| 摘要: |
| 为探索农牧交错带地区合理土地利用途径，以科尔沁左翼后旗为研究区，借助Envi和ArcGIS软件，利用同期遥感影像提取土地利用类型和土地沙漠化信息，根据研究区地形、土壤和水资源三大类型基础数据提取土地适宜性信息，通过分析土地沙漠化和适宜性情况进行土地利用优化。结果表明：研究区77.94%的土地受沙漠化影响，沙漠化程度由西北向东南区递减；3种土地利用类型的沙漠化状况受到其适宜性水平影响，适宜性越低则沙漠化可能性越高，耕地表现更为明显，耕地沙漠化多是开垦宜耕性较低的土地及粗放利用造成的，林地和草地的沙漠化则是低质量土地与过垦、过牧行为相互作用的结果；土地利用结构优化后，耕地面积减少2.80%，多位于生态较为脆弱的西北区域，林地和草地分别增加6.88%、16.02%，主要来源于未利用地的沙地。研究区半农半牧的土地利用方式使得耕地与林地和草地频繁转换，促使沙漠化进一步发展，为实现农牧交错带的可持续发展，土地利用优化应在生态恢复的同时促进畜牧业和种植业的平衡发展。 |
| 关键词: 农牧交错带 土地利用类型 沙漠化 土地适宜性 土地利用优化 内蒙古科尔沁左翼后旗 |
| DOI：10.11841/j.issn.1007-4333.2018.03.12 |
| 投稿时间：2017-01-12 |
| 基金项目:国土资源部公益性行业科研专项资金资助；内蒙古宜耕沙地保护性开发关键技术及示范（201411009） |
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| Optimization of land-use structure in the farming-grazing transitional zone based on desertification status and land adaptability: A case study of Horqin Left Wing Rear Banner,Inner Mongolia |
|
YANG Wei, XU Yan
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| (College of Resources and Environmental Sciences/Key Laboratory of Agricultural Land Quality, China Agricultural University, Beijing 100193, China) |
| Abstract: |
| The purpose of this study was to explore the way of reasonable utilization of land in the farming-grazing transitional zone.Land use types and land desertification information were extracted from the same period remote sensing images of Horqin Left Wing Rear Banner.The land suitability information was extracted from the basic data of topography,soil and water resources in the study area.Based on the analysis of land desertification and land suitability,the land use structure optimization by using GIS and RS was conducted.The results showed that the ratio of decertified land was 77.94% and the degree of desertification declined from northwest to southeast.The desertification and suitability status of cultivated land,forest land and grassland were significantly correlated:The lower the suitability,the higher the possibility of desertification.Among which,the cultivated land was the most representative.The reclamation of low suitability for cultivated land and extensive using of land was the reason of cultivated land desertification.Low quality land reclamation and overgrazing were the reasons of forest land and grassland desertification.Cultivated land in the ecological fragile areas decreased by 2.80%.Forest land and grassland developed from the sand land reclamation increased by 6.88% and 16.02% respectively.Researches on semi-the application method of grassland and semi-farmland leaded to frequent transformation between cultivated land and forest land,grassland,which promoted further development of desertification.In order to realize the sustainable development,the optimization of land use should support ecological recovery,and promote the balanced development of animal husbandry and planting industry at the same time. |
| Key words: farming-grazing transitional zone land use type desertification land suitability the land use structure Horqin Left Wing Rear Banner |
