【摘要】 研究目的:西部耕地资源在我国占有重要地位,研究西部耕地质量及其空间分布,对提升西部乃至我国耕地质量管理水平具有重要意义.研究方法:运用产量水平引导法划分耕地地力等级和质量类型,编绘西部耕地地力等级分布图并讨论其空间分布特征.研究结果:地力等级为1,2等的耕地仅占西部的1.12%,3,4等地占西部耕地的8.92%,5,6等地占西部的17.36%,7,8等地占西部的29.78%,9,10等地占西部的42.81%.研究结论:西部省区的耕地地力等级齐全,形成"三分好地、七分差地"的地力结构格局;西部省区的耕地地力等级呈现大交错分布,形成质优耕地集中西南地区、西南地区集中四川的空间分布格局.更多还原

【Abstract】 The cultivated land resources in West China play an important role in our country.It is of great significance to improve the management of cultivated land for West China to research the quality and spatial distribution in West China.The division of the grades of cultivated land fertility and quality type are based on the yield of grain in West China.Regard the administrative county as the basic unit of statistics.By means of the ARCGIS platform the compilation of cultivated land fertility grade distribution map of West China was accomplished.The characteristics of spatial distribution have been discussed.The results show that the share of the first and second grades of the cultivated land accounts only for 1.12%in West China;the third and fourth grades of the cultivated land for 8.92%;the fifth and sixth grades of the cultivated land for 17.36%;the seventh and eighth grades of the cultivated land for 29.78%;and the percent of ninth and tenth grades of the cultivated land for 42.81%.It is concluded that the cultivated land fertility grade is complete.The arable land quality formation is described that three tenths is fertile farmland and seven tenths barren in West China.The level of cultivated land fertility of western provinces presents a large staggered distribution.In terms of space distribution,the fertilizer cultivated lands are concentrated in Southwest China,and in Sichuan Province of Southwest China was found highly centralized pattern.更多还原