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一、空心1、发病原因:芹菜空心除与品种有关外,发生的主要原因有两个,一是缺肥引起,二是不良气候条件引起。芹菜适宜富含有机质、保水保肥力强的壤土或粘壤土,砂土、砂壤土容易缺水缺肥,使芹菜叶柄和茎发生空心现象。特别是缺氮肥,不仅使生育受阻碍,植株长不大,而且叶柄易老化空心。当然空心不一定都是缺肥引起,遇到高温、干燥或低温受冻,使营养物质的运输、分配受阻,也会引起空心。
First, the hollow 1, the cause of the disease: In addition to celery hollow species, there are two main reasons, one caused by lack of fat, the second is caused by adverse weather conditions. Celery is rich in organic matter, water and fertility of loam or clay loam, sandy soil, sandy loam easy to lack of water and lack of fat, so celery petiole and stem hollow phenomenon. In particular, nitrogen deficiency, not only obstruction of fertility, plant growth is not long, and petiole easy to aging hollow. Of course, hollow are not necessarily caused by lack of fat, encountered high temperature, dry or cold frost, so that the transport of nutrients, blocked distribution, can also cause hollow.