Photo: Jason Sparrow
Wheat is grown on more land area than any other food crop (220,7 million hectares in 2021) and dominates world trade among crops.
In 2021, global wheat production reached 771 million tons, making it the third most produced cereal after maize and rice. The increasing demand for wheat is driven by its unique gluten properties, which are essential for processed foods. Nutritionally, wheat is a significant source of carbohydrates, vegetable protein, essential nutrients and dietary fibre while being low in fat.
Climate change has created global challenges for wheat production, affecting yields in South Africa’s irrigated and dryland areas. To address this, companies such as Kynoch have developed strategic management practices to maintain and increase yields under stressful environmental conditions.
Stress management practices for weather-sensitive wheat
Wheat is generally hardy, with a fine root system that efficiently utilises soil. It thrives in cool weather and is adapted to winter conditions during its initial vegetative phase.
However, critical life cycle stages, particularly flowering and grain filling, are sensitive to extreme weather. The optimal temperature for wheat flowers during anthesis (flowering) and pollination is 23°C, with a tolerance of ±1,75°C, while the optimal temperature during grain filling is 26°C, with a tolerance of ±1,53°C.
Terminal heat stress, occurring when temperatures exceed 31°C during grain filling, can reduce yields by up to 18,1%. In the Northern Cape, temperatures often surpass 40°C.
Basic agronomical practices such as planting date, cultivar selection, seed depth, seeding rate, soil tillage, seedbed preparation, pest management, soil water scheduling (irrigation) and salinity control are essential for mitigating environmental challenges.
Fertility and nutrition come into play after these factors are managed. Technology-driven granular planting and topdressing products, including KynoPlus, Miracle, Casuma and the Ultra ranges, provide stabilised nitrogen, improved potassium with zinc and silicon, and stress-relieving elements to enhance plant potential. Healthy plants handle stress better, so it is crucial to support the crop from the start.
Heat stress generates reactive oxygen species (free radicals) that damage plant cells, causing leaky cells and impairing photosynthesis. Kynoch offers high-quality products with scientific stress management formulations, such as Wheat OEMFF, KynoFulvate Yellow and Kynokelp, which enhance photosynthesis and stress tolerance.
Wheat OEMFF is a foliar product containing a balanced nutrient combination and a specialised enhancer to stimulate photosynthesis. It can be applied early in the vegetative phase and later at the vital flag leaf stage, which is crucial for wheat health.
KynoFulvate Yellow can be combined with Wheat OEMFF or liquid fertilisers to enhance nutrient uptake and mobilise nutrients within the plant and soil, increasing drought tolerance.
Kynokelp is a natural product rich in bio-stimulating compounds that promote root development and activate metabolic processes to alleviate stress. These products are part of the Kyno Stress Kit concept designed to manage crop stress and improve yields and quality.
Wheat is still the best crop since sliced bread. It remains a favourable cash crop with the potential to bring prosperity and signal future agricultural success. In an ever-changing climate, mitigating and managing stress on the agronomical and plant physiological levels is crucial.
For more information, email [email protected] or visit www.kynoch.co.za/products.
