GB/T 43419.3-2023Remediation and control of heavy metals in paddy field—Part 3: Physiological barriers (English PDF)
稻田重金属治理 第3部分：生理阻隔
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Issued by
SAMR; SAC
Level / Type
National · Recommended
Issue date
November 27, 2023
Implementation date
March 1, 2024
Scope
GB/T 43419.3-2023 is the English-translated version of 稻田重金属治理 第3部分：生理阻隔.
GB/T 43419.3-2023 is the part of the Chinese national paddy-field series that covers physiological barrier agents, which act on the crop rather than on the soil.
It sets out silicon-based barriers, manganese barriers, the selection and combination of the two techniques and the prevention of secondary environmental risk, with dosages in an informative Appendix A. For cadmium contamination it advises a silicon agent where the available silicon of the soil, extracted with 0.025 mol/L citric acid and read by the silicon-molybdenum blue colorimetric method, is below 100 mg/kg, at a dose equivalent to 3 kg/hm2 to 6 kg/hm2 of pure silica, raised for certain control-unit grades, for rice varieties that accumulate heavy metals strongly and for late-season planting. Issued on 27 November 2023, it has applied since 1 March 2024.
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Document preview — GB/T 43419.3-2023
National Standard of the People's Republic of China
- ICS
- 13.080
- Classification
- Z 05
Issued by: State Administration for Market Regulation; Standardization Administration of the PRC
Contents
- Preface
- Introduction
- 1 Scope
- 2 Normative references
- 3 Terms and Definitions
- 4 Silicon-based physiological barrier
- 5 Manganese physiological barrier
- 6 Technology Selection and Combination
- 7 Secondary environmental risk prevention
- Appendix A (informative) Physiological barrier agent dosage
Foreword
This document complies with the provisions of GB/T 1.1-2020 "Standardization Work Guidelines Part 1: Structure and Drafting Rules of Standardization Documents" Drafting.
This document is Part 3 of GB/T 43419 "Heavy Metal Control in Rice Fields". GB/T 43419 has published the following parts.
---Part 1. General provisions;
---Part 2. Passivation conditioning;
---Part 3. Physiological barrier.
Introduction
GB/T 43419 "Heavy Metal Control in Rice Fields" is a technical standard to guide the control of heavy metals in rice fields. It aims to guide the management of heavy metals in rice fields.
Work process, through selecting appropriate treatment technologies, to achieve safe production in contaminated rice fields. GB/T 43419 is planned to consist of three parts.
---Part 1. General principles. The purpose is to provide general technical guidance for the entire process of heavy metal control in rice fields.
---Part 2. Passivation conditioning. The purpose is to select appropriate soil control methods for single and compound pollution of cadmium, mercury, arsenic, lead and chromium in rice fields. Provide technical guidance on appropriate passivating conditioners.
---Part 3. Physiological barrier. The purpose is to provide technical guidance for selecting appropriate physiological barrier agents for heavy metal control in rice fields.
This document is Part 3 of GB/T 43419. Through the implementation of physiological barrier measures, the content of heavy metals in edible parts of agricultural products is reduced, so as to Reduce the risk of excessive heavy metals in agricultural products, promote the production of agricultural products that meet standards, and provide standardization for the development of heavy metal control and environmental protection industries in rice fields. support. Heavy metal control in rice fields Part 3. Physiological Barrier
1 Scope
This document stipulates silicon-based physiological barriers, manganese physiological barriers, technology selection and combination, and secondary environmental risk prevention in heavy metal treatment in rice fields. Fan et al.
This document is applicable to the implementation of physiological barrier technology for heavy metal pollution in rice fields.
2 Normative reference documents
The contents of the following documents constitute essential provisions of this document through normative references in the text. Among them, the dated quotations For undated referenced documents, only the version corresponding to that date applies to this document; for undated referenced documents, the latest version (including all amendments) applies to this document.
GB 15618-2018 Soil Environmental Quality Agricultural Land Soil Pollution Risk Management and Control Standards (Trial)
GB/T 43419.1 Heavy metal control in rice fields Part 1: General principles
3 Terms and definitions
The terms and definitions defined in GB/T 43419.1 and the following apply to this document.
3.1 physiological barrier agent
It has the physiological functions of regulating the antagonism, absorption, transport, accumulation and detoxification of heavy metal ions and reducing the risk of excessive heavy metals in agricultural products. substance.
3.2 manganese physiological barrier agent
It has the physiological functions of regulating the antagonism, absorption, transport, accumulation and detoxification of heavy metal ions, and reduces the risk of excessive heavy metals in agricultural products. Manganese-containing substance.
4 Silicon-based physiological barrier
4.1 Selection of silicone-based physiological barrier agents
4.1.1 Silicon physiological barrier
In view of cadmium pollution in rice fields, when using 0.025 mol/L citric acid extraction and silicon-molybdenum blue colorimetric method to determine the effective silicon content of the soil, it is lower than When 100mg/kg, it is advisable to choose a silicone physiological barrier agent. The application dose is equivalent to 3kg/hm2~6kg/hm2 of pure silicon dioxide. When the treatment unit, etc.
When the level is II2, the dosage should be increased appropriately. When rice varieties have a strong ability to accumulate heavy metals or are planted in late seasons, spraying should be increased. dose.
4.1.2 Selenium-silicon composite physiological barrier
In response to cadmium, arsenic, and mercury pollution in rice fields, when the physiological barrier of silicon cannot meet the compliance rate requirements for heavy metal content in rice, selenium-silicon composite biomass should be selected.
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This preview omits tables, figures, formulas and parts of the technical clauses. The complete document — 15 pages — is available in the English PDF.
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Related Standards
GB 15618-2018 — Soil environmental quality - Risk control standard for soil contamination of agricultural land (trial)
GB/T 43419.1-2023 — Remediation and control of heavy metals in paddy field—Part 1: General principles
GB/T 43419.2-2023 — Remediation and control of heavy metals in paddy field—Part 2: Immobilization
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