Effect of moisture regimes on ion sorption in old Brahmaputra floodplain soil
2000
Khanom, R. | Mian, M.J.A. | Rahman, M.M. | Islam, M.R. (Bangladesh Agricultural Univ., Mymensingh (Bangladesh). Dept. of Soil Science)
A laboratory experiment was carried out on ion [viz. NH4+, K+, Ca2+, P(HPO42 + H2PO4), SO4 and NO3] sorption behaviour of Old Brahmaputra Floodplain soil with a view to examine the amount of ion sorbed by soil when recommended doses of N, P, K and S fertilizers are applied at different moisture regimes, i.e., 5 cm standing water (low concentration) saturated condition (medium concentration) and field capacity (high concentration). Results showed that there was a wide variation in ion sorption for different moisture regimes as well as times. In general, the sorption of different cations and anions increased with the increase in ionic concentration i.e. ionic strengths of the solution and the maximum sorption was found at saturated condition (medium concentration). The sorption of Ca ion was the highest followed by NH4 ion and K ion. Among the anions the P sorption was the highest followed by NO ion and SO4 ion.
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