8.2 Innovations in rice cultivation - Alternate wetting and drying


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Nguyen Thi Thanh Phuong, GIZ Bac Lieu

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8.2 Innovations in rice cultivation - Alternate wetting and drying

  1. 1. Page 1ALTERNATE WETTING AND DRYING IRRIGATION4th June 2013Project: Adaptation to climate change through biodiversitypromotion in Bac Lieu province, Vietnam
  2. 2. Page 2In this presentation:• Overview of GIZ Bac Lieu project• Introduction of rice production in Bac Lieu• Alternate Wetting and Drying (AWD) irrigation (IRRI)• AWD application in Bac Lieu province• AWD demonstrations• AWD training courses• Results of AWD implementation• ImpactsGIZ, Bac Lieu, Vietnam
  3. 3. Page 3Contents of the project• Mangrove rehabilitation• Erosion control• Environmental Education• Local communities• Aquaculture• RiceGIZ, Bac Lieu, Vietnam- Alternate Wetting and Drying technology (AWD)- Introduction of Salt Tolerant Rice (STR)
  4. 4. Page 4• Rice production land area:86,000ha• 1 – 2 – 3 rice/crop• 1 rice – shrimp29.05.2013Map source: CLUES projectRice production in Bac Lieu~15.000 ha of rice in the province arethreatened by salt intrusion 2010Not enough water to keep rice fields continuously flooded⇒ Which technology can help farmers cope with water shortage?H6
  5. 5. Slide 4H6 wereHA, 5/20/2013
  6. 6. Page 5AWD Irrigation (IRRI)Safe AWD = Irrigate when water is 15 cm below the surfaceKeep the field flooded (3-5cm): flowering and 20 days after sowing(Source: IRRI)
  7. 7. Page 629.05.2013Research at IRRI confirm:According to IRRI, AWDapplication can:• Reduce pumping times/cost by25%• Reduce water input by 15-30%without yield loss• Reduce rate of lodge• Increase yield due to thelodging reduced (from 20% to10%)• Facilitate harvesting by usingmachine• Reduce greenhouse gas,particularly methane• Be able to use safely onmoderate Acid sulfate soilsAWD Irrigation (IRRI)
  8. 8. Page 729.05.2013AWD Application in Bac LieuSince 2010, in cooperation with PPsD in Bac Lieu carry out• AWD demo sites: 21 demo sites in 5 districts (21ha)Input Monitoring : irrigation water, seeds, fertilizers, pesticides, laborOutput Monitoring: yield and quality• AWD Training courses: based on “1 must 5 reductions program”,focus on AWD technology21 demo sites in 5 districts (21ha)21 training classes in 5 districts (840 farmers)8 times of training/crop (8 days)since 2010
  9. 9. Page 829.05.2013• Land preparation• Field channels for irrigation and drainage• Land leveling• Crack plowing• Good puddling• Good bund establishment• Seed sowing• Certified seed usage• Line sowing/transplanting• Rice plant careAWD Application in Bac Lieu
  10. 10. Page 929.05.2013Water saving period (days after sowing)0-10 10-30 30-40 40-55 55-65 85-100X X X XIn Bac Lieu, irrigation should be done when water level retreats to 10m deep belowthe surface to prevent adverse impacts of acid sulfate soil0-10 DAS 30- 40 DAS 55 -65 DAS 85-100 DASAWD Application in Bac Lieu• Water irrigation
  11. 11. Page 1029.05.2013• AWD training for farmers• AWD technology based on 1 Must 5 Reductions• Rice production as to the criteria of VietGAP• Field ecosystem observation, diseases realization and prevention• Rice samples collection, yield evaluation and calculationAWD Application in Bac Lieu
  12. 12. Page 1129/05/2013 company presentation 2012Indicators(Average)AWD Control Difference Averagesave($/ha)RemarksSeed (kg/ha) 98,9 146,9 - 48 28,8Water saving(times)6 9 - 3 12,03Fertilizer (kg) 423,9 462,1 - 38,2 15,29Insecticidespraying (times)6,4 9,1 - 2,7 41,7Number ofpanicle/m2519,4 523,6 - 4,2Number of fulfilledgrain/panicle82,2 73,5 + 8,7Yield (tons/ha) 7,01 6,72 + 0,29AWD application results(14 demo sites in Winter – Spring 2012 – 2013)
  13. 13. Page 1229.05.2013Morebenefit?
  14. 14. Page 13Average cost and returnsWinter- Spring 2012- 2013 (dry season)Revenue ($/ha)Total productioncost ($/ha)Net profit ($/ha)ITEMS Control fieldAWD field1,860 1,7609658951,136624Difference ($/ha) 271
  15. 15. Page 1429.05.2013Impacts – Up-scalingFarmer: income increased thanks to decreasing cost production andknowledge improved on rice productionCommunity: more water available for irrigation and less social tensionwhen water becomes scarceEnvironment: GHG emission reduced (particularly Methane)Up-scalingMore farmers to get AWD techniqueAWD to be integrated on the plan of DARD/MARDMedia to be involvedFirst impacts:840 farmers were trained AWD technologyAWD is applied in 753 ha field
  16. 16. Page 15Thank you for your attention!29.05.2013