Effect of chemical and nano potassic fertilizers on potassium availability at different incubation periods

Abstract

An incubation experiment was conducted during summer 2017 at Department of Agril. Chemistry & Soil Science, College of Agriculture, JAU, Junagadh. This study has been undertaken to investigate effect of different levels (0, 200, 400 and 600 ppm) of nano and chemical potassic fertilizers at various incubation periods (15th, 30th, 45th, 60th, 75th, 90th, 105th, 120th, 135th and 150th) on potassium availability and water soluble potassium. The time of incubation had the pronounced effect of potassium availability. The potassium availability from both nano and chemical potassic fertilizers increased with increasing days of incubation periods, but increment was found up to 30th days in chemical potassic fertilizer. While, in case of nano fertilizer treated soil, the increment was found up to 60th days of incubation periods, then it was declined in both the cases. The availability of potassium seems to have direct relationship with quantity of applied potassium. The results of incubation study clearly indicated that the availability of potassium was higher with nano fertilizer treated soil as compare to chemical fertilizer applied to soil at all the incubation periods.