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| 基于改进PSR模型的长株潭地区土地生态系统健康评价研究 |
| Studies on Land Ecosystem Health Evaluation in Chang Zhu Tan Region Based on the Improved PSR Model |
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| DOI： |
| 中文关键词: 土地生态系统健康评价 组合赋权法 改进PSR模型 长株潭地区 |
| 英文关键词: Land ecosystem health evaluation Combination weighting method Improved PSR model Chang Zhu Tan region |
| 基金项目:湖南省自然科学基金资助项目（2019JJ70013）；湖南省教育厅科研基金资助项目（18C1801）；湖南省生态环境厅环保科研基金资助项目（2019-12）；湖南省社会科学成果评审委员会课题基金资助项目（XSP19YBC297）；湖南省自然资源调查与监测工程技术研究中心开放课题基金资助项目（2020-14） |
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| 中文摘要: |
| 基于改进的PSR模型构建土地生态系统健康评价指标体系，运用组合赋权法确定指标权重，对长株潭地区及其各县（市、区）的土地生态系统健康进行定量分析和评价。研究表明：2002—2014年，长株潭地区土地生态系统健康综合指数由5002下降至4132，呈波动下降趋势，主要影响因素为单位耕地农药施用量、单位耕地化肥施用量、水土流失比率、森林覆盖率、环保投资额占GDP比例、封山育林及当年造林面积。该地区15个县（市、区）的土地生态系统健康状况呈现明显的时空差异，1个属于综合指数快速上升区，6个属于基本稳定区，7个属于慢速下降区，1个属于快速下降区。 |
| 英文摘要: |
| In this study, the evaluation index system of land ecosystem health was established based on improved PSR model for quantitative analysis and the evaluation of land ecosystem health in Chang Zhu Tan region. The weight of the indexes were determined by combination weighting method. From 2002 to 2014, the comprehensive index of land ecosystem health in Chang Zhu Tan region decreased from 50.02 to 41.32, showing a fluctuating downward trend. The main effective factors were pesticide application rate per unit cultivated land, fertilizer application rate per unit cultivated land, soil erosion rate, forest coverage, proportion of investment in environmental protection to GDP, closed forest area and afforestation area in current year. The land ecosystem health in 15 counties (city, district)in this area had obvious temporal and spatial differences. The comprehensive index was rapidly rising in one county, basically stable in six counties, slowly falling in seven countries and quickly reducing in one country. |
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