Vol. 10, Issue 5 (2021)

Author(s):
Sachidananda Muni

Abstract:
A field experiment was conducted in the year 2019 and 2020 during the Rabi seasons at the Instructional Farm (IF), Odisha University of Agriculture and Technology (OUAT), Bhubaneswar, Odisha to study the effect of cumulative application of fly ash (FA) in conjunction with NPK fertilizers and farm yard manure (FYM) on the elemental status of rice (Oryza Sativa) cv. CR Dhan (Mukul)’. It was observed that the macronutrient N in 2019 varied from 1.34% to 1.54% and decreased in 2020 from 1.23% to 1.41%. P varied from 0.26% to 0.35% in 2019 and from 0.26 to 0.36% in 2020 where as K content varied from 0.49% to 0.56% in 2019 and from 0.50% to 0.61% in 2020. In 2019, the micronutrient Fe varied from 70.11 ppm to 71.00 ppm and from 68.15 ppm to 72.13 ppm in 2020. Except the treatments receiving 50% RD and 40t FA/ ha and with FYM, Fe content recorded a decrease in the year 2020. In case of Mn, it varied from 51.12 ppm to 54.02 ppm in 2019 and from 53.13 ppm to 55.70 ppm in 2020. Except the treatments receiving RD + 40t FA/ ha, 50% RD + 20t FA/ ha and with FYM, all the treatments showed a decreasing trend in the succeeding year. Zn varied from 33.71 ppm to 35.89 ppm in 2019 and from 34.01 ppm to 36.18 ppm in 2020. It increased in all the treatments in 2020 except the dose receiving 40t FA/ ha.