How to apply potassium fertilizer to cotton

What is potassium fertilizer for?

One is to improve resistance. In the process of plant growth, potassium participates in many physiological activities, which can promote the metabolism of carbohydrates and nitrogen, control and regulate the activity of various mineral nutrients, activate the activities of various enzymes, control the transport of nutrients and water, and maintain the cellular Internal pressure, thus preventing the plant from wilting.

The second is to improve quality. The application of potassium fertilizer can improve the stress resistance of crops and play a very important role in ensuring high and stable crop yields. For example, corn, through the application of potassium fertilizer, can improve the quality of corn stalks and prevent lodging.

The third is to increase production. Due to the high content of potassium in the original soil in some areas, many farmers have not realized the important impact of potassium on yield.

Should potassium fertilizers be used?

Look at the soil. Potassium levels in Chinese soils are slowly decreasing. In addition, potassium fertilizers should be applied in moderation for northern soils.

Second, look at crops. Because potassium plays an important role in improving the protein and sugar content of crops, the application of potassium fertilizer is recommended for general economic crops, especially legume crops, potato crops, cotton and hemp, tobacco and fruit trees.

Third, look at the input of external nutrients. In recent years, straw returning to the field has been advocated because the potassium content in straw is relatively high and easily released, which can supply a large amount of potassium to the soil.

There are many types of potash fertilizers, and the mainstream varieties on the market mainly include potassium nitrate, potassium sulfate, potassium chloride and potassium dihydrogen phosphate.

Potassium sulfate is not easy to agglomerate, has good physical properties, and is more convenient to use, but the production cost is high, and the price is higher than potassium chloride. Therefore, potassium sulfate is generally applied to crops with higher economic value.

And potassium chloride, because it contains chlorine element, should be avoided when applying chlorine-avoiding crops. Such as beet, sugar cane, potato, grape, watermelon, tea tree, tobacco, citrus and other chlorine-avoiding crops, so it is generally not suitable to apply potassium chloride.

Potassium dihydrogen phosphate contains both phosphorus and potassium, and does not contain impurities and residues. All nutrients can be absorbed by crops, which plays an important role in increasing crop production and income, and improving stress resistance.