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Preventive and remedy measures for potassium deficiency: First, the application of organic fertilizers, including organic manure, manure, green manure, compost, cake fertilizer and straw returning. Organic fertilizers not only contain various nutrients, but also can change soil physical and chemical properties. Increase soil fertility and water retention capacity, which is the main way to solve potassium deficiency in cotton fields. Cotton straw has a high potassium content, and returning to the field for three consecutive years can increase the potassium content of cotton fields to a high potassium level. Second, while increasing the input of potash fertilizer, improve the fertilization method, and advocate: the southern part of the base fertilizer, the bud fertilizer, the flower bell fertilizer three times, and the north combines the arable land once, and it should be mixed with the organic fertilizer. Thirdly, in the cotton field where the symptoms of potassium deficiency are found in the late belling stage, it is necessary to promptly spray the potassium on the foliar surface for remediation. Use 150-200 g of potassium dihydrogen phosphate per acre, 75 kg of water, or spray with 1% to 1.5% potassium sulfate solution. Every 7 days, from mid-August to mid-September, it can obviously play the role of maintaining flowers, keeping bells and increasing bells.
Source: Agricultural Science and Technology News
Potassium deficiency measures in cotton fields
The field performance of potassium deficiency in cotton fields is: the plants are short, the main stems are thin, and the internodes are short. The lower leaves first appeared symptoms. The tips and edges of the leaves were yellow at the beginning of the diseased leaves, and yellow-white plaques appeared on the posterior leaves. Then yellow spots appeared in the veins and gradually expanded into brown spots. Finally, the whole leaves were reddish brown, and the leaves were easy to dehydrate. Shrink, leaf margin drooping, leaves die or fall off early, bells are difficult to vomit. Severe potassium deficiency plants die prematurely, showing red stem stems.
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