摘要
本文以林分生长模型为基础，将林分的经营指数作为状态变量，将主伐时林分平均直径作为目标，将达到这一目标时林分总收获蓄积量作为指标函数，建立了离散确定性动态规划模型，编制了计算机模拟系统。利用此系统即可对落叶松不同培育目标下的最佳间伐时间、间伐强度和主伐年龄等进行决策。结果表明，优化决策方法在保留株数、间伐次数和总收获蓄积量上都优于一般决策方法，它既可对落叶松林分进行生长预测，也可为制定经营单位的经营方案提供依据。
Based on the stand growth models,a discrete deterministic dynamic program-ming
model was established which took the management index as state variables, the mean
diameter of final cutting as a goal and the total volume as the objective function at the time
when the goal is reached.A computer simulation system was produced. With this system,the
optimum thinning time,thinning intensity and final cutting age could be decided for larch
plantation with different goals。The result shows that the number of reserved trees,number of
times of thinning and total volume yield calculated by this method are better than those by the
common one。It not only forecasts growth of stand for larch plantation but also provides basis
for making managerial plans。
出处
《林业科学研究》
CSCD
北大核心
1994年第2期175-180,共6页
Forest Research
基金
辽宁省重点课题
关键词
落叶松
林分
间伐
森林经理
larch stand,thinning,dynamic programming,computer
simulation system,forest management
