黄土丘陵沟壑区土地利用类型与土地生产力关系模拟研究——以王家沟小流域为例

Simulation on Relations between Land Use Type and Land Productivity in Loess Hilly Region—A case study in Wangjiagou catchment

土地利用是人类对自然界影响的最主要方式,而土地利用类型则是影响土地生产力状况的关键因素。利用基于侵蚀条件下的土地生产力模型,研究黄土高原丘陵沟壑区不同土地利用类型与土地生产力之间的关系。结果表明,对于大多数的作物类型而言,土地生产力状况均表现为坝地>梯田>坡耕地>沟坡地。进一步研究了不同作物类型对土地利用的适宜性指数和生产力指数,均表现出相同的趋势。

The land use type is a pivotal factor affecting land productivity m loess hilly region. Using the land productivity model based on erosion, supported by geographic information system （GIS）, the paper researched the relation between different land use types and land productivity of hilly loess region. The result showed, to a majority of crops, land productivity of different land use types has a law, namely, bottomland 〉 terrace 〉 slope land 〉 gully wall. In order to research the mechanism further, the paper discussed adaptability index and productivity index of different kinds of crop for different land use types, which embodied the same trends.