芹菜含有丰富的胡萝卜素,维生素B2及挥发性芳香油气味,是广大群众喜爱的主要蔬菜之一。夏季种植芹菜,一般在6月中旬育苗,7月下旬移栽,9月下旬开始上市。因芹菜为耐寒性蔬菜,要求环境冷凉湿润,忌炎热,最适温度为15～20℃。因此,高温期育苗必须采用遮阳网覆盖栽培,低温催芽等相关措施,以达到改善局部小气候的目的, Celery is rich in carotene, vitamin B2 and volatile aromatic oil smell, is the majority of the people loved the main vegetables. Celery summer planting, usually in mid-June nursery, transplanting in late July, started listing in late September. Due to celery cold-resistant vegetables, requiring cool and humid environment, avoid hot, the optimum temperature is 15 ~ 20 ℃. Therefore, high temperature seedling must be covered with shade net cultivation, germination and other related measures at low temperature in order to achieve the purpose of improving the local microclimate,