Successfully reported this slideshow.
We use your LinkedIn profile and activity data to personalize ads and to show you more relevant ads. You can change your ad preferences anytime.
Improving agricultural water
productivity through integrated termite
management
Don Peden, Kees Swaans, Denis Mpairwe, Neg...
Key message
Primary RWM goals must include:
• Restoration, maintenance and optimally
distributed biomass reserves (C) amon...
CPWF research
• Confirms termite damage is symptomatic of land
degradation in semi-arid rainfed agriculture.
Diga, Ethiopi...
Selected characteristics of termites
and land degradation
• Can provide valuable ecosystem services.
• Losses increase in ...
Previous CPWF research
• Indicates that damage to pasture can be reduced
by “feeding” rather than killing termites.
• Nigh...
Current NBDC-RIU research
• Preliminary results suggests applying stover mulch
to growing maize also reduces termite damag...
What does this mean for agro-
ecosystem structure and functioning?
• Current agricultural practices cause long-term
declin...
Total litter production (t/ha/year)
0 1.00.5 1.5 2.52.0 3.53.0
Termitefeedingdamage
Low
High
Hypothetical relationship bet...
Above
ground
plant
biomass
Below
ground
plant
biomass
Soil
organic
matter
Threshold
Litter
Role of Macrotermes feeding on ...
Above
ground
biomass
Below
ground
biomass
Photo-
synthesis
Imported
manure
Imported
crop
residues
Carbon inflow
CO2
Food c...
Physical capital
Human capital
Financial capital
Social capital
Natural capital
Implications
• R&D goal needs to restore biomass reserves and
maintain ecosystem services.
• RWM strategies must allocate ...
Thank you
Upcoming SlideShare
Loading in …5
×

Improving agricultural water productivity through integrated termite management

905 views

Published on

Presented by Don Peden, Kees Swaans, Denis Mpairwe, Negash Geleta, Emmanuel Zziwa, Swidiq Mugerwa, Hailemichael Taye and Hirpha Legesse at the Nile Basin Development Challenge (NBDC) Science Workshop, Addis Ababa, Ethiopia, 9–10 July 2013

Published in: Technology
  • Be the first to comment

  • Be the first to like this

Improving agricultural water productivity through integrated termite management

  1. 1. Improving agricultural water productivity through integrated termite management Don Peden, Kees Swaans, Denis Mpairwe, Negash Geleta, Emmanuel Zziwa, Swidiq Mugerwa, Hailemichael Taye, and Hirpha Legesse Nile Basin Development Challenge (NBDC) Science Workshop Addis Ababa, Ethiopia, 9 – 10 July 2013
  2. 2. Key message Primary RWM goals must include: • Restoration, maintenance and optimally distributed biomass reserves (C) among agroecosystem components. • Allocation of rainwater to enable production and maintenance of agroecosystem structure and function. • ITM is one of numerous entry points.
  3. 3. CPWF research • Confirms termite damage is symptomatic of land degradation in semi-arid rainfed agriculture. Diga, Ethiopia Nakasongola, Uganda
  4. 4. Selected characteristics of termites and land degradation • Can provide valuable ecosystem services. • Losses increase in response to over grazing and inappropriate cropping and forestry practices. • Major loss to land, production lives &livelihoods. • Affect semiarid grazing, cropping & agroforestry. • About 20 of Africa’s 1000 species problematic. • Termite control measures costly and ineffective. • Integrated termite management needed.
  5. 5. Previous CPWF research • Indicates that damage to pasture can be reduced by “feeding” rather than killing termites. • Night corralling proved effective in Uganda. Before After
  6. 6. Current NBDC-RIU research • Preliminary results suggests applying stover mulch to growing maize also reduces termite damage Without stover With stover Farmer’s trial
  7. 7. What does this mean for agro- ecosystem structure and functioning? • Current agricultural practices cause long-term decline in plant biomass and soil organic matter. • In “healthy” agro-ecosystems, termites feed on plant litter and populations are controlled by predators and disease. • Termites shift to feed on live forage, crops and trees when preferred litter declines.
  8. 8. Total litter production (t/ha/year) 0 1.00.5 1.5 2.52.0 3.53.0 Termitefeedingdamage Low High Hypothetical relationship between litter production and termite damage to crops and pasture Tipping point below which agricultural production rapidly declines Litter production levels at which agricultural production completely fails
  9. 9. Above ground plant biomass Below ground plant biomass Soil organic matter Threshold Litter Role of Macrotermes feeding on carbon flow YES NO Photo credit: International Research Group on Wood Protection CO2 CH4
  10. 10. Above ground biomass Below ground biomass Photo- synthesis Imported manure Imported crop residues Carbon inflow CO2 Food crops CH4 Animal feed Wood products Carbon lossCarbon storage Soil OM Water Light Soil nutrients Threshold Litter Simplified extended Carbon flow model
  11. 11. Physical capital Human capital Financial capital Social capital Natural capital
  12. 12. Implications • R&D goal needs to restore biomass reserves and maintain ecosystem services. • RWM strategies must allocate water for biomass reserves. • Increased vegetative cover essential. • Integrate ITM with other RWM strategies. • Research needed to refine ITM approach.
  13. 13. Thank you

×