| 用动态规划方法探讨油松人工林最适密度 |
| |
| 引用本文： | 张运锋. 用动态规划方法探讨油松人工林最适密度[J]. 北京林业大学学报, 1986, 8(2): 20-29 |
| |
| 作者姓名： | 张运锋 |
| |
| 摘 要： | 本文采用Richards函数的修正式拟合林分直径生长,并考虑间伐引起的林分直径非生长性增长,将林分平均直径和每公顷株数作为状态变量,将林分价值作为指标函数,建立了离散确定性动态规划模型,求出了油松(Pinus tabulaeformis)人工林各地位级不同年龄、不同初始状态的林分最适经营密度。
|
| 关 键 词： | 油松 疏伐 林分密度 动态规划 |
THE OPTIMAL STAND DENSITY OF PINUS TABULAEFORMISPLANTATION AS DETERMINED BY METHOD OF DYNAMIC PROGRAMMING |
| |
| Zhang Yunfeng. THE OPTIMAL STAND DENSITY OF PINUS TABULAEFORMISPLANTATION AS DETERMINED BY METHOD OF DYNAMIC PROGRAMMING[J]. Journal of Beijing Forestry University, 1986, 8(2): 20-29 |
| |
| Authors: | Zhang Yunfeng |
| |
| Affiliation: | Zhang Yunfeng |
| |
| Abstract: | The growth of quadratic mean diameter of Pinus tabulaeformis plantation was simulated by using a modified Richards' function, meanwhile, the nongrowing increment in diameter as the result of thinning was taken into account. And was established a discrete deterministic dynamic programming model which took the quadratic mean diameter and the number of stems per hectare as two state variables, and took the stand revenue as the objective function. With this model, the optimal stand densities for different site indices and variant initial states of even-aged stands were determined |
| |
| Keywords: | Pinus tabulaeformis thinning stand density dynamic programming |
| 本文献已被 CNKI 维普 等数据库收录！ |
|
