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海南杨桃叶子发黄怎么回事
更新时间: 2020-10-24 00:00:00  

叶子发黄可能是以下原因所导致:

1、土壤中氧气不足:桃树根系呼吸比较活跃,如桃树栽植在较黏重或板结的土壤中,土壤不疏松、透气性差,就会造成氧气不足,桃树根系由于呼吸受阻;

2、水分过多:桃树在生长前期水分过多;

3、土壤含盐量过高:重盐碱地种植的桃树;

4、施肥过多:施氮肥或磷肥过多,也会影响桃树对铁的吸收;

5、过重修剪:冬季过重疏剪大枝,根冠比不平衡;

6、根系有病虫危害或施入未腐熟的有机肥:有的桃园施入未腐熟的有机肥或施肥不均匀,把肥直接施在根系上而把根系烧烂。

关键词: 海南 杨桃 叶子 发黄 怎么 回事

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