Effect of Different Nitrogen Levels on Biochemical Parameters of Rice Genotypes (Oryza sativa L.)

Field experiment was conducted during 2016-17 and 2017-18 to study the response of rice genotypes on Growth and morpho-physiological parameters under three nitrogen levels 120 kg N ha-1, 80 kg N ha-1 and 40 kg N ha-1 as main treatments and twenty rice genotypes as sub treatments, which was carried out at experimental site of Department of Plant Physiology, IGKV, Raipur (C.G.) with Split plot design along with two replications. In the present investigation among the nitrogen treatments, application of 120 kg N ha-1 recorded significantly higher values for growth and morpho-physiological parameters such as plant height, number of tillers/plant, number of effective tillers/ plant, number of panicle/m2, panicle length, flag leaf area, specific leaf area and specific leaf weight. Among the genotypes, DXD (124)-17-193 followed by DXD (124)-17-192 and DXD (124)-3-28 recorded the maximum grain yield even under all the treatments, which also gives better result on the other growth and morpho-physiological parameters. This indicated that maximum yield can be attributed to maximum number of panicles, more photosynthetic rate, more tillers and effective tillers, more flag leaf area, maximum specific leaf weight and minimum specific leaf area.