Potassium dihydrogen phosphate is also a high-concentration, high-quality chlorine-free potassium fertilizer with extremely low salt value and high nutrient content. It is suitable for use on a variety of crops. It not only promotes fruit expansion, color change, and crop metabolism, but also improves crop rooting, frost resistance, and stress resistance.
The specific functions of potassium dihydrogen phosphate
1. Promote nitrogen and phosphorus absorption
Potassium dihydrogen phosphate can promote the absorption of nitrogen and phosphorus by crops, quickly replenish phosphorus, increase crop yield and thousand-grain weight, and can play a special role in the special physiological period of crops.
2. Promote photosynthesis
Potassium plays a role in enhancing crop photosynthesis and accelerating the production and transformation of nutrients during crop growth.
3. Improve crop stress resistance
Potassium dihydrogen phosphate can improve the stress resistance of crops, such as drought resistance, dry and hot wind resistance, waterlogging resistance, frost resistance, damage resistance and healing, and resistance to pathogenic infection, etc.
4. Improve fruit quality
Spraying during the fruit expansion period can protect and strengthen the fruit, promote fruit expansion, improve fruit quality, increase coloring, and improve taste.
5. Regulate crop growth
Potassium dihydrogen phosphate has the function of a regulator, which can promote the differentiation of crop flower buds, increase the number of flowers, make the flower buds strong, strengthen the flowers and preserve the fruits, improve the fruit setting, and can also effectively promote the growth and development of the root system. Isoparaffin
How to use potassium dihydrogen phosphate
Potassium dihydrogen phosphate can be used in various ways, including spraying, flushing and root irrigation, root dipping and transplanting, seed soaking and dressing, and basal application. The appropriate periods of use for different crops are also different.
Use time, method and recommended concentration of potassium dihydrogen phosphate
Note: ① The above concentration is for potassium dihydrogen phosphate with high purity and chlorine content that does not exceed the standard. ②Due to different regions, different climates, and different crops, the specific usage amount depends on the specific conditions of the crops. ③Research shows that appropriate excessive use of potassium dihydrogen phosphate can improve quality and increase production.
Wheat
● Use 100 to 200 grams of potassium dihydrogen phosphate per acre, and add 500 to 600 grams of water for every 5 kilograms of seeds (water temperature 20 to 25°C) for seed dressing.
● In the early stage of greening, early jointing, early booting, early flowering and early grain filling, apply 200 grams per acre, mix with 75 to 150 times of water and dissolve before spraying.
● During the heading and flowering stage, 300 grams of potassium dihydrogen phosphate per acre can be used for top dressing outside the roots.
● Spraying potassium dihydrogen phosphate before the cold wave of winter wheat can resist cold and frost; spraying potassium dihydrogen phosphate solution in the late growth period can not only supplement phosphorus and potassium nutrients, but also have a certain effect against dry and hot winds.
Rice
● Spray potassium dihydrogen phosphate once each at the tillering stage, jointing stage, and booting stage. The dosage is 100~200 grams per mu and 15 kilograms of water each time. This can extend the life of rice flag leaves and promote the transportation of photosynthetic products to seeds. Further Increase grain weight and achieve high yield.
● Multiple spraying during the grain filling period can enhance the stress and damage resistance of rice and significantly reduce the occurrence of diseases.
Corn
● After the seedlings are established, spray potassium dihydrogen phosphate once at each jointing stage. The dosage per mu is 200 grams mixed with 15 kilograms of water.
● Spray potassium dihydrogen phosphate solution on foliage after flowering, which can protect roots and leaves, and improve the fruit setting rate and fruit filling rate.
● It is characterized by less lodging, less disease, large ears, full tops and full grains, and can generally increase yield by more than 35%.
Peanuts
● Before the flowering period, spray potassium dihydrogen phosphate twice during the flowering and pod-setting stages. The dosage is 100 to 200 grams per mu, mixed with 15 kg of water per mu.
● Potassium dihydrogen phosphate can also be applied in combination with watering during the flowering and pod-bearing stages, and the dosage is about gram per acre.
● It is characterized by less disease, strong seedlings, early fruiting, many and plump fruits, and the growth rate can reach more than 40%.
Soybeans
● Spray potassium dihydrogen phosphate once at the seedling stage, early flowering stage, and full flowering stage. The dosage is 100~200 grams per mu, mixed with 15 kilograms of water.
● Apply potassium dihydrogen phosphate once in combination with watering during the seed-drumming stage, and the dosage is 3 kg/acre.
● The symptoms include more pods, less disease, less lodging, full grains and large growth rate.
● If premature aging caused by malnutrition is found during the grain filling stage, 0.3% potassium dihydrogen phosphate solution can also be used for foliar spraying to remedy the problem.
Garlic
● Before winter, 100g of potassium dihydrogen phosphate mixed with 15kg of water can be sprayed on the leaves per acre.
● After turning green, 200g of potassium dihydrogen phosphate mixed with 15kg of water can be sprayed per acre. After bolting, about 3kg of potassium dihydrogenphosphate aqueous solution can be applied per acre.
● It is characterized by full and strong seedlings, broad and thick leaves, thick garlic sprouts, large garlic heads, few loose petals, high quality, few diseases, and early maturity.
Onions
● During the seedling cultivation period, 50g of potassium dihydrogen phosphate can be mixed with 15kg of water for foliar spraying.
● After transplanting and before harvesting, 200g per acre can be mixed with 15kg of water for foliar spraying. It can also be applied once during the expansion period, with a dosage of about 3kg per acre.
● The onions are more white, solid in the heart, less diseased, high in quality and large in growth rate.
Rape
● Spray potassium dihydrogen phosphate once in the pre-seedling stage and post-seedling stage respectively. Use 50~1010 grams of antioxidants per acre mixed with 15 kilograms of water.
● Spray potassium dihydrogen phosphate once during the sprouting stage, flowering stage and mature stage, 200g per acre mixed with 15kg of water.
● The symptoms include strong seedlings, full seeds, less disease and large growth rate.
Sweet potatoes, potatoes
● Spray potassium dihydrogen phosphate once each during the branching and potato-bearing stage, the stem and leaf growth stage, and the expansion stage.Use 100 grams per mu and add 15 kilograms of water each time.
● It can also be applied by flushing, at least 3 kilograms per mu per time.
Cotton
● Spray once each in the seedling stage, budding stage and flowering stage, 100~200 grams per acre mixed with 15 kg of water. Spray once every ten days from the flowering and boll stage to the top.
● It is rod-shaped, bears early fruit, is thick and large, resists premature aging, has long cotton fiber and good toughness.
● From mid-August to early September, potassium dihydrogen phosphate can be used for top dressing outside the roots to promote cotton bolls to crack and sprout as early as possible.
Cucumbers, tomatoes, beans, eggplants and other vegetables
● Spray potassium dihydrogen phosphate twice from planting to early flowering, at a dosage of 50 to 100 grams per acre mixed with 15 kilograms of water.
● Spray once every 7 days after fruit setting, use 200 grams per mu and mix 15 kilograms of water.
● It has green leaves, fresh color, few diseases, and can meet the standard of pollution-free vegetables.
Cucumber: During the peak fruiting period, 0.3~0.5% potassium dihydrogen phosphate aqueous solution can be sprayed on the leaves.
Tomato: 0.2~0.3% can be used when phosphorus deficiency causes small leaves, late fruiting, leaf curling in the later stages of the plant, potassium deficiency causes irregular fruit shape, uneven maturity, and uneven color, and the plant is susceptible to gray mold. Spray potassium dihydrogen phosphate solution for remediation.
Carrots, white radish
● After planting, spray potassium dihydrogen phosphate twice per acre with 50 to 100 grams and 15 kilograms of water.
● Entering the expansion stage, add 100~200 grams of water per mu and 15 kilograms of water.
● It can also be applied evenly with water when watering, 3 kg per acre is appropriate.
● It is characterized by strong stems and leaves, roughly uniform fruit, less disease and less cracking.
Grapes
● Spray potassium dihydrogen phosphate during the growth period of new shoots, before flowering, flowering period, and fruit expansion period after flowering. The dosage per mu is 100~200 grams mixed with 15 kilograms of water.
● Spraying one month before harvest can increase the sugar content of grape fruits. The grapes will be large, spotless, fresh in color, good in taste and stored for a long time.
Apple, peach, pear, citrus and other fruit trees
● When applying base fertilizer in autumn, apply potassium dihydrogen phosphate evenly and water once after covering. The dosage can be based on the age of the tree, 500~1000 grams per tree.
● Spray potassium dihydrogen phosphate once at the first flowering and young fruit stages respectively. The dosage is 800 grams per mu mixed with 80 kilograms of water.
● Spray two to four times during the expansion period, using 1,200 grams of potassium dihydrogen phosphate per acre mixed with 100 kilograms of water each time; spraying 0.2% potassium dihydrogen phosphate during the fruit expansion stage can promote fruit coloring.
● Spray once 7 days before harvest, use 1200 grams per acre and mix with 100 kilograms of water.
● The fruits are characterized by high sugar content, large fruit diameter, bright color and good taste.
Strawberry
● Spraying 0.3% urea and 0.3% potassium dihydrogen phosphate 3 to 4 times before and after the flowering period can increase the fruit setting rate, improve fruit quality, and increase single fruit weight.
● Before the cold wave comes, spraying potassium dihydrogen phosphate on the leaves can protect against cold and frost.
Watermelon
● Spray potassium dihydrogen phosphate once at the seedling stage, with a dosage of 50 to 100 grams per acre mixed with 15 kilograms of water.
● Spray once every 7 days during the vine-drawing stage, after flowering and setting of the melons, and add 15 kilograms of water per mu. This will not only increase yield but also increase sweetness.
Banana
● When the banana leaves spread until the buds bloom, apply potassium dihydrogen phosphate every 15 to 20 days, 100 to 200 grams per plant each time. After applying it around the banana plant, shovel a small amount of mud from the furrow to cover the fertilizer. , or mix it with 10 to 15 kilograms of water and apply it around the plants.
● In order to improve the nutritional level, 0.3% potassium dihydrogen phosphate can be sprayed on the leaves every 10 to 15 days.
Cherry
In the late fruiting stage of cherries, attention should be paid to the application of phosphorus and potassium fertilizers, and 0.3% potassium dihydrogen phosphate can be sprayed on the leaves 3 to 5 times. It can also be applied by flushing, with a concentration between 0.5 and 0.7%.
Pineapple
● Before the winter cold wave comes, apply 80 to 100 grams of potassium dihydrogen phosphate once to the roots to increase the phosphorus and potassium levels of the plants and enhance their ability to withstand cold and overwinter.
● Spray 0.5% potassium dihydrogen phosphate aqueous solution 2 to 3 times on the leaves, spray once every 7 to 10 days, and spray all the leaves evenly until water droplets begin to flow along the leaves to the leaf axils and drip to the roots, which can obviously Enhance cold resistance.
Flowers
● To soak seeds, use 200 grams of potassium dihydrogen phosphate for every 100 kilograms of seeds, add 50 kilograms of water, soak the seeds for 12 to 16 hours, take them out and dry them.
● For seed dressing, use 200 grams of potassium dihydrogen phosphate for every 100 kilograms of seeds, add 10 kilograms of water, and mix well with the seeds.
● Before transplanting flowers and trees, use 0.4~0.5 kilograms of potassium dihydrogen phosphate per acre, mix it with dry fine soil, add water to make a slurry, and dip the roots into the pot when transplanting.
● For woody flowers such as jasmine, gardenia, rhododendron, etc., 0.3% potassium dihydrogen phosphate solution is often sprayed on the leaves during the growth period to make the branches strong, the leaves luxuriant, and the flowers colorful.
● For herbaceous flowers such as bunch of reds, petunias, dahlias, etc., spraying 0.3% potassium dihydrogen phosphate solution 2 to 3 times during the budding stage can make their flowers larger, more numerous, and brighter in color.
Tobacco
After topping the tobacco, spray potassium dihydrogen phosphate with a concentration of 1000 times, and spray again after 10 to 15 days.
Tea
During the growth period of tea, 50g of potassium dihydrogen phosphate mixed with 15kg of water can be sprayed on the leaves per acre, which can effectively resist drought, cold, yellow leaves and other diseases, and can greatly increase the yield and quality of tea.
Precautions for potassium dihydrogen phosphate
① When using potassium dihydrogen phosphate at high concentrations, be sure to avoid high-temperature times. Generally, high-concentration use is not recommended in high-temperature seasons.
②Potassium dihydrogen phosphate should be sprayed before 10 a.m. and after 4 p.m.
③Potassium dihydrogen phosphate can be mixed with acidic and neutral pesticides to increase the efficacy, but cannot be mixed with alkaline substances.
④Potassium dihydrogen phosphate is a fully water-soluble fertilizer and dissolves when exposed to water. Please store it in a cool and dry place. Please seal the opened bag before use.
⑤ Purchase high-purity potassium dihydrogen phosphate produced by regular manufacturers. It has high absorption and utilization rate when sprayed on foliage, and it is absorbed quickly. Substandard products with low purity or even fake products will not only have no effect on increasing production, but will also cause serious losses. .
To increase the efficacy of the medicine, it cannot be mixed with alkaline substances.
④Potassium dihydrogen phosphate is a fully water-soluble fertilizer and dissolves when exposed to water. Please store it in a cool and dry place. Please seal the opened bag before use.
⑤ Purchase high-purity potassium dihydrogen phosphate produced by regular manufacturers. It has high absorption and utilization rate when sprayed on foliage, and it is absorbed quickly. Substandard products with low purity or even fake products will not only have no effect on increasing production, but will also cause serious losses. .
