Experts suggest that farmers discriminate between genuine and fake fertilizers, mainly from the identification of packaging bags, and check whether they comply with national standards and related regulations. At the same time, do not covet small favors from mobile traders, and start from a well-reputed, high-reputation agricultural store Buy products from regular manufacturers.
Only nitrogen, phosphorus, and potassium are counted in the total nutrients. At present, in the national standards of China's chemical fertilizers, regardless of urea, diammonium, or compound fertilizers, only three elements of nitrogen, phosphorus, and potassium can be counted in the total nutrients of the product. For example, for a fertilizer called urea, the nitrogen nutrient must reach 46%, and the nitrogen and phosphorus nutrients called diammonium must reach 57% and 64%. And don't look at other nutrients, other calculations into the total nutrients, it is blind.
Experts point out that if nutrients other than nitrogen, phosphorus, and potassium are included in the total nutrients in the fertilizer label, it is a violation of national labeling requirements and there is a suspected fraud. For example, for compound fertilizers, a common counterfeiting method is known to have a variety of functions, and by this, non-nitrogen, phosphorus, potassium and other elements are mixed into the fisheye mixed beads.
Choose fertilizers according to needs In addition to identifying the total nutrient label, farmers must learn to choose fertilizers based on crops. For example, buying compound fertilizers depends on the content of chlorine, and pay attention to low, medium or high chlorine. Non-chlorine or low-chlorine fertilizers are generally applied to cash crops such as vegetables and fruit trees. Because of the large amount of fertilizer applied, the accumulation of chlorine will cause crop growth to be hindered, soil salinization, compaction, and reduced fertility.
For another example, urine-based compound fertilizers that are also not suitable for vegetables and fruit trees cannot be used as seed fertilizers. When applying urea-based compound fertilizer, the fertilizer and seed must be separated by a distance of more than 8 cm, and the base fertilizer should be kept as far away from the root system as possible, and should not be applied to the root hair area.
Tips for buying chemical fertilizers are to see the fertilizer name and trademark, and whether the logo is scribbled.
Look at information such as active ingredient content and net weight. A single fertilizer should indicate the percentage content of a single ingredient, a compound fertilizer should indicate the percentage and total content of various ingredients such as N, P2O5, K2O, etc. There should also be items that should be separately indicated in product standards, such as chlorine, citrus Soluble phosphorus. The state stipulates that no element or compound other than nitrogen, phosphorus and potassium can be recorded in the total nutrients.
Look at the product standard number, such as national standard GB, Ministry of Chemical Industry Standard HG, Ministry of Agriculture Industry Standard NY.
Look at the production license number, production or distribution unit address, contact information and other valid information.
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