rice-rice-rabi systems for low salinty regions of the coastal zone of bangladesh
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Post on 01-Jul-2015
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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
J. Bhattacharya, M. K. Mondal, E. Humphreys, M. H. Rashid, P. L. C. Paul and S. P. Ritu
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)
Objectives
➢ feasibility of Rice-Rice-Rabi system
➢ can we fit 3 high yielding crops together?
➢ optimum sowing date for maximum
system productivity?
Proposed cropping pattern
Weed ManagementHand weeding – plots kept weed free
Disease and Insect Management
Recommended practice when needed
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
Water Management
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
Results
❑ 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
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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