摘要
研究证明,每一树种都能找到一最佳稳定不变的常数K,使实验形数不随树高而变。实验形数具有正形数的性质,并与正形率一样,具有稳定性,不随年龄、地位级、疏密度、地域而变。油松、山杨应用研究得到的K值与实验形数值建立的材积模型,精度高于陕西省当K=3,油松实验形数等于0.42,山杨等于0.41建立材积模型精度。采用实验形数法建立的材积模型,测算方便,应用简单,精度较高。
Proposes an improved method for Solving experimental form factor based on that every tree species has a non-variable best constant K so that the ex perimental form factor will not vary with the tree height. It was proved that experimental form factor has a normal form factor character, so as the normal quotient. It is stable and does not vary with the age, site class, penstiy and region of the tree. The precision of constructed volume model by using founded K and experimental form factor for Pinus tabuleaformis and P. davidiana was higher than that setted by Shaanxi province when K = 3, experimental form factor of P, tabvlaeformis = 0.42, experimental form factor of P. davidiana = 0.41. The measurement of factor constructed volume model by founded experimental form factor is convenient and using is simple and its precision is high.
出处
《西北林学院学报》
CSCD
1990年第3期41-49,共9页
Journal of Northwest Forestry University
关键词
实验形数
正形率
林积模型
求解法
experimental form factor, normal quotient, volume model, solving method
