The relation of groundwater level and distribution of Cynanchum komarovii Al. Iljnski indicate species of overgrazing in Mu Us sandy land in Inner Mongolia

Abstract

We investigated the relationship between groundwater level and distribution of Cynanchum komarovii in Musu sandy land. As a result, relative elevation at which C. komarovii was distributed ranged from 68 cm to 314 cm at this study area. The dry weight of C. komarovii was highest at the lower part of sand dune, where the relative elevation from groundwater level was 140 cm. The number of species was lower at the bottom of the sand dune than at other level. According to the groundwater level and the distribution depth of stem and root, it was thought that C. komarovii adjusted by extending the stem to sedimental sand, and grew while using underground water. We consider it could be suitable for use as a ground cover at sites affected by overgrazing in semi-arid land.