Vol. 11, Issue 6 (2022)

Author(s):
Rahul Chandra, Dr. Sreekanth B, Dr. K Jayalalitha and Dr. T Srinivas

Abstract:
The present investigation was conducted to assess the effect of supplemental application of nitrogen during reproductive stage on yield parameters in groundnut in Agricultural College Farm, Bapatla, Andhra Pradesh. As treatment, 10 kg N ha^-1 was applied during four different reproductive growth stages of groundnut viz., at flowering (30 DAS, 50% plants have open flowers), at peg initiation (50 DAS, 50% plants have at least one elongated peg), at pod initiation (60 DAS, 50% plants have an elongated peg with ovary tip beginning to swell to at least twice peg diameter) and at mid pod development stage (72 DAS, a day at the middle of crop maturity and pod initiation) along with an untreated control with only recommended basal application of nitrogen. These treatments were imposed on groundnut cv TAG-24 in a randomized block design. The results revealed that nitrogen supplementation during reproductive stage contributed to increase in the number of pods produced by the plant as well as the supplementation of nitrogen at flowering stage was found to be most effective compared to other stages in case of pod yield. Maximum absorption and utilization of the supplemented nitrogen, which contributes to seed yield occurred when supplemented at flowering stage. The data on oil content indicated that there was no significant difference observed between treatments and the control.