黄土高原旱地果园径流集水技术经济分析

该文通过对黄土高原旱地果园经不同处理后的集流面相关的经济指标对比分析后认为：对面积为3 m×4 m、3 m×3 m的坡面进行有机硅喷涂和压实拍光处理均是提高黄土高原旱地果园经济效益的有效方式。对面积为3 m×4 m的坡面进行有机硅喷涂处理,效益最好，其9年（从造林至结果）的净现值为37 060.28元/hm²，其产出投入比最高；对面积为3 m×3 m的坡面进行有机硅喷涂，效益其次,其9年的净现值为30 408.72元/hm²；对面积为3 m×4 m的坡面进行压实拍光处理后，9年的净现值为25 198.68元/hm²。在所有处理中,对面积为3 m×3 m的坡面进行压实拍光处理的效果最差，9年的净现值为21 233.32元/hm²，但产出投入比仍较高,为4.52∶1。

Economic Analysis on Runoff Catchment in Orchards of Arid and Semi-arid Area on Loess Plateau

By contrasts and analyses of economic indexes on the periods of investment recovery，net present value(NPV)，the rate of input-output，the internal rate of return on different disposed catchment surfaces in orchards of arid and semi-arid area on Loess Plateau, some conclusions are made as follows:① Slopes disposed by organic silicon(YGJ) with the density of 3　m×4　m，3　m×3　m and taped slopes with the density of 3　m×4　m，3　m×3　m are available methods to improve the economic results in orchards of arid and semi-arid area on Loess Plateau.② Slopes disposed by organic silicon with the density of 3　m×4　m have the best benefit and the highest NPV, which is 37 060.28 yuan/hm². Its rate of input-output is the highest of all. While the NPV of slopes disposed by organic silicon with the density of 3　m×3　m is 30 408.72 yuan/hm². The NPV of taped slopes with the density of 3　m×4　m is 25 198.68 yuan/hm². The NPV of taped slopes with the density of 3　m×3　m is 21 233.32 yuan/hm². Its rate of input-output is 4.52∶1. The order is YGJ 3 m×4 m >YGJ 3 m×3 m >taped 3 m×4 m >taped 3 m×3 m.