Discrimination of true and false water-soluble fertilizer

As a new type of fertilizer matched with water-saving irrigation agriculture, three-dimensional high-efficiency cultivation, high-yield and high-quality cultivation techniques, water-soluble fertilizer has the characteristics of improving fertilizer utilization efficiency, saving energy and environmental protection, saving water, saving fertilizer, saving labor and increasing production. It is one of the important directions of fertilizer development in the future. Recently, the industry expert interviewed by the reporter said that at present, water-soluble fertilizer products are mixed, and many manufacturers are fighting for our land to occupy the new fertilizer market, and liquid water-soluble fertilizer is one of them. so how should growers and dealers in the agricultural market correctly choose and buy high-quality liquid fertilizer? What are the practical and simple methods? Experts teach you to distinguish liquid water-soluble fertilizer at five points.

One is to see with the naked eye. Liquid water-soluble fertilizer is clear and transparent, no impurities, the bottle can be inverted to observe whether there is suspended flocculent precipitation or other insoluble matter, etc., the selection of this product should be cautious.

The second is weighing. According to industry standards, each product has the requirement of minimum nutrient element content. Each nutrient element in liquid water-soluble fertilizer is measured in g hammer L, which means the mass of nutrient elements per unit volume. The greater the value, the heavier the liquid product of the same volume, the greater its specific gravity. The specific gravity of qualified amino acid, humic acid and organic water-soluble fertilizer liquid fertilizer is generally more than 1.25 (that is, the weight of 1L is above 1.25kg). The proportion of large, medium and trace element liquid fertilizers is more than 1.35 (that is, the weight of 1L is above 1.35kg).

The third is odor discrimination. High-quality liquid water-soluble fertilizer has no obvious smell, such as Germany's new land water-soluble fertilizer has no obvious smell, and there is only a little ammonia smell, which is similar to the aqua privies where ammonia has not been taken out for a long time. There is no pungent smell such as peeled "opium fish" that irritates the eyes. If there are other pungent odors, other ingredients are added.

The fourth is freezing test. Liquid water-soluble fertilizer frozen in the refrigerator day and night if there is no delamination, crystallization phenomenon is high-quality fertilizer. And those stratified crystallization products are caused by the failure to select raw materials and control the production process, and the quality is not up to standard.

Fifth, test paper testing. The pH value of liquid soluble fertilizer with high content is close to neutral or weakly acidic and alkaline, and strong acid or alkali will appear when the technology of some small factories is relatively low.