刺槐与环境因子相关性的缩元递阶矢量分析  

Reducing variable hierarchical vector analysis of correlations between Robinia pseudocacia and environmental factors

作　　者：赵丽英[1] 宋玉伟[1] 杨建伟[1,2] 杜敏华[1] 杜瑞卿[1] 

机构地区：[1]南阳师范学院生命科学与技术学院,河南南阳473061 [2]中国科学院水利部水土保持研究所,陕西杨凌712100

出　　处：《生态学报》2009年第8期4147-4156,共10页Acta Ecologica Sinica

基　　金：国家自然科学基金资助项目(90302005);中国科学院知识创新基金资助项目(KZCX1-06)

摘　　要：为了研究环境因子对刺槐综合影响,揭示其重要影响因子,研究设置了水分适宜、干旱、严重干旱3种不同生境,从环境因子——刺槐生理变化——刺槐生长状况3个层次采用多个指标进行了实验观测。根据实验结果,利用缩元递阶矢量分析法对层与层间的关系进行分析。分析结果表明:土壤有效供水量和温度是两个重要的因子。在水分适宜的条件下,环境因子对叶水势和WUE有一定的影响,对其它生理指标没有明显影响,刺槐基本上不受环境因子的制约,能够按自身生理发展。但随着干旱加重,环境因子对刺槐的影响加重,刺槐的生理变化受环境因子的制约。在干旱、严重干旱的条件下,光合速率,蒸腾速率,WUE是3个重要指标,生理变化对枝条生长有制约性。刺槐在生长季内的生物总量明显下降,土壤水分对刺槐的生长、成活有重要影响。由此得出:刺槐的生长与土壤水分、土壤有效供水量、温度等环境因子关系密切,种植刺槐时要注意它的生存环境,特别是土壤的水分含量。缩元递阶矢量分析法是一种值得应用的好方法。In order to investigate relations between Robinia pseudocacia and environmental factors and find out the important influencing factors,we obtained data of growth of R.pseudocacia under three soil water conditions,that is favorable,medium drought and serious drought soil water condition,which respectively hold about 70%-80%,50%-60% and 30%-40% of field water capacity and we also employ indicators from three levels —environmental factors,physical changes,and the growth situation to test and observe.The data was analyzed in a Hierarchical vector way.The results showed that the soil effective supplying water and temperature played important roles in this process.When the water content changed from favorable to medium drought or to serious drought,the influence of the environmental factors（including water,temperature etc.） on potentials leaf water and water use efficiency（WUE） was deepened gradually,but other physiology has no obvious changes.While photosynthetic rate,transpiration rate and WUE of R..pseudocacia were inhibited seriously.The total biomass of R.pseudocacia decreased remarkably.Water content of soil affects the survival and growth of R.pseudocacia obviously.In conclusion,the growth of R.pseudocacia has close relation to water content of soil,effective supplying water of soil and temperature etc.Therefore,our result approved reducing function hierarchical vector analysis is a reasonable method.

关 键 词：缩元递阶矢量分析法 刺槐 环境因子 相关性 

分 类 号：S792.27[农业科学—林木遗传育种]