Abstract
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.
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Claims 7
Claim · model-written summary
Methane emission was highest under continuous standing water (CSW) compared with alternate wetting and drying (AWD).
Verbatim
e0“examined the responses of nitrogen and water management on methane emission of Boro rice”
e4“The highest CH4 emission was found from CSW plots and the lowest from AWD plots”
Claim · model-written summary
Methane emission was lowest under alternate wetting and drying (AWD) compared with continuous standing water (CSW).
Verbatim
e0“examined the responses of nitrogen and water management on methane emission of Boro rice”
e4“The highest CH4 emission was found from CSW plots and the lowest from AWD plots”
Claim · model-written summary
Under CSW, the effects of urea treatments on CH4 emission were not significant.
- Taxon
- Boro ricee0
- Treatment
- urea treatmentse5
- Outcome
- CH4 emissione5
- Direction
- no_changeinferrede5
- Qualifier
- Under CSW conditione5
Not reportedComparator
Verbatim
e0“examined the responses of nitrogen and water management on methane emission of Boro rice”
e5“Under CSW condition, the effects of urea treatments on CH4 emission were not significant”
Claim · model-written summary
Under CSW, T3 (prilled urea) gave the highest CH4 emission among the urea treatments.
- Taxon
- Boro ricee0
- Treatment
- Prilled urea (104 kg N/ha)e2
- Outcome
- CH4 emissione6
- Direction
- higheste6
- Qualifier
- under CSW conditione6
Not reportedComparator
Verbatim
e0“examined the responses of nitrogen and water management on methane emission of Boro rice”
e2“T3: Prilled urea (104 kg N/ha)”
e6“the highest CH4 emission was observed from treatment T3 under CSW condition and T2 under AWD condition”
Claim · model-written summary
Under AWD, T2 (urea super granule) gave the highest CH4 emission among the urea treatments.
- Taxon
- Boro ricee0
- Treatment
- Urea super granule (78 kg N/ha)e1
- Outcome
- CH4 emissione6
- Direction
- higheste6
- Qualifier
- under AWD conditione6
Not reportedComparator
Verbatim
e0“examined the responses of nitrogen and water management on methane emission of Boro rice”
e1“T2: Urea super granule (78 kg N/ha)”
e6“the highest CH4 emission was observed from treatment T3 under CSW condition and T2 under AWD condition”
Claim · model-written summary
The control treatment gave the lowest emission among the treatments.
Not reportedComparator
Verbatim
e0“examined the responses of nitrogen and water management on methane emission of Boro rice”
e7“the lowest emission was from the control treatment”
Claim · model-written summary
The authors recommend applying prilled urea under AWD and urea super granule under CSW to keep CH4 emission low in irrigated rice.
Verbatim
e0“examined the responses of nitrogen and water management on methane emission of Boro rice”
e1“prilled urea and urea super granule should be applied under AWD and CSW condition, respectively to keep less CH4 emission from irrigated rice agriculture”
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