了哥王叶功能性状特征及其对土壤因子的响应

为探究了哥王Wikstroemiaindica的叶功能性状特征及其影响因素，在海岛植被调查的基础上对了哥王叶片进行取样并测定其功能性状指标，利用变异系数法和Pearson相关性分析探讨叶功能性状之间的差异与联系，运用冗余分析研究了哥王叶功能性状对土壤因子的响应。结果表明，了哥王的叶功能性状变异系数介于9.76%～23.73%，其中叶体积变异幅度最大(23.73%)，叶干物质含量变异幅度最小(9.76%)，整体上了哥王叶功能性状保持相对稳定。了哥王各项叶功能性状之间具有一定的相关性，联系较密切。了哥王叶功能性状主要受土壤中有机质、全氮、碱解氮的影响，土壤中有机质、全氮、碱解氮的含量与比叶面积呈正比，与叶厚度、叶体积成反比。了哥王的叶片可以通过一定的性状变异和组合来适应外部环境的变化，以较好地适应海岛恶劣的环境。该研究结果可为了哥王野生种质资源的保护、利用以及人工栽培提供参考。

Characterization of Leaf Functional Traits of Wikstroemia indica and Its Responses to Soil Factors

In order to explore the characteristics and influencing factors of leaf functional traits of Wikstroemia indica, based on the island vegetation investigation, the leaves of W. indica were sampled and their functional trait indexes were determined. The difference and relationship between leaf functional traits were explored by coefficient of variation method and Pearson correlation analysis, and the response of leaf functional traits of W. indica to soil factors was explored by redundancy analysis. The results showed that the variation coefficient of leaf functional traits of W. indica was from 9.76% to 23.73%, among which the variation degree of leaf volume was the largest (23.73%) and the variation degree of leaf dry matter content was the smallest (9.76%). On the whole, the leaf functional traits of W. indica remained relatively stable. The leaf function traits of W. indica were closely related to each other. The leaf functional characteristics of W. indica were mainly affected by organic matter, total nitrogen and alkaline hydrolyzable nitrogen in the soil. The organic matter, total nitrogen and alkaline hydrolyzable nitrogen in the soil were in direct proportion to the specific leaf area and in inverse proportion to the leaf thickness and leaf volume. The leaves of W. indica can adapt to the changes of external environment through certain character variation and combination to better adapt to the harsh environment of the island. The research results can provide reference for the protection and utilization of wild germplasm resources of W. indica and artificial cultivation.