马占相思工业原料林立木材积表的研建

基于广西工业原料林马占相思人工实生林385株测定样木,对其系列材积表进行建模和编制,并以另外126株样木作为检验。编制结果表明:二元立木材积表采用动态山本式拟合回归模型,相关紧密误差小。一元立木材积表采用了胸径与材积相关,地径与材积相关直接编制;同时,应用二元材积模型进行导算的间接编制。编表过程中拟合并优选了胸径对树高回归模型、胸径根径间回归模型,为其系列材积表的编制及应用创造了条件。通过初步的检验表明,材积表是适用可行的。

Construction of Tree Volume Tables on Acacia mangium Industrial Plantation

Based on Acacia mangium industriral raw material plantation in Guangxi,a series of volume tables have been modeling and compiled according to 385 modeling sample trees and another 126 for test.The result shows:(1)a standard volume table is compiled by selecting regression modle as V=aD~(f(D,H))H~(f(D,H)) with a height correlation efficient and less error;(2)a local volume table is established by the use of directive regression modle between stem volume and DBH,DBE respectively,and the guiding method also made by using the two way variable volume modle combining of tree height eqution;(3)some other regression modles such as tree height to DBH and DBH to DBE are applied to the process;(4)the initial tests indicate that volumes are applicable and reliable.