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西红柿顶部叶子发黄

更新时间: 2020-07-04 00:00:00     

原因:植株根系对养分吸收差,对营养元素的利用率不高,从而出现这种情况。这种情况与连年重茬、施肥不当有关,施用不腐熟的有机肥造成烧根,长期连续施用或过量施用化学肥料造成土壤板结,土壤中盐离子浓度过高导致根系生长差,营养不协调有关。

解决办法:

1、喷洒含有铁或锌元素的叶面肥:喷洒绿芬威2号或瑞绿或百分之0.1的硫酸亚铁,补充铁元素,喷上部叶片为主。硫酸亚铁不适于直接往土壤中施用,否则会破坏土壤;

2、养根用甲基托布津600倍加生根剂如金回报、生根壮苗剂灌根,往土壤中

关键词: 西红柿 顶部 叶子 发黄

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