内蒙古锡林浩特市达布希勒图草场荒漠化程度评价

Evaluation on the Desertification Degree in Dabuxiletu Grassland,Xilinhaote,Inner Mongolia

本文在实地测量达布希勒图草场2004年的植被盖度、裸沙占地百分比和土壤质地的基础上,利用高尚武(1998年)提出的荒漠化评价指标体系对当地的荒漠化程度进行了评价,为当地荒漠化防治工程的合理布局提供了科学依据。评价结果表明:整个达布希勒图草场均发生了不同程度的沙质荒漠化,荒漠化程度以中度为主;封育后围栏内的荒漠化程度比围栏外降低;围栏内由东向西荒漠化程度逐渐增强;草场内植被盖度大于41%的地段为轻度荒漠化,植被盖度小于41%的地段为中度或强度荒漠化。

On the basis of measuring vegetation coverage, percent of naked sand and soil character in Dabuxiletu Grassland in 2004, the paper evaluated the local desertification degree by use of the desertification evaluation index system proposed by Gao Shangwu（1998） and provided scientific base for the reasonable distribution of local desertification - combating project. The result of evaluation showed. most of Dabuxiletu grassland is medium degree of desertification; desertification degree inside fence after closing is lower than that outside the fence; desertification degree inside the fence increase gradually from east to west; light desertification takes place in the area which coverage of vegetation was more than 41%, medium and severe desertification takes place in the area which coverage of vegetation was lower than 41%.