| 摘要: |
| 为科学评价自然-人类活动综合作用下陈巴尔虎旗土地生态状况并更好地反映其空间异质性，以像元为评估单元，构建涵盖土地利用类型、植被覆盖度、土壤湿度、裸土指数、土壤亮度五项遥感参量的土地生态状况评价模型（LEI模型），揭示呼伦贝尔草原核心区——陈巴尔虎旗土地生态状况的空间差异，分析其主要限制因子，进而提出相对应的土地生态调控途径。结果表明：1）空间上陈巴尔虎旗土地生态状况从东北向西南逐渐变差。2）时间上陈巴尔虎旗2000-2010年土地生态状况整体有变差趋势，土地生态状况处于"一般"的区域面积由65.75%增加到69.75%，"变差"和"变好"的区域面积比重分别为12.59%和5.19%，且东部比西部的土地生态恶化进程更快。3）土地利用类型和植被覆盖度是影响研究区土地生态状况的主要限制因子。 |
| 关键词: 土地生态状况 遥感参量 综合评估 限制因子 |
| DOI：10.11841/j.issn.1007-4333.2019.11.18 |
| 分类号: |
| 基金项目:"十三五"国家重点研发计划（2016YFC0501101-4）；国家自然科学基金资助项目（41501564） |
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| Evaluation of land ecological conditions and analysis of influencing factors in Chen Barag Banner |
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DENG Xiaojuan, LI Jing, YIN Shouqiang, SUN Ziyun, CUI Lvyuan, YAN Xiaoxiao, WANG Yuan
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College of Geoscience and Surveying Engineering, China University of Mining and Technology(Beijing), Beijing 100083, China
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| Abstract: |
| In order to scientifically evaluate the land ecological status under the combined action of natural and human activities and better reflect its spatial heterogeneity,this study takes pixel as evaluation unit and constructs a land ecological status evaluation model (LEI model) that covers five remote sensing parameters including land use type,vegetation coverage,soil moisture,bare soil index and soil brightness.The spatial differences of land ecological status in Chen Barag Banner,the core area of Hulunbuir grassland are investigated,and the main limiting factors are analyzed,the corresponding ways of land ecological regulation are then put forwarded.The results show that:The land ecological status of Chen Barag Banner is gradually deteriorating from northeast to southwest spatially,and the overall land ecological status of Chen Barag Tiger Banner displays a trend of deterioration from 2000 to 2010.The area of land ecological status in "general" has increased from 65.75% to 69.75%,and the proportion of "deteriorated" and "improved" areas has increased 12.59% and 5.19% respectively,and the deterioration process of land ecology in the East is faster than that in the west.The land use type and vegetation coverage are the main limiting factors affecting the land ecology in the study area. |
| Key words: land ecosystem status remote sensing parameters synthetic assessment limiting factor |
