Author(s)

Israt Zahan¹, Shahadat Hossen^1*, Akhter Hossain Chowdhury², Abdul Baten¹

¹Department of Environmental Science, Bangladesh Agricultural University, Mymensingh, Bangladesh.
²Department of Agricultural Chemistry, Bangladesh Agricultural University, Mymensingh, Bangladesh.

Water and nitrogen are two key elements required for successful rice cultivation. We examined the responses of nitrogen and water management on methane emission of Boro rice in the field laboratory of Bangladesh Agricultural University research farm, Mymensingh. Three treatments were studied in the field experiment viz, T1: Control plot (no nitrogen fertilizer), T2: Urea super granule (78 kg N/ha), T3: Prilled urea (104 kg N/ha) with three replications under two water management of Continuous Standing Water (CSW) and Alternate Wetting and Drying (AWD). Air samples were collected by the closed-chamber method and methane gas was determined by gas chromatography. The highest CH4 emission was found from CSW plots and the lowest from AWD plots. Under CSW condition, the effects of urea treatments on CH4 emission were not significant. In case of urea treatments, the highest CH4 emission was observed from treatment T3 under CSW condition and T2 under AWD condition and the lowest emission was from the control treatment. The overall results suggest that prilled urea and urea super granule should be applied under AWD and CSW condition, respectively to keep less CH4 emission from irrigated rice agriculture.

Methane, Urea Super Granule, Prilled Urea, Alternate Wetting and Drying, Boro Rice

Zahan, I. , Hossen, S. , Chowdhury, A. and Baten, A. (2018) Effect of Nitrogen and Water Management on Methane Emission of Boro Rice Cultivation in Bangladesh. Journal of Geoscience and Environment Protection, 6, 90-100. doi: 10.4236/gep.2018.67007.