GB/T 21633-2020Bulk blending fertilizer (English PDF)

Foreword

This standard was drafted in accordance with the rules given in GB/T 1.1-2009.

This standard replaces GB/T 21633-2008 "Blend Fertilizer (BB Fertilizer)", compared with GB/T 21633-2008, except for editorial changes In addition, the main technical changes are as follows.

---Modified the scope (see Chapter 1, Chapter 1 of the 2008 edition);

---Added the terms and definitions of middle element and trace element (see 3.5 and 3.6);

---Adjusted the particle size range and improved the particle size index (see Table 1, Table 1 of the 2008 edition); refined the chloride ions that indicate chlorine-containing products Content requirements and testing methods (see Table 1, 6.6, Table 1, 5.7 in the 2008 edition); adjusted the quality of the single nutrient Number indicators and detection methods (see Table 1, 6.7, Table 1, 5.8 in the 2008 edition);

--- Increased the limit requirements for toxic and hazardous substances (see 4.3);

--- Modify the element "sampling plan" to "sampling" (see Chapter 5, 2008 edition of 6.3 and 6.4);

---Added nutrient content determination methods for selection (see Chapter 6);

--- Adjusted type inspection items and factory inspection items (see 7.1, 6.1 of the 2008 edition);

--- Detailed product labeling regulations (see Chapter 7, Chapter 7 of the 2008 edition).

1 Scope

This standard specifies the terms and definitions, technical requirements, sampling, test methods, inspection rules, labels and quality certificates of blended fertilizers (BB fertilizers) Instructions, packaging, transportation and storage.

This standard applies to mixed fertilizers (BB fertilizers) made by dry mixing methods with at least two of the three nutrients of nitrogen, phosphorus, and potassium.

It is applicable to slow-release and controlled-release blended fertilizers; this standard is also applicable to dry-mixed compound fertilizers with nitrogen and (or) phosphorus and (or) potassium fertilizer particles.

This standard does not apply to dry-mixed organic particles and (or) biological agent particles and (or) microelement particles on the basis of compound fertilizers. product.

2 Normative references

The following documents are indispensable for the application of this document. For dated reference documents, only the dated version applies to this document.

For undated references, the latest version (including all amendments) applies to this document.

GB/T 6679-2003 General rules for sampling of solid chemical products

GB/T 8170 Numerical rounding rules and the expression and determination of limit values

GB/T 8569 Solid chemical fertilizer packaging

GB/T 8572 Determination of total nitrogen content in compound fertilizers by titration method after distillation

Determination of available phosphorus content in GB/T 8573 compound fertilizer

GB/T 8574 Determination of potassium content in compound fertilizers. Potassium tetraphenylborate gravimetric method

GB/T 8576 Determination of free water content in compound fertilizers Vacuum oven method

GB/T 8577 Determination of free water content in compound fertilizers Karl Fischer method

Determination of copper, iron, manganese, zinc, boron, and molybdenum content in GB/T 14540 compound fertilizer

GB/T 15063-2020 compound fertilizer

GB 18382 Fertilizer labeling content and requirements

GB/T 18877-2020 Organic-inorganic compound fertilizer

Determination of calcium, magnesium and sulfur content in GB/T 19203-2003 compound fertilizer

GB/T 22923 Determination of Nitrogen, Phosphorus and Potassium in Fertilizers by Automatic Analyzer

GB/T 24890 Determination of chloride ion content in compound fertilizer

GB/T 24891 Determination of particle size of compound fertilizer

GB/T 34764 Determination of copper, iron, manganese, zinc, boron and molybdenum content in fertilizers by plasma emission spectrometry

GB 38400 Limit requirements for toxic and hazardous substances in fertilizers

NY/T 1117-2010 Determination of calcium, magnesium, sulfur and chlorine content in water-soluble fertilizers

NY/T 2540-2014 Determination of potassium content in fertilizers

NY/T 2542-2014 Determination of total nitrogen content in fertilizers