Determination of cation exchange capacity of ryegrass roots by summing exchangeable cations

descriptionPublicationkeyboard_double_arrow_right Article 01 May 1989 English Publisher:Springer Science and Business Media LLCJournal:Plant and Soil, volume 116, pages 217-222 (issn: 0032-079X, eissn: 1573-5036,

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Authors: Z. Rengel; D. L. Robinson;

doi: 10.1007/bf02214550

Determination of cation exchange capacity of ryegrass roots by summing exchangeable cations

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Abstract

Cations were desorbed from root exchange sites of ryegrass (Lolium multiflorum Lam. cvs. Gulf, Marshall, Urbana, and Wilo) using BaCl2, BaCl2-triethanolamine, NH4OAc, and KCl. Results were analysed using multivariate analysis of variance. Ba2+-containing desorbents displaced more Ca2+ while monovalent desorbents displaced more exchangeable monovalent cations. The sum of adsorbed cations was significantly correlated with root exchange capacity (CEC) as determined by the H+ titration procedure, although slightly larger values were obtained with all desorbents. Lower CEC values were obtained for ryegrass cultivars less sensitive to Al.

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Louisiana State University Agricultural Center
United States

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