Advantages and disadvantages of using fertilizers and pesticides:

①Profit: Fertilizers and pesticides play an important role in improving the yield of crops.

② Disadvantages:

a. Unreasonable application of chemical fertilizers will bring many environmental problems. On the one hand, chemical fertilizers contain some heavy metal elements, toxic organic compounds and radioactive substances, which will cause potential soil pollution after application; The accumulation, loss or change of components causes soil acidification, increased nitrogen and phosphorus content in waters, nitrogen and sulfide gas emissions, etc., resulting in soil degradation and pollution of water and atmospheric environment.

b. Pesticide itself is poisonous, and it also brings pollution to the natural environment and harm to human health while killing diseases and insect pests.

Precautions for using fertilizers:

①Ammonium nitrogen fertilizer cannot be used together with alkaline substances (such as alkali, plant ash, etc.), because NH4+ in ammonium nitrogen fertilizer encounters OH-, which will generate volatile NH3 and reduce fertilizer efficiency.

②When using ammonia water or ammonium hydrogen phosphate, prevent volatilization. Immediately irrigate or cover with soil. People should stand on the upper wind, because ammonia gas has a stimulating effect on people's eyes, nose and other membranes.

③ Nitric acid is easily decomposed by heat, and is prone to explosion at high temperature or violent impact. So when the ammonium nitrate is wet and agglomerated, do not smash it with a hammer.

④Sulfuric acid is not easy to use for a long time, so as to avoid soil acidity enhancement or soil compaction.

How to identify fertilizers:

① Look at the appearance, smell the second, and see the appearance. The nitrogen fertilizer and potash fertilizer are white crystals, and the phosphate fertilizer is gray-white powder; if you smell the smell, the hydrogen carbonate has a strong ammonia smell, which can be directly distinguished from other nitrogen fertilizers; add water to dissolve, nitrogen fertilizer , Potassium fertilizers are all soluble in water, and phosphate fertilizers are mostly insoluble in water. Identification of ammonium salts: (NH4)2SO4, NH4NO3, etc. and slaked lime are mixed and ground to release ammonia gas with a pungent odor.

②Simple identification of nitrogen fertilizers The ammonia water in nitrogen fertilizers is liquid, and carbon dioxide has a strong ammonia smell, which can be directly distinguished from other nitrogen fertilizers. Other common nitrogen fertilizers can be identified by the following steps:

Note that when ammonium sulfate, ammonium chloride and ammonium nitrate are identified at the same time, silver nitrate solution cannot be added first to identify ammonium chloride, because silver nitrate reacts with ammonium sulfate, which may generate slightly soluble silver sulfate, and may also cause precipitation. Therefore, when distinguishing the three substances containing SO42-, Cl- and NO3-, it is generally necessary to first add barium nitrate to identify the substances containing SO42-, and then add silver nitrate to identify the substances containing Cl-. It is a substance containing NO3-.

③ Fertilizer identification song

It is easy to identify chemical fertilizers, and the rust-free iron pieces are burning red; the chemical fertilizers are placed on the iron separately, and their phenomena are different; if the iron turns into water, it must be urea, which is not suspicious; if it only melts and does not emit smoke, the pungent smell is ammonium phosphate ; Sparks appear after a burst of smoke, it must be ammonium nitrate showing magical powers; the purple flame on the iron, the squeaking sound is ammonium sulfate; if you want to detect ammonium chloride, the smell of iron is like concentrated hydrochloric acid; phosphate fertilizers are mostly gray-white, placed in The smell of red iron is unpleasant; put it in red iron and it crackles, potassium sulfate without ammonia smell is different from ammoniated phosphate fertilizer, and the smokeless odor is choking; , to prevent being deceived with money.

Huaqiang Chemical Company has formed an annual output of 1.5 million tons of high-concentration ternary compound fertilizer, 1 million tons of urea, 800,000 tons of synthetic ammonia alcohol, 100,000 tons of organic fertilizer, 200,000 tons of organic-inorganic compound fertilizer, 300,000 tons of ammonium bicarbonate, 250,000 tons of hydrogen peroxide. 100,000 tons of dimethyl ether, 80,000 tons of sodium nitrate, 50,000 tons of melamine, 100 million color film woven bags, 100 million new wall tiles, 40 million square meters of high-end ceramic tile production capacity, sales revenue exceeded 6 billion Yuan is a top 500 chemical company.

For more information, please call +86 18627120543 Or send an email:info@hq-chemical.com