Study Status and Trends of Vegetation Restoration of Dry-hot Valley in Southwest China
Dry-hot valleys are mainly distributed in the upper and middle reaches of Yangtze River,Red River,Nu River,Lancang River,etc.They are typical ecologically fragile areas in Southwest China,with hot and dry climate,sparse vegetation,dryand barren soil,and serious water and soil erosion.Vegetation restoration and ecological improvement there are extremely difficult.This paper reviewed the history of vegetation restoration in dry-hot valleys,and made systematic analysis of the evolution process of the existing vegetation,approaches and methods to restore vegetation,research on plant stress adaptation and protection mechanism as well as the selection and introduction of suitable tree species,vegetation restoration and cultivation utilization of specialty resource.Based on the successes and failures of the research and practices of vegetation restoration in decades,the paper systematically made a comparative analysis of revegetation in dry-hot valleys,the paper described the research status and development trend ofvegetation restoration in the dry and hot valleys.It was proposed to accelerate the building of green security barrier along the upper reach of Yangtze River to ensure the achievement of sustainable economic and social development as well as the double increase goal in dry-hot valley region and the river basin in there.
NETL
NSTL
万方数据
维普
