河北省不同建筑类型的肉牛场舍内外有害气体的比较研究

通过检测河北省不同地区6个有代表性建筑类型的肉牛场舍内外空气中的有害气体,对夏季和冬季肉牛舍的空气环境质量进行分析。不同季节各牛场的舍内、舍间和场中氨气(NH3)含量差异明显,夏季敞棚舍内NH3含量与舍间没有表现出显著差异,但有窗舍和半开敞舍内NH3含量远高于舍间和场中。冬季除了敞棚舍,其他牛舍内NH3含量远高于夏季,尤其3种密闭牛舍内NH3含量达到7.8～10.8mg/m3,而夏季只有0.92～0.95mg/m3,且检测高度1.2m的NH3含量显著高于0.6m;夏季各牛舍内外CO2含量均没有表现出显著差异,而冬季均超标(敞棚舍除外),尤其密闭牛舍CO2含量平均高达3 811mg/m3。

Evaluation of air quality inside and outside beef houses with different styles in Hebei province

This study was to investigate noxious gas inside and outside beef houses in summer and winter.Six styles of beef houses were used in various regions of Hebei province in this research program.Ammonia(NH3) concentration inside and outside the houses varied with different seasons and regions.Though the NH3 concentration inside open houses in summer wasn't different from the inter-space of two houses,the significant difference was observed among inside,inter-space of houses and the center of feedlots both in the closed house with window and semi-open front house.The NH3 concentration inside in winter was significantly higher than that of NH3 in summer except tor the open house,especially in three styles of closed houses,the NH3 concentration inside was higher with 7.8-10.8 mg/m3 in winter,compared to 0.92-0.95 mg/m3 in summer.Moreover,the NH3 concentration at the height of 1.2-meter was significantly higher than that of 0.6-meter height.The carbon dioxide(CO2) concentration was similar between inside and outside beef houses in summer,however,the CO2 concentration inside in winter exceeded the national criterion except for open houses,especially,the concentration in closed houses averaged 3 811 mg/m3.