Different nitrogen rates and methods of application for dry season rice cultivation with alternate wetting and drying irrigation: Fate of nitrogen and grain yield

S.M. Mofijul Islam, Yam Kanta Gaihre, Jatish Chandra Biswas, Md. Sarwar Jahan, Upendra Singh, Sanjoy Kumar Adhikary, M. Abdus Satter and M.A. Saleque

Agricultural Water Management, 2018, vol. 196, issue C, 144-153

Abstract: Improvement of nitrogen use efficiency (NUE) is a challenging task because of its several losses through ammonia volatilization, surface runoff, leaching and nitrification-denitrification. Fertilizer deep placement (FDP) has been proven effective in increasing grain yields and NUE under continuous standing water (CSW) condition. However, the impacts of FDP have not been investigated under alternate wetting and drying (AWD) irrigation. Field experiments were conducted in the dry seasons during 2014–2016 to determine the interaction effect of fertilizer x water regime on N losses as floodwater ammonium and ammonia volatilization, grain yields and NUE. Broadcast prilled urea (PU), deep placement of urea briquettes (UB) and nitrogen-phosphorus-potassium fertilizer briquettes (hereafter NPK) at varied N rates and zero N were tested under AWD and CSW conditions.

Keywords: Fertilizer deep placement; Nitrogen management; Water-saving irrigation; Ammonia volatilization flux; Nitrogen use efficiency; Lowland rice (search for similar items in EconPapers)
Date: 2018
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Citations: View citations in EconPapers (13)

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Persistent link: https://EconPapers.repec.org/RePEc:eee:agiwat:v:196:y:2018:i:c:p:144-153

DOI: 10.1016/j.agwat.2017.11.002

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