Degradabilidade e produção de gases “in vitro” de coprodutos da cadeia de biodiesel.

Abstract

The objective of this research was to evaluate the degradability and gas production by the in vitro technique of different co-products generated by the domestic industry of biodiesel (soybean, canola, forragen a boand black girasol) on the production of gas at four levels (0, 30 , 50 and 70%) of replacing the elephant grass by co-products. The inoculum for in vitro incubation was obtained from three Holstein cows with rumen fistulas. The gas production was measured 3, 6, 12, 24 and 48 hours after incubation. The experimental design was completely randomized in a 4 x 4 factorial arrangement, with the factors represented by the co-products and levels. According to the results all co-products studied showed significant effect (P<0.05) by the diets. Soybeans in 48 hours of incubation was the byproduct that showed higher degradation compared to the others, but had low gas production, thus being the co-product more efficient and lower degradability was obtained with sunflower black. All studied byproducts may be used in the diet of ruminants, with potential suppliers of protein.