Everyone knows that spraying potassium dihydrogen phosphate on wheat, fruit trees and other crops has a significant effect on increasing yields. Indeed, it is a high-quality, high-concentration chlorine-free potassium fertilizer with extremely low salt value and high nutrient content. It is suitable for a variety of crops. It is used, so it is called “universal fertilizer”!
1. Potassium dihydrogen phosphate
The total content of potassium dihydrogen phosphate is ≥86%; of which phosphorus pentoxide is ≥52 and potassium oxide is ≥34.
The current minimum standard for potassium dihydrogen phosphate for agricultural use is 92% purity, which is considered a qualified product. The industrial standard first-class product has a purity of 98%. In fact, many companies now produce products with a purity of over 99.3.
Because potassium dihydrogen phosphate is currently widely used in drip irrigation agriculture, the requirements for water-insoluble matter are relatively high and the chlorine content is also low. Therefore, even if they are all qualified potassium dihydrogen phosphate, the price will be different due to the difference in purity. It can not only promote fruit expansion, color change, and crop metabolism, but also improve crop rooting, frost resistance, and stress resistance.
2. What are the 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 during crop growth and accelerating the production and transformation of nutrients.
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.
3. 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.
1. Concentration
Liu Chaogui of Southwest University and others conducted root irrigation experiments on tomato seedlings. When the concentration is 25-20 times, potassium dihydrogen phosphate root irrigation has an inhibitory effect on tomato seedlings. If the concentration is lower than 20 times, seedlings will burn. It has been proved that if the concentration of potassium dihydrogen phosphate is too high, it will cause fertilizer damage.
The irrigation rate of potassium dihydrogen phosphate can be 1000 times or 2-3 kg per acre (depending on the base fertilizer).
2. The period of use of potassium dihydrogen phosphate is selected when crops have a large demand for phosphorus and potassium absorption. This thing cannot be used often. If you use too much, just choose the appropriate period and the appropriate amount.
3. Specific usage times and recommended concentrations for foliar spraying of various crops
▼
▲
Application method
Dilution factor
Application times
Application cycle
Fruit trees
500-800
100 grams mixed with 50 kilograms of water
Spray every 10-15 days before flowering, after flowering, young fruit stage, and fruit expansion stage
Vegetables
300-500
100g mixed with 30kg of water
Spray every 10 days during the seedling stage, before flowering, after flowering, and during the fruiting period
Cotton and other cash crops
300-500
100g mixed with 30kg of water
Spray every 7 days during the seedling, budding, flowering and boll-bearing stages
Peanuts and other leguminous crops
300-500
100g mixed with 30kg of water
Can be used in the seedling stage, flowering stage, pod setting stage and grain expansion stage
Wheat, rice, corn and other grass crops
300-500
100g mixed with 30kg of water
Can be used in the seedling stage, jointing stage, booting stage, flowering stage and grain filling stage
Flowers, tea, tobacco
300-500
100g mixed with 30kg of water
Can be used during the seedling stage, flowering stage and the entire growth period
Chong Shi
1-3kg/acre
The dosage is 1-3kg per mu.
irrigate roots
500-1000
50-150g mixed with 50kg of water
Water evenly at the roots of the crops.
Soak seeds
500-1000
Soak the seeds in 12uv adhesion promoter for an hour, take them out to dry and then sow them. The solution can be applied.
Mixed seeds
500-1000
Sprinkle on the seeds, mix well, let dry before use.
izing: border-box !important; word-wrap: break-word !important; clear: both; min-height: 1em;”>mix kind
500-1000
Sprinkle on the seeds, mix well, let dry before use.
