Study on the Evaluation of Cultivated Land Suitabilty Based on Sustainable Use the Basin of Jinsha River in Yunnan Province
【摘要】 云南金沙江流域是我国生态环境建设的重中之重的区域 .其耕地资源的最大特征是以坡耕地为主、陡坡耕地占相当比重 ,这是导致该流域水土流失特别严重、生态环境日益恶化的最重要原因 ,因而防治该流域水土流失、建设良好生态环境的首要对策措施是合理地开发利用和整治耕地资源 .文中以土地资源详查成果为基础 ,通过选取 10项评价指标 ,采用“极限条件法”与“综合分析法”相结合的评价方法 ,对云南金沙江流域现有全部耕地进行了基于可持续利用的适宜性评价 ,得出了全流域各县 (市、区 )高度适宜 (一等耕地 )、中度适宜 (二等耕地 )、低度适宜 (三等耕地 )和不适宜 (宜退耕地 ) 4个等级耕地的数量、分布和特征 ,为该流域耕地资源的合理开发利用和整治提供了科学依据 .其研究尤其对当前西部大开发战略中的陡坡耕地退耕还林还草工程有着特别重要的科学指导意义 .
【Abstract】 The basin of Jinsha river in Yunnan province is a very important region of the construction of ecological environment in our country.The main characteristics of cultivated land in the basin are sloping cultivated land constituted a main part of all cultivated land,and the area of steep cultivated land in the slope of >25°occupied a considerable proportion in total cultivated land area.This is the most main causes for the especially serious soil erosion and the increasingly bad ecological environment in the basin,and so the rational exploitation and management of cultivated land resources should be the most important countermeasure for preventing and controlling soil erosion and constructing good ecological environment.Taking the achievement of detailed investigation of land resources as a basis,and using the way of combining the method of limit conditions and the synthetic analytical method on the basis of selecting 10 indexes of cultivated land evaluation,the author in the paper evaluated the suitability of all cultivated land based on sustainable use in the basin of Jinsha river in yunnan province, and obtained the quantity,distribution and characteristics of four suitability classes of cultivated land (that are the land suited highly to the cultivation or first class farmland,the land suited middlingly to cultivation or second class farmland,the land suited lowly to cultivation or third class farmland and the land not suited to cultivation) in the basin,and so the paper has provided scientific basis for the rational exploitation and management of cultivated land resources of the basin.This study is of great importance to direct scientifically the project of taking land out of farming use and giving back to forestry and grass use in the strategy of big development of the western China.
【Key words】 cultivated land； sustainable use； suitability； evaluation； the basin of Jinsha river；
- 【文献出处】 云南大学学报(自然科学版) ,Journal of Yunnan University (Natural Sciences) , 编辑部邮箱 ,2001年04期