rice-rice-rabi systems for low salinty regions of the coastal zone of bangladesh
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By J. Bhattacharya, M.K. Mondal, E. Humphreys, M.H. Rashid, P.L.C. Paul, S.P. Ritu Revitalizing the Ganges Coastal Zone Conference 21-23 October 2014, Dhaka, Bangladesh http://waterandfood.org/ganges-conference/TRANSCRIPT
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J. Bhattacharya, M. K. Mondal, E. Humphreys, M. H. Rashid, P. L. C. Paul and S. P. Ritu
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Jun Jul Aug Sep Oct Nov Dec Jan Feb Mar Apr May Jun
Local Rice Varity(2-3 t/ha)
Mungbean/Grass Pea (0.5-1.0 t/ha
Traditional Cropping System (Farmers’ Practice)
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Objectives
➢ feasibility of Rice-Rice-Rabi system
➢ can we fit 3 high yielding crops together?
➢ optimum sowing date for maximum
system productivity?
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Proposed cropping pattern
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Weed ManagementHand weeding – plots kept weed free
Disease and Insect Management
Recommended practice when needed
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BRRI & BARI , 2011
Rice- ¼ N + all fertilizers- Basal, MT, 5-7 dB PIMaize- 1/3 N + all fertilizer- Basal, 25-30, 45-50 DASSunflower- 1/3 N + all fertilizer-Basal, 20-25, 40-45 DAS
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Water Management
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Crop monitoring
Rice Maize Sunflower
Phenology & Biomass
Mid tilleringPanicle initiation
(PI)Flowering
Physiological maturity (PM)
8-9 L, tasselling-silking, mid-grain
filling, PM
8-9 L, heading, seed
development, PM
Yield and yield contributing character
Panicles/m2
Sterility %1000 GW
Cobs/plant, cob length, ear/cob,
1000 EW
Head diameter, seed setting percentage, seeds/head,
1000 SWGrain yield Grain yield Cob yield Seed yield
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Results
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❑ Duration of crops in fieldSunflower- 305 d Maize 321 dAus-aman-rabi is FEASIBLE where
- able to drain & thus grow HYV aman- fresh water for irrigation of rabi crops
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A M J J A S O N D J F M A
Sunflower/Maize
System production 14.1 to 19.5 t/ha/yr (3-4 times than farmers’
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✓
✓
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