Impacts of dietary arginine supplementation on performance, nutrient digestion and expression of proteins related to milk fatty acid and casein synthesis in early lactating dairy cows.

ABSTRACT: Arginine (Arg) can potentially increase milk yields in early lactating dairy cows by stimulating the development of mammary gland and the biosynthesis of milk proteins and fatty acids (FA); however, the underlying mechanism is still unclear. The hypothesis that rumen-protected Arg addition would increase milk, milk fat, and milk protein yields was tested, aiming to dlucidate the possible mechanism. Forty-eight multiparous Chinese Holstein dairy cows (milk yield 34.9 ± 1.27 kg/d, body weight 658 ± 12.7 kg, and days in lactation [DIL] 16.4 ± 2.56) were selected on the principle of proximity and blocked by DIL and milk yield, and divided into one of four groups in a randomized block design: control (without RPArg), low RPArg (LRPArg; 20 g/d Arg), medium RPArg (MRPArg; 40 g/d Arg), and high RP

SUBMITTER: Zhang J 

PROVIDER: S-EPMC12145670 | biostudies-literature | 2025 Jun

REPOSITORIES: biostudies-literature