was subject to the following treatments: T0: without defoliation; T1: removal of a leaflet by trefoil in V2 to V8; T2 removal of a leaflet by trefoil in V3 to V8; and so on until reaching the last treatment T7 8 removal of a leaflet in a trefoil V8. The variables analyzed were: plant height, insertion of first pod, chlorophyll index, number of branches, number of pods, number of grains per pod, thousand grain weight and final crop yield. The data were submitted to analysis of variance by Scott-Knott test at 5% probability, through ASSISTAT software. It concludes that continuous defoliation level of 33% in the early stages of culture reduces the size of the plant, number of pods per plant and final yield of the plant.