Today to introduce to you how wheat skillfully use potassium dihydrogen phosphate to increase production and income, followed by readers and friends asking how to distinguish the quality of potassium dihydrogen phosphate is true or false, how to choose a high-quality potassium dihydrogen phosphate at a good price.
Indeed, potassium dihydrogen phosphate is one of the most used types of foliar fertilizers on crops, and it is also one of the most commonly used and best used foliar fertilizers for farmers, and it is also one of the fertilizer products that are most counterfeited and sold by bad businesses in the market.
In order to help everyone stay away from counterfeit and inferior potassium dihydrogen phosphate, not to be deceived, not to spend money, but also to learn to identify and buy high-quality potassium dihydrogen phosphate, today's agricultural technology small back basket will write you another article to distinguish the authenticity and inferiority of potassium dihydrogen phosphate, detailed everyone will understand at a glance, a use will be.
First, look at the packaging
Potassium dihydrogen phosphate on the outer packaging, there must be obvious chinese characters marked with large characters "potassium dihydrogen phosphate" five words, if the packaging bag surface is written what "composite type", "trace element type", "synergistic type", "nano type", "import type", "chelated type" and other words, pure nonsense fertilizer, because potassium dihydrogen phosphate only contains phosphorus and potassium elements, does not contain other elements, marked on the packaging bag, either fool people want to sell high prices, or pure products have serious quality problems.
In addition, the implementation of the national standard marked on the potassium dihydrogen phosphate should be HG/T2321-2016, and the other implementation standards marked are all unqualified fakes.
Second, look at the content
High quality and high purity potassium dihydrogen phosphate, its effective content marked on the bag should be 98% or 99% (KH2PO4≥98% or ≥99%), where the content standard is less than 98%, it means that its purity is not enough, in other words, the effective nutrient content is low, the impurities contained in it are more, with such fertilizer or the spraying effect will be relatively poor, or we are easy to block the sprayer when spraying after mixing with water. In a word, potassium dihydrogen phosphate with a label content of less than 98%, buy with caution (agricultural technology small back basket is not recommended for everyone to buy and use).
Third, look at the appearance
China's registered potassium dihydrogen phosphate, only solid white transparent crystal or white powder, other appearance states or other colors of potassium dihydrogen phosphate can be uniformly understood as fake, such as granular, liquid or light yellow, yellow-green and so on are fake. In addition, all the bottled or barreled liquid potassium dihydrogen phosphate in the market is not recognized by the national registration (does not meet the national standard HG/T2321-2016), in other words, liquid potassium dihydrogen phosphate is legal in the market, therefore, liquid potassium dihydrogen phosphate is also best not to buy.
Fourth, smell the smell
High-quality potassium dihydrogen phosphate, is not any odor, if you buy back the potassium dihydrogen phosphate in the open bag, found with any odor, such as ammonia smell, pungent odor, milk flavor, etc., then congratulations, you won the lottery to buy fake potassium dihydrogen phosphate.
In addition, after potassium dihydrogen phosphate is placed in the mouth, it will have a slight salty taste, if you want, you can also pinch a few grains in your mouth to try it! Haha~
Fifth, look at the water-soluble state
High-quality potassium dihydrogen phosphate is a fertilizer that can be quickly fully water-soluble, and potassium dihydrogen phosphate is completely transparent and free of any impurities after dissolution. You can take out a small amount of the bought potassium dihydrogen phosphate into the water, evenly stirred if it can be quickly dissolved, and the water is still very transparent without impurities, then the quality of this potassium dihydrogen phosphate is good; if you put a small amount of fertilizer into the water after stirring, there is a long time insoluble, the bottom has sediment or the water becomes turbid, then congratulations you have won the lottery to buy counterfeit potassium dihydrogen phosphate! In addition, even if the potassium dihydrogen phosphate you bought is all dissolved in clean water, however, if you add a little baking soda (soda ash) to the fertilizer liquid, the clear fertilizer liquid becomes turbid, it means that the potassium dihydrogen phosphate you bought is a fake, if the clear fertilizer liquid continues to bubble, it means that potassium dihydrogen phosphate is a good thing with real value! Because the main ingredient of baking soda is ammonium bicarbonate, and mixing ammonium bicarbonate with potassium dihydrogen phosphate will react quickly to produce gas!
In the case of water temperature of 20 degrees celsius, every 100 grams of water can only dissolve 22.6 grams of potassium dihydrogen phosphate, if you add a large amount of potassium dihydrogen phosphate in a small amount of water, no matter how you stir it, it can not be fully dissolved, because the content of potassium dihydrogen phosphate in the water has been completely saturated, so in this case, you can not say that people's potassium dihydrogen phosphate has a problem, you can only say that you put too little water when you test, put too much potassium dihydrogen phosphate!
Sixth, look at the state after heating and cooling
High-quality potassium dihydrogen phosphate potassium dihydrogen phosphate dissolved in high temperature heating (the flame is purple when ignited), and after the fire is cooled, it should be transparent or translucent crystals (such as transparent plastic or glass), if the high temperature heating and cooling is not like this, then congratulations: won the lottery again to buy a fake! Tip: Potassium dihydrogen phosphate can be placed in a stainless steel spoon and then placed on a candle or fire for high-temperature heating experiments. If tomorrow's ammonia odor volatilizes when heating potassium dihydrogen phosphate at high temperatures, then the fertilizer is also a quality problem.
7. Compare market prices
Generally speaking, high-priced things may not be guaranteed to be genuine, but ultra-low-priced things will definitely have quality problems! Potassium dihydrogen phosphate is no exception!
Under normal circumstances, the market 400 grams of small bags of potassium dihydrogen phosphate, generally the price of each bag should be about 8-10 yuan, if who sells you potassium dihydrogen phosphate price is very low, such as a bag of two or three dollars, then the agricultural technology basket suggests you: it is best not to buy, even if you buy it, go home and quickly do a test according to the above method to see the quality! Because, such fertilizers are basically unqualified inferior potassium dihydrogen phosphate, because fertilizer production also has the lowest cost, and the merchants who sell agricultural materials are not philanthropists, will they do loss-making business?
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