春末夏初是华北蔬菜缺少的季节,为了早日供应市场,农民创造了许多提早甘蓝成熟的栽培方法,如提前在头一年霜降至立冬节时播种,春季提早定植加设风障等,但当管理不当或播种过早使低温长期作用于成长的幼苗时,往往因通过了春化阶段而抽苔,并需要增加设备及人工,都影响到产品成本。 Late spring and early summer are the missing season for vegetables in North China. In order to supply the market as soon as possible, farmers have created many mature methods of early maturing cabbage. For example, planting in early frost season until winter, When improperly managed or prematurely sowing low temperature for growing seedlings, bolting often occurs through the vernalization stage and requires additional equipment and labor, all of which affect the cost of the product.