影响金城山淫羊藿生长主要环境因子

Research the Environmental Factor Impacting Longspur epimedium Growth in Jincheng Mountain

[目的]研究影响嘉陵江流域金城山森林公园淫羊藿生长的主要环境因子及其适宜范围,为建立农林复合体系、开发淫羊藿中药资源和加强淫羊藿野生资源保护提供一定的指导。[方法]根据回归方程中的因子标准化系数找到最主要的影响因子,在此基础上进行双因素相关性分析以判断它对淫羊藿生长的影响程度。随后,依据聚类分析结果,结合野外调查实际情况,在主要环境因子各段测量值范围上计算淫羊藿生态位,探讨最适宜淫羊藿生长的主要环境因子的数值范围。[结果]在金城山不同环境因子对淫羊藿生长影响强度为：土壤pH值〉海拔高度〉土壤深度〉土壤有机质〉相对光照〉土壤含水量;在5.73～5.83的pH值范围上,淫羊藿生态位宽度值最大。[结论]土壤pH值是影响嘉陵江流域金城山森林公园淫羊藿生长的主要环境因子,它会对淫羊藿的生长构成较大影响,其适宜的范围为5.73～5.83,在淫羊藿的栽培实践中应特别加以注意。

[Objective] The main environmental factors affecting the Longspur epimedium growth in the Jincheng Mountain Forest Park in Jialing River Basin and its appropriate growth region were studied for the guidance of the establishment of agro-forestry system,the development of traditional Chinese medicine resources and the protection of wildlife resource.[Method] According to the standardized coefficient of factor in regression equation,the most important impacting factor was found.Based on that,its influence degree to Longspur epimedium growth was determined with two-factor correlation analysis.Subsequently,the niche of Longspur epimedium in the range of measured value of main factor in different regions was calculated for the optimal the range of value of main environmental factor for Longspur epimedium growth,based on the results of cluster analysis and combined with field survey the actual situation.[Results] The intensity of the different environmental factors affecting the Longspur epimedium growth in the Jincheng Mountain was as follows： soil pH value 〉 altitude〉 soil depth 〉 soil organic matter 〉 relative illumination 〉 soil moisture.At the range of pH value of 5.73-5.83,there was the largest niche breadth of Longspur epimedium growth.[Conclusion] The pH value of soil was the major environmental factor impacting the Longspur epimedium growth in the Jincheng Mountain Forest Park in the Jialing River Basin and the appropriate range of pH value was 5.73-5.83.Thus,it should be paid particular attention to in cultivation practice.