Crop residue use in crop-livestock farms: Challenges and options of mulching in sub-Saharan Africa and South Asia

Crop residue use in crop-livestock farms challenges & options of mulching in Sub-Saharan Africa and South Asia 5th World Congress on Conservation Agriculture Brisbane, Australia, 26-29 September 2011 Diego Valbuena Olaf Erenstein Sabine Homann Tahirou Abdoulaye Alan Duncan Bruno Gérard Nils Teufel

mixed systems & SLP www.vslp.org Mixed systems = 2/3 population + food + value chains (Herrero et al. 2010) Biomass trade-offs : immediate demands & soil sustainability SLP : Bring livestock research on the agenda + links CGIAR Current project: crop residues use in mixed systems

objectives D escribe crop residue use in diverse mixed systems I dentify main challenges of mulching L ook for options related to mulching

crop residue use CA ideal situation http://www.iconpot.com http://www.openclipart.org

crop residue use mixed crop-livestock farms $$ http://www.openclipart.org http://www.how-to-draw-funny-cartoons.com http://coloring-drawing.com www.clipartof.com http://www.iconpot.com

working ideas C R : much more than mulch O ffer (intensification) & demand (pressure) matter O ptions need to include local specificities

site & village selection site : agri. intensification & market village : market & road access

selected sites after Valbuena et al. submitted Pot. pressure on biomass HIGH MEDIUM LOW Country India Bangla. Kenya Ethiopia India Ethiopia Zimb. Mozam. Niger Nigeria Malawi Niger Site ID H-I1 H-B H-K M-E2 M-I2 M-E1 L-Z L-MZ L-N1 L-NG L-MW L-N2 Location Karnal Dinajpur Kakamega Nekemte Rajasthan Kobo Nykayi Changara Fakara Kano Mzimba Maradi Symbol Market access +++ + + ++ + ++ + ++ + + +++ + ++ Intensification +++ ++ ++ + + + + + + ++ ++ + Agro-ecology semi-arid (irrigated) humid (irrigated) highlands highlands semi-arid semi-arid semi-arid semi-arid semi-arid semi-arid semi-arid semi-arid Rainfall 750 2000 1650 1050 650 700 600 650 500 800 700 600 Main crops wheat-rice rice maize, beans maize, teff maize sorghum, teff maize maize, millet, sorghum millet, cowpea sorgh. maize.gnt cpea maize millet, sorghum, cowpea Livestock buffalo cattle cattle goat cattle-dairy cattle cattle/buf goat cattle cattle cattle goats cattle shoats cattle shoats cattle goats cattle shoats

potential biomass pressure after Valbuena et al. submitted M-E1 H-B L-N1 H-I1 L-NG L-N2 L-Z L-MW M-E2 M-I2 L-MZ H-K Grouping sites: pop. & livestock densities

land & animals M-E1 H-B L-N1 H-I1 L-NG L-N2 L-Z L-MW M-E2 M-I2 L-MZ H-K land & livestock; livelihood for > ½ farms

income & production M-E1 H-B L-N1 H-I1 L-NG L-N2 L-Z L-MW M-E2 M-I2 L-MZ H-K Range of agriculture & self-consumption Extremes in S. Asia

CR more than mulch: cereals after Valbuena et al. submitted sites 0% 20% 40% 60% 80% 100% H-I1 H-B H-K M-E2 M-I2 M-E1 L-Z L-MZ L-N1 L-NG L-MW L-N2 other traded left/mulch feed ↓ feed ↑ mulch ↑ feed, ↓ mulch NG: feed-fuel MW: feed-mulch

CR more than mulch: legume H-K L-N1 % sold % fed % others L-NG L-N2 Legume residue high value or good for cooking (H-K). No mulching. In Southern Africa not mentioned.

trends last 10yrs Overall increase of CR use as fuel & stall feed Increase left/mulch key sites: irrigation & fertilizers Increase of collection/privatisation of CR in ET % villages H-I1 H-B H-K M-E2 M-I2 M-E1 L-Z L-MZ L-N1 L-NG L-MW L-N2 increase fuel - 71 100 100 - 63 - - 100 88 - 57 stall feed 63 100 88 100 38 88 60 88 86 100 - 71 left/mulch 63 88 38 0 0 0 - 40 57 - 75 - decrease left/mulch 0 13 63 88 25 100 - 20 43 - 13 -

CR as feed after Valbuena et al. submitted sites H-I1 H-B H-K M-E2 M-I2 M-E1 L-Z L-MZ L-N1 L-NG L-MW L-N2 0% 20% 40% 60% 80% 100% ↑ feed: M & H- sites ↑ feed sources

feed shortages 0 2 4 6 8 10 crop residues green fodder grazing sites H-I1 H-B H-K M-E2 M-I2 M-E1 L-Z L-MZ L-N1 L-NG L-MW L-N2 M-sites & West Africa: ↑ pressure on feed

intensification matters after Valbuena et al. submitted M-ET1 H-BD L-NE1 H-IN1 L-NG L-NE2 L-ZW L-MW M-ET2 M-IN2 L-MZ H-KN ↑ pop: ↑ intensity (area) H ↑ pop: ↓ communal land ↑ pop ↓ int./prod (area) & ↓ com. land: ↑ pressure on CR

other CA-related practices M-E1 H-B L-N1 H-I1 L-NG L-N2 L-Z L-MW M-E2 M-I2 L-MZ H-K > ½ area is tilled by animal; but also hand or tractor (not shown) Scarce legumes; market distortion & farming systems

results show that: CR are short-term resources: feed & Co. CR to mulch with lower pressure (very ↑ production; or ↑ production + ↓ demand), but practices need to change. With higher pressure: increase of production is needed. Each region has its own potential, challenges & options for more sustainable agriculture = no silver-bullet exists

work in progress household diversity linking better socio-economic, biophysical & institutional stakeholder involvement: R4D & demand-led R&D proposals

Crop residue use in crop-livestock farms: Challenges and options of mulching in sub-Saharan Africa and South Asia

by ILRI on Sep 30, 2011

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Crop residue use in crop-livestock farms: Challenges and options of mulching in sub-Saharan Africa and South Asia — Presentation Transcript