Land Use/Cover Changes and Environmental Consequences in Songnen Plain,Northeast China

查看全文 作　　者：LIU [1]Dianwei;WANG [1]Zongming;SONG [1]Kaishan;ZHANG [1]Bai;HU [2]Liangjun;HUANG [1]Ni;ZHANG [1]Sumei;LUO [1]Ling;ZHANG [1]Chunhua;JIANG [1]Guangjia

机构地区：[1]Northeast Institute of Geography and Agroecology, Chinese Academy of Sciences, Changchun 130012, China;[2]KeyLaboratory for Vegetation Ecology of Ministry of Education, Northeast Normal University, Changchun 130024, China

出　　处：《Chinese Geographical Science》索引2009年第19卷第4期,共7页

基　　金：Under the auspices of Knowledge Innovation Programs of Chinese Academy of Sciences (No KZCX2-YW-341);National Natural Science Foundation of China (No 40871187) 摘　　要：The Songnen Plain in Northeast China,one of the key national bases of agricultural production,went through remarkable land use/cover changes in recent years.This study aimed to explore the long-term land use/cover changes and the effects of these changes on the environment.The Landsat-based analysis showed that,during 1986-2000,cropland,built-up land and barren land had increased,among which cropland had the largest increase of 9,198km2 with an increase rate of 7.5%.Woodland,grassland,water body and swampland had decreased correspondingly,among which grassland had the most dramatic decrease of 6,127km2 with a decrease rate of 25.6%.The transition matrix results revealed that grassland,woodland and swampland were the three main land use types converted to cropland.Climate warming created the potential environment for the conversion of grassland and swampland into cropland.Land resources policy made by central and provincial governments of China affected the pattern and intensity of land use.Land use/cover changes accompanied by climatic variation brought out a series of environmental consequences,such as sand desertification of land,land salinization and alkalinization,grassland degradation,and more frequent floods.Under this circumstance,optimized land use structure and restoration measures are needed. 关键词：土地利用/覆盖变化中国东北松嫩平原环境土地盐碱化草原退化土地利用结构土地使用

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Land Use/Cover Changes and Environmental Consequences in Songnen Plain,Northeast China

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