EFFECT OF NITROGEN FERTILIZER MANAGEMENT ON GRAIN YIELD AND YIELD COMPONENTS OF RICE CULTIVARSE. Azarpour, E. Amiri, N. Khodabande, A. Kashani and M. Moradi
In order to study the effects of nitrogen fertilizer on yield and yield components of rice cultivars (Oryza sativa L.), an experiment as factorial in RCBD with three replications was conducted during 2009 year in the Rice Research Institute, Iran, central of Guilan and Rudsar, East of Guilan. Factors were cultivar (Khazar, Ali Kazemi and Hashemi), and nitrogen fertilizer levels (0, 30, 60, and 90 Kg N/ha). Results indicated that location, cultivar and N fertilizer significantly effected on seed yield. Khazar and Ali Kazemi have the highest grain yield among cultivars. Also, Results indicated with increasing N fertilizer application, grain yield increased significantly. Among yield components, number of tillers, number of panicle, plant height and biomass were significantly affected by N fertilizer. Among the mentioned traits, number of tillers, number of panicle, number of unfilled grain per panicle and biomass had the highest correlation with grain yield.
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