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In recent years, the gradual development of special compound fertilizers for various crops has greatly promoted agricultural production, and the application of compound fertilizers has become more and more common. Coverage has also grown, and more and more crops have been involved. , From compound fertilizers for grain and cotton oil crops, to compound fertilizers for economic and efficient crops, from two-component compound fertilizers to ternary compound fertilizers, from low-content compound fertilizers to high-content compound fertilizers, from NPK fertilizers, to High-efficiency bio-organic compound fertilizers, from domestic compound fertilizers to imported compound fertilizers, to imported compound fertilizers, are becoming more and more abundant, and their use effects are more and more ideal. They are deeply favored and welcomed by the majority of farmers.
However, looking at the current agricultural product sales market, it is not optimistic. Some manufacturers and individuals are only profit-seeking. Producing or manufacturing a large number of fake and shoddy products floods the rural market, making it difficult for people to prevent, and many farmers suffer losses. Although administrative law enforcement agencies at all levels have taken some measures to clear and rectify the fertilizer market, they have achieved certain results, but the act of counterfeiting and counterfeiting still exists within a certain range. Therefore, it is also necessary for the farmers' friends to understand some of the basic knowledge of compound fertilizers and how to identify simple and true identification methods for compound fertilizers.
1, packaging identification method. Mainly to see whether the packaging according to compound fertilizer packaging requirements, the three certificates (ie, production license, fertilizer registration certificate, product certification) is complete and effective, but also depends on whether the content is consistent with the internal content, must let the seller provide Laboratory test sheets for legal effects (when necessary, sampling to authoritative soil and fertilizer testing departments for laboratory tests). Don't be fooled and deceived, and don’t overly believe in rhetorical advertising and beautifully designed external packaging. The most important is It depends on the internal quality.
2, simple visual measurement method. In general, as long as it is genuine, special compound fertilizers must go through a complicated procedure, or be extruded into pellets or pelletized by discs. The color performance is simple, or grayish or light gray, with few variegated colors. Granulation is relatively uniform, or spherical or cylindrical. The counterfeits and special compound fertilizers are mostly not deep-processed, but are produced in a rough or mixed manner. The colors are not pure, and there are variegated colors, and the granulation is uneven, and some of them are not granulated and flour-like.
3, hand pinch feeling method. The real compound fertilizer is generally made by high-temperature melting, cooling and granulation and then dried. It has good stability, high hardness, and uniform hardness. It is not easily broken by hand and it is not easy to be soft. The counterfeit compound fertilizer has poor hardness, inconsistent hardness, easy pinching, or soft and muddy.
4, odor law. A small handful of compound fertilizer is placed on the nose and sniffed. If ammonia odor is found, it is a low-level compound fertilizer with a mixture of ammonium bicarbonate and a low total content. If other odors are found, they are often counterfeit special compound fertilizers. The true special compound fertilizer or the total nutrient content of more than 25%, generally has the advantages of stable composition, no decomposition or melting, etc., so no odor will appear, and ammonia smell will not appear.
Four methods to identify true and false compound fertilizers