First, look at the packaging and logo
For qualified fertilizers produced by regular manufacturers, the product name, nutrient and its content, net weight, implementation standards, production license number (except organic fertilizer), factory address, zip code, etc. are generally indicated in Chinese on the packaging bag; The bag is rough, the breakage rate is high, the logo is incomplete or the writing is illegible, and sometimes the Chinese characters are not used. Compound fertilizers, formulated fertilizers, organic fertilizers, organic-inorganic compound fertilizers, water-soluble fertilizers, etc. should also be marked with the fertilizer registration number. Listed below are several common fertilizers.
Superphosphate: See product name, implementation standard number (HG20413-2006), production license number, effective phosphorus (or P2O5) content ≥12.0%, free acid (in P2O5) ≤5.5%, moisture ≤15.0%. Some of the "silicon phosphate fertilizer" and "silicon calcium fertilizer" sold in the market, the main components are silicon and calcium, the effective phosphorus content is quite low, therefore, it is not a phosphate fertilizer.
Calcium magnesium phosphate fertilizer: implementation of standard number, production license number, effective phosphorus (or P2O5) content = 12.0% (qualified products)
Compound fertilizer: implementation of standard number (GB15063-2009), production license number, fertilizer registration certificate number, total nutrient content, low concentration ≥ 25.0%, medium concentration ≥ 30.0%, high concentration ≥ 40.0%. Total nutrient refers to the total amount of nitrogen + phosphorus + potassium (N + P2O5 + K20), excluding other nutrients.
Potassium dihydrogen phosphate: National industry standard stipulates that the active ingredient (KH2PO4) of agricultural potassium dihydrogen phosphate qualified product is ≥92.0% (on a dry basis). Some unscrupulous companies use fraudulent techniques to mislead consumers. The methods are as follows: 1 The packaging bag is marked with “potassium ammonium hydrogen phosphateâ€, and the word “ammonium†is deliberately written small, which is difficult to find and attracts consumers. 2 Mark “High-efficiency compound fertilizer type I (II) type on the top of the bag, and mark the potassium dihydrogen phosphate in the middle of the bag. 3 directly label the potassium dihydrogen phosphate type II. National industry standards do not have type I or type II. It is also not allowed to change potassium dihydrogen phosphate to a highly efficient compound fertilizer. Where the word "potassium dihydrogen phosphate" is not written on the package or the standard "HG2321-1992" is not implemented, it is not a true potassium dihydrogen phosphate product. Users must carefully identify it when purchasing.
Water-soluble fertilizers: There are many kinds of water-soluble fertilizer products, and the quality is uneven. Farmers' friends must carefully look at the packaging before making a purchase. First, we must look at the implementation standards, common names and nutrient content. For example, a large amount of elemental water-soluble fertilizer (standard number: NY 1107-2010), nitrogen, phosphorus, potassium, three elements, single nutrient content can not be less than 4.0% (40g / L), the sum of the three Not less than 50.0% (500g / L); trace element water-soluble fertilizer (standard number: NY 1428-2010) refers to at least one of copper, iron, manganese, zinc, boron, molybdenum, total nutrients not less than 10.0 %(100g/L), single nutrient content not less than 0.05% (5 g / L), molybdenum content not higher than 1.0% (10 g / L); amino acid soluble fertilizer (standard number: NY 1429-2010) The free acid content is not less than 10.0% (100g / L); the humic acid containing soluble fertilizer (standard number: NY 1106-2010) humic acid content is not less than 3.0% (30g / L). In addition, it depends on whether there is a production date on the package, whether the product is within the shelf life; if there is a registration certificate on the package, the qualified farmers can check whether the product corresponds to the product according to the registration number; see if there is any registered crop, apply Whether the crop exceeds the scope of registration; see if the name and address of the manufacturer are clear and standardized.
Second, look at the real thing
Different chemical fertilizers often have different appearance traits. Nitrogen fertilizers such as ammonium bicarbonate are white and have a strong ammonia odor; urea, ammonium sulfate and ammonium chloride are all white granular crystals. Phosphate Fertilizer Calcium superphosphate is gray, grayish white, light yellow and other loose powders. It can be seen as a blocky piece. It can be seen that there are many small pores, commonly known as "honeycomb eyes". Calcium superphosphate is placed in the excreta, and the free acid in it reacts with ammonium carbonate in the excreta to release carbon dioxide, and the gas in the block-shaped superphosphate "honeycomb" emits a large amount of bubbles on the surface of the excrement. Therefore, farmers believe that "the phosphate fertilizer of bubbling is good" has certain scientific reasons. Calcium magnesium phosphate fertilizer is grayish white or grayish black powder, insoluble in water, not easy to lose, no moisture absorption, no toxicity, no corrosion. The compound fertilizer has a round granular shape and a strip shape. The color is different due to different production reasons, mainly white gray and grayish black. It has a certain hygroscopicity, and the particles are easily pulverized after moisture absorption, which is non-toxic and tasteless. When the good quality product is put into the water, the particles can quickly absorb and swell and partially dissolve. There is a product called “BB Fertilizer†on the market, which is characterized by high concentration and high fertilizer efficiency, and all raw materials are visible to the naked eye. The total nutrient content of nitrogen, phosphorus and potassium is generally ≥40.0%, and the high can reach 53%, which is equivalent to twice the low-concentration compound fertilizer. Especially suitable for cash crops such as vegetables and fruits. Potassium dihydrogen phosphate White crystals, completely dissolved in water, the aqueous solution is acidic. Zinc sulphate for agriculture Appearance is white or micro-colored needle crystals. The zinc content of zinc sulfate heptahydrate should be equal to 21.8%. Zinc sulfate is readily soluble in water and its aqueous solution is acidic.
Third, look at the price
As the saying goes, "cheap is not good." The price of fake degraded fertilizer is generally lower than the price of similar high-quality fertilizer on the market.
For qualified fertilizers produced by regular manufacturers, the product name, nutrient and its content, net weight, implementation standards, production license number (except organic fertilizer), factory address, zip code, etc. are generally indicated in Chinese on the packaging bag; The bag is rough, the breakage rate is high, the logo is incomplete or the writing is illegible, and sometimes the Chinese characters are not used. Compound fertilizers, formulated fertilizers, organic fertilizers, organic-inorganic compound fertilizers, water-soluble fertilizers, etc. should also be marked with the fertilizer registration number. Listed below are several common fertilizers.
Superphosphate: See product name, implementation standard number (HG20413-2006), production license number, effective phosphorus (or P2O5) content ≥12.0%, free acid (in P2O5) ≤5.5%, moisture ≤15.0%. Some of the "silicon phosphate fertilizer" and "silicon calcium fertilizer" sold in the market, the main components are silicon and calcium, the effective phosphorus content is quite low, therefore, it is not a phosphate fertilizer.
Calcium magnesium phosphate fertilizer: implementation of standard number, production license number, effective phosphorus (or P2O5) content = 12.0% (qualified products)
Compound fertilizer: implementation of standard number (GB15063-2009), production license number, fertilizer registration certificate number, total nutrient content, low concentration ≥ 25.0%, medium concentration ≥ 30.0%, high concentration ≥ 40.0%. Total nutrient refers to the total amount of nitrogen + phosphorus + potassium (N + P2O5 + K20), excluding other nutrients.
Potassium dihydrogen phosphate: National industry standard stipulates that the active ingredient (KH2PO4) of agricultural potassium dihydrogen phosphate qualified product is ≥92.0% (on a dry basis). Some unscrupulous companies use fraudulent techniques to mislead consumers. The methods are as follows: 1 The packaging bag is marked with “potassium ammonium hydrogen phosphateâ€, and the word “ammonium†is deliberately written small, which is difficult to find and attracts consumers. 2 Mark “High-efficiency compound fertilizer type I (II) type on the top of the bag, and mark the potassium dihydrogen phosphate in the middle of the bag. 3 directly label the potassium dihydrogen phosphate type II. National industry standards do not have type I or type II. It is also not allowed to change potassium dihydrogen phosphate to a highly efficient compound fertilizer. Where the word "potassium dihydrogen phosphate" is not written on the package or the standard "HG2321-1992" is not implemented, it is not a true potassium dihydrogen phosphate product. Users must carefully identify it when purchasing.
Water-soluble fertilizers: There are many kinds of water-soluble fertilizer products, and the quality is uneven. Farmers' friends must carefully look at the packaging before making a purchase. First, we must look at the implementation standards, common names and nutrient content. For example, a large amount of elemental water-soluble fertilizer (standard number: NY 1107-2010), nitrogen, phosphorus, potassium, three elements, single nutrient content can not be less than 4.0% (40g / L), the sum of the three Not less than 50.0% (500g / L); trace element water-soluble fertilizer (standard number: NY 1428-2010) refers to at least one of copper, iron, manganese, zinc, boron, molybdenum, total nutrients not less than 10.0 %(100g/L), single nutrient content not less than 0.05% (5 g / L), molybdenum content not higher than 1.0% (10 g / L); amino acid soluble fertilizer (standard number: NY 1429-2010) The free acid content is not less than 10.0% (100g / L); the humic acid containing soluble fertilizer (standard number: NY 1106-2010) humic acid content is not less than 3.0% (30g / L). In addition, it depends on whether there is a production date on the package, whether the product is within the shelf life; if there is a registration certificate on the package, the qualified farmers can check whether the product corresponds to the product according to the registration number; see if there is any registered crop, apply Whether the crop exceeds the scope of registration; see if the name and address of the manufacturer are clear and standardized.
Second, look at the real thing
Different chemical fertilizers often have different appearance traits. Nitrogen fertilizers such as ammonium bicarbonate are white and have a strong ammonia odor; urea, ammonium sulfate and ammonium chloride are all white granular crystals. Phosphate Fertilizer Calcium superphosphate is gray, grayish white, light yellow and other loose powders. It can be seen as a blocky piece. It can be seen that there are many small pores, commonly known as "honeycomb eyes". Calcium superphosphate is placed in the excreta, and the free acid in it reacts with ammonium carbonate in the excreta to release carbon dioxide, and the gas in the block-shaped superphosphate "honeycomb" emits a large amount of bubbles on the surface of the excrement. Therefore, farmers believe that "the phosphate fertilizer of bubbling is good" has certain scientific reasons. Calcium magnesium phosphate fertilizer is grayish white or grayish black powder, insoluble in water, not easy to lose, no moisture absorption, no toxicity, no corrosion. The compound fertilizer has a round granular shape and a strip shape. The color is different due to different production reasons, mainly white gray and grayish black. It has a certain hygroscopicity, and the particles are easily pulverized after moisture absorption, which is non-toxic and tasteless. When the good quality product is put into the water, the particles can quickly absorb and swell and partially dissolve. There is a product called “BB Fertilizer†on the market, which is characterized by high concentration and high fertilizer efficiency, and all raw materials are visible to the naked eye. The total nutrient content of nitrogen, phosphorus and potassium is generally ≥40.0%, and the high can reach 53%, which is equivalent to twice the low-concentration compound fertilizer. Especially suitable for cash crops such as vegetables and fruits. Potassium dihydrogen phosphate White crystals, completely dissolved in water, the aqueous solution is acidic. Zinc sulphate for agriculture Appearance is white or micro-colored needle crystals. The zinc content of zinc sulfate heptahydrate should be equal to 21.8%. Zinc sulfate is readily soluble in water and its aqueous solution is acidic.
Third, look at the price
As the saying goes, "cheap is not good." The price of fake degraded fertilizer is generally lower than the price of similar high-quality fertilizer on the market.
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