An economic analysis of hardwood treatment in loblolly pine plantations--a whole rotation dynamic programming approach
An economic analysis of hardwood treatment in loblolly pine plantations--a whole rotation dynamic programming approach
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火炬松人工林阔叶树处理的经济分析——整体轮作动态规划法
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发表时间：
1985
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通讯作者：
L. Valsta
中科院分区：
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作者：
L. Valsta
批准：J.Douglas Brodie完成火炬松(Pinus taeda L.)植被管理的经济评估在再生和随后的发布时间，两个现有的增长模型在动态规划分析中被连接在一起。第一个模型(Burkhart和Sprint，1984)提供了用不同的硬木成分再生的林分的投影，但不允许中间间伐或释放入口。第二个模型(Cao et a/.，1982)允许在没有硬木的纯针叶林中通过中间间伐控制密度。综合生长模型涵盖了整个轮作，因此，植被控制、间伐和最终收获可以联合优化。由此得到的分析模型可用于评估大多数植被管理和间伐替代方案，包括整地处理，而不需要随后的硬木密度控制。它排除了涉及针叶树密度控制而没有先前或同时全部移除硬木的替代方案。模型的运行结果表明，动态规划模型能够较好地刻画经济问题以及植被管理与林分之间的相互关系
approved: J. Douglas Brodie To accomplish an economic evaluation of vegetation management in loblolly pine (Pinus taeda L.) at regeneration and a subsequent release time, two existing growth models were linked together in a dynamic programming analysis. The first model (Burkhart and Sprinz, 1984) provides a projection of stands regenerated with varying hardwood components but does not allow intermediate thinning or release entries. The second model (Cao et a/.,, 1982) permits density control through intermediate thinning in pure conifer stands without hardwoods. The combined growth model covers a whole rotation and, hence, vegetation control, intermediate thinnings, and final harvest can be optimized jointly. The resulting analytic model can be used to assess most vegetation management and thinning alternatives including site preparation treatment without subsequent density control of hardwoods. It excludes alternatives that involve conifer density control without previous or concurrent total hardwood removal. The performance of the model indicates that the dynamic programming formulation was able to characterize the economic problem and the interrelationships between vegetation management and further stand