夏季栽培是指大白菜的播种期在立秋之前,发芽期、幼苗期处于炎热的夏季.这时的天气多变,或高温干旱,或阴雨连绵,给大白菜的生长发育造成不良的影响,如植株生长衰弱,抗逆性差,易感染多种病害,严重时导致减收甚至绝收.夏季还是蚜虫活动的高峰期,其危害大白菜形成伤口,是病毒侵染的主要渠道.实践证明,要想获得大白菜丰产、优质、高效益,必须采取下述关键技术措施. Summer cultivation refers to the Chinese cabbage sowing period before the autumn, germination, seedling in the hot summer when the weather is changing, or high temperature and drought, or rainy, to the growth and development of Chinese cabbage caused by adverse effects, such as Plant growth and weakness, poor resistance, susceptible to a variety of diseases, severe cases lead to the reduction or even income .In summer, or the peak of aphid activity, which endanger the formation of Chinese cabbage wounds, is the main channel of virus infection.Practice has proved that Access to Chinese cabbage yield, high quality, high efficiency, we must take the following key technical measures.