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Nitrogen application in direct wet-seeded rice under alternate wetting and drying irrigation condition: Effects on grain yield, dry matter production, nitrogen uptake and nitrogen use efficiencies



Nitrogen application in direct wet-seeded rice under alternate wetting and drying irrigation condition: Effects on grain yield, dry matter production, nitrogen uptake and nitrogen use efficiencies



Journal of Plant Nutrition 40(17): 2477-2493



Yield, dry matter production, nitrogen (N) uptake and nitrogen use efficiency (NUE) of Bangladesh Rice Research Institute (BRRI) dhan29 were investigated during two consecutive dry (Boro) seasons of 2009-10 and 2010-11. The experiments were set up in a randomized complete block design with three replication having six nitrogen (N) levels of 0, 40, 80 120, 160 and 200kg ha(-1). Nitrogen fertilization increased yield characters, dry matter production and N uptake. The economic optimum rate of N was 166 and 155kg ha(-1) in first and second year, respectively, with corresponding yield of 7.1 and 6.5 t ha(-1). NUEs were higher in the first year, decreased with increasing N rates in most cases. Gross return over fertilizer reached the highest Tk 692 in 2009-10 and Tk 489 in 2010-11 with 160kg N ha(-1). The results suggest that BRRI dhan29 should receive an average of 160kg N ha(-1) for economic optimum yield.

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Accession: 066347709

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DOI: 10.1080/01904167.2017.1380826



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