Effect of different doses and method of application on nitrogen use efficiency (NUE) in rice (Oryza Sativa L.)

Abstract

In India, rice is grown during kharif season and losses of applied N through leaching may be decreased through proper rate and timing of N application. However, appropriate source of N fertilizer, rate and time of application may improve N fertilizer use efficiency of the crop. Furthermore, effective rate of application for slow N releasing fertilizer like polymer coated urea (PCU) for increasing rice productivity at Varanasi districts has not been established. Therefore, A field experiment was conducted with 12 treatments and 3 replications of control, 100% of RDN through normal urea as a single basal dose and as in 3 split, and 100%, 85%, 70% and 55% RDN through PCU as single basal doses and as in 3 split under randomized block design (RBD) on rice variety HUR-105 during kharif season 2016. The last treatment (T12) was comprising with 55% of RDN through PCU as basal dressing + 2 tons FYM ha-1 + PGPR (mixture of Azotobactorchroococcum, Pseudomonas aeruginosa, Pseudomonas flurescens, Pseudomonas putida, Bacillus subtilis, Azospirillumbrasilense, Trichodermaharzianum).