Temperature is the main climate factor affecting dairy cows' heat stress. When the ambient temperature exceeds 21-24°C, the body temperature of Holstein cows is affected. According to reports, the high temperature of Holstein cows is 25 to 26°C. When the ambient temperature is higher than 26.5°C, the body temperature rises significantly, and its physiological function and production performance are affected. High-yielding dairy cows are more sensitive to heat stress. When the rectal temperature exceeds 39°C for 16 h, the milk yield of high-yielding cows decreases significantly.
Description:
Vitamin A is involved in the process of formation and preservation of function of epithelial tissues and mucous membranes, is important for fertility and is essential for vision. Vitamin D3 regulates and corrects calcium and phosphate metabolism in blood and plays an important role in the uptake of calcium and phosphate from the intestines. Especially in young, growing animal's vitamin D3 is essential for the normal development of skeleton and teeth. Vitamin E is as a fat-soluble intracellular antioxidant, involved in stabilising unsaturated fatty acids, thereby preventing toxic lipo-peroxides formation. Furthermore, vitamin E protects the oxygen-sensitive vitamin A from oxidative destruction in this preparation.
Indications:
Vitamin Ad3E,Vitamin Supplement,Vitamin Ad3E Injection,Animal Vitamins Hebei Kexing Pharmaceutical Co., Ltd. , https://www.kexingpharmas.com
Studies have shown that different breeds of cattle have different sensitivities to the warm environment. When the temperature exceeds 21.1 to 23.9°C, the body temperature of the European breed starts to rise, and at 26.7°C, the body temperature rises significantly; while the calf exceeds the ambient temperature. At 32.2°C, body temperature began to rise; body temperature of shorthorn cattle at 26.7°C was 1.1°C higher than that of 10°C, while temperature at the same time in both breeds was the same, indicating that cows of European breeds are more afraid of heat.