杨树一元立木材积表的编制研究.pdfVIP

, 2008, 35( 4) : 486489 Journal of Anhui AgriculturalUn ivers ity 2 2 2 周 旭 , 杜传奇, 唐雪海 , 陈龙勇 ( , 230036; 2 , 230036) : 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 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 = 0000 4 3d2446 3; 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- 075% 455% 和 62% 该材积误差满足林业生产材积估算误 差要求 : 杨树; 一元材积表; 编制 : S75862 : A : 672352X( 2008) C om p iling of oneva riable volum e table of stand ing tim ber of pop lar tree 2 2 2 ZHOU Xu , DU Chuanqi, TANG Xuehai, CHEN Longyong ( Enrollment and Emp loym ent O ffice, Anhu iAgricu lturalUn iversity, H efei 230036; 2School of Forestry and Landscape A rchitecture, Anhui Agricu lturalUn iversity, H efei 230036) Abs tract: The data for establish ing stem volume table of pop lar tree w ere collected from 329 w ood samples of the poplar tree plantations inAnhui Province. Based on the information of 300w ood samp les, the param eters, the re main ing standard deviation, relevant indexes of onevariable volume model w ere calculated by nonlinear equations M aiKuate computation. A ccording to the relevant indexes and the residual standard deviation, onevariable volume 2446 3 model of the poplar tree w as given. The best onevariable volum emodel isV = 0000 4 3d . The average rel ative error, the average absolutely relative error and systematic error of the b inary volume table w ere calcu lated based on the 29 w ood samp les, and the resu lts are - 075% , 455% and 62% resp