Comparing the Costs and Revenues of Transformation to Continuous Cover Forestry for Sitka Spruce in Great Britain
Comparing the Costs and Revenues of Transformation to Continuous Cover Forestry for Sitka Spruce in Great Britain
复制标题
比较英国西特卡云杉连续覆盖林业转型的成本和收入
作者：
O. Davies;G. Kerr
最近，连续覆盖林业(CCF)在英国已成为一种被接受的森林管理方法，但其经济后果的不确定性可能会成为其更广泛使用的障碍。研究了改造锡特卡云杉(Picea Sitchens(Bong.)Carr.)敬中华公社。主要结论是，如果自然更新是成功的，并且目的是生产一个简单的冠层结构，那么改造成CCF的成本不一定比砍伐和补种更高。转型为具有三层或更多层的更复杂的顶棚结构的长期价值较低，需要从管理目标的角度证明额外成本的合理性。这项研究的主要结果是一个分析电子表格，使从业者和政策制定者能够调查成本、收入和贴现率对未来20年、100年和永久净现值估计的影响，以适应当地情况。本文总结了在英国背景下的研究方法和结果，将这些放在更广泛的国际背景下，并考虑了该方法的优点、应用和可能的进一步发展。
Recently continuous cover forestry (CCF) has become an accepted approach to forest management in Britain, but uncertainty about its economic consequences may be a barrier to its wider use. A study was carried out to examine the costs and revenues of transforming a stand of Sitka spruce (Picea sitchensis (Bong.) Carr.) to CCF. The main conclusion is that transformation to CCF need not be more costly than clearfelling and replanting if natural regeneration is successful and the aim is to produce a simple canopy structure. The long-term value of transformation to a more complex canopy structure, with three or more strata, is lower and the extra costs need to be justified in terms of management objectives. The main output from the study is an analysis spreadsheet that empowers practitioners and policy makers to investigate the effects of costs, revenues and discount rates on estimates of net present value over 20 years, 100 years and in perpetuity, to suit local conditions. This paper summarises the method and results of the study in a British context, sets these in a wider international context, and considers the merits, applications and possible further developments of the approach.