Study on the microclimate of sheep-raising house in winter in pasturing area of northern ecotone

The microclim ate of the sheep-raising house in the northern ecotone was observed in winter．The results show that the surface temperatures in unheated houses are -2．5～0℃．It raises tO 11℃ that is higher than that in the sheep pen and outside during 20．00 P．m～8．00 a．m at the level of 0．3m ．The air temperature in the house is -2℃ which is 10C higher than that in the sheep pen and outside and the rdative humidity in it is 58％ ．The air temperature in the unheated sheep-raising house with an enlarged density can reach tO 0℃ at the level of 1．5m and the relative humidity in it is 65％．