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随着我国人民生活水平的迅速提高,人们要求四季都能吃到新鲜蔬菜,因此,各地政府狠抓菜篮子工程。在我国北方,大力发展塑料大棚等温室,使北方居民在冬季也能吃到各种新鲜蔬菜。我国北方冬季寒冷,大棚内气温较低,当温度低于10℃时,作物便不能生长发育了,因此必须及时提高大棚内温度,以确保作物正常生长发育。北方的冬季,在白天或连续阴雨天也常常会使大棚内温度低于10℃,也必须及时增温。目前这种临时性增温,通常采用点燃木炭、电炉
With the rapid improvement of people’s living standards in our country, people are urged to eat fresh vegetables in all seasons. Therefore, governments at all levels pay close attention to food basket projects. In northern China, vigorously develop greenhouses such as plastic greenhouses so that northern residents can eat all kinds of fresh vegetables in winter. In northern China, the winter is cold and the temperature in the greenhouse is low. When the temperature is lower than 10 ℃, the crops can not grow and develop. Therefore, the temperature in the greenhouse must be raised in time to ensure the normal growth and development of crops. Winter in the north, during the day or continuous rainy days often make the greenhouse temperature is below 10 ℃, it must be timely warming. The current temporary warming, usually using charcoal, electric stove