科尔沁沙地农牧交错区典型村域土地利用现状及动态变化分析——以敖汉旗母子山村为例

科尔沁沙地农牧交错区生态环境脆弱，土地利用不合理。以生态环境、人口和经济上具有典型性的母子山村为依托．根据遥感影像解译数据及实地调查数据，从微观角度对村域土地利用现状及动态变化进行定量分析。研究表明近17年母子山村耕地面积呈波动变化，由1988年的836．53hm^2增加到2000年的1011．01hm^2．2005年耕地面积降为651.23hm^2：牧草地面积呈减少趋势，由1988年的1437．15hm^2降到2005年的675．8259hm^2；草地覆盖度降低，高覆盖度草地1988年占草地面积的13．58％，2005年降为0；森林覆盖率呈快速增长的趋势，比重由1988年的17．6％上升到2005年的53．1％；沙漠化土地面积锐减．比重由1988年的13％降到3％。母子山近17年中，土地利用程度变化指数为9．35，人类改变土地的程度在增强．人与土地的关系越来越紧密，土地利用的程度由低级另，1向高级别转变。其原因主要是人口和牲畜的变化及国家政策的调整的结果。

Analysis on the Status Quo and dynamic Change of Horqin Sandy Land in the Semi-arid Agro-pastoral Interweaving belt-Taking the Muzishan Village of AoHan as an Example

Horqin sandy land, with fragile environment and unreasonable type of land use, lies in the semiarid agro-pastoral interweaving belt. Under the data of remote sensing and investigation support, the paper taking the typical village, Muzishan village as an example, analysed on the status quo and dynamic state of the landuse from point of microcosmic view. Studies show that the area of cultivated land in the study area was fluctuated in the past 17 years, which increased from 836.53hm^2 to 1011.01 hm^2 during 1988 to 2000 and decreased to 651.23hm^2 in 2005. Grassland reduced from 1437.15 hm^2 to 675.8259 hm^2 and forest land increased quickly, which account 17.6% to 53.1% from 1988 to 2005. The desertified land has sharply reduced from 13% to 3%. The index of landuse degree of the study area is 9.35, showing an increasing trend of the influencing from human activity. The reasons account for the changes are increasing population, deterioration of environment and adjustment of the country.