Lowering protein levels and increasing fermentable carbohydrates in concentrates fed to dairy cows on pasture may boost nitrogen use efficiency an reduce emissions into the environment, say researchers
Research: Forage and protein use efficiency in dairy cows grazing a mixed grass-legume pasture and supplemented with different levels of protein and starch by U.Dickhoefer, S.Glowacki, C.A.Gómez, J.M.Castro-Montoyaa
• Lowering dietary protein supply may not reduce animal feed intake and performance.
• Starch-rich supplements may reduce digestibility in cows on high-quality pastures.
• Feeding low-protein supplements reduce urinary nitrogen excretion in grazing cows.
• Forage protein supply is sufficient in low-performing cows on grass-legume swards.
Source : Livestock Science