Research Of Different Revegetation Models In Heihu Forest Farm In Western Qinling Forest Region

This article use the Black Tiger Forest Farm in the Western Qinling Forest Area,which is under the jurisdiction of Xiaolongshan Forest Experiment Bureau,as the research object.and studies the revegetation in the Black Tiger Forest Farm.The method this article used is based on the combination of theoretical analysis and practical work,through various methods such as experimental analysis,field observation and practice,research to evaluate the ecological effects of the area comprehensively,and at the same time,learning from the technical experience and theoretical methods obtained in other vegetation restoration areas,combined with the actual conditions of the area,summed up three suitable revegetation models for the Western Qinling forest area:sealing off mountainous areas for afforestation at Vegetation Restoration area,Shrubs Sand-Fixing(Hippophae rhamnoides Linn.)Afforestationatvegetationrestorationarea,Arborplanting(Larix principis-rupprechtii.)Afforestation at Vegetation Restoration Area,The results of ecological effect analysis of three vegetation restoration Areas are as followings:(1)After the implementation of closing mountains and forests revegetation model,the coverage,biomass,height,and density of the vegetation in the enclosed areas have been significantly improved.Evenness,richness index increased,ecological dominance decreased,community structure has been more complex,vegetation coverage overs 61%,biomass increased by 1000.2kg/hm~2,trees increased5.2m on average,air was humid,surface temperature and air temperature were better than the control ground,the soil is loose,the porosity is increased,and the soil nutrient content is abundant.(2)After the Shrubs shrub-fixing for(Hippophae rhamnoides Linn.)afforestation of revegetation model was implemented,the seabuckthorn forests growing up good and the survival rate reached 73%,the average height was about2.3m,the coverage rate was 63%,diversity species became abundant and vegetation density increased,the air became more moist and comfortable,improved previously dry microclimate,the soil becomes loose and soil bulk density decreases,the porosity increases,and the contents of total nitrogen,available phosphorus,organic matter,and available potassium increase significantly,and there is a significant difference with the control ground.(3)After the Arbor planting(Larix principis-rupprechtii.)afforestation revegetation model was implemented,the cover and biomass of larch forest reached19768kg/hm2,the average DBH was 1.2m,and average height was 18.6m,the survival rate became 83%,and 6 species of plants were increased compared with the control ground.The community structure has become more complex,and effectively improved the air temperature and surface temperature of the restoration site,increased the air humidity,and the overall ecological became more favorable to plants growth and development.(4)Established An index system,the cover land and forests surface temperature is 17.36?,air temperature is 16.20?,air humidity is 57.66?,soil organic matter is2.71g/kg,total nitrogen is 0.61g/kg,available phosphorus is 11.90mg/kg,and quick-acting potassium is 56.53mg/kg,the comprehensive ecological index was the best in the enclosed area.