At present, there is a widespread deficiency of potassium in the soil, particularly in cotton-growing regions where the soil is thin and lacks fertility. This problem is further exacerbated by the traditional fertilization practices that often neglect the application of potash fertilizer. As a result, cotton plants exhibit varying degrees of potassium deficiency symptoms, which significantly impact the quality of the cotton and reduce overall yield.
In recent years, with the cultivation of insect-resistant cotton, it has become evident that this variety is more sensitive to potassium levels. The addition of potassium fertilizer plays a crucial role in preventing physiological red stem blight and premature aging, both of which can severely affect the growth and development of the plant. By improving the nutrient balance, especially potassium, cotton quality is enhanced, and yields are increased.
According to experimental data, when the NPK ratio is maintained at 1:0.5:1 or 1:0.5:0.5, there is a noticeable improvement in lint yield, with an increase of up to 7.1 percent. These findings highlight the importance of potassium in supporting the growth of insect-resistant cotton.
Therefore, it is essential to promote the widespread use of potash fertilizer in cotton farming. In addition to potassium, attention should also be given to the application of phosphate and micronutrient fertilizers. Adjusting the nitrogen, phosphorus, and potassium ratio to 1:0.5:0.5 or similar balanced proportions will help ensure optimal plant health and productivity.
By adopting these improved fertilization strategies, farmers can not only enhance crop performance but also contribute to sustainable agricultural practices in the long run.
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