Technical points for applying potassium fertilizer in cotton fields

The application of potassium fertilizer in cotton fields has the following effects: First, increase the physiological activity of cotton and increase the utilization rate of nitrogen fertilizer. The second is to promote the growth of cotton roots, stems, leaves and reproductive organs, extend the functional period of the leaves, and prevent premature aging. The third is to enhance the resistance of plants to disease and stress, and significantly enhance the ability to resist blight in the old cotton area. The fourth is to increase the ringing rate and increase the single bell weight and seed index. According to the experiment, the number of bolls per plant of cotton plants treated with potassium fertilizer increased by 2~3, the weight of single boll increased by 0.6~1.4g, and the seed index increased by 0.25~1.3g. Fifth, increase production by more than 10%.

The amount of potassium fertilizer used in conventional cotton requires 10-15 kg of potassium oxide per mu, and the insect-resistant hybrid cotton needs to apply about 30 kg of potassium oxide per mu. In the early stage, compound fertilizer was applied, and 15 kg of potassium oxide was applied per mu in the bud stage. All localities can be mastered according to soil quality, fertility and climate.

Fertilization time for many years, more practice has proved that potassium fertilizer is applied twice, the first application of base fertilizer, the second application of bud fertilizer, and the application of flowering and bolling period is also effective. The effect of mixing potassium fertilizer with organic fertilizer is better.

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