Cultivares e estádios de colheita no rendimento forrageiro da soja

Abstract

This study aimed to evaluate the influence of different genotypes and cutting periods on the yield and quality of soybean hay. The experiment was carried out on the agricultural year of 2001/02 at the experimental area of UFLA (University of Lavras), Lavras, MG. The experiment was arranged in randomized blocks design, in a factorial scheme (5X3) with three replicates, understanding two cultivars (Conquista and Monsoy 8400) and five cutting periods (phenological stages R2, R3, R4, R5 and R6). The different cultivars influenced just the crude protein yield. The biggest dry matter, hay and crude protein yields were reached on phonological stages R4, R5 and R6. Was verified that the crude protein yield decreased from the stage R5 to R6. That could be associated to the dilution effect in the dry matter and to a hydric stress. It is inferred that the stage of development R4 is the best cutting period option for hay, concerning the quality of the hay. The cultivar Monsoy 8400 presents, in relation to Conquista, the best option for production of the hay.