DOI: 10.1007/s10533-013-9946-x
Scopus记录号: 2-s2.0-84896396747
论文题名: An exploratory analysis of phosphorus transformations in tropical soils using structural equation modeling
作者: Gama-Rodrigues A.C. ; Sales M.V.S. ; Silva P.S.D. ; Comerford N.B. ; Cropper W.P. ; Gama-Rodrigues E.F.
刊名: Biogeochemistry
ISSN: 0168-2563
EISSN: 1573-515X
出版年: 2014
卷: 118, 期: 2018-01-03 起始页码: 453
结束页码: 469
语种: 英语
英文关键词: Factor analysis
; P fractionation
; Soil organic P
; Soil P cycling
; Structural models
Scopus关键词: biotransformation
; factor analysis
; fractionation
; hydroxide
; identification method
; numerical model
; nutrient availability
; phosphorus
; tropical environment
英文摘要: In the tropics, highly weathered soils with high phosphorus (P) fixation capacities predominate, reducing the P availability to plants. For this reason, understanding the cycle of P in the soil is important to develop management strategies that increase P availability to plants, especially in low-input production systems. The aim of this study was to apply structural equation modeling with latent variables, at an exploratory level, to test hypothetical models of the P cycle using data from the Hedley extraction method. Specifically, we evaluated interactions between the pools of P, and identified which pools act as a sink or source of P in unfertilized soils. The models of the P cycle for the tested soil were able to distinguish between the direct and indirect effects of labile and stable P on the available P pool. This approach led to a proposed distinction of functional P pools in the soil, and identifying the processes of P transformation in the soil between the pools based on a source-sink relationship. Based on these analyses, the organic pool consists of the bicarbonate organic phosphate (Po), hydroxide Po, and sonic Po fractions. The bicarbonate inorganic phosphate (Pi) and hydroxide Pi fractions formed the inorganic pool. The hydrochloride (HCl) Phot and residual P fractions formed the occluded pool, the HCl Pi fraction formed the primary mineral pool, and the resin Pi fraction constituted the most available P pool. Organic P pool was the major source to the available P pool. © 2014 Springer Science+Business Media Dordrecht. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/83588
Appears in Collections: 气候减缓与适应 气候变化事实与影响
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作者单位: Soil Laboratory, North Fluminense State University Darcy Ribeiro, UENF/CCTA/LSOL, Av. Alberto Lamego 2000, Campos dos Goytacazes, RJ, CEP 28013-602, Brazil; Mathematics Laboratory, North Fluminense State University Darcy Ribeiro, Campos dos Goytacazes, RJ, CEP 28013-602, Brazil; North Florida Research and Education Center, University of Florida, Quincy, FL, 32351-5677, United States; School of Forest Resources and Conservation, University of Florida, Gainesville, FL, 32611-0410, United States
Recommended Citation:
Gama-Rodrigues A.C.,Sales M.V.S.,Silva P.S.D.,et al. An exploratory analysis of phosphorus transformations in tropical soils using structural equation modeling[J]. Biogeochemistry,2014-01-01,118(2018-01-03)