密闭式鸡舍内环境参数对罗曼蛋鸡生产性能的作用研究

EFFECTS OF HEAT FACTORS ON PRODUCTIVITY OF LOHMAN-BROWN LAYERS IN ENCLOSED-HOUSES

本文应用多元分析对密闭式鸡舍内的热因素与罗曼蛋鸡产蛋性能间的关系进行了研究，结果表明，热因素与产蛋性能间的关系非常密切，其中舒适度指数（THI）在产蛋高峰期和产蛋后期对产蛋性能的影响较为明显，在高温高湿环境下，舍内的干球温度（Tdb）和湿球温度（TWb）两个参数对产蛋性能影响较大．当舒适度指数超过60～72范围时，产蛋性能明显下降．

Multivariate analysis was applied to study the relationship between a few heat factors and productivity of Lohman-Brown layers in enclosed-house.The results showed that there was very close relationship among the heat factors involved in this study,the thermo-hydro index(THI) had relatively significant influence on the laying performance of Lohman-Brown layers during the peak period and the later period of laying performance.At high temperature and humidity,the temperature of both dry-bulb and wetbulb also had important effects on laying performance.When THI was beyond the range of 60—72,the Laying performance significantly declined.