The use of potassium dihydrogen phosphate in the late growth stage of the grapes can effectively promote the coloration of the grapes. However, there are many kinds of potassium dihydrogen phosphate on the market. Let's talk about potassium dihydrogen phosphate.
When is potassium dihydrogen phosphate most suitable for use?
Before flowering, spraying 0.2%~0.3% potassium dihydrogen phosphate, increasing leaf thickness, enhancing photosynthesis, and increasing fruit setting rate to some extent.
Spray 3-4 times of 0.2% to 0.3% potassium dihydrogen phosphate in the fruit growth period at intervals of 10 to 15 days. Promote the expansion of young fruit, increase yield, increase sugar content, and improve fruit quality.
After picking, 0.2%~0.3% potassium dihydrogen phosphate was sprayed at intervals of 10~15 days to protect leaf function, accumulate nutrients and prevent premature senescence of leaves.
There are many potassium dihydrogen phosphates on the market, so why are the prices very different?
The same is true potassium dihydrogen phosphate (this is a key premise, fakes will not say), the purity will still be different, which also leads to the same true potassium dihydrogen phosphate, but the price will still be different.
High-purity potassium dihydrogen phosphate is selected. The product with high purity has low impurity content, low heavy metal salt content, and high-purity potassium dihydrogen phosphate is used in an excessive amount, which will not cause damage to crops.
Low-purity potassium dihydrogen phosphate, with high impurity content, may cause fertilizer damage, block the nozzle, and heavy metal salts will pollute agricultural products and soil.
Fear of buying fake potassium dihydrogen phosphate? Take a look at this simple method of identification:
1 Where the market is 400g/bag, the product with the words “potassium dihydrogen phosphateâ€, the retail price of the pesticide store is about 2 yuan, which can be judged as counterfeit and potassium dihydrogen phosphate. Most of the content is zero, and some products are over 15%, because the real potassium dihydrogen phosphate raw material 400 grams is much higher than 2 yuan, not to mention the finished product.
2 Potassium dihydrogen phosphate, which smells odor (odor, ammonia, and even milky aroma), is false because the true potassium dihydrogen phosphate is a white, odorless crystal.
3 The Chinese character “potassium dihydrogen phosphate†must be marked on the package, and there should be a detailed factory name, site, telephone number, and implementation standard number. Others such as "composite type", "improved type", "potassium dihydrogen phosphate type", etc. are not genuine, potassium dihydrogen phosphate is potassium dihydrogen phosphate, not so many special models.
4 High purity potassium dihydrogen phosphate, generally free of other elements. For example, 98% potassium dihydrogen phosphate contains only phosphorus and potassium, and does not contain nitrogen or trace elements. Therefore, potassium dihydrogen phosphate containing other components in the content of the components can be regarded as a fake.
5 The liquid bottled liquid potassium dihydrogen phosphate is distributed in the market. It is not in conformity with the requirements of the “appearance of white crystal or powder†on the HG2321-1992 standard, and according to the relevant regulations of the state, there is no liquid potassium dihydrogen phosphate. Does not meet the requirements of the Ministry of Agriculture's fertilizer registration, does not allow production, can be seen as a fake
Is it safe to buy a home?
Teach you one of the simplest methods of identification:
Take one glass, go to half a cup of warm water, put 50 grams of soda ash into the water, then stir until the soda ash is completely dissolved. Take 10 grams of potassium dihydrogen phosphate into the soda ash solution. If there are a lot of bubbles, it is the real thing, if it appears A large number of flocculent precipitates or other reactions indicate that they are counterfeit and shoddy products. (daily agricultural resources)
This article URL: Identification method of pseudo-potassium dihydrogen phosphate? Potassium dihydrogen phosphate effect and optimal use time
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