Applying more potassium fertilizer can prevent premature aging of cotton
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In the process of large-scale cotton production, premature senescence occurs almost every year, resulting in varying degrees of cotton yield reduction. The reasons for premature senescence due to improper fertilizer application are as follows:
1. Transgenic hybrid insect-resistant cotton has a greater demand for potassium than conventional hybrid cotton, and the uptake and conversion of potassium is slower. If the amount of potassium applied is insufficient, it is easy to show symptoms of potassium deficiency;
Second, there are many old cotton fields and few new cotton fields. The organic matter content of the cotton field soil itself is decreasing and the potassium content is not high;
Three. Many farmers are accustomed to applying nitrogen fertilizer and neglect the application of potassium fertilizer. However, too much nitrogen fertilizer will cause the cotton to grow too vigorously and is more likely to cause premature aging;
Four. It is mistakenly believed that laminated fat contains potassium fat, and there is no need to apply potassium fat;
5. There is insufficient understanding of the relationship between potassium fat and cotton fertility.
In the middle and later stages of cotton management, we must emphasize good application and sufficient potash application. First of all, it is necessary to ensure that the amount of potassium applied per mu is not less than 30 kilograms. For example, if potassium chloride with a potassium oxide content of 60% is applied, it should be no less than 30 kilograms per mu. Fitpang has been applied, because fitpang contains Potassium, the amount of potassium applied can be reduced.
Secondly, during the fattening period, it is better to apply half of the bottom fat and half of the chasing fat. If potassium is not applied in the bottom fat, apply 20 kilograms of potassium per acre during the budding stage, and another 10 kilograms during the flowering and bolling stages.
Afterwards, potassium fertilizer should be mixed with nitrogen and phosphorus fertilizer. During the bud stage, it should be combined with cultivating soil and digging trenches. During the flowering and boll stage, holes should be drilled and applied deeply. Broadcast application should be avoided to prevent loss after rain.
Increased application of potassium fertilizer can prevent the occurrence of premature cotton senescence
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