Effect of Potassium Concentrations with Chloride and Sulphate on Potassium Fixation in Haryana Soils

摘要

The amount of K fixation varied from 49.89 to 18.15% in respect of potassium chloride and 75.29 to 23.56% in potassium sulphate when K was applied @ 20 to 1000 mu g/ml. The relative fixation was highest when potassium was applied @ 20 mu g/ml and least was observed when applied @ 1000 mu g/ml indicating more availability of K in the soil. The Chautala soil showed the lowest degree of fixation irrespective of potassium forms. The mechanism of potassium fixation in soil through clays is believed to be the result of precipitation of potassium in the interior of the lattices or due to the concentration of the sheet of clay in consequence entry of K ions. The fixation of potassium at 20 mu g/ml level was the lowest in potassium chloride and highest in potassium sulphate. The different levels of the KCl showed the lowest degree of fixation in the soil suggesting more availability of added K. It was observed that the fixation of potassium in different soil profiles with different anions of potassium was positively and significantly correlated with clay, silt, organic carbon and CEC. The fixation of K was negatively correlated with sand and positively with different levels of applied potassium