Exploring forestry options with M?ori landowners: an economic assessment of radiata pine, rimu, and m?nuka

IF 1.5 4区 农林科学 Q2 FORESTRY New Zealand Journal of Forestry Science Pub Date : 2019-06-20 DOI:10.33494/NZJFS492019X44X
S. Pizzirani, J. Monge, P. Hall, G. Steward, L. Dowling, P. Caskey, S. McLaren
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引用次数: 6

Abstract

Background: A quarter of New Zealand’s land area is currently covered in indigenous forest although only indigenous forests on private land can be harvested. In addition, planted exotic forests (~90% Pinus radiata D.Don) cover a further 7% of the land, and these form the main basis of New Zealand’s forestry industry. However, some landowners are seeking to plant a more diverse range of species (including New Zealand indigenous species) that can be managed in different ways to produce a range of products. Methods: A “cradle-to-gate” life cycle-based economic assessment of three forestry scenarios was undertaken in collaboration with members of Ng?ti Porou, an indigenous M?ori tribe. The three scenarios were: (1) “business as usual” (i.e. intensive management of radiata pine); (2) continuous-cover forestry management of the indigenous coniferous tree species rimu (Dacrydium cupressinum Lamb.); and (3) intensive production-scale forestry of the indigenous scrub species m?nuka (Leptospermum scoparium J.R.Forst. & G.Forst.). Using a 120-year timeframe, discount rates and opportunity costs were applied and a flat- and steep-land comparative analysis was performed (for radiata pine and rimu). Results: The Net Present Value (NPV) was calculated for each scenario and showed that, on flat land, only the m?nuka scenario is profitable. However, applications of discount rates can result in a negative NPV, as is the case with the radiata pine and rimu scenarios. On steep land, both the radiata pine and rimu steep-land scenarios have improved NPV returns due to a lower opportunity cost. On steep land, radiata pine is generally profitable with a discount rate of 6% or lower and a stumpage rate of over $100 m3 and rimu is generally profitable with a discount rate of 2% or lower and a stumpage rate of over $650 m-3. Conclusions: This analysis demonstrates the importance of strategically considering what tree species to plant, what slope of land to plant them on, and what forest management technique to utilise. Furthermore, this analysis highlights the importance of choosing appropriate discount rates and the effect of other inherent assumptions, such as opportunity cost.
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与M?奥里土地所有者:辐射松、松木和松木的经济评估nuka
背景:新西兰四分之一的土地面积目前被土著森林覆盖,尽管只有私人土地上的土著森林才能采伐。此外,种植的奇异森林(约90%的辐射松D.Don)还覆盖了7%的土地,这些森林构成了新西兰林业的主要基础。然而,一些土地所有者正在寻求种植更多样的物种(包括新西兰本土物种),这些物种可以以不同的方式进行管理,以生产一系列产品。方法:与Ng?ti Porou,一个土著M?ori部落。三种情况是:(1)“一切如常”(即辐射松的集约管理);(2) 对本地针叶树种日木(Dacrydium cupesinum Lamb.)的连续覆盖林业管理;和(3)本土灌丛物种m?nuka(Leptispermum scopearium J.R.Forst.&G.Forst.)。使用120年的时间框架,应用贴现率和机会成本,并进行平坦和陡峭的土地比较分析(针对辐射松和瑞木)。结果:计算了每种情景的净现值(NPV),结果表明,在平坦的土地上,只有m?核武器计划是有利可图的。然而,贴现率的应用可能会导致负NPV,就像辐射松和梨木的情况一样。在陡峭的土地上,由于机会成本较低,辐射松和里木陡峭的土地情景都提高了净现值回报。在陡峭的土地上,辐射松通常以6%或更低的折扣率和超过100美元的树桩率盈利,而瑞木通常以2%或更低的贴现率和超过650美元-3的树桩率获利。结论:这项分析表明了从战略上考虑种植什么树种、在什么坡度的土地上种植以及使用什么森林管理技术的重要性。此外,该分析强调了选择适当贴现率的重要性以及其他固有假设(如机会成本)的影响。
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来源期刊
CiteScore
2.20
自引率
13.30%
发文量
20
审稿时长
39 weeks
期刊介绍: The New Zealand Journal of Forestry Science is an international journal covering the breadth of forestry science. Planted forests are a particular focus but manuscripts on a wide range of forestry topics will also be considered. The journal''s scope covers forestry species, which are those capable of reaching at least five metres in height at maturity in the place they are located, but not grown or managed primarily for fruit or nut production.
期刊最新文献
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