Knowledge Resource Center for Ecological Environment in Arid Area
DOI | 10.1016/j.jaridenv.2016.03.002 |
The magnitude and spatial extent of influence of Faidherbia albida trees on soil properties and primary productivity in drylands | |
Sileshi, Gudeta W.1,2 | |
通讯作者 | Sileshi, Gudeta W. |
来源期刊 | JOURNAL OF ARID ENVIRONMENTS
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ISSN | 0140-1963 |
EISSN | 1095-922X |
出版年 | 2016 |
卷号 | 132页码:1-14 |
英文摘要 | Faidherbia (Faidherbia albida) is being promoted widely in interventions for combating desertification, regreening of the Sahel and agroforestry projects in dry lands. Some scientists have questioned the wisdom of its wider promotion without clear evidence of its impacts. This review provides novel analyses of the magnitude and spatial extent of its influence on soil properties and primary productivity. A meta analysis provided evidence for significant increases in soil organic carbon (SOC) (by 46%), total nitrogen (50%), phosphorus (21%), potassium (32%), and yields of maize (150%) and sorghum (73%) under the tree canopy compared to the open area. However, larger increases in SOC and nutrients occurred on inherently nutrient-poor sites than on nutrient-rich sites. Similarly, large increases in crop yields occurred in suboptimal conditions for crop productivity than in optimal conditions. The tree created predictable patterns in soil nutrients and crop yields consistent with distance decay models of spatial interaction. Its growth and canopy development appear to explain the size dependence of the spatial extent of its influence, with a marked influence observed under large trees than small trees. The review also identified enormous variability in study design and statistical rigor, which appear to mask the expected patterns. Study designs and inferential statistics in current use neither address the intrinsic causality of patterns nor do they offer a mechanistic insight into the observed patterns. The major concerns and their implications are discussed and improvements for future research on single-tree influences on ecosystem properties in dry lands are suggested. (C) 2016 Published by Elsevier Ltd. |
英文关键词 | Bayesian analysis Distance-decay Ecological field theory Meta-analysis |
类型 | Review |
语种 | 英语 |
国家 | Malawi ; Zambia |
收录类别 | SCI-E |
WOS记录号 | WOS:000377927600001 |
WOS关键词 | GENERAL QUANTITATIVE THEORY ; ACACIA-ALBIDA ; UNDERSTOREY VEGETATION ; FOREST STRUCTURE ; GROWTH ; NUTRIENT ; SAVANNA ; COMPETITION ; MANAGEMENT ; HIGHLANDS |
WOS类目 | Ecology ; Environmental Sciences |
WOS研究方向 | Environmental Sciences & Ecology |
资源类型 | 期刊论文 |
条目标识符 | http://119.78.100.177/qdio/handle/2XILL650/194144 |
作者单位 | 1.World Agroforestry Ctr ICRAF, Chitedze Agr Res Stn, Southern Africa Programme, POB 30798, Lilongwe, Malawi; 2.1244 Ibex Hill, Lusaka, Zambia |
推荐引用方式 GB/T 7714 | Sileshi, Gudeta W.. The magnitude and spatial extent of influence of Faidherbia albida trees on soil properties and primary productivity in drylands[J],2016,132:1-14. |
APA | Sileshi, Gudeta W..(2016).The magnitude and spatial extent of influence of Faidherbia albida trees on soil properties and primary productivity in drylands.JOURNAL OF ARID ENVIRONMENTS,132,1-14. |
MLA | Sileshi, Gudeta W.."The magnitude and spatial extent of influence of Faidherbia albida trees on soil properties and primary productivity in drylands".JOURNAL OF ARID ENVIRONMENTS 132(2016):1-14. |
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