早春地膜覆盖大白菜反季节栽培 ,不仅为蔬菜市场增加花色品种 ,而且可使菜农获得很好的经济效益。这种栽培方法成本低 ,便于管理 ,一般亩产４０００公斤 ,亩产值４０００～５０００元。现将其栽培要点简介如下。１ 选择优良品种应选择耐低温 ,不易早期抽薹 ,抗病性强 ,结球速度 Early spring filming cabbage anti-season cultivation, not only for the vegetable market to increase color varieties, but also enable farmers to get very good economic returns. This cultivation method has low cost and is easy to manage. Generally, it produces 4,000 kg of mu per mu and its output value is 4,000 to 5,000 yuan per mu. The cultivation of the brief introduction is as follows. 1 Select good varieties should choose low temperature resistant, not easy to early bolting, disease resistance, ball speed