摘要
以西北农牧交错带典型区域甘肃环县为研究对象,基于2007、2012、2017年和2022年4期土地利用现状数据,在分析土地利用时空变化的基础上,进一步探究区域生态环境质量指数及生态贡献率变化情况,阐明土地利用变化与生态环境质量之间的相关性。结果表明,环县土地利用面积变化表现为“一减五增”的趋势,仅草地面积减少,其余地类面积均呈增长态势,其中林地面积增幅最大;土地利用变化类型为草地、林地、耕地和建设用地四大地类之间的相互转化,草地转化为耕地对该区域生态恶化的效应最大,草地转化为林地对生态改善的贡献最大,因此,应科学合理规划确定土地利用用途,在保护耕地的基础上,充分发挥草地和林地的正面生态环境效应。
This study took Huanxian County of Gansu Province,a typical area of the northwest agro-pastoral ecotone,as the research object.Based on the land use status data of four periods in 2007,2012,2017 and 2022,and on the basis of analyzing the temporal and spatial changes of land use,this study further explored the changes of regional eco-environmental quality index and ecological contribution rate.The correlation between land use change and ecological environment quality was expounded.The results showed that the change of land use area in Huanxian County showed a trend of“one decrease and five increases”.The area of grassland decreased,the areas other five land types increased,in which the area of forest land increased the most.The types of land use change were the mutual transformation among grassland,forest land,cultivated land and construction land.The conversion of grassland to cultivated land had the greatest effect on the ecological deterioration of the region,and the conversion of grassland to forest land had the greatest contribution to the ecological improvement.Therefore,land use should be scientifically and reasonably planned and determined on the basis of protecting cultivated land to give full play of the positive ecological and environmental effects of grassland and forest land.
作者
黄彦宁
叶得明
HUANG Yanning;YE Deming(Gansu Agricultural University,Lanzhou 730070,Gansu,China;Huan County Bureau of Natural Resources,Qingyang 745000,Gansu,China)
出处
《西北林学院学报》
CSCD
北大核心
2024年第5期195-201,共7页
Journal of Northwest Forestry University
基金
甘肃省社科规划项目(19YB127)。
关键词
西北农牧交错带
土地利用
生态环境效应
生态贡献率
环县
northwest agro-pastoral belt
land use
ecological environmental effect
ecological contribution rate
Huanxian County