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Published online 9 August 2006
Published in J Environ Qual 35:1855-1862 (2006)
DOI: 10.2134/jeq2005.0420
© 2006 American Society of Agronomy, Crop Science Society of America, and Soil Science Society of America
677 S. Segoe Rd., Madison, WI 53711 USA
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Sorption Dynamics of Organic and Inorganic Phosphorus Compounds in Soil

A. S. Berg and B. C. Joern*

Department of Agronomy, 915 W. State Street, Purdue University, West Lafayette, IN 47907


Figure 1
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  		Fig. 1. Ball-and-stick structural model of (A) phosphate, (B) glucose-6-phosphate, (C) adenosine triphosphate, and (D) inositol hexaphosphate. Black balls are O atoms, dark gray balls are P, light gray balls are C, white balls are H, and the dark gray balls of adenine in the ring of adenosine triphosphate are N.

 

Figure 2
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  		Fig. 2. Inorganic phosphorus desorption for inositol hexaphosphate (IP6), adenosine triphosphate (ATP), and glucose-6-phosphate (G6P) noncompetitive isotherms. Error bars indicate the standard error of the mean.

 

Figure 3
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  		Fig. 3. Total P sorbed for each isotherm at equivalent total P additions. Total P additions for competitive isotherms have equimolar contributions from each P source. Error bars indicate the standard error of the mean.

 

Figure 4
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  		Fig. 4. Sodium phosphate, Na–ATP, Na–G6P, and Na–IP6 noncompetitive and combined isotherms sorbed at equivalent P additions for the Sleeth soil. Phosphorus additions for the combined isotherm are based on the P added by each source. Error bars indicate the standard error of the mean.

 




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