The Study On The Influences Of The Hedysarum Leave Sand Barriers To The Micro-climate And Vegetation Restoration

This article took the one-year-old, three-year-old and five-year-old Hedysarum leave sand barriers as the study object, adopting the parallel observation at the timing and fixed point observed the main meteorological factors of the different slope positions in the windward slope where were established sand barriers in Balinyouqi Horqin sandy ground, also surveying and analyzing the status of vegetation restoration in the sand barrier grids. The results showed that: 1.The influences of the Hedysarum leave barriers to the micro-climate were reduced the wind velocity; elevated the air temperature and the air relative humidity also could reduce diurnal temperature range. 2. The influences of the Hedysarum leave sand barriers to the micro-climate varied with the increasing growth yeas, the Hedysarum leave sand barriers gradually strengthened the regulation effects on the micro-climate with the growing of the Hedysarum leave sand barriers in the one to three (four)-old-year; and the effects would be weakened in the five year with the growth declination of the Hedysarum leave sand barriers.3. The cutting Hedysarum leave sand barriers could reduce the wind velocity in the autumn, and they would be alive in the next spring which were gradually strengthened the regulation effects on the micro-climate, so that created the favorable environment condition. 4. The influences of the Hedysarum leave sand barriers to the vegetation restoration were the plants species obviously had increased, the life form and family genus structure of plants had a tendency of diversification, also the extent of vegetation restoration were higher with the control time.5.The Hedysarum leave sand barriers in the different slope position had different effects on the micro-climate and vegetation restoration, so the Hedysarum leave sand barriers in the middle slope position had the most obvious improving effects, also in the Hedysarum leave sand barriers grids had the more plants species, the plant coverage was higher, which were beneficial to the vegetation restoration.