Experimental Study Of Soil Moisture And Heat Regimes Under Different Surface Conditions During Seasonal Freezing-Thawing Period

Freezing and thawing of soil moisture is accompanied with a series of physical processes in seasonal freezing-thawing areas, such as moisture transfer and heat exchange. On the basis of consulting to a number of literatures both at home and abroad, and combining with the project of "The study of transfer and conversion laws of unsaturated soil moisture under different surface conditions during seasonal freezing-thawing period", which is founded by the NSFC, the laws of soil moisture and heat regimes under different surface treatments in frozen soil have been analyzed by field experiments and indoor experiments. The surface treatments can be concluded bare plot(LD), plastic film mulching(MD), straw mulching(JD), sown pasture(CD), the plot which has been overlay ed by natural snow(XD) and winter wheat plot(XMD). The main conclusions are as follows:...