T/CPFIA 0017-2025 Microbial water-soluble fertilizer

Scope

Scope: This document specifies the technical requirements, test methods, inspection rules, labeling, packaging, transportation, and storage of microbial-containing water-soluble fertilizers. This document applies to solid or liquid water-soluble fertilizers prepared by adding single or compound microbial agents. Main technical content: 4.2 Technical Indicators The product shall comply with the technical indicators in Table 1 and the values indicated on the packaging container. Table 1: Technical Indicators for Microbial-Containing Water-Soluble Fertilizers Item Indicator Solid Liquid Effective viable bacteria (CFU) ≥200 million/g ≥100 million/ml Total nutrients (N+P2O5+K2O) ≥25.0% ≥200 g/L Organic matter ≥10.0% ≥100 g/L Water-insoluble matter ≤1.0% ≤10 g/L Water content (H2O) ≤3.0% Urea formaldehyde ≤0.9% Bacterial contamination rate ≤15% a When the added microbial agent is a compound microbial agent, the number of each effective microorganism shall not be less than 0.01 million/g or 0.01 million/ml. b The content of macronutrients refers to the sum of total N, P2O5, and K2O. The product shall contain at least two macronutrients. The content of a single macronutrient shall not be less than 4.0% or 40 g/L. The absolute value of the negative deviation between the measured value and the indicated value of each single macronutrient shall not exceed 1.5% or 15 g/L. 4.3 Limits for Toxic and Harmful Substances The limits for mercury, arsenic, cadmium, lead, and chromium in microbial-containing water-soluble fertilizers shall comply with the requirements in Table 2. Table 2: Limits for Toxic and Harmful Substances Item Indicator Mercury (Hg) (in elemental form) ≤5 mg/kg Arsenic (As) (in elemental form) ≤10 mg/kg Cadmium (Cd) (in elemental form) ≤10 mg/kg Lead (Pb) (in elemental form) ≤50 mg/kg Chromium (Cr) (in elemental form) ≤50 mg/kg Thallium (Tl) (in elemental form) ≤2.5 mg/kg

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