Unverified85% confidenceDecision RuleTime unknown
腐殖酸含量应看水溶性（黄腐酸）比例而非总量：黄腐酸占比≥30%的产品才具备快速活化土壤和促根效果，仅标注'腐植酸总量50%'但不标黄腐酸的多为矿源风化煤直磨，见效慢
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