杨树一元立木材积表的编制研究

Compiling of one-variable volume table of standing timber of poplar tree

以安徽省杨树人工林为研究对象,按照立木材积表编制要求,随机抽取329棵杨树伐倒木材积资料。以300棵样木资料为编表样本,选用3种数学模型为一元材积的候选模型,利用非线性麦夸特迭代求解法确定各模型参数、剩余标准差、相关指数。根据相关指数和剩余标准差,确定最优一元材积模型为:V=0.0001413d2.4463;以29棵样木资料为验表样本,分别计算一元材积模型理论材积与实际材积的平均相对误差、平均绝对相对误差和系统误差,计算结果分别为-0.75%、14.55%和1.62%。该材积误差满足林业生产材积估算误差要求。

The data for establishing stem volume table of poplar tree were collected from 329 wood samples of the poplar tree plantations in Anhui Province.Based on the information of 300 wood samples,the parameters,the remaining standard deviation,relevant indexes of one-variable volume model were calculated by nonlinear equations Mai Kuate computation.According to the relevant indexes and the residual standard deviation,one-variable volume model of the poplar tree was given.The best one-variable volume model is V=0.0001413d2.4463.The average relative error,the average Absolutely relative error and systematic error of the binary volume table were calculated based on the 29 wood samples,and the results are-0.75%,14.55% and 1.62% respectively.Each error of the volume table satisfies with the need of forestry.