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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 carbon content of various components of 18-year-old poplar I-72 in the Antenna of the Yangtze River in Anqing, Anhui Province was analyzed in detail. The results showed that there was no significant difference in the carbon content of dry, bark, branch and leaf with the sampling site. At the same time, the correlation between the crown characteristics and carbon storage per plant was studied. The results showed that: 1) the average crown width was correlated with the quadratic quadratic correlation of plant carbon accumulation; 2) The regression equation was: y = 104.5e ~ (0.056 9x), R ~ 2 = 0.361 2; 3) The carbon accumulation was exponentially correlated with D ~ 2H and the regression model was y = 88.522 (D ~ 2H) ~ (0.997 5) , R ~ 2 = 0.945; 4) The leaf dry weight and leaf area per plant were linearly correlated with the carbon accumulation, R 2> 0.7. The regression models were y = 7.892x + 94.247, y = 0.809 4x + 77.69. In the crown, diameter and other factors, the use of DBH, tree height, leaf area, leaf dry weight, etc. to estimate the amount of carbon accumulation with high accuracy.