Standardization of nitrogen levels and scheduling in dry converted wet rice system

Abstract

The field study was conducted at the Regional Agricultural Research Station, Jagtial on the standardization of Nitrogen levels and their schedules in a dry-converted wet rice system. The research study was carried out in split plot design with 3 nitrogen levels (N1-120 kg ha-1, N2-140 kg ha-1, N3-160 kg ha-1) in main plots and 4 nitrogen schedulings (S1-Basal (0 Seedling stage)- 25 DAS (1/4 tillering stage)-50 DAS (1/2 Panicle initiation stage)- 80 DAS (1/4, Heading stage), S2- Basal (0)- 25 DAS (1/4)-50 DAS (1/4)- 80 DAS (1/2), S3- Basal (1/4)- 25 DAS (1/4)-50 DAS (1/4)- 80 DAS (1/4), S4- Basal (1/5)- 25 DAS (1/5)-50 DAS (2/5)- 80 DAS (1/5)) in subplots. The experiment results revealed that the grain yield was higher at the nitrogen levels of 140 (N2 – 6572 & 7082 kg ha-1 2019; 2020) and 160 (N3 - 7303 kg ha-1) kg ha-1, while among the nitrogen schedules grain yield was higher under S4 (7171 &7284 kg ha-1 2019; 2020) which was on par with S3 (6327&6683 kg ha-1 2019; 2020).