北方地区夏季通风喷淋对肉牛增重、免疫及内分泌指标的影响

Abstract

Abstract: The present study was conducted to study the effects of ventilating and spraying on the gain performance, immune function and incretion of beef cattle in north China from the point of animal welfare. Twenty-eight Holstein bull calves with similar body weight and age were randomly divided into two groups with two reduplicates in each group. One was the experimental group with the device of fan and water sprayer, and the other was the control group.The experiment lasted for 28 d. The results showed that the environmental state in animal house was significantly improved by ventilating and spraying, and feed intake was significantly increased (P<0.05). In addition, the concentrations of ACTH and CORT in serum were significantly reduced (P<0.01), and the concentrations of GH, IgG and IgM in serum were significantly increased compared with the contral group in every test stage. Overall, gain performance and immune function were ensured and animal welfare was improved by ventilating and spraying.

Key words: beef cattle; ventilating; spraying; gain; immunity

CLC Number:

S815.3

ZHAO Yu-guo, SHI Bin-lin, YAN Su-mei, ZHANG Xiong-jie, CUI Yu-ming, LIU Xiao-jing, GUO Yi-wei. Effects of Ventilating and Spraying on Gain Performance, Immunity and Incretion of Beef Cattle in North China[J]. .

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Effects of Ventilating and Spraying on Gain Performance, Immunity and Incretion of Beef Cattle in North China

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