Swift action can help protect rice farmers in Sahel from climate change

According to De Vries it is a misconception, including among farmers, that growing rice requires a great deal of water. It is true, however, that rice plants need water for their growth and development. Due to irregular rainfall, rice farmers in the Sahel depend on irrigation. De Vries’ research shows that by adapting their irrigation approach, the farmers can save up to 40 per cent of their water consumption while maintaining a good yield. The saved water can then be used to grow rice or other crops on fields where no water is available. This could help make rice production more sustainable while also improving the local food supply.

The research by De Vries also demonstrates that the water-saving measures are probably most effective when applied over a longer time period as incidental interventions could still lead to losses in yield.

Although rice needs a lot less water than farmers think, rising temperatures due to climate change could increase crop failure as rice plant flowers become sterile at above 36 C. This means that they cannot be pollinated and do not produce rice seeds, resulting in drastic falls in yield.

With climate change expected to cause temperatures in the Sahel to increase by two to five degrees, thermometers will be passing the 36oC mark. De Vries reinforces the necessity to quickly develop rice varieties that are more heat resistant, produce good pollen and ova, or are able to avoid heat.

Provided by Wageningen University