PERFORMANCE OF HYBRID RICE (ORYZA SATIVA L.) ASINFLUENCED BY NITROGEN LEVELS AND BIOFERTILIZERSGayathri Anamalagundam, Mamatha Rangani, Sreenivasa Chari Matla,V.P. Usadadiya, P.B. Patel and Santhosh Kumar Naik B.
A field study was conducted during summer season at Main Rice Research Station, Navsari to assess theperformance of hybrid rice (Oryza sativa L.) as influenced by different N levels and biofertilizers undersouth Gujarat condition. The field trial was carried out in randomized block design with eight treatments(N1: 80 kg N/ha, N2: 100 kg N/ha, N3: 120 kg N/ha, N4: 140 kg N/ha, N5: N1 + Azospirillum, N6: N2 +Azospirillum, N7: N3 + Azospirillum, N8: N4 + Azospirillum) and three replications. Application of 140 kg N/ha in conjunction with Azospirillum produced significantly highest plant height, total tillers hill-1, effectivetillers hill-1, LAI, CGR. The same treatment also attained highest length of panicle, panicles m-2, panicleweight, grains panicle-1, grain yield (4629 kg/ha), straw yield (5632 kg/ha) and harvest index of hybridrice. The Grain and straw yields were increased to the tune of 123 and 72%, respectively with higher N level+ Azospirillum (N8) over lower N level and without Azospirillum (N1), however, it was statistically at parwith N4 and N7 with respect to grain yield. The treatments were failed to record any significant effect on thelength of panicle and test weight. The highest economic benefit was recorded with the treatment N8 overother tested treatments.