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通过对广西黄冕林场7年生黑荆树(Acacia mearnsii De Willd.)人工林林分进行每木检尺和生物量进行测定,建立了黑荆树各器官生物量与胸径(D)、树高(H)及D2 H的相关关系,分别用幂函数等3种模型对黑荆树人工林单株生物量进行拟合。结果表明:慢生和中生类型各组分生物量分配比率大小顺序为干>皮>枝>叶>根,速生类型各组分生物量分配比率大小顺序为干>枝>皮>叶>根;黑荆树各器官生物量及全株生物量与D2 H的相关关系最为显著;各器官生物量的拟合方程拟合效果都较好,所选择的回归模型分别为:树干WS=187.689 9(D2 H)1.099 2、树枝Wb=71.786 1(D2 H)1.593 6、树皮Wtb=36.306 7(D2 H)1.025 8、树叶Wl=4.439 1e-8H7.337 8、树根Wr=e0.248 1+3.359 6D2H和Wr=1.281 6×28.777 1D2H的拟合效果相同、全株生物量Wt=313.978 3(D2 H)1.1237。
The biomass and DBH of each Acacia mearnsii De Willd. Plantation were determined by measuring woody biomass and DBH, and the tree height (H) and D2 H, and fitted with 3 models respectively, such as power function, to fit the biomass of A. acuminata plantation. The results showed that the order of biomass allocation rate was dry> skin> branch> leaf> root. The order of biomass allocation rate of fast-growing type was dry> shoot> bark> leaf> root ; The correlation between D2 H and the biomass of all organs and the biomass of all plants were the most significant. The fits of the fitting equations for biomass of all organs were good, and the regression models were as follows: trunk WS = 187.689 9 (D2 H) 1.099 2, Branch Wb = 71.786 1 (D2 H) 1.593 6, Bark Wtb = 36.306 7 (D2 H) 1.025 8, Leaf Wl = 4.439 1e-8H7.337 8, Roots Wr = e0.248 1 + 3.359 6D2H and Wr = 1.281 6 × 28.777 1D2H, the whole plant biomass Wt = 313.978 3 (D2 H) 1.1237.