Long-term dynamics of phosphorus forms and retention in manure-amended soils

CORC > 新疆生态与地理研究所 > 中国科学院新疆生态与地理研究所 > 中国科学院新疆生态与地理研究所(2010年以前数据)

	Long-term dynamics of phosphorus forms and retention in manure-amended soils
	Lehmann ; Johannes1 ; Lan ; Zhongdong1 ; 2 ; Hyland ; Charles1 ; Sato ; Shinjiro1 ; Solomon ; Dawit1 ; Ketterings ; Quirine M.1
刊名	Environmental Science and Technology
	2005
卷号	39 期号:17 页码:6672-6680
关键词	Concentration (process) - Lakes - Leaching - Phosphates - Soils - Phosphoruc forms - Phosphoruc leaching - Total dissolved P (TDP) - Unreactive phosphorus (UP)
ISSN号	0013-936X
中文摘要	Phosphorus (P) leaching from soils with elevated P levels due to manure applications is increasingly becoming a concern as a source of eutrophication of streams and lakes. This study investigates the relationship between organic and inorganic P in soil pools and equilibrium leachate along a chronosequence of poultry and dairy manure additions in New York state. Resin-extractable P(molybdate-reactive P, RP) and total soil P reached very high levels of 2330 and 7343 mg of P kg^-1, respectively, after more than 25 years of continuous manure applications. After long-term manuring, the ability of these soils to retain additional P was low (Langmuir maximum sorption potential of 51-59 of P kg^-1) and equilibrium leachate concentrations of total dissolved P (TDP) were high (5.5-7.6 mg L^-1; saturated conditions, 0.15-m lysimeters in closed loop). Total dissolved P concentrations in equilibrium leachate increased linearly (r = 0.737) to a total soil P of 4500 mg kg^-1 and increased to a greater extent above 4500-5500 g kg ^-1 (change point equivalent to about 1500 mg kg^-1 Mehlich 3-extractable RP). The proportion of dissolved unreactive P (DUP) in equilibrium leachate decreased from 90% of TDP in fields with a short manure application history to 2% of TDP where mainly poultry manure had been applied for > 25 years, while unreactive P (UP) in soil decreased from 44% to 6%. Dissolved RP (DRP) was less mobile than DUP in soils with short duration of manure applications (p < 0.05), while differences between DUP and DRP mobility disappeared with longer duration of manure application and greater total soil P. Organic P forms in NaOH/NaF extracts determined by ³¹P NMR did not change with manure history, but sequential fractionation showed that the relative distribution of RP pools in soils changed. Dilute acid P, increased from 10% to 62% with longer poultry manure additions, suggesting the formation of calcium phosphates as the soil pH increased from 4.1 to 6.0-7.2. The precipitation of P as calcium phosphates appeared to influence leachable P upon high and long-term applications of manure dominated by poultry litter. © 2005 American Chemical Society. (65 refs.)
学科主题	园艺学
收录类别	EI
公开日期	2011-08-19
内容类型	期刊论文
源URL	[http://ir.xjlas.org/handle/365004/10718]
专题	新疆生态与地理研究所_中国科学院新疆生态与地理研究所(2010年以前数据)
推荐引用方式 GB/T 7714	Lehmann,Johannes1,Lan,et al. Long-term dynamics of phosphorus forms and retention in manure-amended soils[J]. Environmental Science and Technology,2005,39(17):6672-6680.
APA	Lehmann.,Johannes1.,Lan.,Zhongdong1.,2.,...&Quirine M.1.(2005).Long-term dynamics of phosphorus forms and retention in manure-amended soils.Environmental Science and Technology,39(17),6672-6680.
MLA	Lehmann,et al."Long-term dynamics of phosphorus forms and retention in manure-amended soils".Environmental Science and Technology 39.17(2005):6672-6680.