不同土地利用/土地覆盖方式下渭-库绿洲土壤养分评价研究

Study on Soil Nutrient Evaluation under Different Ways of Land Use/Cover in Delta Oasis of Weigan-Kuqa Rivers

为了解区域土地生态系统的演变规律和区域土地资源的合理利用、恢复治理以及生态环境的改善,以渭干河-库车河三角洲绿洲2013年Landsat 8 ETM+遥感影像和野外采样数据为数据源,在ENVI软件下进行土地利用/土地覆盖分类。并运用SPSS和DPS统计软件进行主成分分析和聚类分析,对研究区不同土地利用/土地覆盖方式下的土壤养分进行综合评价。结果表明,研究区耕地和林地的土壤养分综合水平显著高于草地和盐渍地,其中有机质、全氮、碱解氮和速效钾对综合评价土壤养分起到主要作用。通过了解研究区不同土地利用/覆盖方式下的土壤养分差异,可为区域土地资源的合理开发利用提供依据。

In order to restore and improve ecological environment for the rational use of regional land ecological system,understand the evolution and the regional land resource,Weigan-Kuqa River Delta Oasis in 2013 Landsat 8 ETM＋remote sensing images and field sampling data were taken as data source,land use / land cover classification in ENVI software. And the statistics software SPSS and DPS on principal component analysis and cluster analysis of different land use / land cover were used in the studied area under the way of a comprehensive evaluation of soil nutrients,the results showed that： The overall significant level of soil nutrients of farmland and woodland were above the grass and salted in the study area,in which organic matter,total nitrogen and potassium on the comprehensive evaluation of soil nutrients played a major role. Learning the differences in soil nutrient under the different ways of land use / cover of study area could provide the basis for rational development and utilization of land resources.