Unverified88% confidenceDecision RuleTime unknown
叶片老叶先黄、叶脉间黄化呈条纹状多为缺镁，选硫酸镁（泻盐）叶面喷施浓度0.1%-0.2%（1-2g/L）即可，浓度过高易灼伤
1
Sources
88%
Confidence
Long-term
Relevance
-
First Seen
Sources
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Unverified叶片喷施时醋酸调节液浓度应更低（1:800以上），且避开正午强光和幼嫩新芽，浓度过高会灼伤叶面表皮76% similarUnverified选购时查看二氧化硫残留量，国标GB2760规定蜜饯类≤0.35g/kg，颜色异常鲜亮（如金黄杏脯、鲜红山楂）多为过量硫处理，选择颜色偏暗自然的更安全64% similarUnverified低温阴干或40-50℃烘干的茵陈能保留挥发油和绿原酸，颜色灰绿、香气足；高温暴晒或炒制的成品发黄褐、香气散失，利胆退黄成分损耗明显64% similarUnverified去壳核桃仁看果肉颜色：正常为淡黄至浅琥珀色，若发黑、发深褐或表面有油亮渗出说明已氧化哈变；核桃油脂含量高达60%以上，去壳后接触空气3个月内风味明显下降63% similarUnverified叶片饱满油亮、无黄边焦尖为健康标志；叶片过密且颜色异常深绿可能是催长/打光养护，到家后易大量落叶63% similar
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