T/ZYNY 009-2023 Active

Scope: This document specifies the quality requirements, test methods, inspection rules, marking, user manuals, packaging, transportation, and storage of plant-based organic water-soluble fertilizers. This document is applicable to plant-based organic water-soluble fertilizers produced with organic matter as the main component. Main technical content: 3. Quality requirements 3.1 Appearance: Liquid, with no visible impurities. 3.2 Physico-chemical indicators: The physico-chemical indicators shall comply with the requirements of Table 1. Table 1: Requirements for physico-chemical indicators Organic matter content, g/L ≥100 pH value (diluted 1:250) 5.7–10.0 Water-insoluble matter content, g/L 50.0 Escherichia coli count, units/mL ≤100 Nematode egg mortality, % ≥95 Total arsenic (As) content, mg/kg ≤10 Total mercury (Hg) content, mg/kg ≤2 Total lead (Pb) content, mg/kg ≤50 Total cadmium (Cd) content, mg/kg ≤3 Total chromium (Cr) content, mg/kg ≤50 Total thallium (Tl) content, mg/kg ≤2.5