基于AHP法研究半干旱地区4种乡土植物混播组合的护坡效果

Study on Slope Protection Effects of Sowing Combined of Four Native Grasses in Semi-Arid Area Based on AHP Method

摘要: 为更有效准确筛选出4种乡土植物在半干旱地区哈素海环湖路边坡混播建植护坡植被的最佳组合混播模式，本文利用Yaahp软件采用层次分析法(Analytic Hierarchy Process，简称AHP)，通过建立数学分析模型和评价体系，对15种混播组合处理建植的2年(2013-2014)护坡植被，依据护坡效果所测试的16项指标进行了系统综合定量分析。结果表明，11个混播组合处理与4个单播对照总计15个处理中，综合得分最高的组合是无芒雀麦(Bromus inermis Leyss)、冰草(Agropyrom cristatum (L.) Gaertn.)、披碱草(Elymus dahuricus Turcz.)、老芒麦(Elymus sibiricus L.) 4种植物等比例混播的组合模式，其密度、成坪速度、综合抗逆性、越冬率、盖度、地上生物量、地下生物量、根体积这些与护坡效果密切、综合权重较高的影响因素相应的分值也是各处理中最高或者较高的，由此证实该混播模式为该地区护坡植被建植中的最佳混播组合模式。

Abstract: For seeking the best mixed-sowing mode of four native plants in the semi-arid area of the Hasuhai road slope, Analytic Hierarchy Process (AHP) was conducted by Yaahp software to establish mathematical analysis model and evaluation system. Based on the functions and effects of slope protection, 16 testing parameters were determined and analyzed for 15 cropping patterns of two- year old (2013-2014) slope protection vegetation. The results show that the mixed-sowing mode (1:1:1:1) of Smooth brome (Bromus inermis Leyss), Crested wheatgrass (Agropyrom cristatum (L.) Gaertn), Dahuria wild ryegrass (Elymus dahuricus Turcz.) and Siberian wild rye grass (Elymus sibiricus L.) was obtained the highest score among the 15 cropping patterns (11 mixed-sowing modes and 4 single-sowing modes). The density, perennial velocity, integrated stress tolerance, overwintering rate, coverage, aboveground biomass, underground biomass and root volume were closely related to slope protection effects, and the scores of influencing factors with high compre-hensive weights were also the highest or higher. It has proved that the mixed-sowing was the best sowing pattern in slope protection vegetation construction in this area.