On January 1st and July 1st this year, the National Mandatory Inspection and Quarantine Bureau introduced two essential national standards: GB18382-2001 titled "Fertilizer Identification, Content and Requirements" and GB15063-2001 titled "Compound Fertilizer (Composite Fertilizer)". These standards came into effect from the date of production and circulation. Now, many farmers are asking how to choose quality fertilizers. In this article, I’ll share some key points to consider when purchasing fertilizer.
First, the fertilizer’s name should clearly reflect its type as defined by national or industry standards, such as “compound fertilizer†or “composite fertilizer.†If the fertilizer has a special function, it should be noted in smaller font beneath the main name, like “compound fertilizer – sulfate type.†Be cautious if you see terms like “high-efficiency,†“fat king,†or “all-element fertilizer,†as these may be misleading marketing tactics.
Second, the total nutrient content must be clearly listed. This includes the percentages of nitrogen, phosphorus, and potassium. Other elements or compounds should not be included in this total. For example, a 15-15-15 NPK fertilizer should display total nutrients ≥45%. Additionally, each individual nutrient—nitrogen, available phosphorus pentoxide, and potassium oxide—should be listed in order. The single nutrient content should not be less than 4.0%. For instance, in a 15-15-15 fertilizer, all three nutrients must meet this minimum. For binary fertilizers, any missing nutrient should be marked with a “0,†such as 15-0-10, indicating no phosphorus is present. Avoid products that use symbols like “△†instead of numbers.
If the fertilizer contains micronutrients or secondary elements, they must be mentioned on both the packaging and the quality certificate. However, they should not be included in the total nutrient count.
Third, the chlorine content must be clearly labeled. If the chloride ion level exceeds 3.0%, the word “chlorine†should appear on the package. This is important because high chlorine levels can harm crops like tobacco, fruit trees, and others. If no chlorine is indicated, the chloride content must not exceed 3.0%.
Fourth, every product should come with a quality certificate or conformity certificate, which should include the manufacturing date or batch number. These details must also be visible on the outer packaging.
Fifth, the product standard must be clearly stated. Compound fertilizers must follow the mandatory national standard GB15063-2001. The standard number and serial number should be printed on the packaging.
Lastly, the manufacturer or distributor’s name and address, registered legally and responsible for product quality, should be displayed on the front of the packaging.
By following these guidelines, farmers can make more informed decisions and avoid being misled by false advertising. Always check labels carefully before making a purchase.
Reprinted from: Guangxi Agriculture Network
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