Avaliação de genótipos de trigo duplo-propósito para a produção de forragem e grãos

Abstract

This research aimed to evaluate the forage and grains yield in two genotypes of dual purpose wheat, compared to a grains purpose genotype sumitted to two harvest regimes. Genotypes evaluated were: BRS Tarumã and BRS Umbu for dual-purpose, and BRS Parrudo, for grain production purpose. Genotypes were divided into 18 experimental plots and were subjected to three treatments: control (without harvest), one and two harvests. The experimental design was completely randomized with six treatments, in a factorial arrangement 3x2 (three genotypes and two harvest systems) . The variables evaluated were forage mass, structural composition, forage production and grain yield. The results confirmed that the genotypes Tarumã BRS, BRS Parrudo and BRS Umbu have different characteristics, and different skills may be identified. We conclude that the harvest regime affects the productivity of forage and grain, and, with the succession of harvest, there is a positive result in the production of forage and negative at grain yield. In this sense, the BRS Tarumã, although with lower forage production, is more tolerant to harvests, with no significant damage to grain yield. BRS Umbu dual is the dual purpose genotype more suitable for grain production. BRS Parrudo had the best grain yield, due his genetic purpose. Therefore, he did not respond well to the harvests, taking heavy losses in the production of grains.