棉花土地适宜性评价指标体系研究与应用——以农八师石河子总场为例

Research on and Application of the ndex System of Land Suitability Evaluation for Cotton A Case Study in Shihezi General Farm

结合新疆独特的气候土壤条件，以棉花为评价目标，建立了棉花土地适宜性评价指标体系。以石河子总场为试验区，借助该区土地信息系统选取了８个直接指标和７个综合指标，利用评价指标体系对直接指标进行量化，采用极限法和综合指数法相结合的评价模型，利用计算机完成了该区棉花土地适宜性评价。在确定直接指标权重过程中引进了一种新兴的数学分析方法——投影寻踪回归技术。实践证明，所建立的指标体系具有一定的科学性和实用价值。

By studying the unique climatic and soil conditions in Xinjiang, a land suitability evaluation index system for cotton was established. With the aid of local LIS (Land Information System) data base, eight direct indexes and seven integrated indexes were selected. The direct index was quantified according to the evaluation index system. Then an evaluation model which combined the limiting method and the composite index method was set up. By using this model with the aid of computers, a land suitability evaluation for cotten in Shihezi General Farm was conducted. While determining the direct index weight, a kind of new mathematical analysis methodprojection pursuit regression techniquewas used. It has been proved that the index system is of scientific and practical value.