黄土高原沟坡地土地生产力评价的指标体系与评价方法

通过对渭北黄土高原地区沟坡地土壤理化性质的分析和对当地社会经济状况的调查研究,应用层次分析法对沟坡地土地自然生产力和现实生产力进行了分析和评价.在分析过程中,把当地主要造林树种根系垂直分布特征及其根系抗旱性特性纳入了分析评价体系.结果表明,嘴头村和西坡村不同树种沟坡地上刺槐(Robinia pseudoacacia)的自然生产力属于中等稍微偏上水平,而山杏(Prunus armeniacia var. ansu)、油松(Pinus tabulaeformis)和侧柏(Platycladus orientalis)的自然生产力水平则较低.两地沟坡地上的现实生产力计算结果则证明刺槐和山杏两个树种表现出了较高的水平,具有较好的发展前途;而油松和侧柏的现实生产力水平则较低,其发展推广受到了限制.群众对沟坡开发治理的态度和对开发方案的认可对沟坡开发的成功起到了重要作用.

The index system and method for soil productivity evaluation on the slope land in the Loess Plateau

Based on the investigation of the soil physical and chemical properties from the slope and the local scio-economicalconditions, the analytical hierarchy process (AHP) was applied to evaluate the current soil productivity (CSP) and natural soi1productivity (NSP) of the slope land, in which the root distribution characters and root drought-resistance ability was considered. Theresults indicated that the NSP of the Robinia pseudoacacia in the two villages were above the middle, whi1e the NSP of Prunusarmeniacia var.ansu, Pinus tabulaeformis Platycladus orientalis was low.And the CSP of the Robinia pseudoacacia and Prunusarmeniacia var.ansu were higher than the other two which were worthy of popularized, and the attitude and the recognition of theloca1 people toward the slope development was of great importance to the success of the slope development.