C.G. Schwab

TL;DR: Four Holstein cows with ruminal and duodenal cannulas were assigned to a 4 x 4 Latin square at each of four stages of lactation, using content and yield of milk protein as primary response criteria, and Lys appeared to be first- Limiting and Met second-limiting at peak lactation.

TL;DR: The industry awaits more robust and mechanistic models for predicting supplies and requirements of rumen-available N and absorbed AA, which will be useful in allowing for feeding lower protein diets and increased efficiency of microbial protein synthesis.

TL;DR: Results of this study indicate that early-lactation cows fed corn-based diets are responsive to increased intestinal supplies of Lys and Met and that the responses depend on dietary CP concentration, supply of metabolizable protein, and intestinal digestibility of the rumen-undegradable fraction of supplemental proteins.

TL;DR: Yeast culture increased the ruminal concentration of isobutyrate in cows fed the low crude protein (CP) diet and decreased the concentration of the high CP diet.

TL;DR: B-vitamin intake, duodenal flow, and ruminal synthesis are influenced by dietary forage and NFC contents, and amounts of B-vitamins synthesized were highest for niacin, followed by riboflavin, thiamin, B6, and folic acid.