A sand-accumulation belt came into being during the process of desert control in recent 60 years at the edge of oasis,especially at the upwind places in desert area in Hexi Corridor of Gansu.Among them,the sand-accumu...A sand-accumulation belt came into being during the process of desert control in recent 60 years at the edge of oasis,especially at the upwind places in desert area in Hexi Corridor of Gansu.Among them,the sand-accumulation belt at the edge of Minqin Oasis is relatively typical and the most complete.The vegetation on the sand-accumulation belt is not only the formation factor of the sand-accumulation belt,but also an important factor to maintain the stability of the sand-accumulation belt.In a certain sense,the health status of the vegetation of the sand-accumulation belt determines the stability of the sand-accumulation belt.In order to analyze the vegetation status of the sand-accumulation belt,the health sequence analysis of the plant community was carried out of sand-accumulation belt at the edge of Minqin Oasis,by setting 11 lines of equal spacing of sand-accumulation belt at the edge of Minqin Oasis,and through the vegetation survey of more than 60 samples.The vegetation on the sand-accumulation belt at the edge of Minqin Oasis is generally unhealthy.But for the health sequence of this study,the health status of vegetation of the sand-accumulation belt formed by artificial sand fixation forest is better than that of vegetation of the sand-accumulation belt formed by natural shrub at the edge of Minqin Oasis.The health status of vegetation of the sand-accumulation belt of mixed forest of arbor and shrub is the worst at the edge of Minqin Oasis.The dominant species Tamarix laxa on the sand-accumulation belt in the lower reaches of the oasis are seriously withered,and their health is the worst.There is potential danger of the sand-accumulation belt being blown and activated.After abandonment of farmland,protection of protection forest and sand-accumulation belt at the edge of farmland in sand area is a new problem,which is worth considering.展开更多
基金Sponsored by the National Natural Science Foundation of China(41661064)。
文摘A sand-accumulation belt came into being during the process of desert control in recent 60 years at the edge of oasis,especially at the upwind places in desert area in Hexi Corridor of Gansu.Among them,the sand-accumulation belt at the edge of Minqin Oasis is relatively typical and the most complete.The vegetation on the sand-accumulation belt is not only the formation factor of the sand-accumulation belt,but also an important factor to maintain the stability of the sand-accumulation belt.In a certain sense,the health status of the vegetation of the sand-accumulation belt determines the stability of the sand-accumulation belt.In order to analyze the vegetation status of the sand-accumulation belt,the health sequence analysis of the plant community was carried out of sand-accumulation belt at the edge of Minqin Oasis,by setting 11 lines of equal spacing of sand-accumulation belt at the edge of Minqin Oasis,and through the vegetation survey of more than 60 samples.The vegetation on the sand-accumulation belt at the edge of Minqin Oasis is generally unhealthy.But for the health sequence of this study,the health status of vegetation of the sand-accumulation belt formed by artificial sand fixation forest is better than that of vegetation of the sand-accumulation belt formed by natural shrub at the edge of Minqin Oasis.The health status of vegetation of the sand-accumulation belt of mixed forest of arbor and shrub is the worst at the edge of Minqin Oasis.The dominant species Tamarix laxa on the sand-accumulation belt in the lower reaches of the oasis are seriously withered,and their health is the worst.There is potential danger of the sand-accumulation belt being blown and activated.After abandonment of farmland,protection of protection forest and sand-accumulation belt at the edge of farmland in sand area is a new problem,which is worth considering.
