基于毛竹胸径和秆高对竹材产量估算模型的构建

摘要

Determination was made on DBH, height and weight of fell 5- and 7-year Phyllostachys heterocycla cv. pubescens. Multivariate linear equations were established as Y1= 8.336X1+2.882X2-70.954 (regression coefficient = 0.933), Y2 = 8.613X1+2.670X2-69.310 (regression coefficient=0.9820), in which X1=DBH,X2=height,Y1=weight of 5-year culm, and Y2=weight of 7-year culm.%以毛竹（Phyllostachys heterocycla cv. pubescens）为研究对象，通过测定3度毛竹、4度毛竹砍伐后的胸径、秆高和秆重等因子，建立毛竹胸径、秆高与秆重的多元线性方程：Y1=8.336X1＋2.882X2－70.954（模型的回归系数为0.933），Y2=8.613X1＋2.670X2－69.310（模型的回归系数为0.982），其中，X1为胸径，X2为秆高，Y1为3度（5年生）毛竹秆重，Y2为4度（7年生）毛竹秆重，经检验方程具有实际意义，可以作为毛竹竹材采伐量快速估算模型。