T/CGAPA 011-2023 Guidelines for the Safe Use of Mercury-Contaminated Rice Fields

Scope

Main technical content: 1. Scope: This document specifies the basic requirements for safe production in mercury-contaminated paddy fields, as well as the techniques and methods for field operations. This document is applicable to moderately and lightly mercury-contaminated paddy fields, and soils in rotation with rice and other crops. 2. Normative references: The content of the following documents is incorporated into this document through normative references. Among them, the referenced documents with a specified date only apply to the version corresponding to that date; for those without a specified date, the latest version (including all amendment lists) applies to this document. 3. Terms and definitions: The following terms and definitions apply to this document. - "Arable land at the level of safe use": Arable land with total soil heavy metal concentrations exceeding the GB 15618 screening value but below the national control value. - "Safe use of mercury-contaminated paddy soils": The safe use of mercury-contaminated paddy fields, which means achieving rice mercury content that does not exceed the GB 2762 limit value, without significant reductions in rice yield or deterioration in soil quality, through individual or combined use of techniques such as pollutant source control, soil amendment, and agronomic measures, including the selection of rice varieties with low mercury accumulation and water-fertilizer management. 4. Requirements and specifications 4.1.1 Technical indicators

Development Information

Related Standards