Liquid fertilizer advantages and disadvantages

According to industry standards, the current market generally has six kinds of liquid fertilizers: amino acids, humic acids, trace elements, medium-quantity elements, large quantities of elements, and organic water-soluble fertilizers. Although the types are different, the quality of resolution is much the same, mainly from the following aspects: Two, three, four, and five tests.

Look at the physical state of the liquid fertilizer product is clear and transparent, clean and free of impurities, suspended solids such as amino acids, humic acid and other black solution is not transparent, but after inverting carefully observe the bottom of the bottle is not precipitated, and the quality of the product bottle may have a lot of solid Insolubles.

Product weight Each product has a minimum nutrient content requirement. Each nutrient element in liquid fertilizer is measured in grams per litre. The larger the value, the heavier the same volume of liquid product is. Therefore, the proportion of specific gravity is an important indicator to measure the quality of liquid fertilizer products. A good product does not necessarily have a large proportion, but a certain percentage with a small specific weight is not sufficient. The proportion of qualified liquid amino acids, humic acid and organic water-soluble fertilizers is generally above 1.25, that is, the weight of 1 liter of liquid fertilizer is more than 1.25 kg, and the specific gravity of large, medium and trace elements of liquid fertilizer is above 1.35.

No smell was noticed in products with good odor. Some products had slightly ammonia smell in weak acid or slightly alkaline conditions. There is a strong ammonia smell is not a good grasp of pH, a special smell is generally to cover some of the smell, a pungent odor is generally added material should not be added.

Freeze-test products with good stability do not delaminate when they are frozen in a refrigerator for 24 hours. Those products that are stratified and crystallized are usually not selected for raw materials and have good control of the production process.

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