Silagem de resíduos da cadeia produtiva da mandioca como fonte alimentar de ruminantes

Abstract

The technique of forage conservation has been adopted to address the shortage of food for use in feed for livestock, especially during the dry season . This study aimed to assess the quality of silage upper third of cassava increased with different inclusion levels of cassava peel in different storage times ( 60 and 90 days ) . The material was ensiled in 30 experimental silos made of PVC pipe . The cassava peel was added to the material at the time of ensiling , based on natural matter , with the following levels : 0.0 g / kg (T1), 100.0 g / kg (T2), 200.0 g / kg (T3), 300.0 g / kg (T4) and 400.0 g / kg (T5) inclusion of cassava peel . The silos were opened after 60 and 90 days of ensiling . We determined the chemical composition - bromatological , the fractionation of protein and carbohydrates and degradation kinetics study using the technique of in situ . The inclusion of cassava peel silage to be incorporated in the upper third of the aerial part of cassava increased the dry matter content of the silage . However , protein levels decreased linearly as the inclusion of cassava peel , as well as fiber and indigestible fractions of protein and carbohydrates . By analyzing the curve of the potential degradability of silages with 60 days of storage showed higher values for treatments 300 and 400 g / kg immediately at the initial time of incubation and lower values for the treatment without the addition of the shell. Regarding the effective degradability of DM and NDF of silages with 90 days of storage, it was found that treatment with 400g/kg of hulls showed the most degradability pass rates 2 % 5 % 8 % as a consequence of the greater amount of non-fiber carbohydrates . Soon silages upper third cassava showed good fermentation quality and nutrition and the storage time of 60 and 90 days with inclusion levels of 300 and 400 g / kg of bark.