globalchange  > 影响、适应和脆弱性
DOI: 10.1016/j.foreco.2013.12.007
Scopus记录号: 2-s2.0-84893700748
论文题名:
Root biomass of carbon plantings in agricultural landscapes of southern Australia: Development and testing of allometrics
作者: Paul K.I.; Roxburgh S.H.; England J.R.; Brooksbank K.; Larmour J.S.; Ritson P.; Wildy D.; Sudmeyer R.; Raison R.J.; Hobbs T.; Murphy S.; Sochacki S.; McArthur G.; Barton C.; Jonson J.; Theiveyanathan S.; Carter J.
刊名: Forest Ecology and Management
ISSN:  0378-1127
出版年: 2014
卷: 318
起始页码: 216
结束页码: 227
语种: 英语
英文关键词: Acacia ; Allometry ; Biodiversity plantings ; Carbon sequestration ; Eucalyptus ; Mallee plantings
英文摘要: Root biomass may to contribute a substantial proportion of the carbon sequestered in new tree plantings, particularly in regions where rainfall and/or site quality is relatively low as this may result in relatively high allocation of plant biomass below-ground to source required water or nutrients. However, root biomass is often overlooked because of difficulty with measurement. In Australia, most carbon plantings are currently mixed-species environmental or mallee eucalypt plantings on agricultural land in regions with rainfall of 250-850mmyear-1. Here, we collated new and existing root biomass data from ca. 900 individual trees or shrubs to develop and test allometric equations for predicting root biomass based on stem diameter (of unharvested trees or shrubs) or height (of coppice harvested trees) in these plantings. Equations developed showed significant differences between groupings of species with differing growth habits or from different genera. Grouping species into categories of: (i) non-eucalypts, (ii) tree-form eucalypts, (iii) unharvested mallee eucalypts, and (iv) coppiced mallee eucalypts, provided equations with model efficiencies of 0.64-0.90. In the process of collating data across different studies, corrections were required for data consistency. Uncertainty analysis showed that although these corrections resulted in some uncertainty in the equations developed, measurement errors, particularly of stem diameter, were also important contributors to this uncertainty. We tested equations developed using data from 11 environmental and mallee planting sites where direct measurements of root biomass were made through whole-plot excavation. Site-level predictions of root biomass from individual tree allometry were effective, with an efficiency of prediction of 0.98. These results indicate that the generic allometric equations developed can be confidently applied across the Australian agricultural region with 250-850mmyear-1 rainfall to obtain accurate regional estimates of root biomass in the currently relatively young (<20year old) environmental and mallee plantings. © 2014.
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被引频次[WOS]:19   [查看WOS记录]     [查看WOS中相关记录]
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/66071
Appears in Collections:影响、适应和脆弱性

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作者单位: CSIRO, Sustainable Agriculture Flagship and CSIRO Ecosystem Sciences, Australia; CSIRO, GPO Box 1700, ACT 2601, Australia; CSIRO, Private Bag 10, Clayton South, VIC 3169, Australia; CSIRO, Private Bag 5, Wembley, WA 6913, Australia; Department of Agriculture and Food, 444 Albany Hwy, Albany, WA 6330, Australia; Forest Products Commission, 3 Baron-Hay Court, South Perth, WA 6151, Australia; Fares Rural Pty Ltd., PO Box 526, Wembley, WA 6913, Australia; Department of Environment, Water and Natural Resources, South Australian Government, GPO Box 1047, Adelaide, SA 5001, Australia; The University of Melbourne, 500 Yarra Boulevard, Richmond VIC 3121, Australia; Department of Environmental Science, Murdoch University, 90 South Street, Murdoch, WA 6150, Australia; AusCarbon Pty Ltd., PO Box 395, Nedlands, WA 6909, Australia; The University of Western Sydney, Locked Bag 1797, Penrith, NSW 2751, Australia; Threshold Environmental Pty Ltd., PO Box 1124, Albany, WA 6331, Australia; Centre of Excellence in Natural Resource Management, The University of Western Australia, 1 Foreshore House, Albany, WA 6330, Australia

Recommended Citation:
Paul K.I.,Roxburgh S.H.,England J.R.,et al. Root biomass of carbon plantings in agricultural landscapes of southern Australia: Development and testing of allometrics[J]. Forest Ecology and Management,2014-01-01,318
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