DOI: 10.1016/j.foreco.2016.08.036
Scopus记录号: 2-s2.0-84987970961
论文题名: Growth and physiological responses to intensity and timing of thinning in short rotation tropical Acacia hybrid plantations in South Vietnam
作者: Huong V.D. ; Mendham D.S. ; Close D.C.
刊名: Forest Ecology and Management
ISSN: 0378-1127
出版年: 2016
卷: 380 起始页码: 232
结束页码: 241
语种: 英语
英文关键词: Acacia hybrid
; LAI
; Litterfall
; Moderate and intensive thinning
; Photosynthesis
Scopus关键词: Photosynthesis
; Physiological models
; Physiology
; Plants (botany)
; Acacia hybrid
; Leaf water potential
; Litterfalls
; Management options
; Moderate and intensive thinning
; Phosphorus concentration
; Physiological response
; Planting density
; Forestry
; crop rotation
; growth response
; hybrid
; leaf area index
; legume
; litterfall
; phosphorus
; photosynthesis
; physiological response
; thinning
; tropical region
; water stress
; Viet Nam
; Acacia
英文摘要: Acacia hybrid plantations are widely planted for pulpwood in Vietnam, but have the potential to be managed for high value saw-logs. This study examined the growth and physiological responses to thinning as a management option to increase the sawlog yield and value. Treatments were: unthinned (planting density 1111 trees ha−1), thinned to 833 or 600 trees ha−1 in a single thinning at either age 2 (early) or 3 (late) years, and progressively thinned from 1111 to 833 trees ha−1 at age 2 years, and then to 600 trees ha−1 at age 3 years. Three years after early thinning to 600 stems ha−1, mean stem diameter was increased by 16.7% and the stand volume was reduced by 15.8%; thinning to 833 stems ha−1 resulted in no significant loss in stand volume and increased mean diameter by 7.5%. The leaf area index, LAI of stands thinned to 600 stems ha−1 recovered rapidly and there was no significant difference between unthinned and thinned treatments 1 year after thinning; this recovery was also associated with a reduction in litterfall. Thinning to 600 stems ha−1 increased A1500 of the lower crown by 23.5 and 17.4% at age 2 and 3 yr, respectively; and this was associated with increased foliar phosphorus concentration. Thinning reduced leaf water stress during the dry season; leaf water potential and tree growth were significantly influenced by season. It was concluded that thinning to 600 trees ha−1 at age 2 years or to 833 trees ha−1 at age 3 years will produce wood with the highest diameter. © 2016 Elsevier B.V. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/64694
Appears in Collections: 影响、适应和脆弱性
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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, Australia; Tasmanian Institute of Agriculture, School of Land and Food, University of Tasmania, Private Bag 98, Hobart, Tasmania, Australia
Recommended Citation:
Huong V.D.,Mendham D.S.,Close D.C.. Growth and physiological responses to intensity and timing of thinning in short rotation tropical Acacia hybrid plantations in South Vietnam[J]. Forest Ecology and Management,2016-01-01,380