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针对以往土壤肥力质量综合评价方法存在人为权重赋值误差,以及简便计算等方面的不足的问题,提出了投影寻踪等级评价模型对土壤肥力质量进行综合评价。投影寻踪等级评价模型方法依据标准样本自身的数据特性寻求最佳投影方向,通过最佳投影方向与评价指标的线性投影得到投影指标值,依据投影指标值对样本进行统一评价和分类,并利用最佳投影方向判断各评价指标对综合评价目标的贡献大小。模型日的应用较好地对西藏米拉山区不同海拔土壤肥力质量进行评定,并对单一指标对土壤肥力质量贡献大小进行了分析,其结果将有助于西藏土壤的合理利用,为今后的土地利用分析决策提供重要参考。
Aiming at the problems of the error of evaluation of artificial weight and the shortcoming of simple calculation in the past comprehensive evaluation methods of soil fertility quality, the projection pursuit grade evaluation model is proposed to evaluate the soil fertility quality comprehensively. The projection pursuit level evaluation model method seeks the best projection direction according to the data characteristics of the standard sample itself, obtains the projection index value through the linear projection of the best projection direction and the evaluation index, and uniformly evaluates and classifies the samples according to the projection index value, The best projection direction to determine the contribution of each evaluation index to the comprehensive evaluation of the size. The application of model day was a good measure of soil fertility at different altitudes in Mount Mira in Tibet, and the contribution of single indicator to soil fertility quality was analyzed. The results will contribute to the rational utilization of soil in Tibet, Use analysis and decision-making to provide important reference.