灰叶胡杨种群空间分布格局与动态研究  

Spatial Distribution Pattern and Dynamics of Major Population of Populus pruinosa

作　　者：马丽亚[1] 席琳乔[1] 景春梅[1] 单康峰 韩路[2] 马春晖[1,3] 

机构地区：[1]塔里木大学动物科学学院/新疆生产建设兵团塔里木畜牧科技重点实验室,新疆阿拉尔843300 [2]塔里木大学植物科学学院,新疆阿拉尔843300 [3]石河子大学动物科技学院,新疆石河子832000

出　　处：《新疆农业科学》2014年第5期935-940,共6页Xinjiang Agricultural Sciences

基　　金：“973”计划前期研究项目(2012CB426507)

摘　　要：【目的】通过6种聚集度指标研究叶尔羌河下游灰叶胡杨(Populus pruinosa)种群空间分布格局和动态。【方法】在新疆叶尔羌河下游阿瓦提县境内天然灰杨林内设置50 m×50 m样地4个,应用相邻格子法进行调查测定。【结果】灰叶胡杨林内物种贫乏、生物多样性低,灰叶胡杨密度较低,其种群龄级结构呈中部大、两端小的正态分布,幼苗较少,中树个体丰富,属稳定型种群。【结论】灰叶胡杨种群空间分布格局符合聚集分布,在不同的发育阶段聚集强度不同,幼树、小树为聚集分布,中树阶段为随机分布,至大树阶段转向聚集分布,种群龄级结构为稳定型种群。[ Objective] This research focuses on the spatial distribution pattern and dynamics of major populations in P. pruinosa forest in the lower reaches of Yarkant River through six kinds of aggregate indices. [ Method ] 50 m x 50 m plots were established in natural Populus pruinosa forest in the lower reaches of Yarkant River in Awati County of Xinjiang Uygur Autonomous Region, where the vegetation was investigated and determined by contiguous grid quadrate method. [ Result] When the species and biodiversity were poor, the density of P. pruinosa was lower. The population age structure of P. pruinosa showed that its middle was large and both ends were small, that is to say, the middle -aged trees were rich in size with a few seedlings, belonging to a stable type. [ Conclusion] The population space distribution pattern of P. pruinosa conformed to aggregated distribution. The aggregation intensity was different during different developmental stages. When the trees was small, the distribution of sapling manifested as aggregated type, and it changed to randomized type during median tree stage. But when the trees grew up, the distribution type turned to be aggregated type again. The population age structure of P. pruinosa population was a stable type.

关 键 词：灰叶胡杨 空间分布格局 聚集强度 

分 类 号：S792.119.03[农业科学—林木遗传育种]