文献类型：期刊文献

中文题名：毛乌素沙地天然臭柏种群年龄结构

英文题名：Age Structure of Natural Populations of Sabina vulgaris in the Mu Us Sandy Land

作者：王卓[1] 黄荣凤[2] 张国盛[3] 王林和[1]

第一作者：王卓

机构：[1]内蒙古农业大学生态环境学院;[2]中国林业科学研究院木材工业研究所国家林业局木材科学与技术重点实验室;[3]内蒙古农业大学林学院

年份：2009

期号：4

起止页码：548-554

中文期刊名：干旱区研究

外文期刊名：Arid Zone Research

收录：CSTPCD;;北大核心:【北大核心2008】；CSCD:【CSCD2011_2012】；

基金：科技部重大基础研究前期研究专项(2004CCA03000)

语种：中文

中文关键词：毛乌素沙地;臭柏(Sabina;vulgaris);种群;年龄结构;生境类型;植被恢复

外文关键词：Mu Us Sandy Land; Sabina vulgaris; population; age structure; habitat type; vegetation restoration;

分类号：Q948

摘要：以毛乌素沙地天然臭柏(Sabina vulgaris)种群为研究对象,按水分、地形等立地条件变化,将臭柏种群划分为滩地、沙丘底部、沙丘坡面和沙丘顶部4种生境类型进行实地调查,分析种群的年龄结构及其动态。运用WinDENDRO^(TM)年轮分析系统确定种群个体年龄,建立幼龄个体和成过熟个体的地径与年龄的回归方程,用以推算样地内所有个体的年龄。结果表明:滩地和沙丘底部生境下的臭柏种群10年以下幼龄植株占94%以上,其年龄结构图表现为金字塔型,属扩展种群;沙丘坡面生境下的臭柏种群以21～30年中龄植株为主,年龄结构表现为圆锥型,属稳定种群;沙丘顶部生境下的臭柏种群以51～60年成熟或老龄植株为主,年龄结构表现为倒金字塔型,属衰退种群。
In this study 4 habitat types（bottomland,bottom,slope and ridge of sand dunes）are classified for researching the age structure and its dynamic change of Sabina vulgaris populations based on the local conditions, such as the groundwater regime and terrain in Mu Us sandy land.The aim of the study is to determine how the different habitats affect the stability and development of S.vulgaris populations.The plant age is determined by measuring the number of growth rings with the WinDENDROTManalyzing system.Regression equations between the basal diameter and the age of S.vulgaris populations are developed for the selected young and mature plant samples,and then the equations are used for estimating the age of individuals across each plot based on measuring the basal diameters. The results show that the proportion of the younger-aged（less than 10 years）plants growing on the bottomland and the bottom of the sand dunes is as high as 94%of the populations,the age structure is in a typical pyramid pattern,and the populations are in an expansion.On the slope of the sand dunes,the age structure of the plants is cone-shaped,the middle-aged（21 to 30 years old）plants are dominant,and the populations are stable. On the ridge of sand dunes,the S.vulgaris populations are dominated by the mature and old plants（51 to 60 years old）,and the age structure of the populations is reverse-pyramid-shaped,indicating the typical ageing populations.