气候变化领域集成服务门户(CCPortal): Growth, physiological responses and wood production of an Acacia auriculiformis plantation in southern Vietnam following mid-rotation thinning, application of phosphorus fertiliser and organic matter retention

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DOI	10.1016/j.foreco.2020.118211
	Growth, physiological responses and wood production of an Acacia auriculiformis plantation in southern Vietnam following mid-rotation thinning, application of phosphorus fertiliser and organic matter retention
	Huong V.D.; Mendham D.S.; Beadle C.; Hai N.X.; Close D.C.
发表日期	2020
ISSN	0378-1127
卷号	472
英文摘要	Acacia auriculiformis plantations are widely planted in Vietnam. Initially they were grown for wood chip production, but these plantations have potential to be managed for higher value sawing and/or peeling grade logs, through enhanced silvicultural management. This study sought to understand the impact of resource constraints on responses of A. auriculiformis plantations to thinning, phosphorus fertiliser application and slash retention at age four years on growth and physiology of A. auriculiformis trees to rotation end at age nine years. A trial in South Vietnam had a factorial combination of thinning (unthinned (planted at 1666 trees ha−1), or thinned to 833 trees ha−1), P fertilizer (Nil, or 50 kg P ha−1), and organic matter manipulation (slash and litter retained or removed). Thinning significantly increased photosynthetic rate (Amax) compared to control (unthinned) for at least 12 months after treatment application. Combined thinning and phosphorus fertiliser (P) application increased Amax, but Amax in the unthinned treatment did not significantly increase when supplied with additional P. Foliar nitrogen and phosphorus concentrations were greater in thinned than in unthinned treatments. Thinning commensurately reduced the leaf area, but subsequently, leaf area increased again in the thinned treatments compared to the unthinned treatments, such that twenty months after thinning there were no significant differences in leaf area index between thinned plus P fertiliser and unthinned treatments. There were significant differences in the mean diameter under different thinning regimes at one and five years after thinning. At nine years, average diameter of unthinned treatments (16.2 cm) was significantly less than the average diameter of the thinned treatments (19.0 cm). The application of P fertiliser or differences in management of slash and litter had no significant effect on mean tree diameter. The recovery of larger sawlogs was significantly higher in thinned (68%) than in unthinned treatments (25%). At nine years, the total stand volume of wood products from the thinned treatments (including the thinnings harvested in year four) was 340 m3 ha−1, which was 11 m3 ha−1 higher than for the unthinned treatments (329 m3 ha−1). The results suggest that a commercial mid-rotation thinning of A. auriculiformis in these environments can increase the value of these plantations to acacia growers. © 2020 Elsevier B.V.
英文关键词	Acacias; Leaf area index and litterfall; Phosphorus; Thinning
语种	英语
scopus关键词	Biogeochemistry; Fertilizers; Organic compounds; Phosphorus; Physiological models; Physiology; Wood products; Acacia auriculiformis; Average diameter; Organic matter retention; Photosynthetic rate; Physiological response; Resource Constraint; Silvicultural management; Thinning regimes; Forestry; concentration (composition); fertilizer application; growth; leaf area index; nitrogen; phosphorus; physiological response; plantation forestry; shrub; thinning; wood quality; Fertilizers; Forestry; Organic Compounds; Phosphorus; Physiology; Wood Products; Viet Nam; Acacia; Acacia auriculiformis
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/155213
作者单位	Forest Science Institute of South Vietnam, Ho Chi Minh City, Viet Nam; CSIRO Land and Water, Private Bag 12, Hobart, Tasmania 7001, Australia; Tasmanian Institute of Agriculture, University of Tasmania, Private Bag 98, Hobart, Tasmania 7001, Australia
推荐引用方式 GB/T 7714	Huong V.D.,Mendham D.S.,Beadle C.,et al. Growth, physiological responses and wood production of an Acacia auriculiformis plantation in southern Vietnam following mid-rotation thinning, application of phosphorus fertiliser and organic matter retention[J],2020,472.
APA	Huong V.D.,Mendham D.S.,Beadle C.,Hai N.X.,&Close D.C..(2020).Growth, physiological responses and wood production of an Acacia auriculiformis plantation in southern Vietnam following mid-rotation thinning, application of phosphorus fertiliser and organic matter retention.Forest Ecology and Management,472.
MLA	Huong V.D.,et al."Growth, physiological responses and wood production of an Acacia auriculiformis plantation in southern Vietnam following mid-rotation thinning, application of phosphorus fertiliser and organic matter retention".Forest Ecology and Management 472(2020).