Knowledge Resource Center for Ecological Environment in Arid Area
DOI | 10.1007/s11104-009-0044-8 |
Spatial patterns of P fractions and chemical properties in soils of two native shrub communities in Senegal | |
Dossa, E. L.2; Diedhiou, S.2; Compton, J. E.3; Assigbetse, K. B.4; Dick, R. P.1 | |
通讯作者 | Dick, R. P. |
来源期刊 | PLANT AND SOIL
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ISSN | 0032-079X |
EISSN | 1573-5036 |
出版年 | 2010 |
卷号 | 327期号:1-2页码:185-198 |
英文摘要 | Two shrub species (Piliostigma reticulatum (D.C.) Hochst (Caesalpinioideae) and Guiera senegalensis J.F. Gmel (Combretaceae) are commonly found in farmers’ fields at varying densities in semi-arid Senegal and throughout the Sahel where soils have chronically low phosphorus (P) availability. It seems plausible that shrub litter and the rhizospheres could influence P fractions and other chemical soil properties that affect crop productivity. Thus, a study was done at two sites, on the distribution of inorganic and organic soil P pools, organic C levels, and pH in soil beneath and outside the canopies of P. reticulatum and G. senegalensis (0-30 cm depth). Both sites had low total P ranging from 64 mg P kg(-1) to 135 mg P kg(-1), and low extractable PO4 (resin Pi) (1-6 mg P kg(-1)) with P fractions dominated by NaOH-P. Organic P (Po) made up about 50% of total P, and most of the organic P (> 60%) was found in the NaOH-P fractions. The labile P, particularly bicarb-Po was higher in soil beneath shrub canopies (8.4 mg P kg (-1)), than outside the canopy (6.2 mg P kg (-1)). Similarly, C, N and P to a lesser extent, were more concentrated beneath shrub canopies. P. reticulatum soil was dominated by the NaOH-Po fraction, whereas G. senegalensis had higher bicarb-Po at one of the study sites. An index of biologically available organic P (Bicarb-Po) / (Bicarb-Po + Bicar-Pi + Resin Pi) was > 60% and indicates that biological processes represent an important part of P cycling in these shrub ecosystems. The differential ability of shrubs in modifying soil chemical properties under their canopies has major implications for biogeochemical cycling of nutrients and C in sandy soils of semi arid Sahelian ecosystems. |
英文关键词 | Canopy soil P fractions Sahel Semi-arid Shrubs Total C |
类型 | Article |
语种 | 英语 |
国家 | USA ; Senegal |
收录类别 | SCI-E |
WOS记录号 | WOS:000273754800015 |
WOS关键词 | PHOSPHORUS FRACTIONS ; ORGANIC PHOSPHORUS ; SEMIARID SOILS ; PEANUT BASIN ; TROPICAL SOILS ; DYNAMICS ; DESERT ; NIGERIA ; CARBON ; AVAILABILITY |
WOS类目 | Agronomy ; Plant Sciences ; Soil Science |
WOS研究方向 | Agriculture ; Plant Sciences |
来源机构 | French National Research Institute for Sustainable Development |
资源类型 | 期刊论文 |
条目标识符 | http://119.78.100.177/qdio/handle/2XILL650/165985 |
作者单位 | 1.Ohio State Univ, Sch Nat Resources, Columbus, OH 43210 USA; 2.Oregon State Univ, Dept Crop & Soil Sci, Corvallis, OR 97331 USA; 3.US EPA, Western Ecol Div, Natl Hlth & Environm Effects Res Lab, Corvallis, OR 97333 USA; 4.IRD, Unite Rech SeqBio, LEMSAT, Dakar, Senegal |
推荐引用方式 GB/T 7714 | Dossa, E. L.,Diedhiou, S.,Compton, J. E.,et al. Spatial patterns of P fractions and chemical properties in soils of two native shrub communities in Senegal[J]. French National Research Institute for Sustainable Development,2010,327(1-2):185-198. |
APA | Dossa, E. L.,Diedhiou, S.,Compton, J. E.,Assigbetse, K. B.,&Dick, R. P..(2010).Spatial patterns of P fractions and chemical properties in soils of two native shrub communities in Senegal.PLANT AND SOIL,327(1-2),185-198. |
MLA | Dossa, E. L.,et al."Spatial patterns of P fractions and chemical properties in soils of two native shrub communities in Senegal".PLANT AND SOIL 327.1-2(2010):185-198. |
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