天气预报 > 其他 > 桂花树叶子为什么会变红
桂花树叶子为什么会变红
更新时间: 2020-09-27 00:00:00  

原因缺磷:植株深绿,常呈红色或紫色,干燥时暗绿。茎短而细,基部叶片变黄,开花期推迟,种子小,不饱满;叶片由深绿色转为紫铜色,叶脉呈黄中带紫色。花芽形成困难,开花小而少且色淡,导致果实发育不良,甚至提早枯萎凋落。

防治方法:增施骨粉、鱼粕,家禽肥或过磷酸钙、磷酸铵、磷酸钾为磷、钾复合肥,一般用0.10%左右的水溶液作根外追肥。

关键词: 桂花 叶子 为什么

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