Ⅰ-72杨树冠特性与碳蓄积量的相关性  

Correlation of crown characteristics and carbon storage of Ⅰ-72 Populus

作　　者：刘杏娥[1] 江泽慧[1] 王妍[2] 

机构地区：[1]国际竹藤网络中心,北京100102 [2]中国林业科学研究院木材工业研究所,北京100091

出　　处：《干旱区地理》2009年第2期183-187,共5页Arid Land Geography

基　　金：国家林业局948项目(2006-4-16);国家林业局“星火计划”项目:杨树雄性优良品系在城市林业中的应用与示范

摘　　要：详细分析了安徽安庆长江外滩地18年生Ⅰ-72杨树各组分含碳率,认为单株的干、皮、枝、叶含碳率随取样部位的变化差异不显著。同时研究了树冠特性与单株碳蓄积量的相关性,结果表明:1)平均冠幅与单株碳蓄积量呈一元二次方相关;2)单株碳蓄积量与冠长呈指数相关,回归方程为:y=104.5e^(0.056 9x),R^2=0.361 2;3)碳蓄积量与D^2H呈幂相关,回归模型为y=88.522 (D^2H)^(0.997 5),R^2=0.945;4)单株叶干重、叶面积均与碳蓄积量呈一次线性相关,R^2>0.7,回归模型分别为:y=7.892x+94.247;y=0.809 4x+77.69。在冠幅、胸径等因子中,利用胸径、树高、叶面积、叶干重等来估算碳蓄积量具有较高的精度。The paper analyzed the carbon content of different part of popular I - 72 in lower reaches of Yangtz River in LOWER Anqing, Anhui Province, and studied the correlation of the crown characteristics and carbon storage of single tree. The results showed as follow ： （ 1 ） the relationship of average crown diameter and carbon storage of single tree was linear correlation ; （2） the relationship of carbon storage of single tree and crown tall accorded with the model of exponential correlation ,and the equation was y = 104.5 e^0.0569x ,R^2 =0. 361 2 ; （3） the relationship of carbon storage of single tree and D2H accorded with the model of power correlation, and the equation was y = 88. 522 （D^2H）0.9975 ,R^2 =0. 945; （4） the relationships of leaf dry weight and leaf area of single tree and carbon storage were linear correlation, R^2 〉 0.7, the.equations were y = 7. 892x ＋ 94.247 and y = 0.809 4x ＋ 77.69, respectively.

关 键 词：含碳率 树冠特性 碳蓄积 相关性 

分 类 号：S718.5[农业科学—林学]