Test of Influence of Noise Pollution on Production Performance of Stock Fowl

The test conducted with two chicken houses of Longwei Poultry Breeding Company. One chicken house was serious polluted by transport on road and by the machines in the feed workshop next to the house. The sound level was about 85 decibel in the day. The other chicken house had a good surround-ing for the sound level was about 63 decibel. Compared with former chicken house, laying ratio in later one increased by 13.6%,broken egg ratio decreased by 3.73% and spermatigation ratio increased by 1.3%.