塔里木河下游天然胡杨林碳储量及其分配特征  

Carbon storage and allocation characteristics of natural Populus euphratica forests in the lower Tarim River

作　　者：买尔哈巴·吾买尔 塔依尔江·艾山[1,2] 玉米提·哈力克[1,2] 王慧娟[1,2] 王娜 蒋文[1,2] WUMAIER Maierhaba;AISHAN Tayierjiang;HALIKÜmut;WANG Huijuan;WANG Na;JIANG Wen(College of Ecology and Environment,Xinjiang University,Urumqi,Xinjiang 830046,China;Ministry of Education Key Laboratory of Oasis Ecology,Urumqi,Xinjiang 830046,China)

机构地区：[1]新疆大学生态与环境学院,新疆乌鲁木齐830046 [2]新疆维吾尔自治区绿洲生态教育部重点实验室,新疆乌鲁木齐830046

出　　处：《森林与环境学报》2023年第4期363-370,共8页Journal of Forest and Environment

基　　金：国家自然科学基金项目“塔里木河流域胡杨干材腐朽的定量诊断及驱动机制探析”(32160367)。

摘　　要：为探讨不同河道距离下胡杨的林分结构、碳储量及其分配特征,以塔里木河下游的胡杨林为研究对象,采用生物量异速生长模型,基于4块100 m×100 m的标准样地定位监测数据,估算其地上、地下生物量及碳储量。结果表明:研究区胡杨树高为2~12 m,胸径为10~95 cm,随着河道距离的增大,胸径的增长速度比树高的增长速度快,即胡杨林在水平方向上变化更明显;257株胡杨的单株碳储量值为3.07~551.44 kg·株^(-1),单株胡杨不同器官碳储量变化表现为:树干>枝条>根系>叶片,其中,树干碳储量占主体地位;地上碳储量和地下碳储量分别为2.15~493.83和0.915~7.01 kg·株^(-1),根冠比为2.35~8.57。随着河道距离的增大,胡杨老龄化趋势明显,样地内大树占比增加。从河道距离来看,胡杨不同器官的碳储量随着河道距离的增大而增大;其中,树干的变化最大,叶片的变化最小;离河道距离最近的1号样方内胡杨各器官碳储量的分布相对集中;离河道距离最远的4号样方内胡杨各器官碳储量的离散程度最高;随着河道距离的增大,胡杨整株碳储量、地上碳储量、地下碳储量呈增加趋势。胡杨碳储量表现出随离河道距离的增大而增加的大树效应。The structure,carbon storage,and distribution characteristics of Populus euphratica stands in the lower reaches of the Tarim River were investigated.Based on monitoring data from four standard sample plots of 100 m×100 m,a biomass anisotropic growth model was used to estimate the above⁃and below⁃ground biomass and carbon storage of trees at different distances from the river.The results showed that the height of P.euphratica stands in the study area grew faster at breast height than at breast height.The height of P.euphratica trees in the study area ranged from 2 to 12 m,and the diameter at breast height(DBH)ranged from 10 to 95 cm.With the increase of river distance,the growth rate of diameter at breast height is faster than the growth rate of tree height,i.e.the change of poplar forest is more obvious in the horizontal direction;the individual carbon stock values of 257 poplar plants range from 3.07 to 551.44 kg·plant-1,and the change of carbon stock of different organs of single poplar plants is shown as follows:trunk>branch>root system>leaf,among which,trunk carbon stock is dominant.The above⁃and below⁃ground carbon stocks ranged from 2.15 to 493.83 kg·plant^(-1)and 0.915 to 7.01 kg·plant^(-1),respectively,and the root⁃to⁃crown ratio ranged from 2.35 to 8.57.As the distance from the river increased,there was an obvious trend of P.euphratica aging,and the proportion of large trees in the sample site increased.The carbon stocks of different P.euphratica organs increased with increasing distance from the river;among them,the change in trunk carbon stocks was the largest,and the change in leaf carbon stocks was the smallest.In the four sample plots,the distribution of carbon stocks of different P.euphratica organs was relatively concentrated in sample plot 1,which was closest to the river.In contrast,sample plot 4 had the highest dispersion farthest from the river.Whole,above⁃ground,and below⁃ground P.euphratica carbon stocks increased as the distance from the river increased.P.euphratica carb

关 键 词：胡杨 塔里木河 异速生长模型 碳储量 生物量 分配格局 

分 类 号：S718.45[农业科学—林学]