GB/T 21633-2020 in English
VALIDBulk blending fertilizer
- Issued on:2020-11-19
- Implemented on:2021-06-01
- File Format:PDF
- Delivery:Via email within 1~3 business days
$214.00
| Standard No: | GB/T 21633-2020 |
| Document status: | VALID |
| Title in English: | Bulk blending fertilizer |
| Title in Chinese: | 掺混肥料(BB肥) |
| Language: | English |
| File Format: | Electronic (PDF) |
| Delivery: | Via email within 1~3 business days |
| Issued on: | 2020-11-19 |
| Implemented on: | 2021-06-01 |
| ICS Classification: | 65.080-Fertilizers |
| Chinese Classification: | G21-Chemical fertilizer and chemical soil conditioner |
| Professional Classification: | GB-National Standard |
| Related Topics: | Fertilizer Standard
Fertilizer Moisture Meter Fertilizer Moisture Meter European Fertilizer Standard blended fertilizer Admixture test Admixture test Fat mix bb icp fertilizer gb/t21633-2008 fertilizer execution Glycosides Blended fertilizer (BB fertilizer) GBT21633 GB/T 21633-2008 GBT 21633-2020 blended fertilizer Blended fertilizer (BB fertilizer) fertilizer gb21633 gb/t 21633-2020 gb/t21633 |
本标准规定了掺混肥料（BB肥)的术语和定义、技术要求、取样、试验方法、检验规则、标识和质量证明书、包装、运输和贮存。本标准适用于氮、磷、钾三种养分中至少有两种养分标明量的由干混方法制成的掺混肥料（BB肥)，适用于缓释型、控释型的掺混肥料；本标准也适用于干混补氮和（或)磷和（或)钾肥料颗粒的复合肥料。本标准不适用于在复合肥料基础上仅干混有机颗粒和（或)生物制剂颗粒和（或)中微量元素颗粒的产品。
Introduction
Core changes in the standard revision
| Revision dimensions | 2008 version | 2020 version | Technical impact |
|---|---|---|---|
| Chloride ion classification | Single threshold | Low chlorine (≤15%)/medium chlorine (≤30%)/high chlorine classification | Packaging labeling must be selected according to actual content |
| Toxic substance control | Not specified | New limit values such as biuret ≤0.8% | Raw material traceability testing required |
| Medium and trace elements | Not specified | Calcium/magnesium ≥1%, sulfur ≥2%, trace elements ≥0.02% | Effectiveness of addition needs to be verified |
Analysis of key technical requirements
Key points of particle size control
The standard requires that 2.00-4.75mm particles account for ≥90%, and it is recommended to pass:
- The SGN value of the raw materials is controlled in the range of 280-340
- UI uniformity index The difference does not exceed 15%
- Screening pretreatment before mixing
Compatibility Implementation Recommendations
Strictly control the following high-risk combinations:
- Urea + Ammonium Nitrate: The critical humidity drops to 18% after mixing
- Superphosphate + Urea: Release of crystal water leads to agglomeration
- Ammonium salt + alkaline substance: Causes ammonia volatilization loss
Test Method Selection Guide
| Test Items | Arbitration Method | Alternative Method |
|---|---|---|
| Total Nitrogen | Titration after Distillation (GB/T8572) | Automatic analyzer method (GB/T22923) |
| Chloride ion | Volumetric method (GB/T24890) | Potentiometric titration (NY/T1117) |
| Trace elements | ICP emission spectrometry (GB/T34764) | Atomic absorption method (GB/T14540) |
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