塔里木河上游灰叶胡杨克隆分株种群数量格局动态及其影响因素  

Dynamics and Its Affected Factors of Clonal Ramet Population of Populus pruinosa Schrenk in the Upper Reaches of the Tarim River

作　　者：郑亚琼[1] 赵正帅 李志军[1,2] 韩占江[1,2] Zheng Yaqiong;Zhao Zhengshuai;Li Zhijun;Han Zhanjiang(Key Laboratocy of Biological Resource Protection and Utilization of Tarim Basin,Xinjiang Production and Construction Group,Alar,Xinjiang 843300;College of Life Sciences,Tarim University,Alar,Xinjiang 843300)

机构地区：[1]新疆生产建设兵团塔里木盆地生物资源保护利用重点实验室,新疆阿拉尔843300 [2]塔里木大学生命科学学院,新疆阿拉尔843300

出　　处：《塔里木大学学报》2018年第3期15-23,共9页Journal of Tarim University

基　　金：国家自然科学基金项目(31260072);科技部973计划前期预研项目(2012CB723204)

摘　　要：采用点格局分析方法,应用偏离指数的t检验和Morisita指数的F检验,分析林缘、林内克隆分株种群密度及空间分布格局的动态变化。结果表明,在林缘、林内,克隆分株种群密度均呈现4~6月上旬迅速增大,随后保持不变。克隆分株种群分布格局在整个生长季呈聚集分布,集聚强度由4~6月的逐渐减弱至7~10月的基本保持不变,集聚强度受克隆分株种群密度的影响。种群密度与土壤水分含量、田间持水量、有机质、碱解氮含量及土壤孔隙度呈极显著/显著正相关,与土壤全盐含量、p H值以及土壤容重呈显著负相关。灰叶胡杨克隆分株种群数量格局的变化与生境土壤理化因子变化有关。A point pattern analysis method was employed with the t-test of the deviation index and F-test of Morisita index,the clonal ramet population and spatial distribution pattern were analysed,the ramet population density all increased rapidly starting in April,peaked in early June,and then remained relatively stable afterwards. The ramet populations displayed clumped distribution during the whole growing season. The aggregation intensity declined gradually from April to June and remained relatively stable from July to October and had affected with clonal ramet population. The ramet population density had significantly/significant positive correlation with soil water content,organic matter content,available nitrogen content and soil porosity. The results show that changes in the Populus pruinosa ramet population density had associated with changes of habitat soil physical and chemical factors.

关 键 词：灰叶胡杨 克隆分株 种群密度 空间分布格局 

分 类 号：S71[农业科学—林学]