Nutritional assessment of waste of cassava starch extraction dried in cattle feed

Abstract

This study aimed to evaluate the digestive power of waste of cassava starch extraction dried (WCSEd) and corn, in addition to determining the appropriate level of WCSEd to replace corn in the diet of cattle. Studies to evaluate the in vitro digestibility and in situ degradability were performed. The study used four cattle with rumen cannula, individually fed with diets containing increasing levels (0, 33, 66 and 100%) of WCSEd to replace corn, to evaluate the dry matter and nutrient intake and digestibility, pH and ammonia concentration of rumen fluid. The WCSEd showed differences in the in vitro digestibility of DM, OM and NDF (P < 0.05) compared to corn, but did not change the NDT and in situ degradability. As for in vivo reviews, the DM and nutrient intake was influenced by treatments in decreasing order, resulting in changes in the digestibility of DM, OM and NDT of diet, and a decreased concentration of N-NH3, but the pH was not affected. The residue from the extraction of cassava starch showed lower in vitro digestibility; however, ruminal degradability did not differ from corn. Their use in ruminant feed reduces the intake and degradation of feed, but improves the use of N-NH3 in the rumen.

Keywords

• Degradabilidade
• Digestibilidade
• Ingestão
• Parâmetros ruminais.