BACKGROUND The continuing growth of the ethanol industry has generated large amounts of various distillers grains co-products. These are characterized by a wide variation in chemical composition and ruminal degradability. Therefore, their precise formulation in the ruminant diet requires the systematic evaluation of their degradation profiles in the rumen. METHODS Three distillers grains plus...

The objective of this study was to evaluate the effects daily supplementation with a low dosage blend condensed and hydrolysable tannins on in vitro situ digestibility protein fibrous feedstuffs. In ruminal incubation assays were conducted seven five roughage feedstuffs without tannin (1 g/kg DM intake). From these same cattle, rumen fluid collected for incubations we evaluated gas production (...

Feeding corn dried distillers grains with solubles (DDGS) in low crude protein (CP) diets could limit N waste lactating cows. However, it also possibly reduce metabolizable AA supply, especially Lys, and compromise milk production. Therefore, the objective of this study was to evaluate effects feeding supplemental blends rumen undegradable (RUP) rumen-protected (RP) a compared high CP diet cont...

Maize silage-based diets with three dietary crude protein (CP) supplements were offered to 96 finishing cattle of contrasting breed (Holstein Friesian (HF) v. Simmental × HF (SHF)) and gender (bull v. steer) housed in two types of feeding system (group fed v. individually fed). The three protein supplements differed either in CP or protein degradability (degradable (LUDP) v. rumen undegradable ...

Dietary protein intake is the most important factor determining milk production, milk composition, milk nitrogen efficiency, urinary nitrogen losses, urea content in milk and consequently, ammonia emissions from dairy cow manure. According to the nutrition requirements two main protein sources are available for cows: rumen degradable protein, provided to the animal through ruminally synthesized...