Impacts of artificially planted vegetation on the ecological restoration of movable sand dunes in the Mugetan Desert,northeastern Qinghai-Tibet Plateau  

作　　者：Yanfu Li Zhiwei Li Zhaoyin Wang Wenlong Wang Yanhong Jia Shimin Tian 

机构地区：[1]Nanjing Hydraulic Research Institute,State Key Laboratory of Hydrology-Water Resources and Hydraulic Engineering [2]School of Hydraulic Engineering,Changsha University of Science &Technology,Key Laboratory of Water Sediment Sciences and Water Disaster Prevention of Hunan Province [3]State Key Laboratory of Hydroscience and Engineering,Tsinghua University [4]Institute of Soil and Water Conservation,Chinese Academy of Sciences,Northwest Sci-Tech University of Agriculture and Forestry [5]East China Normal University [6]Key Laboratory of Yellow River Sediment,MWR,Institute of Hydraulic Research,YRCC

出　　处：《International Journal of Sediment Research》2017年第2期277-287,共11页国际泥沙研究（英文版）

基　　金：supported by the National Natural Science Foundation of China(51309154,91547112,51409114);the Open Research Program of Yellow Sediment Key Laboratory of the Ministry of Water Resources of China (2017005);the National Key R & D Plan of Ministry of Science and Technology of China(2016YFC0401401);the Research Foundation of the Education Department of Hunan Province(16B010)

摘　　要：Controlling desertification is an important ecological target for the Qinghai-Tibet Plateau of China, where studies on impacts of vegetation restoration measures on sandy soil improvement are still lacking, The Mugetan Desert in Guinan County, Qinghai Province, northeastern Qinghai-Tibet Plateau is a repre- sentative ecological restoration area. The impacts of artificial vegetation on the ecological restoration and its properties are studied by using field investigation and sample testing including contents of the surface layer and the vegetation composition of movable, semi-fixed, and fixed sand dunes. Results demonstrate that the moss crust has formed on the surface of a sand dune which has become fixed after 30 years under the impact of artificial vegetation （i.e. Cathay poplar）. Meanwhile, the clay minerals, organic matter, and other soil available nutrients have markedly increased. A correlation has been found between these materials, i.e., clay minerals and organic matter content increasing with silt and clay increases with reduction in sand content. In addition, soil nutrient were positively correlated with the increase of plant diversity.Under the current meteorological conditions, the artificial vegetation is helpful for the stabili- zation of sand dune and the ecological restoration in the Mugetan Desert.Controlling desertification is an important ecological target for the Qinghai-Tibet Plateau of China, where studies on impacts of vegetation restoration measures on sandy soil improvement are still lacking, The Mugetan Desert in Guinan County, Qinghai Province, northeastern Qinghai-Tibet Plateau is a repre- sentative ecological restoration area. The impacts of artificial vegetation on the ecological restoration and its properties are studied by using field investigation and sample testing including contents of the surface layer and the vegetation composition of movable, semi-fixed, and fixed sand dunes. Results demonstrate that the moss crust has formed on the surface of a sand dune which has become fixed after 30 years under the impact of artificial vegetation （i.e. Cathay poplar）. Meanwhile, the clay minerals, organic matter, and other soil available nutrients have markedly increased. A correlation has been found between these materials, i.e., clay minerals and organic matter content increasing with silt and clay increases with reduction in sand content. In addition, soil nutrient were positively correlated with the increase of plant diversity.Under the current meteorological conditions, the artificial vegetation is helpful for the stabili- zation of sand dune and the ecological restoration in the Mugetan Desert.

关 键 词：Desertification Sand dune Artificial vegetation Ecological restoration Biological crusting layer Soil available nutrients 

分 类 号：Q948[生物学—植物学]