At present, there is a widespread deficiency of potassium in the soil, particularly in cotton-growing regions. This issue is largely due to thin, infertile soil and a long-standing habit of neglecting the application of potash fertilizer. As a result, cotton plants often exhibit varying degrees of potassium deficiency symptoms, which significantly affect both the quality and yield of the crop.
In recent years, based on the production practices of planting insect-resistant cotton, it has become clear that this type of cotton is more sensitive to potassium. The addition of potassium fertilizer helps prevent physiological red stem blight and premature aging, which in turn enhances the quality of the cotton and increases its yield.
According to experimental data, when the NPK ratio is set at 1:0.5:1 or 1:1:0.5, lint yield can increase by as much as 7.1%. These findings highlight the importance of potassium in improving both the growth and productivity of insect-resistant cotton.
Therefore, it is essential to vigorously promote the use of potash fertilizer in the cultivation of insect-resistant cotton. At the same time, attention should also be given to the proper application of phosphate and micronutrient fertilizers. Adjusting the balance of nitrogen, phosphorus, and potassium to an optimal ratio—such as 1:0.5:0.5 or 1:0.5:1—is crucial for achieving sustainable and high-yield cotton production. By adopting a more balanced and scientific fertilization strategy, farmers can not only improve soil fertility but also ensure long-term agricultural sustainability.
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