polly ericksen program leader, sustainable livestock systems · 2018-07-04 · program leader,...
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Sustainable Livestock Systems: what might the future hold?
Polly Ericksen
Program Leader, Sustainable Livestock Systems
Food for Future Symposium, WUR
22 June 2018
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Animal agriculture and the environment
14.5% anthropogenic greenhouse gas emissions
70% of total freshwater use is for agriculture, of which 31% is for livestock
30% global terrestrial biomes – livestock raising 33% all croplands – livestock feed
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% growth in demand for livestock products to 20302000 - 2030
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Figure 1. Estimates of the % growth in demand for animal source foods in different World regions, comparing 2005 and 2030. Estimates were developed using the IMPACT model, courtesy Dolapo Enahoro, ILRI.
Beef Pork
Poultry Milk
Ericksen et al in prepEricksen et al in prep
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Meeting demand in developing economies
Importing livestock productsImporting livestock industrial
production know-how
Transforming smallholder livestock systems
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Various sources:BMGF, FAO and ILRI
Smallholders still dominatelivestock production in many countries
Region(definition of ‘smallholder’)
% production by smallholder livestock farms
Beef Chickenmeat
Sheep/goat meat
Milk Pork Eggs
East Africa(≤ 6 milking animals)
60-90
Bangladesh(< 3ha land)
65 77 78 65 77
India(< 2ha land)
75 92 92 69 71
Vietnam (small scale)
80
Philippines(backyard)
50 35
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Mixed crop livestock systems in SSA
Type of system Crop diversity
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Livestock are critical assets
• Prevalent across SSA agricultural systems
• Make a large contribution to food security – 41-86% of staple grains
– 90% milk
– 80% meat
• Well integrated systems increase productivity of crops and livestock
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Livestock are kept for multiple reasons
• As assets
• As savings accounts
• To complement crop production
• For cultural status
• Because livestock production is the most sensible livelihood option
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As much as half of the agricultural GHG emissions come from animals
GHG per kg of animal protein produced varies hugely: Big opportunities to mitigate
Herrero et al. 2013
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Production of the greenhouse gas methanefalls as animal productivity rises
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• OECD states: Strong and linear relationship between intake and digestibility & enteric methane production
• SSA: Livestock often at sub-maintenance: no data relevant ranges unexplored
?
Lack of knowledge on ruminant CH4
emissions in SSAwrong GHG
inventories
colddry season
hotdry season
Early rainyseason
rainyseason
postrainy
season
200
100
90
80
150
Main
tenan
ance
level(%
)
Ruminant CH4 emissions during livestock production in OECD countries versus SSA
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Adoption of Improved Forages
• Barriers
– Low availability of land (B) – paddocks?
– Diversified cropping strategies (M, I?)
– Low accessibility of improved planting material (M)
• Potential incentives?
– Field trials to improve farmer awareness
– Investments to stimulate fodder seed
– Financial evaluation of specialization vs diversification
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Rangelands are a vast carbon sink
Rangelands, covering up to 40% of the Earth’s surface, comprise a vast carbon sink
With moderate livestock grazing and good management,Africa’s rangelands alone could sequester8.6 million tonnes of carbon each year
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Rangelands benefit from livestock
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But people are required for good management
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How can management improve rangeland productivity?
• Recognize the need to manage across boundaries and at large scale
• Engage communities to get proper buy-in
• Nest governance arrangements across levels
• Local communities need county or district support
• Cross county agreements need national support
• Cross-border agreements need regional support
• Demonstrate the benefits of investing in rangelands
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Climate change impacts: Mixed Crop Livestock Systems
Thornton and Herrero, NCC 2015
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Fragmented status quo
Reactive governance
Proactivegovernance
Regional integration
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East Africa intervention impacts
Ericksen et al in prep
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West Africa intervention impacts
Ericksen et al in prep
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Tradeoffs among multiple outcomes from sustainable intensification
Hammond et al 2017, Ag Systems
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Take-home messages
• Livestock production varies greatly across
contexts
• Livestock contribute immensely to livelihoods and
nutrition
• Livestock can benefit the environment
• All good management requires carefully designed
incentives
• Tradeoffs are inevitable
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This presentation is licensed for use under the Creative Commons Attribution 4.0 International Licence.
better lives through livestock
ilri.org
ILRI thanks all donors and organizations who globally supported its work through their contributions to the CGIAR system