Analysis Of Ecological Effect On Three Vegetation Restoration Model In Degraded Land In Zhuozi

The Inner Mongolia Autonomous Region is an important ecological barrier in northern China,is also one of the provinces of serious land degradation in China.Vegetation restoration technology is an important way to solve the land degradation.This study used the vegetation ecological survey method,comprehensive index method,ecological effect analysis of entropy method summarizes three kinds of typical vegetation in Zhuozi county and its recovery mode the construction of evaluation index system,evaluation of land degradation in the area of vegetation restoration for quantitative recovery,provide basic data and scientific basis for land degradation in arid and semi arid areas.The main conclusions are as follows:1.Shrub sandfixation forest model,Caragana grow well.Species richness,evenness and species diversity index increased,the dominance index reduced,the vegetation increased from 3 to 8.The surface roughness of 2.292cm increased,80cm reduced wind speed,+the wind proof efficiency by 21.18%increased to 38.16%.on climate control effect,surface temperature,air temperature has been effectively controlled,the air humidity increases.and the difference was significant(P<0.05).The soil bulk density,porosity.nutrient content increased significantly(P<0.05).2.Tree planting sand model,Pinus sylvestris growing well,the average height reached 2.4m,average diameter 36.3cm,average crown is 2.37*2.55m,the coverage of 60%,the survival rate of 75%.species diversity index were improved in different degree,species dominance decreased by forest vegetation simple become more complex,vegetation increased 6.The wind speed has been effectively controlled,200cm windbreak efficiency is 30.06%.and the surface air temperature and humidity effectively ease,significant difference(P<0.05).Soil bulk density decreased,the pore The effect of soil nutrient content increased obviously,and the difference was significant(P<0.05).3.Enclosure mode,Enclosure region vegetation coverage,biomass,height,density and other indexes were significantly improved.Evenness,richness index increased,the ecological dominance decreased.The community structure is more complex,vegetation increased to 6.The enclosure surface roughness increased by 2.111cm,200cm windbreak efficiency is 23.73%.the wind speed was controlled effectively.The surface air temperature and humidity,effectively alleviate the significant difference(P<0.05).Soil bulk density decreased,the porosity increased,soil nutrient contents increased,and the difference was significant(P<0.05).4.the establishment of the index system,the 4 indicators of the importance of the three mode element layer is the same;bushes to roughness(0.4752)is the most important;in the forest with the speed of the wind(0.4832)is the most important;enclosure with air humidity(0.4749)is the most important.The greater the weight coefficient,the greater the impact on the vegetation restoration process.The system showed that the selected index and mode area has a good correlation.