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模式W=b_1db~2(H—h)b~3(H/D)b~4是测定枝重或枝叶重所提出的.d表示枝条基径,H表示树高,h表示地面到枝条基部高度,D表示树的胸高直径,b_1、b_2、b_3、b_4是常数.这个模式及其变量在柏树(populus tristis~#Ⅰ)生物量研究中,对枝重的回归估算是有用的.在这样的应用中,发现这个模式的精度基本上比单独根据枝条直径的模式要高些,而且与林分密度或植距等项的模式相比,几乎同样精确.W=b_1db~2(H—h)b~3(H/D)b~4…………(5)W=b_1b~2(H—h)b~3Sb~4…………(6)在模式系数的估算中,树木或林分的枝重,可以重新测被量过的全部枝条数据中推导而得.
Mode W = b_1db ~ 2 (H-h) b ~ 3 (H / D) b ~ 4 is the proposed determination of branch weight or branch leaf weight. D stands for branch diameter, H stands for tree height, h stands for ground to branch base Height, D represents the diameter of the chest, b_1, b_2, b_3, b_4 are constants.This model and its variables are useful for regression estimation of branch weight in populus tristis ~ # Ⅰ biomass study. , The accuracy of this model was found to be substantially higher than the mode based solely on the diameter of shoots and almost as accurate as the modes of stand density or spacing etc. W = b_1db ~ 2 (H-h ) b ~ 3 (H / D) b ~ 4 (5) W = b_1b ~ 2 (H-h) b ~ 3Sb ~ 4 (6) The branches of the forest can be deduced from the data of all the branches measured.