Effect of Nitrogen and Water Management on Methane Emission of Boro Rice Cultivation in Bangladesh

Declination of available water resources is threatening the dry season crop production in Bangladesh. Sustainable water management is crucial need to meet future food production. This study was aimed to determine futuristic water management strategy for rice cultivation. Both surface and groundwater is getting scarce in north-west region, whereas abundant of fresh surface water creating opportunities to irrigate dry season crops in south-central region. This study has outlined irrigation management for rice cultivation and groundwater utilization in water scarce area of north-west region. More than 75% of annual rainfall occurred during monsoon and crops other than monsoon often faced water shortage. Timely establishment of T. Aus rice on 01 May accounted average 183 mm supplemental irrigation for north-west and south-west region. Transplanting of T. Aman rice before 24 July found the low risk period of drought and gave about 1 t ha-1 yield advantage than late transplanting after 15 October. Supplemental irrigation in drought year gave up to 26% yield advantage than the rain-fed condition of T. Aman rice in experimental plot. Over exploitation of groundwater by famers for crop cultivation makes the groundwater status worsen. Farmers used 38% excess water than the actual requirement for Boro rice cultivation. For that annual groundwater withdrawal was higher than annual recharge causing groundwater level depletion in most of the districts. Groundwater table went below suction limit of shallow tubewell (STW) during dry season and thus it become unable to operate. Improved distribution system with plastic pipe, buried pipe could save about 25% of irrigation water. Alternate wetting and drying (AWD) irrigation method saved 20-25% water than farmer’s practice. Application of these on-farm water management technologies in Boro rice reduced water demand and made the groundwater balance positive as well as reduced the groundwater withdrawal pressure. On the contrary, irrigation with less saline surface water resources in river and canals of south central regions could expand Boro production and increased land productivity. Intervention of low lift pump with plastic pipe distribution in non-saline tidal areas could increase land productivity. Besides, trapped freshwater in to the canals inside the polders and re-excavation of these canals would make crop intensification. Thus, additional food production could help to achieve sustainable development goal and sustained food security. Bangladesh Rice J. 25 (1) : 37-50, 2021

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Water Management Options for Rice Cultivation in a Temperate Area: A Multi-Objective Model to Explore Economic and Water Saving Results

Water ◽

10.3390/w8080336 ◽

2016 ◽

Vol 8 (8) ◽

pp. 336 ◽

Cited By ~ 13

Author(s):

Federica Monaco ◽

Guido Sali ◽

Manel Ben Hassen ◽

Arianna Facchi ◽

Marco Romani ◽

...

Keyword(s):

Water Management ◽

Water Saving ◽

Rice Cultivation ◽

Management Options ◽

Multi Objective ◽

Temperate Area ◽

Objective Model

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Prediction of future methane emission from irrigated rice paddies in central Thailand under different water management practices

The Science of The Total Environment ◽

10.1016/j.scitotenv.2016.05.145 ◽

2016 ◽

Vol 566-567 ◽

pp. 641-651 ◽

Cited By ~ 9

Author(s):

Kazunori Minamikawa ◽

Tamon Fumoto ◽

Toshichika Iizumi ◽

Nittaya Cha-un ◽

Uday Pimple ◽

...

Keyword(s):

Water Management ◽

Methane Emission ◽

Management Practices ◽

Rice Paddies ◽

Irrigated Rice ◽

Central Thailand

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Appropriate Water Management for Rice Cultivation Using Non-coated Seeds Directly Seeded with a Puddling Seeder

Japanese Journal of Crop Science ◽

10.1626/jcs.89.185 ◽

2020 ◽

Vol 89 (3) ◽

pp. 185-194

Author(s):

Hiroyuki Shiratsuchi ◽

Keiko Ito ◽

Hiromi Imasu ◽

Youichi Ohdaira ◽

Yoshiaki Kawana

Keyword(s):

Water Management ◽

Rice Cultivation

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WATER MANAGEMENT AND METHANE EMISSION FROM RICE CULTIVATION: A CASE STUDY IN AN GIANG PROVINCE, VIET NAM

Vietnam Journal of Science and Technology ◽

10.15625/2525-2518/54/2a/11916 ◽

2018 ◽

Vol 54 (2A) ◽

pp. 91

Author(s):

Duong Mai Linh

Keyword(s):

Water Management ◽

Global Warming ◽

Rice Yield ◽

Soil Surface ◽

Water Levels ◽

Rice Cultivation ◽

Viet Nam ◽

Ch4 Emission ◽

Wetting And Drying

Rice cultivation causes the emission of CH4 consequenced to the global warming. Reduction of irrigation in rice cultivation is not only saving water resources but also reducing greenhouse gases emission. The objectives of this study was to determine impacts of water management on the emission of CH4 and rice yield. Experiment was conducted in field conditions in An Giang province, Viet Nam with three treatments as continuous flooding (CF), An Giang Alternative Wetting and Drying (AAWD) which is mostly applied by farmers in An Giang province-Viet Nam, and Alternate Wetting and Drying (AWD). Water levels in the field +5 cm, ± 5 cm and -15 cm were controlled higher, fluctuated and lower than soil surface, respectively for CF, AAWD and AWD. CH4 emission determined every week during 13 weeks of the experiment. Rice yield was determined in 1 m2 at the end of the experiment. The results showed that AWD and AAWD, respectively decreased 78.7 % (p < 0.05) and 6.8 % (p > 0.05) CH4 emission compared to the CF 11.9 mg CH4/m2/h. The rice yield of CF was 6.32 ton/ha lower than AAWD 7.8 ton/ha (p < 0.05) but not different with AWD 6.67 ton/ha. AAWD had higher rice yield but same emission than the CF. Farmers in An Giang province should consider application of AWD in rice cultivation in term of saving water and reduction of CH4 emission.

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