飞机噪声对乳牛的影响

The Influence of Airplane Noise on Cows

为了进一步了解飞机噪声对乳牛的影响，本研究抽样调查了８２头泌乳期黑白花母牛在飞机低空飞行时噪声影响前后的生理表现．飞机噪声使母牛出现明显的应激和狂暴，并干扰了母牛正常的泌乳反射．噪声使当日早晨个体平均挤乳量由正常的１０．１１±２．５６ｋｇ降至９．１４±２．８３ｋｇ．噪声对乳牛的影响有延续性，在噪声发生后的第二个早晨，挤乳量继续降至９．２２±２．７０ｋｇ水平．因此，乳牛场的选址应避开空运航线．

To better understand the influence of airplane noise on cows,the physiological Performance of 82 milking Black and white cows were examined before snd afterthe noise of a passing-by airplane at a low altitute. The results showed that the noisemade the cows stressed and mad. The cow's let-down reflex was interrupted. The milkyield per cow in the noisy morning was drasticly decreased from ordinary level of 10. 11±2. 56 to 9. 14± 2. 83kg. The noise influence was successive,and it caused a decreasedmilk yield of 9. 22±2. 70kg per cow on the following morning. Therefore,dairy farms are suggested to be lo-cated away from airline.