Effects of organic amendments and incubation time on the amelioration of saline soils
2019
M. Z., Hossain | F., Akter | K.Q. Kibria
Rice hull and saw dust at rates of 3, 6 and 9 t ha-¹ (designated as T1, T2 and T3 for rice hull and T4, T5 and T6 for saw dust, respectively) were applied separately to Bajoa and Dumuria soils to evaluate their reclamation potentiality of salinity through estimation of physico-chemical attributes of the soils. The pH of both soils was not significantly influenced by the amendments. The EC values of both the soils were significantly (p≤0.05) decreased and the reductions were more pronounced in the Bajoa soil. The values of sodium adsorption ratio (SAR) were found to decrease for all the treatments in both the soils and followed the order of T6 >T3 > T5> T2 > T4>T1 in the Bajoa soil and T2 > T3 > T6 > T1 > T5 > T4 in the Dumuria soil. Sodium removal efficiency was reduced significantly (p≤0.05) at the highest dose (9 t ha-¹). The treatments showed significant (p≤0.01) effects on exchangeable cations at different periods of incubation. During the incubation, the concentration of Na showed a remarkable decrease while K, Ca and Mg concentrations showed an increasing trend in both soil types.
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