Winter wheat is frequently affected by dry hot winds during the heading to grain-filling stages. These dry hot winds can cause the plants to become dehydrated, leading to poor maturation, empty grains, reduced grain weight, and ultimately a yield loss of up to 10% to 20%. To mitigate this issue, applying potassium dihydrogen phosphate (KHâ‚‚POâ‚„) during the heading to milk-mature stage can be highly beneficial. When absorbed through the leaves, phosphorus and potassium help accelerate the synthesis, transport, and accumulation of dry matter, ensuring better grain filling and significantly increasing grain weight. This also promotes faster maturation, reducing the risk of damage from dry hot winds.
For wheat plants that have excessive nitrogen at later growth stages, the application of potassium dihydrogen phosphate can help balance nutrient uptake and speed up the accumulation of dry matter, which is especially useful in preventing lodging and improving overall grain quality. Even if dry hot wind does not occur, this treatment can still lead to increased yields. The recommended concentration for spraying is 0.2%, and it's best to apply it during the heading and flowering stages. A second application at the grain-filling stage, with an interval of 10 to 15 days, can further enhance the effectiveness. This practice not only improves grain quality but also helps the crop withstand environmental stress more effectively.
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