HOME HELP FEEDBACK SUBSCRIPTIONS ARCHIVE SEARCH TABLE OF CONTENTS		QUICK SEARCH:   [advanced] Author: Keyword(s): Year:  Vol:  Page:

This Article Full Text (PDF) Alert me when this article is cited Alert me if a correction is posted Services Similar articles in this journal Alert me to new issues of the journal Download to citation manager Citing Articles Citing Articles via HighWire Citing Articles via Google Scholar Google Scholar Articles by Lopez-Hernandez, D. Articles by Rodriguez, J. V. Search for Related Content PubMed Articles by Lopez-Hernandez, D. Articles by Rodriguez, J. V. Agricola Articles by Lopez-Hernandez, D. Articles by Rodriguez, J. V.

Competitive Adsorption of Phosphate with Malate and Oxalate by Tropical Soils¹

ABSTRACT

A study about the competition between organic anions (oxalate and malate)—currently present in the rhizosphere and phosphate for adsorption sites in tropical soils—indicate that in the presence of organic anions, phosphate adsorption by soils is reduced. The extent of such reduction is dependent on the way in which either phosphate or the organic anion are added to the soil. The organic oxyanions studied are more rapidly adsorbed to the soil surface than the phosphate; consequently those anions, when existing in the rhizosphere, can improve the phosphate status of soil.

¹ Contribution from the Laboratorio de Estudios Ambientales IZT, Facultad de Ciencias UCV. This work was supported by CONICIT Proyecto 0460 and CDCH.

² Professor and Soil Scientist. Laboratorio de Estudios Ambientales IZT, Fac. de Ciencias Caracas UCV., Instructor Fac. Ingenieria UCV and Quimico INTEVEP Los Teques, respectively.

Received for publication August 12, 1985.

This article has been cited by other articles:

				Y. Wang, Y. He, H. Zhang, J. Schroder, C. Li, and D. Zhou Phosphate Mobilization by Citric, Tartaric, and Oxalic Acids in a Clay Loam Ultisol Soil Sci. Soc. Am. J., September 1, 2008; 72(5): 1263 - 1268. [Abstract] [Full Text] [PDF]

				A. A. Jara, A. Violante, M. Pigna, and M. de la Luz Mora Mutual Interactions of Sulfate, Oxalate, Citrate, and Phosphate on Synthetic and Natural Allophanes Soil Sci. Soc. Am. J., February 2, 2006; 70(2): 337 - 346. [Abstract] [Full Text] [PDF]

				S. E. Johnson and R. H. Loeppert Role of Organic Acids in Phosphate Mobilization from Iron Oxide Soil Sci. Soc. Am. J., January 6, 2006; 70(1): 222 - 234. [Abstract] [Full Text] [PDF]

				C. N. Guppy, N. W. Menzies, F. P. C. Blamey, and P. W. Moody Do Decomposing Organic Matter Residues Reduce Phosphorus Sorption in Highly Weathered Soils? Soil Sci. Soc. Am. J., August 4, 2005; 69(5): 1405 - 1411. [Abstract] [Full Text] [PDF]

				J. C. Seaman, J.S. Arey, and P. M. Bertsch Immobilization of Nickel and Other Metals in Contaminated Sediments by Hydroxyapatite Addition J. Environ. Qual., March 1, 2001; 30(2): 460 - 469. [Abstract] [Full Text] [PDF]

				H.K. Pant and K.R. Reddy Hydrologic Influence on Stability of Organic Phosphorus in Wetland Detritus J. Environ. Qual., March 1, 2001; 30(2): 668 - 674. [Abstract] [Full Text] [PDF]

				H. Wijnja and C.P. Schulthess Interaction of Carbonate and Organic Anions with Sulfate and Selenate Adsorption on an Aluminum Oxide Soil Sci. Soc. Am. J., May 1, 2000; 64(3): 898 - 908. [Abstract] [Full Text]