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Strategies for Cropping System Intensification in a Moderately Saline Region of the Coastal Zone of Bangladesh

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By Sanjida P. Ritu, M.K. Mondal, T.P. Tuong, S.U. Talukdar, E. Humphreys

Revitalizing the Ganges Coastal Zone Conference
21-23 October 2014, Dhaka, Bangladesh
http://waterandfood.org/ganges-conference/

Published in: Government & Nonprofit
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Strategies for Cropping System Intensification in a Moderately Saline Region of the Coastal Zone of Bangladesh

  1. 1. Strategies for Cropping System Intensification in a Moderately Saline Region of the Coastal Zone of Bangladesh Sanjida P. Ritu, M. K. Mondal, T. P. Tuong, S. U. Talukdar, E. Humphreys
  2. 2. Contents  Background  Hypothesis and objectives  Methodology  Results  Conclusion  Recommendation
  3. 3. Study Site: Polder 30, Batiaghata, Khulna, in the southwest coastal zone of Bangladesh Study site
  4. 4. Background  Cropping intensity low  Farmers are poorer  Increase cropping intensity and crop yield will improve livelihood of farmers the coastal areas.
  5. 5. 0 100 200 300 400 Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Rainfall/Evaporation(mm) Rainfall-LT Rainfall0.8 p Evaporation-LT Long term Rainfall and evaporation pattern in Khulna district Lack of fresh water availability and salinity intrusion restricts Dry Season crop cultivation Traditional Rice River water salinity of river kazibacha in in Khulna district
  6. 6. Proposed Cropping Pattern (aus-aman) JanDecNovOctSepAugJulJunMayAprMarFebJanDec RainfallIrrigation (GW) HYV amanHYV ausDry seeding = 8-9 t/ha/yr Use of ground water for supplementary irrigation will secure aus crop establishment Hypothesis a. Replace traditional aman with HYV b. Short duration HYV in aus season • HYV aus -HYV aman cropping system
  7. 7.  aus –aman cropping pattern  Three years (2006-2008) • aus-aman system yield ~8 t/ha/year • dry seeded aus established under three water management scenarios and three seeding dates • rainfall at beginning of rainy season varied greatly across years, affecting aus establishment & performance • dry seeded aus in late April gave good establishment, but may lead to late planting of aman, reducing yield of photosensitive varieties
  8. 8. Hypothesis for 2009 experiment (based on 2006-08 findings) • Late planting (early May) of aus will give good establishment • Transplanting is less risky than direct seeding • photo-insensitive varieties will perform better than sensitive because of delayed establishment due to late planting of aus
  9. 9. Objectives aus-aman 2009  To determine the effect of establishment method on aus yield with delayed seeding  To compare performance of photoperiod sensitive & insensitive aman varieties in aus-aman system for different planting dates
  10. 10. Treatments (Aus) One variety- OM1490 (~ 110 day growth duration) Main-plot: Establishment method M1= Dry seeded M2= Transplanted Sub-plot: Aus establishment dates D1= 30 April (26 May) D2= 10 May (6 June) Design: Strip Plot with 4 replications
  11. 11. Treatments (Aman) Main-plot: Variety V1= BR46 (Photo sensitive) V2= BR49 (Photo insensitive) Sub-plot: transplanting dates D1= 5 September (after 1 week of aus harvest) D2= 11 September Design: Strip Plot with 4 replications
  12. 12. Aus season 2009 (variety: OM1490) TP (26 May) DS (10 May)DS (30 April) TP (6 June)
  13. 13. Aman season 2009 BR49 11 Sept BR46 5 Sept
  14. 14. Grain yield (kg/ha) aus 2009
  15. 15. Grain yield (kg/ha) aman 2009
  16. 16. Yield of aus-aman system 2009 0 2000 4000 6000 8000 10000 12000 30-Apr 11-May 30-Apr 11-May OM1490 DS in aus OM 1490 TP in aus Grainyield(kgha-1year-1) Establishment method and date BR46 BR49NS
  17. 17. • aus can be dry-seeded up to early-May but transplanting should not delay later than end of April • Photo-insensitive aman variety performed better planting until early September • Short duration aus-photo-insensitive aman yield > 9 t/ha/year Conclusion
  18. 18. • More/all farmers need to adopt the system for successful implementation • More germplasm need to develop for increasing the total system productivity rather individual crop season. Recommendations
  19. 19. Thank you Acknowledgement: Financial and technical assistance from CPWF phase1 (PN #10)

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