Vol. 10, Issue 10 (2021)

Author(s):
Rayapati Karthik, Alka Jyoti Sharma and Mainak Ghosh

Abstract:
To identify the suitable precision nitrogen management technique for improving growth and yield among the different rice cultivars under direct seeded condition, a field experiment was conducted at Agriculture Research Farm, Bihar Agricultural University, Sabour, Bhagalpur, Bihar, India during Kharif 2018. The experiment was conducted in split plot design with three rice cultivarssuch as Sabourardhjal, Shushksamrat and Shabhagidhan as main plot treatments and four N management practices as control where no N was applied, fixed time N management (FTNM), real time N management (RTNM) using SPAD meter and adjustable dose of N management (ADNM) through SPAD meter as the sub plot treatments: Results revealed that among the cultivars, the maximum grain yield was obtained in Shushksamrat (3956 kg/ha) which was statistically at par with Shabhagidhan (3752 kg/ha) whereas lowest grain yield was obtained in Sabourardhjal (3213 kg/ha). Among the N management practices, highest grain yield (4177 kg/ha) was recorded in ADNM against 79 kg N/ ha which was at par with grain yield of FTNM (4134 kg/ha) against 100 kg N/ ha. So it can be concluded that using SPAD meter in DSR not only enhanced the production but also can reduced a considerable amount of N application.