DOI: 10.1016/j.foreco.2016.04.031
Scopus记录号: 2-s2.0-84963780467
论文题名: Annual diameter growth of Pterocarpus angolensis (Kiaat) and other woodland species in Namibia
作者: Van Holsbeeck S. ; De Cauwer V. ; De Ridder M. ; Fichtler E. ; Beeckman H. ; Mertens J.
刊名: Forest Ecology and Management
ISSN: 0378-1127
出版年: 2016
卷: 373 起始页码: 1
结束页码: 8
语种: 英语
英文关键词: Forest management
; Growth rate
; Mean diameter increment
; Pterocarpus angolensis
; Tree rings
Scopus关键词: Growth rate
; Harvesting
; Logging (forestry)
; Timber
; Diameter increment
; Mean diameter
; Number of samples
; Pterocarpus angolensis
; Sustainable harvesting
; Sustainable management
; Tree rings
; Tree-ring analysis
; Forestry
; annual variation
; deciduous tree
; diameter
; forest management
; growth rate
; guideline
; sustainable development
; sustainable forestry
; timber harvesting
; tree ring
; woodland
; Namibia
; Baikiaea plurijuga
; Burkea africana
; Pterocarpus angolensis
; Schinziophyton rautanenii
; Terminalia sericea
英文摘要: Pterocarpus angolensis DC. (Kiaat) is one of the most preferred timber species that occurs in most southern African countries, including Namibia. In Namibia, the species mainly occurs across the five regions in the north-eastern part of the country where commercial timber harvesting has taken place since the 1940s. Information about the growth rates of the species is currently lacking, yet this information is required to determine a sustainable harvesting regime in Namibia. Therefore, more data about diameter increment is needed. This study aims to (1) determine annual diameter increment of P. angolensis in order to assist in planning for sustainable harvesting levels in the northern regions of Namibia, (2) compare growth of P. angolensis with other woodland species (Burkea africana, Baikiaea plurijuga, Terminalia sericea and Schinziophyton rautanenii) and (3) compare P. angolensis growth rates found in northern Namibia with those found in other countries within its distribution range. A total of 111 increment cores and 73 stem discs were collected for tree-ring analysis. The results showed that the average diameter increment of P. angolensis was higher in the Kavango regions (0.71-0.80 cm yr-1) than in neighbouring regions (0.35-0.41 cm yr-1). The northern Namibian growth rate is estimated as 0.50 cm yr-1 and lies within the growth range reported for southern Africa. Growth rates of P. angolensis were more than 0.10 cm yr-1 lower than rates of T. sericea and S. rautanenii, but 0.10 cm yr-1 higher than B. africana and B. plurijuga. Age-diameter relationships of P. angolensis may be a good indicator of tree age if a sufficient number of samples are obtained. Our results revealed a rotation cycle of 95-100 years to reach the minimum harvesting diameter of 45 cm in the Kavango regions. This rotation cycle should be a good guideline for sustainable management of this species. This study suggests that simple ring counting on increment cores and stem discs with additional diameter data can provide valuable information on growth rates and rotation cycles. Additional data and work on older trees (>100 years) is required to complete the age-diameter framework. © 2016 Elsevier B.V. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/64895
Appears in Collections: 影响、适应和脆弱性
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作者单位: Ghent University, Department of Applied Bioscience, V. Vaerwyckweg 1 Camp. Schoonmeersen, Ghent, Belgium; Faculty of Natural Resources and Spatial Sciences, Namibia University of Science and Technology, Private Bag 13388, Windhoek, Namibia; Wood Biology Service, Royal Museum for Central Africa, Leuvensesteenweg 13, Tervuren, Belgium; Georg-August-University Göttingen, Crop Production Systems in the Tropics, Grisebachstr. 6, Göttingen, Germany
Recommended Citation:
Van Holsbeeck S.,De Cauwer V.,De Ridder M.,et al. Annual diameter growth of Pterocarpus angolensis (Kiaat) and other woodland species in Namibia[J]. Forest Ecology and Management,2016-01-01,373