Effects of rumen-protected γ-aminobutyric acid on performance and nutrient digestibility in heat-stressed dairy cows

• Published in: Journal of dairy science Vol. 97; no. 9; pp. 5599 - 5607
• Main Authors: Cheng, J.B., Bu, D.P., Wang, J.Q., Sun, X.Z., Pan, L., Zhou, L.Y., Liu, W.
• Format: Journal Article
• Language: English
• Published: United States Elsevier Inc 01.09.2014
• Subjects: Animals; Body Temperature; Cattle; Cattle Diseases - drug therapy; Cattle Diseases - metabolism; Dietary Supplements; Digestion - drug effects; Eating - drug effects; Female; gamma-Aminobutyric Acid - administration & dosage; heat stress; Heat Stress Disorders - drug therapy; Heat Stress Disorders - metabolism; Heat Stress Disorders - veterinary; Hot Temperature; Lactation - drug effects; Milk - chemistry; Milk - cytology; Milk Proteins - analysis; milk yield; Rumen - metabolism; γ-aminobutyric acid; heat stress; milk yield; γ-aminobutyric acid

This experiment was conducted to investigate the effects of rumen-protected γ-aminobutyric acid (GABA) on performance and nutrient digestibility in heat-stressed dairy cows. Sixty Holstein dairy cows (141±15 d in milk, 35.9±4.3kg of milk/d, and parity 2.0±1.1) were randomly assigned to 1 of 4 treatm...