Potassium dihydrogen phosphate is a widely used medicine in crop cultivation. It can be used in any crop, which can effectively improve the quality of agricultural products. But when you use it, you should pay attention to the correct use method, otherwise it will cause serious drug damage. The scientific application methods and precautions of potassium dihydrogen phosphate are shared below for your reference.

1. How long is the best time to use potassium dihydrogen phosphate?

The safe period of potassium dihydrogen phosphate application is usually 7-15 days. Soaking seeds and application need not be said much. Spraying time can be used once every 7-10 days, and spraying time can be sprayed once every 10-15 days. A crop should not spray too many times in a season, spraying about three times in the critical growth period.

　　How to use potassium dihydrogen phosphate most scientifically?

1. Soaking seeds: Soaking seeds with potassium dihydrogen phosphate can make the seed germination rate of crops, early germination, early seedling emergence, full seedling, strong seedling stage, green leaves, more tillers, developed roots and so on. In terms of dosage, seed dressing usually uses 2 grams of potassium dihydrogen phosphate to make a solution, and then sprays it on the seeds to mix and dry. Soaking seeds can generally be made into a solution of 50 kg of water plus 100 grams of potassium dihydrogen phosphate (or according to 1 kg of Seed + 20 grams of potassium dihydrogen phosphate), soaking seeds 2-3 inches and soaking 12-16. After an hour, it can be salvaged and dried.

2. Use of dipping roots: potassium dihydrogen phosphate dipping roots, in the transplantation of flowers and seedlings used more. When the planting area is large, it can be dipped into roots by adding appropriate amount of water and dry fine soil according to the dosage of 0.5 kg potassium dihydrogen phosphate per mu, and roots can be dipped in 0.1% concentration for flower seedlings compared with family planting.

3. Use of base fertilizer: The use of base fertilizer is usually mixed with other fertilizers before planting, but because the real price of potassium dihydrogen phosphate is relatively high, so we do not recommend the use of base fertilizer (which costs a lot of money), so we will not do more introduction.

4. Use of foliar spraying: Potassium dihydrogen phosphate as foliar fertilizer is the most common, the best effect, and generally mixed with various pesticides and fertilizers. After using potassium dihydrogen phosphate, crops not only have the functions of strengthening seedlings, trees, roots, flowers and fruits, but also can enhance the stress resistance of crops (such as drought resistance, cold resistance, disease resistance, dry and hot wind resistance). At the same time, they can rapidly supplement phosphorus and potassium nutrition, enhance photosynthesis and accelerate the production of nutrients, which can promote flower bud differentiation and fruit. Development and so on all have very remarkable effect.

(1) Gramineae crops: wheat, maize, rice and other field crops, sprayed best at several filling stages before turning green, jointing, flowering, booting and grain filling; cotton was best used in several key stages of budding, flowering and bolling; flower plants could spray best before and after flowering stage; the concentration of spraying was the same as that before flowering stage. Potassium hydrogen phosphate 100 grams mixed with water 30-50 kg use;

(2) Vegetable crops: Vegetable crops sprayed potassium dihydrogen phosphate more often, usually about 7 days sprayed once, each time according to 100 grams of potassium dihydrogen phosphate 30 kg of water can be used.

(3) Fruit tree crops: apples, peaches and other fruit tree crops, in the pre-blooming, post-blooming, young fruit, fruit expansion period of several key stages of the use of the best effect, generally in accordance with potassium dihydrogen phosphate 100 grams of water 50-60 kg of water can be used.

Examples of several crop use methods are as follows: (1) peanut is used in pre-flowering, needle-setting and POD-SETTING stages with water of 50 kg per mu at 100 grams; (2) maize is used at seedling-setting and jointing stages with water of 30-50 kg per mu at 100 grams per mu, and 0.2% concentration is sprayed at flowering stage; (3) wheat is used at pre-greening, jointing, booting, flowering and filling stages with 100 kg per mu at jointing stage. 50 kg of water per mu at heading and flowering stage, 20 g of water per mu, 15 kg of water per mu; 4) 100 g of water per mu at tillering stage, jointing stage, booting stage and filling stage, 50 kg of water per mu, and 1-2 times more at filling stage; 5) 30 g of water per mu for tea during growing period, 15-30 kg of water per mu for rapeseed before and after seedling stage; At bolting stage, flowering stage and ripening stage, spraying 15 kg of water per mu is 20-30 grams; _radish spraying 50-100 grams of water per mu after planting and expanding stage; _garlic spraying 50 kg of water per mu before winter, spraying 0.2% concentration of fertilizer solution again after returning to green; _onion spraying 20 grams of water 15 kg at seedling stage, and shifting.  Before planting onion, 80 grams per mu is sprayed with 50 kg of water; _Potato tuber crops are sprayed with 50 kg of water per mu at the stage of branching and caking and tuber swelling; strawberry can be sprayed with 0.2-0.3 concentration of fertilizer before and after flowering; watermelon can be sprayed with 50-80 grams of water per mu at seedling stage, vine pumping stage, fruit setting stage and swelling stage, etc. 。

5. Irrigation Root and Irrigation Application

Potassium dihydrogen phosphate is usually diluted 1000 times the irrigation root concentration (the ratio of potassium dihydrogen phosphate to water is 1:1000). The amount of water and fertilizer per mu is about 100 kg, and the amount of 10-20 grams per plant is enough.

3. What are the precautions for the use of potassium dihydrogen phosphate?

1. Potassium dihydrogen phosphate can be mixed with most acidic and neutral fertilizers and pesticides, but it can not be used with alkaline fertilizers and pesticides.

2. Potassium dihydrogen phosphate is most suitable for use in the peak period of crop phosphorus and potassium demand, such as the underground tuber swelling period of potato tuber crops, the flowering period of cotton, the period from moss to flowering period of rape, the fruit swelling period of Solanaceous crops, and the booting period of cereal crops, etc.

3. Spraying time of potassium dihydrogen phosphate should avoid high temperature at noon, preferably before 10 a.m. or after 4 p.m.

4. Potassium dihydrogen phosphate can not replace base fertilizer and potassium dihydrogen phosphate