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Impact of Climate Change on Maize and Pigeonpea Yields in Semi-Arid Kenya

In: Environmental Issues and Sustainable Development

Author

Listed:
  • Kizito Kwena
  • George Njomo Karuku
  • Fredrick Ayuke
  • Anthony Esilaba

Abstract

The objective of this study was to assess the impact of climate change on intercrops of maize and improved pigeonpea varieties developed. Future climate data for Katumani were downscaled from the National Meteorological Research Centre (CNRM) and Commonwealth Scientific and Industrial Research Organization (CSIRO) climate models using the Statistical Downscaling Model (SDSM) version 4.2. Both models predicted that Katumani will be warmer by 2°C and wetter by 11% by 2100. Agricultural Production Systems Simulator (APSIM) model version 7.3 was used to assess the impact of both increase in temperature and rainfall on maize and pigeonpea yield in Katumani. Maize crop will increase by 141--150% and 10--23 % in 2050 and 2100, respectively. Intercropping maize with pigeonpea will give mixed maize yield results. Pigeonpea yields will decline by 10-20 and 4-9% by 2100 under CSIRO and CNRM models, respectively. Intercropping short and medium duration pigeonpea varieties with maize will reduce pigeonpea yields by 60-80 and 70-90% under the CSIRO and CNRM model, respectively. There is a need to develop heat and waterlogging-tolerant pigeonpea varieties to help farmers adapt to climate change and to protect the huge pigeonpea export market currently enjoyed by Kenya.

Suggested Citation

  • Kizito Kwena & George Njomo Karuku & Fredrick Ayuke & Anthony Esilaba, 2021. "Impact of Climate Change on Maize and Pigeonpea Yields in Semi-Arid Kenya," Chapters, in: Suriyanarayanan Sarvajayakesavalu & Pisit Chareonsudjai (ed.), Environmental Issues and Sustainable Development, IntechOpen.
    • Handle: RePEc:ito:pchaps:213879
    DOI: 10.5772/intechopen.93321
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    More about this item

    Keywords

    climate change impacts; semi-arid; adaptation; maize yields; pigeonpea varieties;
    All these keywords.

    JEL classification:

    • Q56 - Agricultural and Natural Resource Economics; Environmental and Ecological Economics - - Environmental Economics - - - Environment and Development; Environment and Trade; Sustainability; Environmental Accounts and Accounting; Environmental Equity; Population Growth

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