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State-Space Estimation of the Intrinsic Soil Phosphorus Pools from the Mehlich-3 Test

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成果类型:
期刊论文
作者:
Shuai, Xiufu;Li, Xingming;Yost, Russell S.;Wendroth, Ole
通讯作者:
Li, XM
作者机构:
[Shuai, Xiufu; Li, Xingming] Hubei Province Key Laboratory for Geographical Process Analysis and Simulation, School of Urban and Environmental Science, Central China Normal University, Wuhan, China
[Yost, Russell S.] Department of Tropical Plant and Soil Sciences, University of Hawaii at Manoa, Honolulu, Hawaii, USA
[Wendroth, Ole] Department of Plant & Soil Sciences, University of Kentucky, Lexington, Kentucky, USA
通讯机构:
[Li, Xingming] Cent China Normal Univ, Hubei Prov Key Lab Geog Proc Anal & Simulat, Sch Urban & Environm Sci, 152 Luoyu Rd, Wuhan 430079, Hubei Province, Peoples R China.
Hubei Province Key Laboratory for Geographical Process Analysis and Simulation, School of Urban and Environmental Science, Central China Normal University, Wuhan, China
语种:
英文
关键词:
Intrinsic soil P pools;soil mehich-3 extractable P;state-space models
期刊:
Communications in Soil Science and Plant Analysis
ISSN:
0010-3624
年:
2016
卷:
47
期:
8
页码:
1058-1068
文献类别:
WOS:Article
所属学科:
ESI学科类别:农业科学;WOS学科类别:Agronomy;Chemistry, Analytical;Plant Sciences;Soil Science
入藏号:
机构署名:
本校为第一且通讯机构
院系归属:
城市与环境科学学院
摘要:
Widely popular Mehlich-3 phosphorus (P) was not used in the estimation of the intrinsic status of soil P. The objectives of this study were to develop the state-space model to determine the intrinsic soil P pools, a weakly adsorbed P pool, and a tightly adsorbed P pool, from the Mehlich-3 P. A linear relationship between Mehlich-3 P and the intrinsic soil P pools was derived from theoretical analysis of the extraction process of adsorbed P as competitive exchange by aqueous fluoride. Adsorption experiments of soil P were carried out to determine the dynamics of Mehlich-3 P after fertilizer phosphate was applied to soils. The results showed that state-space models of the two soil P pools could describe the dynamics of soil Mehlich-3 P in P adsorption experiments. Mehlich-3 P was a fraction of the weakly adsorbed P, and this fraction showed a linear relationship with soil P-sorption site density.
参考文献:
BARROW NJ, 1975, SOIL SCI, V119, P167, DOI 10.1097/00010694-197502000-00010
BARYOSEF B, 1988, SOIL SCI, V145, P194, DOI 10.1097/00010694-198803000-00006
BORGGAARD OK, 1983, CLAY CLAY MINER, V31, P230, DOI 10.1346/CCMN.1983.0310309
COX FR, 1994, SOIL SCI SOC AM J, V58, P1249, DOI 10.2136/sssaj1994.03615995005800040036x
COX FR, 1984, COMMUN SOIL SCI PLAN, V15, P1481, DOI 10.1080/00103628409367574

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