Unverified90% confidenceDecision RuleTime unknown
叶面肥喷施浓度应控制在0.1%-0.3%（即稀释500-1000倍），超过0.5%极易灼伤叶片出现焦边黄斑，多肉和薄叶植物需减半至0.05%-0.1%
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Unverified叶面肥喷施浓度普遍控制在0.1%-0.3%（尿素0.5%-1%除外），高于0.5%的非尿素配方易灼伤嫩叶，新手应从说明书最低稀释比再稀释一倍试用85% similarUnverified叶面喷施安全浓度普遍为0.1%-0.3%，首次使用应先在部分叶片试喷24小时观察是否灼伤，宁稀勿浓；微量元素肥浓度上限低于大量元素肥81% similarUnverified叶菜类水培营养液EC值控制在1.2-1.8 mS/cm，果菜类（番茄、黄瓜）需2.0-2.5 mS/cm，观叶绿植0.8-1.2即可，浓度超标会烧根69% similarUnverified优质柴胡饮片杂质（残留茎叶、须根、泥沙）应≤3%，药典规定杂质不得过5%、水分不得过10%；饮片色泽黄棕自然、无霉斑虫蛀，切段均匀（约1cm）为佳67% similarUnverified低盐椰糠电导率(EC值)应≤0.5 mS/cm，未处理的进口椰糠EC常高达3-6 mS/cm，直接使用会导致根系烧苗，尤其对番茄、辣椒等敏感作物66% similar
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