DOI: 10.1002/2016GB005371
Scopus记录号: 2-s2.0-84988036990
论文题名: A structural equation model analysis of phosphorus transformations in global unfertilized and uncultivated soils
作者: Hou E ; , Chen C ; , Kuang Y ; , Zhang Y ; , Heenan M ; , Wen D
刊名: Global Biogeochemical Cycles
ISSN: 8866236
出版年: 2016
卷: 30, 期: 9 起始页码: 1300
结束页码: 1309
语种: 英语
英文关键词: Hedley P fractionation
; soil P availability
; soil P dynamics
; structural equation modeling
Scopus关键词: database
; fractionation
; global perspective
; inorganic phosphorus
; numerical model
; nutrient availability
; phosphorus
; phosphorus cycle
; transformation
英文摘要: Understanding the soil phosphorus (P) cycle is a prerequisite for predicting how environmental changes may influence the dynamics and availability of P in soil. We compiled a database of P fractions sequentially extracted by the Hedley procedure and its modification in 626 unfertilized and uncultivated soils worldwide. With this database, we applied structural equation modeling to test hypothetical soil P transformation models and to quantify the importance of different soil P pools and P transformation pathways in shaping soil P availability at a global scale. Our models revealed that soluble inorganic P (Pi, a readily available P pool) was positively and directly influenced by labile Pi, labile organic P (Po), and primary mineral P and negatively and directly influenced by secondary mineral P; soluble Pi was not directly influenced by moderately labile Po or occluded P. The overall effect on soluble Pi was greatest for labile Pi followed by the organic P pools, occluded P, and then primary mineral P; the overall influence from secondary mineral P was small. Labile Pi was directly linked to all other soil P pools and was more strongly linked than soluble Pi to labile Po and primary mineral P. Our study highlights the important roles of labile Pi in mediating P transformations and in determining overall P availability in soils throughout the world. ©2016. American Geophysical Union. All Rights Reserved. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/77817
Appears in Collections: 气候变化事实与影响
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作者单位: Key Laboratory of Vegetation Restoration and Management of Degraded Ecosystems, South China Botanical Garden, Chinese Academy of Sciences, Guangzhou, China; Griffith School of Environment, Griffith University, Nathan, QLD, Australia; Institute of Forestry Ecology, Environment and Protection, Chinese Academy of Forestry, Beijing, China; Department of Science, Information Technology and Innovation, Queensland Government, Brisbane, QLD, Australia
Recommended Citation:
Hou E,, Chen C,, Kuang Y,et al. A structural equation model analysis of phosphorus transformations in global unfertilized and uncultivated soils[J]. Global Biogeochemical Cycles,2016-01-01,30(9)