西芹的食用部分主要为实心的叶柄 ,但有时叶柄会发生空心现象。据调查 :产生空心的主要原因有 :过熟未及时采收 ;不良环境的影响 ;植株间相互竞争等。根据本地经验 :预防西芹空心 ,可采取以下“四招”。一、成熟时及时采收春季栽培 ,一般应在抽薹前采收 ,秋季露地栽培则应在霜 Celery mainly edible part of the solid petiole, but sometimes petiole hollow phenomenon occurs. According to the survey: the main reasons for the hollow have: over-cooked not timely harvest; adverse environmental impact; competition between plants and so on. According to local experience: to prevent hollow celery, you can take the following “four strokes.” First, timely harvest mature harvest, the general should be harvested before bolting, open field cultivation in autumn should be in the frost