在冬春季蔬菜育苗过程中,由地低温,寒冷,连续阴天等气候的影响,使冬春茬育苗常常发生病害,特别是番茄、辣椒、黄瓜等果菜类较为严重,发病死苗的主要原因一是冬季天气寒冷,地温低,室内湿度大,大多数苗床未经消毒,导致摔倒病、沤根、立枯病的发生;二是管理粗放,遭受寒流的袭击,使苗床出现0℃以下的低温,幼苗发生冻害而死;三是通风透光不足,抗寒能力差,天气骤晴后幼苗适应不了温湿度的变化而死。鉴于以上几种原因,苗床管理应注意以下几个方面: In winter and spring vegetable nursery process, the cold, cold, continuous cloudy and other climate effects, so that winter and spring crop nursery often disease, especially tomatoes, peppers, cucumbers and other fruits and vegetables are more serious, the main cause of morbidity and mortality First, the cold weather in winter, low ground temperature, indoor humidity, most of the seedbed without disinfection, leading to fall sick, root, blight; Second, the extensive management, the cold attack, the seedbed appears below 0 ℃ Of the cold, seedlings freeze damage and death; Third, lack of ventilation and light, poor cold resistance, sunny weather after the seedlings can not adapt to changes in temperature and humidity and death. In view of the above reasons, seedbed management should pay attention to the following aspects: