Title: RESPONSES OF SOME PROMISING HIGH-YIELDING RICE VARIETIES TO NITROGEN FERTILIZER
Abstract:The field experiment was laid out in a split-plot design with three replications at the CLRRI farm in the 2004 Wet and Dry seasons. In the Wet season, main plots consisted of five rates of nitrogen fe...The field experiment was laid out in a split-plot design with three replications at the CLRRI farm in the 2004 Wet and Dry seasons. In the Wet season, main plots consisted of five rates of nitrogen fertilizers i.e. control (0 kg N/ha), 30, 60, 90 and 120 kg N/ha. In the Dry season, five rates of nitrogen fertilizers were control (0 kg N/ha), 40, 80, 120, 160 kg N/ha. Subplots consisted of five rice varieties for both season i.e. OMCS2000, OM2718, OM3419, OM3238 and OM4872. Seed was applied at 100 kg/ha by row seeder. Phosphorus fertilizer was applied at 50 kg P2O5/ha at the time of final puddling. Potassium fertilizer was applied at 50 kg K2O/ha at 7-8 DAS and 42 DAS. The results of study showed that application of nitrogen fertilizer at 60 kg N/ha obtained the highest economical efficiency in the Wet season for all tested rice varieties. Further increase in the rate of nitrogen fertilizer beyond 90 kg N/ha gave a negative EENA value. In the Dry season, at 80 kg N/ha, EENA obtained the highest for all tested rice varieties. At higher nitrogen rates (120-160 kg N/ha), EENA values were lowest.Read More
Publication Year: 2006
Publication Date: 2006-01-01
Language: en
Type: article
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Cited By Count: 7
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