植物篱种植模式综合效益研究

植物篱种植模式是一种有效的山区水土保持、土壤改良以及多种经营的耕作模式。该模式自20世纪70年代以来在热带非洲和东南亚等地区进行了试验、示范和较为系统的研究，作为坡耕地水土保持和土壤改良的生物措施受到广泛重视。20世纪80年代以来该模式在我国很多地区也进行了研究、示范和推广，并取得显著成效。本文在国内外已有研究基础上，采用层次分析法对四川省宁南县马桑坪的等高固氮植物篱种植模式的生态效益、经济效益、社会效益及综合效益进行了较为系统的分析和评价。评价结果表明，植物篱种植模式的生态效益、经济效益、社会效益及综合效益均大于顺坡耕作模式，种植新银合欢植物篱比种植山毛豆植物篱的综合效益高；在种植相同植物篱树种的前提下，施磷肥比不施磷肥的效果好。同时，针对该技术目前在研究和应用方面存在的问题提出了一些建议。

Comprehensive Benefits Assessment of Hedgerow Intercropping System

Hedgerow intercropping is an effective mode of agroforestry for soil and water conservation, soil fertility improvement and multi-purpose management of sloping lands in mountainous regions. Since earlier 1970s, hedgerow intereropping has been tested, demonstrated and studied in the tropic Africa, and Southeast Asia, which was attached more and more importance as a biological method for water-soil conservation and soil improvement of sloping farming lands. It also has been studied, demonstrated and disseminated resulting in significant results since 1980s in China. In this paper, based on the research home and abroad, the benefits of ecology, economy, society and their integration of contour hedgerow system of nitrogen-fixlng plants in Ningnan County of Sichuan have been analyzed and assessed systematically with analytical hierarchy process. The results indicate that the economic, ecological, social and comprehensive benefits of hedgerow intereropping are superior to that of traditional sloping cultivation. The comprehensive benefit of hedgerow intereropping of Leucaena leucocephala is better than that of Tephrosia candida. The results also indicate that application of superphosphate fertilizer for intercropping system improves crop yield and comprehensive benefits. Some suggestions on further studies and application are also presented.