Arid
DOI10.1007/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
ISSN0032-079X
EISSN1573-5036
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.
条目包含的文件
条目无相关文件。
个性服务
推荐该条目
保存到收藏夹
导出为Endnote文件
谷歌学术
谷歌学术中相似的文章
[Dossa, E. L.]的文章
[Diedhiou, S.]的文章
[Compton, J. E.]的文章
百度学术
百度学术中相似的文章
[Dossa, E. L.]的文章
[Diedhiou, S.]的文章
[Compton, J. E.]的文章
必应学术
必应学术中相似的文章
[Dossa, E. L.]的文章
[Diedhiou, S.]的文章
[Compton, J. E.]的文章
相关权益政策
暂无数据
收藏/分享

除非特别说明,本系统中所有内容都受版权保护,并保留所有权利。