Sorption dynamics of organic and inorganic phosphorus compounds in soil Export

@article{Berg06, abstract = {Phosphorus retention in soils is influenced by the form of P added. The potential impact of one P compound on the sorption of other P compounds in soils has not been widely reported. Sorption isotherms were utilized to quantify P retention by benchmark soils from Indiana, Missouri, and North Carolina when P was added as inorganic P (Pi) or organic P (?-D-glucose-6-phosphate, G6P; adenosine 5?-triphosphate, ATP; and myoinositol hexaphosphate, IP 6) and to determine whether soil P sorption by these organic P compounds and Pi was competitive. Isotherm supernatants were analyzed for pH and total P using standard protocols, while Pi and organic P compounds were assayed using ion chromatography. Under the controlled conditions of this study, the affinity of all soils for P sources followed the order IP6 > G6P > ATP > Pi. Each organic P source had a different potential to desorb Pi from soils, and the order of greatest to least Pi desorption was G6P > ATP > IP6. Glucose-6-phosphate and ATP competed more directly with Pi for sorption sites than IP6 at greater rates of P addition, but at the lesser rates of P addition, IP6 actually desorbed more Pi. Inositol hexaphosphate was strongly sorbed by all three soils and was relatively unaffected by the presence of other P sources. Decreased total P sorption due to desorption of Pi can be caused by relatively small additions of organic P, which may help explain vertical P movement in manured soils. Sorption isotherms performed using Pi alone did not accurately predict total P sorption in soils. {\copyright} ASA, CSSA, SSSA.}, address = {Department of Agronomy, Purdue University, 915 W. State Street, West Lafayette, IN 47907, United States}, author = {Berg, A. S. and Joern, B. C.}, citeulike-article-id = {2231349}, citeulike-linkout-0 = {http://dx.doi.org/10.2134/jeq2005.0420}, citeulike-linkout-1 = {http://www.scopus.com/record/display.url?view=extended&origin=resultslist&eid=2-s2.0-33749331581}, doi = {10.2134/jeq2005.0420}, journal = {Journal of Environmental Quality}, keywords = {atp, sorption}, number = {5}, pages = {1855--1862}, posted-at = {2008-01-14 18:15:22}, priority = {2}, title = {Sorption dynamics of organic and inorganic phosphorus compounds in soil}, url = {http://dx.doi.org/10.2134/jeq2005.0420}, volume = {35}, year = {2006} }

TY - JOUR ID - Berg06 L3 - citeulike-article-id:2231349 N2 - Phosphorus retention in soils is influenced by the form of P added. The potential impact of one P compound on the sorption of other P compounds in soils has not been widely reported. Sorption isotherms were utilized to quantify P retention by benchmark soils from Indiana, Missouri, and North Carolina when P was added as inorganic P (Pi) or organic P (?-D-glucose-6-phosphate, G6P; adenosine 5?-triphosphate, ATP; and myoinositol hexaphosphate, IP 6) and to determine whether soil P sorption by these organic P compounds and Pi was competitive. Isotherm supernatants were analyzed for pH and total P using standard protocols, while Pi and organic P compounds were assayed using ion chromatography. Under the controlled conditions of this study, the affinity of all soils for P sources followed the order IP6 > G6P > ATP > Pi. Each organic P source had a different potential to desorb Pi from soils, and the order of greatest to least Pi desorption was G6P > ATP > IP6. Glucose-6-phosphate and ATP competed more directly with Pi for sorption sites than IP6 at greater rates of P addition, but at the lesser rates of P addition, IP6 actually desorbed more Pi. Inositol hexaphosphate was strongly sorbed by all three soils and was relatively unaffected by the presence of other P sources. Decreased total P sorption due to desorption of Pi can be caused by relatively small additions of organic P, which may help explain vertical P movement in manured soils. Sorption isotherms performed using Pi alone did not accurately predict total P sorption in soils. © ASA, CSSA, SSSA. IS - 5 JF - Journal of Environmental Quality AD - Department of Agronomy, Purdue University, 915 W. State Street, West Lafayette, IN 47907, United States EP - 1862 TI - Sorption dynamics of organic and inorganic phosphorus compounds in soil VL - 35 SP - 1855 KW - atp KW - sorption AU - Berg, AS AU - Joern, BC PY - 2006/// UR - http://dx.doi.org/10.2134/jeq2005.0420 ER -