Response of Levels and Split Application of Nitrogen in Green Manured Wetland Rice (Oryza sativa L.)

A field experiment was conducted during kharif 2006 and 2007 at crop research center, Meerut comprising combination of three levels of nitrogen (viz. 90, 120 and 150 kg N ha-1) and four methods of nitrogen application (viz. % basal, % at tillering and % at PI; % basal, % at tillering and % at PI; % each at basal, tillering, PI and flowering; % at tillering, % at PI and flowering) in green manured wetland rice field. The experiment was laid down in Randomized Block Design with three replications. The grain yield of rice was highest with 120 kg N ha-1 (47.82 q/ha), which was statistically at par with 150 kg N ha-1 (49.71 q ha-1) and among different methods of nitrogen application, % basal, % at tillering and % at PI it was recorded 49.76 q ha-1. In general, nitrogen application up to 120 kg N ha-1 in green manured wetland rice field had significant effect on growth characters (viz. plant height, shoot numbers and dry matter accumulation), yield attributes, yield and N-uptake. The above character recorded maximum values with nitrogen application as % basal, % at tillering and % at PI followed by nitrogen application as % basal, % at tillering and % at PI stages. In the light of above findings it can be concluded that nitrogen application of 120 kg N ha-1 applied in three splits as % basal, % at tillering and % at PI stage in green manured wetland rice field is beneficial for rice crop.