摘要
基于MODIS归一化植被指数数据,采用转移矩阵和线性回归模型等方法,对2001—2013年山西高原植被活动进行了研究,并结合土地利用覆盖数据、气象数据和统计数据,从土地利用变化、农业生产和植被建设三方面定量分析了人类活动对植被覆盖变化的影响.结果表明,13年来,土地利用变化的平均面积为24 151.29km2,占山西高原总面积的15.8%,土地利用变化引起的年INDV的平均变化占山西高原年INDV变化的16.1%.农业生产对未变耕地区域年INDV的贡献率约80%,进一步研究表明施肥和灌溉等农业生产活动对农作物产量的贡献率约为82.1%.植被建设对未变林地区域年INDV和未变草地区域年INDV的贡献率分别为87%,85%,植被建设对林地未变区域年INDV的贡献随海拔升高越来越大,植被建设对低度带草地未变区域年INDV比中度带区域的贡献大.
This paper investigated the vegetation cover variations on the Shanxi Plateau based on MODIS normal difference vegetation index（I NDV ）from 2001 to 2013 using transition matrix and liner regression methods.The influence of human activities on vegetation cover variations are also analyzed from three aspects：land use change,agricultural production,and vegetation construction,based on land use data, meteorological data,and statistical data.Results show that during 13 years,the average area of land use change is 24 15 1.29 km2 , accounting for 15.8% of the total area on Shanxi Plateau. The average variations in I NDV caused by land use change is accounted for 1 6.1%.The contribution of agricultural production to annual I NDV is about 80% in the unchanged area of cropland.Fertilization and irrigation plays an important role in the output of crops, and the contribution is 82.1%. The contributions of vegetation construction to annual I NDV are about 87% and 85% in unchanged area of woodland and grassland,respectively.The contribution of vegetation construction to annual I NDV in unchanged area of woodland is increased with increasing altitude.The contribution of vegetation construction to annual I NDV in low altitude area of grassland is larger than the middle altitude area.
出处
《西北师范大学学报（自然科学版）》
CAS
北大核心
2016年第6期118-124,共7页
Journal of Northwest Normal University(Natural Science)
基金
山西省青年科技研究基金资助项目(2013021030-1)
山西省高等学校创新人才支持计划资助项目
关键词
INDV
植被活动
土地利用变化
农业生产
植被建设
INDV
vegetalion activity： land use change
agricultural production： vegetation construction
