DOI: 10.1016/j.foreco.2016.06.012
Scopus记录号: 2-s2.0-84973861991
论文题名: Alternative field fertilization techniques to promote restoration of leguminous Acacia koa on contrasting tropical sites
作者: Earnshaw K.M. ; Baribault T.W. ; Jacobs D.F.
刊名: Forest Ecology and Management
ISSN: 0378-1127
出版年: 2016
卷: 376 起始页码: 126
结束页码: 134
语种: 英语
英文关键词: Controlled-release fertilizer
; Nitrogen
; Nutrient management
; Outplanting
; Phosphorus
; Tropical forest restoration
Scopus关键词: Agriculture
; Conservation
; Forestry
; Nitrogen
; Nitrogen fertilizers
; Nutrients
; Phosphorus
; Reforestation
; Restoration
; Tropics
; Controlled-release fertilizers
; Fertilizer response
; Nutrient management
; Outplanting
; Seedling performance
; Site-specific interactions
; Tropical forest
; Tropical restoration
; Fertilizers
; competition (ecology)
; environmental restoration
; fertilizer application
; growth response
; legume
; nitrogen
; nutrient cycling
; phosphorus
; regeneration
; restoration ecology
; rhizosphere
; soil fertility
; survival
; transplantation
; tropical forest
; Hawaii [United States]
; United States
; Acacia koa
英文摘要: Field fertilization can promote early growth and survival of planted trees on degraded pastures and agricultural lands where low soil fertility and high herbaceous competition inhibit regeneration success. Controlled-release fertilizers (CRF) may improve the effectiveness of fertilization relative to that of immediately available fertilizers (IAF) because CRF gradually release nutrients directly to the root zone, thereby limiting nutrient losses. Despite past research in boreal and temperate landscapes, few studies have tested the efficacy of similar applications in tropical systems where year-round high temperatures can increase release rates of CRF and intensity of competing vegetation. On two contrasting sites on the Island of Hawaii, USA, we evaluated early growth and survival responses of koa (Acacia koa Gray), a fast-growing legume, using ten treatments: a control, four IAF formulations, and five rates of polymer-coated CRF (15N-9P-12K; 15-75 g). At Pahala, a productive site, we detected no significant growth, survival, or foliar nitrogen (N) or phosphorous (P) responses to the fertilizer treatments. At Volcano, a rockier and cooler site on younger soil, height increased by 36-49% for the highest performing CRF and IAF relative to the control; diameter likewise increased by 55-92%. Growth responses appeared to be a result of P fertilization rather than N. The highest performing IAF had a reduced survival rate relative to the lowest CRF (46% vs. 83%). Although total nutrient application rates were much lower for CRF, our results suggest that on tropical restoration sites, CRF may promote seedling performance at least equally to that of IAF. There is a need to more carefully evaluate the effects of site-specific interactions that may determine field fertilizer responses, across a range of genera and functional groups. © 2016 Elsevier B.V. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/64813
Appears in Collections: 影响、适应和脆弱性
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作者单位: Department of Forestry and Natural Resources, Purdue University, West Lafayette, IN, United States; Forest Solutions, Inc., Paauilo, HI, United States
Recommended Citation:
Earnshaw K.M.,Baribault T.W.,Jacobs D.F.. Alternative field fertilization techniques to promote restoration of leguminous Acacia koa on contrasting tropical sites[J]. Forest Ecology and Management,2016-01-01,376