不同类型牛舍保温性能的研究

通过对3种不同结构及墙壁厚度的牛舍保温对比试验,对牛舍保温性能影响最大的是墙壁厚度,在舍外气温为-20℃的情况下,与墙壁厚度24、37和50cm相对应的舍内最低温度分别为-6.97、-2.03和5.57℃,极差达12.5℃,其作用强度占全部因子作用总和的59.78%;棚顶类型是第二因素,极差为5.67℃,其影响强度占27.05%,其中以塑料膜暖棚顶(夜间加保温层)的保温效果最好;试验误差的影响很小,只占全部因素总和的3.96%。经方差分析检验,墙壁厚度对畜舍保温性能的影响显著。

Effect of Different Type Cowshed to the Production Performance of Cow

Through the comparing experiments of three different type wall thickness and structure to warming performance of the cowshed,it could be seen that wall thickness was the greatest influencing factor on performance warming.When the outside temperature was-20 ℃,the lowest temperature in cowshed with walls thickness of 24 cm,37 cm and 50cm was-6.97,-2.03 and 5.57 ℃,respectively.The maximal temperature margin was 12.5 ℃,the impact of wall thickness to warming performance accounts for 59.78% of all factors.Type of shed roof was the second influencing factor,the maximal temperature margin was 5.67 ℃,the impact of this factor to warming performance accounts for 27.05% of all factors.Among which plastic film warming top(plus heat preservation layer at night) have the best warming effects.The impact of trial error was very small,only accounts for 3.96%.Using the analysis of variance,the impact of wall thickness to warming performance of cowshed is significant.