Change of soil nitrogen and physical property in different degradation stages of meadow on Wugong Mountain

This research took the meadow in Jiangxi Wugong Mountain as research object，analyzed the influences of different stages of degradation on soil total nitrogen，alkaline hydrolysis nitrogen and organic matter. The results showed that：（1）The soil total nitrogen，alkaline hydrolysis nitrogen and organic matter contents of meadow in Wugong Mountain increased first and then decreased with increase of degradation ，and was the higest in the lightly degraded stage，but was the lowest in severe degradation stage，and the degradation influence on nitrogen in upper layer soil was less than that in the lower soil，for organic matter，the upper layer soil was more than the lower soil.（2）With the increase of degradation，soil bulk density increased gradually but the soil quality and water content gradually decreased.（3）The severe degradation led to the loss of significant correlation among the nutritive indexes.