Comparative analysis of air environment in three kinds of goat houses in summer in Southern China

In the hot summer, the structure of goat house and stocking density are the key factors affecting the goat house micro-climate conditions. In order to correctly evaluate the goat types and reasonable design of stocking density, this study examined the air parameters of three goat houses, which were double slope airtight type goat house with windows and slatted floor, single slope semi-open type goat house with slatted floor and mobile goat house. This mobile goat house was designed by our research group independently. The results showed that some indicators of mobile goat house were significantly lower than those of double slope airtight type goat house with windows and slatted floor and single slope semi-open type goat house with slatted floor, such as average temperature, relative humidity and ammonia concentration(P0.01). Carbon dioxide concentration in mobile goat house was significantly lower than that in other houses(P0.05). Compared with double slope airtight type goat house with windows and slatted floor, the air temperature of single slope semi-open type goat house with slatted floor was a little lower, but the relative humidity was higher(P0.05), and ammonia concentration was lowe(rP0.01). When the rearing density decreased by one time(0.95 head·m-2), relative humidity and ammonia concentration of double slope airtight type goat house with windows and slatted floor were greatly lower(P0.01), and air temperature and carbon dioxide concentration were also lower. With the decrease of the feeding density, air temperature, relative humidity, ammonia concentration and carbon dioxide concentration significantly decreased in single slope semi-open type goat house with slatted floor(P0.01). The results indicate that the micro-climate environment of mobile goat house is significantly better than that of double slope airtight type goat house with windows and slatted floor and single slope semi-open type goat house with slatted floor in summer.Both semi-open goat house and airtight goat house with windows have their own advantages and disadvantages,and reducing stocking density can significantly improve their micro-climate environment in summer.