大白菜是一季生产半年供应的蔬菜,在蔬菜生产供应中占有重要位置。前几年由于主栽品种长期使用青杂中丰、山东4号等单一品种,播期沿用传统的“立秋”前后播种的习惯,施肥不合理,软腐病缺乏有效的防治方法,大白菜产量一直低而不稳,特别是遇到气 Chinese cabbage is a vegetable produced in the first half of a year and occupies an important position in the production and supply of vegetables. A few years ago, due to the long-term use of main cultivars Qingzhong Zhongfeng, Shandong No. 4 and other single varieties, sowing date followed the traditional “Liqiu” sown before and after the habit of unreasonable fertilization, lack of effective control of soft rot, cabbage production Has been low and unstable, especially in the face of gas