气候变化领域集成服务门户(CCPortal): Stand density and genetic improvement have site-specific effects on the economic returns from Pinus radiata plantations

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DOI	10.1016/j.foreco.2019.05.003
	Stand density and genetic improvement have site-specific effects on the economic returns from Pinus radiata plantations
	Dash J.P.; Moore J.R.; Lee J.R.; Klápště J.; Dungey H.S.
发表日期	2019
ISSN	0378-1127
起始页码	80
结束页码	92
卷号	446
英文摘要	Intensively managed forests are expected to play an increasingly important role in meeting future global demand for wood products. To meet this challenge, a key focus will be on lifting yields from these forests along with economic returns. In this study, we used data from a long-term series of trials that were established in radiata pine (Pinus radiata D. Don) to examine the effect that stand density, deployment of genetically-improved seedlots, and site have on economic returns. This dataset comprised end-of-rotation assessments of eight installations of a trial series in New Zealand that spanned a wide range of site productivity. Each installation typically contained four seedlots with differing levels of genetic improvement growing at three levels of stand density. Mixed effects models were used to examine the effects of stand density, site, seedlot genetic rating, and their interactions on Total Value (NZ$ ha−1) and Relative Value (NZ$ m−3). There was a strong positive relationship between stand density and Total Value, but there was generally no significant relationship between stand density and Relative Value. Of the variation in Total Value not explained by the fixed effect of stand density, approximately 60% was due to differences among trial installations (i.e. site) and 5–7% was due to seedlot genetic worth. There were significant first order interactions between seedlot and site, and between site and stand density. Seedlot genetic worth was able to explain a higher proportion of the variation in Relative Value (between 10 and 18% depending on the genetic trait under consideration). The genetic worth of a seedlot in terms of stem straightness rating was able to explain the greatest proportion of variation in Relative Value. These results highlight the importance of the choice of location and stand density management have on the economic returns from intensively-managed forests. While seedlot genetic rating has a smaller effect on economic returns, improvements in traits such as stem straightness and branch characteristics also make an important contribution. As silvicultural practices move towards higher stand densities, and the next generation of genetically improved trees are deployed, a more precise understanding of the interactions of site, silviculture and genetics will be needed. New ways of testing and modelling these interactions will be required but will ensure the delivery of a more informed approach to forest management. © 2019 Elsevier B.V.
英文关键词	Forest management; Forest productivity; Sustainability; Sustainable intensification; Tree breeding
语种	英语
scopus关键词	Economic and social effects; Productivity; Sustainable development; Forest productivity; Genetic improvements; Intensively managed forests; Mixed effects models; Silvicultural practices; Stand density managements; Sustainable intensification; Tree breeding; Forestry; coniferous forest; economic activity; forest management; forestry production; genetic analysis; long-term change; plant breeding; plantation forestry; silviculture; stand dynamics; sustainability; sustainable forestry; Forest Management; Forestry; Forests; Productivity; Rating; Stand Density; Straightness; Upgrading; New Zealand; Pinus radiata; Radiata
来源期刊	Forest Ecology and Management
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/155946
作者单位	Scion, 49 Sala Street, Rotorua, 3010, New Zealand
推荐引用方式 GB/T 7714	Dash J.P.,Moore J.R.,Lee J.R.,et al. Stand density and genetic improvement have site-specific effects on the economic returns from Pinus radiata plantations[J],2019,446.
APA	Dash J.P.,Moore J.R.,Lee J.R.,Klápště J.,&Dungey H.S..(2019).Stand density and genetic improvement have site-specific effects on the economic returns from Pinus radiata plantations.Forest Ecology and Management,446.
MLA	Dash J.P.,et al."Stand density and genetic improvement have site-specific effects on the economic returns from Pinus radiata plantations".Forest Ecology and Management 446(2019).