Vol. 12, Issue 6 (2023)

Author(s):
Rishi Kumar Yadav, Divya Singh, Atish Yadav, Rajesh Kumar Singh and Ram Pratap Singh

Abstract:
The experiment was conducted during kharif season of 2021-22 with an objective to study the Real time Nitrogen management in rice. The experiment was laid out in Randomized Completely Block Design with four N levels viz. nitrogen splits @ 90, 120, 150 and 180 kg N ha^-1 managed through LCC (LCC scores of 3, 4 and 5), recommended nitrogen level and control replication four. The results of the experiment revealed that the current recommendation of fixed time split N applications at specified growth time is not adequate to synchronize N supply with actual crop N demand due to poorly designed Nitrogen splitting and variations in crop Nitrogen demand. The result of the experiments revealed that the application of 180 kg N ha^-1 with LCC were significantly superior in terms of growth and yield attributes viz. plant height, LAI, Number of tillers m^-2, Dry matter accumulation, Days taken to different phenological stages, accumulated heat units, effective panicles m^-2, panicle length, panicle weight and fertile grains panicle^-1 nutrient uptake and returns/rupee invested on account of applied nitrogen fertilizer as compared to other LCC scores and recommended nitrogen level during experimentation. The maximum grain yield was recorded with the treatment 180 kg N ha^-1 (based on LCC), noted 57.0 q ha^-1 while minimum grains yield (37.2 q ha^-1) was obtained from Control. The maximum net returns (Rs. 60438.70 ha^-1) was obtained from the 180 kg N ha^-1 (based on LCC) and minimum net returns (Rs 26169.60 ha^-1) was recorded in the control.