Microdose technology to improve crop productivity in west Africa
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Microdose technology to improve crop productivity in west Africa

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Microdose technology to improve crop productivity in west Africa Presentation Transcript

  • 1. The microdose technology to improve crop productivity in low fertility and eroded soils in sub-saharan west Africa: more evidence from north-west Benin PBI Akponikpè, FT Moutouama, R. Lokossou, MN Baco, AJ Djènontin, D Fatondji, A Kimaro, D. Peak, N Sokpon FARA, Africa Agriculture Science Week, Accra, 16th Jully 2013
  • 2. The microdose technique Concept • Microdosing - Microfertilising – Strategic application of small amount of fertiliser to hills at sowing or 10 days after emergence • Fertilizer may be mineral (urea, NKP, DAP, ...) or organic (manure; FYM) • Crop may be cereals (millet, sorghum, maize) or legumes (groundnut, cowpea, etc) – Placement strategy • Three people from the begining (1st-opening hills, 2nd- seeding 3rd-microfertilizer and closing the hills) • Now, one person
  • 3. The microdose technique Rationales • Poor soils (mainly P deficient) • Scarce organic input (manure, or residues) • Low mineral fertiliser availability • Poor farmers who cannot afford buying high amount of fertiliser (which limits adoption of recommended doses • Recommended doses often results in low yield in dry years
  • 4. The microdose technique Reviewed performance • Burkina Faso – Sorghum • Grain yield > 1.5 t/ha • 110 % > control (no input farmer option) • 20 % > Recommended dose (broadcast 75 kg NPK + 50 Kg urea /ha) Microdose Control Nagreongo, 2005, BFControl MicrodoseRecom. dose
  • 5. The microdose technique Reviewed performance • Burkina Faso – Millet • Grain yield > 1.0 t/ha • 100 % > control (no input farmer option) • 30 % > Recommended dose (broadcast 75 kg NPK + 50 Kg urea /ha) Nagreongo, Sept 2007, BF Microdose Control Control MicrodoseRecom. dose
  • 6. The microdose technique Scaling up • The IDRC-CIDA microdose Project – 2011-2014: Integrated Nutrient and Water management for sustainable food production in the Sahel (http://www.inuwam.org) • 4 countries (Benin, Burkina, Mali and Niger) and Canada (Uof Saskatchewan) – Further testing and improvement under SWC tech. – Scaling up (warrantage – Soil mining analysis – Nutrient leaching
  • 7. On farm experiment-Benin Context • Farmer conditions – Boukombé, most vulnerable district – Low income • Harsh environment – Hilly topography – Poor soils, prone to water erosion
  • 8. On farm experiment-Benin Experimental setup: 2012 • Two factors in split plot design (3 replications) – Factor 1: Soil and water conservation techniques (3 variants): • Hillside – Rectangular honey comb – Circular honey comb – Stone row • Plain – Perpendicular ploughing – Simple tied ridging – Staggered tied ridging
  • 9. On farm experiment-Benin Experimental setup • Experiment design: split plot design with two factors – Factor2: mineral fertilizer application (4 levels): – Recommended dose/ 5.52g NPK /hill at 25DAS (230kg NPK /ha) and 1.2g urea /hill 45DAS (50kg urea /ha) – Microdose option 1: 4g/hill of NPK at sowing ((166 kg NPK /kg) and we still have to put 1.2g/hill of urea 45DAS(50kg urea /ha) – Microdose option 2: 2g/hill of NPK at sowing (83.33 kg NPK /ha) and we still have to put 1.2g urea /hill at 45DAS (50kg urea /ha) – Control: no fertiliser (0g/hill of NPK and 0g/hill of urea
  • 10. On farm experiment-Benin Findings: Leaf Area Index • Plain ns= not significant; **, ***= probabilitysignificantat 0.001 and 0.01 respectivily
  • 11. On farm experiment-Benin Findings: Leaf Area Index • Hillside ns= not significant; **, ***= probabilitysignificantat 0.001 and 0.01 respectivily
  • 12. On farm experiment-Benin Findings: Yield • Plain Grain yield (Kg/ha) 60 DAS Microdose 1 (MD1)Control (C) Microdose 2 (MD2) Recommendation (RD)
  • 13. On farm experiment-Benin Findings: Yield • Hillside Grain yield (Kg/ha) 60 DAS Microdose 1 (MD1)Control (C) Microdose 2 (MD2) Recommendation (RD)
  • 14. Farmer field demonstrations-Benin Strategy Districts Village Nomber of tests (farmer) Nomber of women Boukombe Koukoua 20 20 Koumagou B 20 0 Koudogou 20 0 Ouake Allayomde 18 2 Kalla 19 0 Tchallade 9 2 Total 6 106 22
  • 15. Farmer field demonstrations-Benin Strategy • Maize under various Rain Water Harvesting – Recommendation: • 150 Kg of NPK/ ha and 50 Kg of urea/ha. – Microdose: • 83 Kg of NPK/ ha and 41 Kg of urea/ha. Microdose Recommendation Date Fertiliser Quantity/hill Practical qty/hill Quantity/hill Practical qty/hill 1-15 DAS NPK 2,0 g 3 fingers pinch 15 DAS 3,6 g 2 x 3finger pinch 45 DAS Urea 1,0 g 3 fingers pinch 1,2 g 4fingers or 2 x 3 fingers
  • 16. Farmer field demonstrations-Benin Findings • Yield, 2011
  • 17. Farmer field demonstrations-Benin Findings • Yield, 2012
  • 18. Farmer field demonstrations-Benin Findings • Benefit/Cost analysis, 2012 Techniques de fertilisation Techniques de CES Microdose Recommandée MB (F CFA) B/C MB (F CFA) B/C LP 266 485 2,6 371 005 3,1 BC 245 925 2,3 286 845 2,3 CP 263 325 2,5 314 805 2,5 LCN 372 205 3,6 383 605 3,2 BSP 201 885 2,0 231 285 1,9 Moyenne 269 965 2,6 317 509 2,6 Contour line ploughing Av erage Microdose Recommendation RWH Ferlization Flat ploughing Tied ridges Stone rows Perpendicular ploughing GM GM
  • 19. Concluding remarks • On-farm experiment and demonstrations – the microdose treatments showed a better nutrient use efficiency than the recommended dose and the control. • Microdosing advantages and reasons for upscalling – low fertilizer application rate, – high probability of yield response – a favorable fertilizer/grain price ratio.
  • 20. Concluding remarks • On-going studies within the IDRC-CIDA microdose project – Optimal and refined doses (modeling) – Long term effect on soils (experiment and modeling) – Nutrient leaching (as combined with Rain water harvesting techniques)