1978年呼市郊区巧报公社在塑料大棚蔬菜中用煤热风炉加温,取得了早上市、增加产量的效果,因为煤热风炉起了两大作用:(1)御寒,防止低温为害;(2)补温,补充蔬菜正常生长所需的热量。但是,烧煤的炉体体积大、份量重,以活动立式热风炉为例,全重达250公斤,若钢板稍厚可达300公 In 1978, the outskirts of Hohhot, a clever commune in the plastic greenhouses, vegetables, hot stove with coal heating, made the morning to increase output effect, because the coal stove plays a two roles: (1) warm, to prevent low temperature damage; ( 2) heat, supplement the normal growth of vegetables required heat. However, the furnace of coal burning large volume, heavy weight to vertical hot stove activities, for example, the total weight of 250 kg, if the plate slightly thicker up to 300 km