Evaluation of By-Product Feeds by In Situ Degradation in the Cow Rumen

抄録

Various by-products of food growing and processing industries were evaluated for use in animal feeds. The by-products studied were tofu by-products (TF), brewers wet grains (BWG), soy sauce cake (SSC), apple juice pulp (AJP), mushroom bed (MRB), buckwheat hulls (BWH), rice husk (RH), saw dust (SD), and wheat straw (WS). Tofu by-products were further made into silage (TFS), or treated with enzyme (TFE).
Chemical analysis alone can not predict the true value of these by-products. Degradation in the rumen of cattle (in situ method) provides better evaluation of these by-products for use as animal feed.
Dry matter disappearance of more than 90% was observed in SSC, AJP, TFF, and MRB. Disappearance of 60-90% DM were observed in TFS, BWG, TFE, and WS. BWH, RH, and SD were very poorly degraded in the rumen. Among the tofu materials, silage showed faster degradation in the rumen. Addition of enzyme in the tofu silage helped it to slow the degradation which might be beneficial for use in cattle feed. Higher DM degradation of MRB relative to BWG indication that it can be used in cattle feed at low inclusion rate.