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How to avoid buying dihydrogen phosphate "fake"? release time: 2019-05-06

   Potassium dihydrogen phosphate is really a rare good fertilizer, it is white crystal, tasteless, odorless, non-toxic, soluble in water, weak acid. The focus is on the three elements of nitrogen, phosphorus and potassium that crops need. It contains two elements! To sum up, potassium dihydrogen phosphate has five main functions: 

   promoting the absorption of nitrogen and phosphorus, which can play the role of rapid phosphorus supplementation, and facilitate the improvement of yield and quality; 

   Promote photosynthesis, in which potassium can enhance photosynthesis of crops and accelerate the manufacture and transformation of nutrients. Improving the ability of crop stress resistance has significant effects on drought resistance, dry and hot air resistance, waterlogging resistance, freezing resistance, damage resistance and pathogen infection. 

   Improving the quality of fruit can play the role of protecting fruit and strengthening fruit in the period of fruit expansion, promoting fruit expansion, improving fruit quality, preventing fruit cracking, increasing coloring and improving taste. Regulating crop growth can promote flower bud differentiation, increase flowering number, strong flower bud, strong flower and fruit, improve fruit setting, and effectively promote root growth and development. How can I use it?

   Potassium dihydrogen phosphate, as a particularly easy-to-use fertilizer, is also applied in many ways. The most common way to apply potassium dihydrogen phosphate to fruit trees is to spray it as leaf fertilizer-so that it can enter the crop directly and promote yield increase. When spraying, pay attention to a few points:
   Master the validity period of spraying, try to choose in the peak period of crop absorption of phosphorus and potassium (such as citrus flower and fruit preservation key period); master the amount and concentration of spraying, as far as possible to achieve uniform spraying of the whole plant, to ensure the absorption of fruit trees.
(At this time, it is estimated that some fruit farmers will ask about the concentration of citrus spraying. Citrus is generally used at bud stage and flowering stage to preserve fruit and expand. The concentration of citrus is about 0.1% ≤ 0.2%. It is carefully used or reduced in the later stage of color conversion.)
  In addition to the leaf surface spraying, the potassium dihydrogen phosphate can also be applied by seed soaking, seed dressing, root irrigation, dipping and transplanting, and base application. Donundefinedt mix it like this!
Potassium dihydrogen phosphate is used in a variety of ways, and the absorption is good, so there are farmers who want to mix it at ordinary times, but! Potassium dihydrogen phosphate is not any medicine can be mixed!
Because potassium dihydrogen phosphate is a weakly acidic substance, it is necessary to avoid mixing with strong alkaline agents or liquids in the process of configuration. The reagent containing copper, manganese, zinc, iron, aluminum, magnesium, calcium and other metal ions can not be mixed with it to avoid the effect of precipitation. Potassium dihydrogen phosphate with low quality may contain unstable components and is not recommended to be mixed with other reagents. In addition, potassium dihydrogen phosphate should not be mixed with too many pesticides, preferably not more than 2 kinds.
   In addition, the solution of potassium dihydrogen phosphate can not be stored for a long time, so it must be ready for use. If it is not known to a certain agent, the system can be configured with a small amount of configuration, and after a small area trial, it is determined whether a large-area application is required. If bubbles, precipitates, discoloration and the like appear in a small amount of preparation, it is indicated that this agent is not suitable for mixing with potassium dihydrogen phosphate.
   Other considerations In addition to the above, there are some precautions to remind you!

   If the concentration of potassium dihydrogen phosphate is too high, it is necessary to avoid the high temperature; it is suggested that spraying should be carried out before 10: 00 in the morning and after 4: 00 in the afternoon; in addition, it should not be applied in rainy days, there is morning dew or not, and spray can be carried out all day on cloudy days. The mixed pesticides are trichlorfon, dimethoate, phoxim and pyrethroid, and the hormones that can be mixed are paclobutrazol, gibberellin, naphthylacetic acid and dwarfism. As a leaf fertilizer only emergency, can not replace the base fertilizer and root topdressing effect; regular manufacturers of high purity potassium dihydrogen phosphate as leaf fertilizer absorption is higher and faster, and low purity not only poor effect, but also may appear fake goods! Be sure to pay attention to when you buy it!

Identification of Dihydro"false" Phosphate
   Distinguish dihydrogen phosphate "false" potassium dihydrogen phosphate easy to use, everyone also likes to use! However, the more people like things, the more fakes often occur, and there are often "magnesium sulfate, potassium chloride, monoammonium phosphate, sodium sulfate, calcium phosphate, industrial salt" on the market. So today Iundefinedm going to teach you how to avoid buying dihydrogen phosphate.
1. Truth and falsehood are tested by fire
    Really potassium dihydrogen phosphate is placed on the iron spoon. After heating for less than 1 minute, the particles at the bottom of the spoon will dissolve and gradually devour the upper particles, eventually becoming a transparent liquid like the one below.
    After stopping the heating, the liquid will solidify into a translucent solid, which is difficult to remove with a scalpel (can be removed by soaking in clear water).
    If it is "false" dihydrogen phosphate, it is heated on the fire, and it is likely to have splashes and odors.
2. Test acidity and alkalinity
    Just now we also said that it is weakly acidic, just try acid and alkali! So how to test the acid is not sour? Don't try your mouth! You only need to spend a few dollars to buy a pH test strip.
    Diluted 200 times and 1000 times of potassium dihydrogen phosphate, compared with the color chart, you know whether it is acidic.
    This method can be more convenient to exclude alkaline products, and it is more convenient to operate. In addition to the test paper, you only need to prepare some water!
3, the most powerful way!
     The first two methods can judge the approximate, but can not be completely guaranteed to be genuine, then is there any better way to use it?
   Have! And it is also very cheap! You only need a pack of "soda soda"!
   Take out two cups, each dissolve potassium dihydrogen phosphate and baking soda, then mix the two cups of liquid! If you have a lot of small bubbles, it is true!

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