Effect of Graded Levels of Nitrogen Application on Yield and Yield Attributes in Different Rice Varieties

Abstract

As the application of nitrogen fertilizers in agriculture is increasing day by day which is leading to environmental pollution and increasing the cost of cultivation, a field experiment was conducted at IIRR farm, Rajendranagar, Hyderabad during three consecutive seasons (Kharif-2020, Rabi-2021 and Kharif-2021) to study the effect of different nitrogen levels application on yield and yield attributes in rice. The experiment was laid out in split plot design with four nitrogen levels as main plots, fourteen varieties as sub plots and replicated thrice. Among the nitrogen treatments N150 recorded highest number of panicles, more panicle length and higher grain yield which is on par with N100. N0 recorded lowest number of panicles, less panicle length, lowest grain yield and harvest index. Among the varieties highest 1000 grain weight was noticed in Birupa while N-22 in Kharif-2020 and Kharif-2021 and, Nidhi in Rabi-2021 recorded the lowest value. Birupa showed least reduction in grain yield with N50 compared to N100 in all three tested seasons. MTU-1010 recorded highest grain yield whereas lowest grain yield was noticed in N-22. Higher harvest index was observed in MTU-1010 in Kharif-2020 and Rabi-2021 and, IR-64 in Kharif-2021 while lowest value was recorded in N-22 in Kharif-2020 and Rabi-2021 and, Nidhi in Kharif-2021.