Effect of cultivar and time of nitrogen application on grain yield and grain protein content of rice
1990
Islam, N. | Kamal, A.M.A. | Islam, M.R.
The effect of N application at different growth stages of BR14, BR15, and BR16 cultivars of rice as direct seeded aus crops was studied to determine the growth stage(s) most sensitive to N application in terms of grain yield and grain protein content. Although the cultivars were similar with respect to grain yield and grain protein content, BR14 had the tallest plants (100cm) with the shortest growth duration (135 days). Nitrogen fertilization at late tillering stage gave higher grain yield (2.8 t/ha) which resulted from higher tillering ability, higher percentage of tiller survival and greater grain bearing capacity than when N was applied at any other growth stage. Grain protein increased significantly with a delay in N fertilization. Grain protein content was the highest, 7.82%, when N was applied at the anthesis stage.
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