横断山区土地资源的农业利用评价

位处我国四川、云南、西藏三省(区)接壤的横断山区,为“世界屋脊”——青藏高原的东南部分,素以山高谷深、地质地理环境独特、生物与矿产资源丰富著称于世。其土地资源丰富,利用类型众多,但人口稀少、土地开发水平较低。清查与评价该山区各类土地资源的数量、质量与生产潜力,对其土地合理利用与经济振兴具有重要意义。本文仅就川西滇北横断山区的土地资源特征与农业利用评价原则等问题作一概述与探讨,供今后进一步工作之参考。

AGRICULTURAL EVALUATION OF LAND RESOURCES OF THE HENGDUAN MOUNTAINS REGION

The Hengduan mountains is a natural region with strongy dissected relief, and hence a series of virtical bioclimatic zones. Relatively speaking, the land resource is characterized by a series of land types with conspicuous areal differentiation, such as wide cold highland and steep land, land rich in resources suitable for forestry and animal husbandry, less suitable for cultivation and an instable ecology, etc., The agricultural evaluation of less resource and the rational development of land in the Hengduan Mountains should be mainly based on the natural ecology of land, the vertical zonality and, generally, the limitation of slope.According to the suitability and limitation of land for agriculture in the Hengduan Mountains, this paper suggests a land classification system including suitable order of land, suborder of land and class of land, and some relative factors of evaluation and their numerical appraisal indexes.