How to tell whether drip irrigation fertilizer is true or false? 1. See if there are any product implementation standards.
What needs to be explained here is that the common name of drip irrigation fertilizer with full water solution is actually water-soluble fertilizer containing a large number of elements, and the general implementation standard is NY1107-2010. If this standard does not appear on the package, it means that it is not a water-soluble fertilizer containing a lot of elements.
The standards marked on the packaging of many large-element water-soluble fertilizers begin with GB, indicating that such products are unqualified.
In addition, it depends on whether it has a fertilizer registration number. If vegetable farmers have questions about the product, they can check its fertilizer registration number, qualified macro-element water-soluble fertilizer and fertilizer registration number online, and the manufacturers can find it. If it is not found, the product is unqualified.
Look at the inspection report or certificate. All water-soluble fertilizers produced by regular manufacturers must have inspection reports or certificates in the packaging boxes to clearly inform consumers of the product quality inspection results of this batch of fertilizers.
Second, see if the heavy metal content is marked.
The contents of heavy metals and water-insoluble substances in a large number of elemental water-soluble fertilizers produced by regular manufacturers are lower than the national standards and clearly marked. If the fertilizer packaging bag is not marked with heavy metal content and impermeability, it should be used with caution.
Third, dissolve a little fertilizer with the right amount of water.
High-quality water-soluble fertilizer containing a large number of elements can be quickly dissolved in water, such as Lamla's special fertilizer. The solution is clear, without residue and sediment. If other fertilizers are not completely soluble in water and have residues, the quality of fertilizers is not very good.
Fourth, look at the particles of fertilizer.
The water-soluble fertilizer products with good quality have uniform particles and are crystalline (the particle size is similar to that of salt particles). If the fertilizer particles of water-soluble fertilizer are different in size, and the large particles are similar to compound fertilizer or urea, it is best not to buy them.
You can refer to the above methods to distinguish between true and false and make a reasonable choice.
How to identify the true and false chemical fertilizer? Especially irrigation? The problem of too many fakes is difficult.
How to identify fake and inferior chemical fertilizers as important agricultural means of production is directly related to agricultural production and farmers' interests. In order to put an end to fake and inferior chemical fertilizers, reduce farmers' losses and promote the development of agricultural production in our county, the identification methods of several main types of fake and inferior chemical fertilizers are introduced to farmers for correct purchase.
A, fake and inferior urea identification method:
There are generally two kinds of counterfeit urea in the market: one is packed in a fertilizer bag with urea on it, and the other is ammonium bicarbonate, which is sold as urea. Identification method: the bag can be turned flat on the ground. If the fertilizer above flows, the fertilizer below does not flow, even caking occurs, and ammonia can be smelled. In this case, it can be judged that urea and ammonium bicarbonate are mixed. Secondly, urea and ammonium carbonate are mixed. Both fertilizers are granular fertilizers, white and ammonia-free, and have good fluidity. White smoke comes out after burning. The difference is that urea particles are large, translucent and loose, and there is no reflective and moist feeling. If placed on red-hot charcoal or iron plate, it will burn violently, giving off strong light and "stinging" sound. If this happens, it can be judged that ammonium carbonate is mixed in urea.
Second, identification of fake and shoddy diammonium phosphate.
At present, granular superphosphate is widely used as diammonium phosphate in the market, and some granular superphosphate is also used as nitrophosphate or bicarbonate. These fertilizers are similar in color, particle shape and compressive strength, but quite different in composition, nutrient content and price, which can be identified by the following methods:
(1) From the appearance, diammonium phosphate is an irregular particle. When it is not wetted, the center is dark brown, the edge is yellowish, the outer edge of the particle is slightly translucent, and the surface is slightly smooth. After wetting, the particle color is dark brown, and there is no yellow and transparent edge feeling. After being wetted by water, the particles behave the same as those affected by water, and a little powder white appears on the surface. Nitrophosphate has obvious transparency, smooth particle surface and dark brown irregular particles; Calcium superphosphate granular fertilizer is dark gray, and the color of calcium superphosphate granules is light, gray and light gray, and the surface smoothness is poor.
(2) Water-soluble method: Nitrophosphate, diammonium phosphate and calcium superphosphate are all soluble in water, while granular calcium superphosphate is not completely soluble in water.
(3) Combustion method: Diammonium phosphate, nitric acid and phosphate fertilizer can be melted quickly when burned on red carbon, releasing ammonia, while calcium superphosphate and calcium phosphate have no ammonia smell, especially calcium superphosphate, and the particle shape has not changed at all.
(four) when necessary, through the laboratory to do quantitative analysis.
Third, the identification of fake and shoddy compound fertilizer.
At present, most of the high-nitrogen compound fertilizers sold in the market are high-nitrogen compound fertilizers with ternary nutrients greater than or equal to 45%, and the particles are irregular, white and grayish brown. Kaolin as binder is yellow-brown and pink-brown. False compound fertilizer is generally sludge, garbage, soil particles, coal ash and other particles. Generally does not contain nitrogen fertilizer. Identification method:
(1) Appearance: Nitrogen fertilizer, especially urea and compound fertilizer containing more nitrate and ammonia, has proper furnace temperature, good surface melting state of particles, smooth appearance, rough surface of fake compound fertilizer, and no traces of urea and potassium chloride.
(2) Combustion method: Compound fertilizer can melt, bubble and smoke on red-hot iron plate or charcoal, emitting a small amount of ammonia smell, and the particle deformation becomes smaller. The more nitrogen, the faster it melts, the higher the concentration and the less residue. There is no change between granular phosphate fertilizer and counterfeit compound fertilizer, and combustion method can be used as the main method to identify true and false compound fertilizer and its concentration.
(3) The most accurate method is through laboratory sampling and quantitative analysis.
What about the inferior chemical fertilizer bought by farmers? Get back! Then leave a receipt for buying fertilizer and some samples of fertilizer. Find someone on agricultural machinery
How will fertilizer farmers inform farmers' customers of your meeting time, content and place through distributors! Invite your own experts to give a lecture and have a meeting!
20 15 annual leave fertilizer which fake fertilizers were exposed? Shandong Administration for Industry and Commerce announced the results of sampling inspection of fertilizer quality in circulation field in Dezhou in the first half of 20 15 in official website. Among them, the compound fertilizer with the trademark "Chunyu" produced by Shandong Chunyu Fertilizer Co., Ltd. is 12.04%, which is lower than 15% (-65438). The detection result of chloride ion is 13.7%, which is higher than the requirement of 3%, and the total detection result is 42.47%, which does not meet the technical requirement of 45%. ".
When do farmers buy fertilizer? Different areas, different crops and different time to use fertilizer … it depends on where you are …
How to identify fake and inferior chemical fertilizer products Agricultural law enforcement products should contain at least two trace elements, or learn from previous experience to buy, and have obvious labels and water-soluble fertilizers containing amino acids. A variety of products, medium element water-soluble fertilizer, NY 1428-20 10 "Trace element water-soluble fertilizer", registration number, water-soluble fertilizer registered in the Ministry of Agriculture. For unregistered crops, whether they are regular products can be seen by the label alone, indicating that such products are unqualified, with a content of 0.5%-3.0%; Fertilizer registration certificate number. From the packaging, we can distinguish the true and false fertilizers: water-soluble fertilizers containing a large number of elements, the sum of which should not be less than 50%, zinc, common product names and fertilizer registration certificate number. At present, the industrial standards of water-soluble fertilizers are NY1107-2010 "Water-soluble fertilizers containing a large number of elements" and boron. Common names are the above. If you see a large number of elements labeled less than 6%, NY1106-2010 "Humic acid-containing water-soluble fertilizer" and so on. , nitrogen and phosphorus. According to the standard of water-soluble fertilizer with a large number of elements, there is no need to open the package, organic water-soluble fertilizer and so on. , which is the beginning of NY. Trace element content refers to copper. Fourth, it depends on whether the heavy metal content and humic acid-containing water-soluble fertilizer are marked on the packaging bag. Third, it depends on whether there is a product implementation standard. Take water-soluble fertilizer as an example, the single nutrient content of potassium should not be less than 6%. At present, the water-soluble fertilizers sold in the market mainly include molybdenum and the sum of molybdenum. First, it depends on the contents of macro-elements, trace elements and manganese on the packaging bag. First of all, look at the packaging label. If the heavy metal content is not marked on the fertilizer packaging bag: agricultural fertilizer (* * * *) forest (quasi) word * * * *. For example, a water-soluble fertilizer contains a lot of elements, or the sum of the three elements is less than 50%. Water-soluble fertilizers are registered according to experimental crops. Most of the water-soluble fertilizers are industry standards of the Ministry of Agriculture. The second is to look at the product formula and registered crops, which can be one or several crops. The heavy metal content of water-soluble fertilizer produced by regular manufacturers should meet the national standards, so please use it with caution.