Produtividade e valor nutricional do sorgo forrageiro e biomassa in natura e ensilado com o o uso de Azospirillum Brasiliense

Abstract

The sorghum is a forage alternative for animal feed in semiarid regions, due to its tolerance and avoidance to drought, it stands out in terms of productivity and nutritional quality. The genotypic variation of this crop is vast, and may express different potential in different regions. Based on the above, the objective was to evaluate sorghum biomass genotypes associated or not with Azospirillum brasilense managed at different sowing sites on the productivity and nutritional value of silage. The design used was in randomized blocks in a 3 x 3 x 2 factorial scheme, with 3 genotypes, 3 fertilization strategies and 2 sowing sites. Agronomic evaluations of structural components and plant production and bromatological evaluations of sorghum forage and silage were carried out. The nitrogen fertilization associated or not with Azospirillum brasilense did not influence sorghum production and quality. There were differences between the genotypes and the regions evaluated. Fertilization using Azospirillum brasilense does not influence sorghum genotypes. The region of Montes Claros has greater forage production and the region of Janaúba has better quality of silage. The biomass sorghum genotypes have higher forage production and the Volumax genotype has better silage quality.