Evaluation And Dynamic Analysis On The Vegetation Recovery Mode In Hulunbeir's Desertified Grassland

In order to restore vegetation in Hulunbeir's desertified grassland,this research study on the parts below.the comparison of three different recovery techniques,the evaluation of artificial planting vegetation in different periods,the interspecific niche relations of artificial sand-fixation plants.The conclusion as following:After using three different recovery techniques,the vegetation community structure and soil physical and chemical indicators have increased significantly.The best mode of recovery technique is plant Agropyron pectinatum (Bieb.)Beauv+Hedysarum laeve Maxim+Caragana microphylla Lam.+Triticum aestivuml L.in checkboard belt settled in enclosure desertified grassland.In the different periods(1a,3a,4a,5a), the vegetation community structure and soil physical and chemical indicators have increased significantly under this mode. Agropyron Pectinnatum (Bieb.)Beauv was the dominance species in the improvement of desertified grassland in this area.The study on the niche overlaps showed that,between A pectinatum and H. leave,T.aestivuml and C.microphylla have strong competitive capacities in community succession; But the niche overlaps between nature resume plants and artificial seeding plants weren't high, the gradual appearance of Cl.Squarrosa and St.grandis indicated the community of this area were developing to a stably co-exist artificial-nature state.