大棚黄瓜放风新法山东省安丘县担山乡蔬菜生产服务公司在指导塑料大棚黄瓜生产中，针对传统放风的弊端，推出棚外预热放风新法。既能有效地调节棚内温、湿度，又能较快地补充二氧化碳促进光合作用。增产增效明显，技术可行。（一）原理：传统放风只能放顶风，尤其早春绝不... Greenhouse cucumber ventilation law Anqiu County, Shandong Province Tamshan Township vegetable production service company in guiding the production of cucumbers in plastic greenhouses, in view of the traditional drawbacks of the wind, the introduction of a new method of warm shed ventilation shed. Both can effectively regulate shed temperature, humidity, but also can quickly add carbon dioxide to promote photosynthesis. Significant increase production efficiency, technical feasibility. (A) Principle: The traditional wind can only put the wind, especially in early spring never ...