Root system architecture and rhizosphere interactions for climate-smart agriculture in Malawi and Tanzania

Drought and soil infertility are amongst the most significant constraints on agricultural yield in subSaharan Africa (SSA). In addition to yield losses, poor soil fertility is linked to limited uptake of nutrients by crops (e.g. zinc, selenium, manganese, phosphorus and nitrogen) that are consequently of reduced nutritional value. Conservation Agriculture (CA) promotes soil restoration and crop yield stability fostering a more sustainable climate-smart agriculture. 

This programme of work aims to understand the biological and agro-ecological basis of maize-based CA, focusing on crop and intercrop root system architecture and rhizosphere processes. We will also study, in detail, the transition from conventional agriculture to CA in order to understand the reason for transient yield losses (in the first 3-5 years of CA uptake).  We will apply our collective expertise in plant-rhizosphere interactions to evaluate how root system biology and interactions with beneficial soil arbuscular mycorrhizal fungi could mitigate yield loss in the CA transition period and potentially improve the range of agro-climatic zones over which CA can be successfully implemented. 

Through lab- and greenhouse-based experiments, and field trials (at the Chitedze Research Station in Malawi) using African maize and intercrop cultivars, we will: 

  • Evaluate the impact of CA on root system architecture and mycorrhizal fungi, and 
  • Investigate the potential for improvements in existing germplasm for increasing resource capture through mycorrhizal interactions and evaluate their impact on root exudates and other favourable rhizosphere properties. 

These activities will provide evidence to inform recommendations on the implementation of CA with the aim of increasing the adoption of CA among farmers for whom CA provides genuine long-term benefits in terms of yield and prosperity in the long term. 

For more information about this work, please contact:

Dr Martin Kieffer and Dr Stefan Kepinski

The Centre for Plant Sciences, University of Leeds, United Kingdom

E. m.l.kieffer@leeds.ac.uk                            E: s.kepinski@leeds.ac.uk

T. +44 113 343 3035                                        T: +44 113 343 2865