Vol. 12, Issue 6 (2023)

Author(s):
Sushil Kumar Kothari, Sruba Saha and Parvez Mallick

Abstract:
A field experiment was conducted during Kharif season of 2020-21 at the research farm of School of Agriculture and Allied Sciences (SAAS), The Neotia University. The experiment consisted 5 treatments including basal application of NPK at 80: 40: 40 + broadcasting of N at 40 kg/ha (T₁-control) and replacing broadcasting of N with two-times foliar spray of nano nitrogen at 4 ml litter^-1 (T₂-nano N), nano nitrogen & nano zinc (T₃-nano N & Zn), nano nitrogen & nano copper (T₄-nano N & Cu) and nano nitrogen, nano zinc & nano copper (T₅-nano N, Zn & Cu) in Randomized Block Design with 3 replications. The results of experimental revealed that the rice grain yield significantly increased by 8-12% with T₃ – nano N & Zn, T₅-nano N, Zn & Cu, T₄-nano N & Cu and T₂-nano N over T₁-control. The differences in yield amongst the treatments T₂, T₃, T₄ and T₅, however, were not significantly different indicating no significant advantage of nano Zn and nano Cu applications. Based on all of the studied yield attributing & yield characters it was concluded that two-times foliar application of nano N has significant advantages over broadcasting of N at 40 kg/ha. These results, however, needs further confirmation through conducting multi-locational long term trials supported by nutrient like N, Zn and Cu uptake data in view of significant advantages of nano N fertilizer over traditional N fertilizers like urea, ammonium sulphate, etc.