喀斯特高原与峡谷的土地利用对比——以贵州清镇和花江为例

喀斯特高原和峡谷的土地利用在气候、地质地貌、土壤等自然背景下进行的对比,和土地利用现状及其空间结构的对比分析,表明了高原区农业生态环境优于峡谷区、水土流失弱于峡谷区,两示范区耕地面积差别不大、结构明显不同,并对各种土地利用类型分布的集中分散程度分析对比、土地利用结构的匀质性和土地开发利用程度的情况进行分析对比。文中运用了景观生态学中的斑块密度来表示土地利用类型密度,反应每一种土地利用类型分布的破碎程度。

A comparison of present land-use between karst tableland areas and karst gorge areas--With examples from Qingzhen and Huajiang of Guizhou

The contrast is couducted for land use in the natural background of climate, physiognomy, landforms, soil, etc. The analysis is done on land - use type and the spatial structure of land use in karst tableland areas and karst gorge areas, which proves that the plateau agroecology environment is superior to gorge area and gorge superior to plateau on soil erosion intensity. The two demonstration areas on land use have few differences, but the structure is obviously different. The centralization and decentralization of the distribution of land - use type are analyzed and compared on the development and used extent of land. A comparison of land - use structure equilibrium is made,too. The article uses the patch density in landscape ecology to show the density of land - use type, and reflect the broken degree of every land use type distribution.