几年来我们进行了春淡季结球大白菜优质高产的试验示范,取得了较好的经济效益,使亩产量稳定在6000～7000千克,产值达2000～3000元。采取的主要措施是: 1.选择耐苔性强,结球早的良种,如辽白四号、丰抗70、小杂56等杂交一代种。因这些杂交种对低温反应比较迟钝,只要改进栽培中的主要环节,加强肥水管理,即可形成叶球,每亩用种量为0.3千克。 2.选择适宜的播种期。我省海拔1600～1900米地区,适宜的播期一般是3月8～28 Over the past few years we conducted a trial of good quality and high yield of Chinese cabbage in Spring and Autumn, and achieved good economic benefits, so that the output of mu was stable at 6000-7000 kg and the output value reached 2000-3000 yuan. The main measures taken are as follows: 1. Choose the elite varieties with strong moss resistance and early aspiration, such as Liaobai IV, Fengkang 70, Xiaozhan 56 and other hybrids. Because of these hybrids more sluggish response to low temperature, as long as the main part of the cultivation to improve and strengthen fertilizer and water management, you can form a leaf ball, the amount of 0.3 acres per mu. 2. Select the appropriate sowing period. The province of 1600 ~ 1900 meters above sea level, the appropriate sowing time is March 8 ~ 28