大白菜种子普遍采用小株采种的方式。在山东省大部分地区一般于12月中旬至第2年1月中旬在阳畦或小拱棚内播种,2月底至3月上旬开始定植。播种时,地温已开始下降,由于温度低,再遇天气不好,造成出苗率较低。 Cabbage seeds commonly used small seed collection methods. In most areas of Shandong Province, planting is generally carried out in the Yangliu or Sachet from mid-December to mid-January of January and from the end of February to early March. When sowing, ground temperature has begun to decline, due to low temperature, and then bad weather, resulting in lower emergence rate.