生产环境因素对架子牛育肥效果的影响研究

Studies on Effect of Environmental Factors on Fattening of Cattle

实践证明,当环境温度在-2～5℃之间变化时,对育肥牛增重的影响极其显著,而在5～12℃之间变化时的影响则趋于缓和;当畜舍空气NH3含量在20～30 mg/m3之间变化时,则对育肥牛增重产生明显影响;环境湿度和饲养密度这两个因素在第1～2水平间变化时,对育肥牛增重无显著影响,但在第2～3水平间变化时则产生一定的影响。

Practice has proved that when the temperature changed between-2 and 5 ℃,its effect on weight gain of fattening cattle was extremely significant,whereas the temperature changed between 5 to 12 ℃,its effect was less.When barn’s NH3 content in the air changed between 20-30 mg/m3,it affected the weight gain of fattening cattle significantly.Environmental humidity and animal density had no significant effect on weight gain of fattening cattle when they were changed between 1 and 2 level,but the effect was rather great when they changed between 2 and 3 level.