The preliminary research of soil prolease on Khobqi sand area of Inner Mongolia

Colorimetry method of FolinCiocalteu was used to measure prolease activity of soil in different habitats of Khobqi sand area. The result showed that the seasonal change of soil prolease activity was summer＞spring＞fall＞winter on flow sandlot, the vertical variation was 10-20 cm＞2-5 cm＞5-10 cm＞0-2 cm.On the half fixed and fixed sandlot, the seasonal change of soil prolease activity was summer＞fall＞spring＞winter, the vertical variation was 0-2 cm＞2-5 cm＞5-10 cm＞10-20 cm. The soil prolease activity of no crust type was higher than the algea crust type on half fixed sandlot. The soil prolease activity of moss crust was higher than the algea crust and no crust sandlot on fixed sandy.