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葱尖发黄是什么原因
更新时间: 2020-11-09 00:00:00  

葱尖发黄的原因:土壤湿度过大。大葱原产中亚、西亚等地,耐干旱,不耐过大湿度。空气湿度过大。大葱叶的表面有一层蜡质,具有保护水分散失的作用,蒸腾作用较小。病害严重。由于多年的连作,土传病害严重,造成软腐病、枯萎病、根腐病、霜霉病的大量发生。

关键词: 发黄 什么 原因

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