保护地二氧化碳气体变化规律与调控范开业，姚富国，林同学，周建全（山东省临沂市农业局经作站）深冬，早春在保护地内进行蔬菜的栽培．对供应淡季市场，丰富城乡“菜篮子”有着显著的经济效益和社会效益。但是此时外界气温低，为保温保护设施处于密闭状态，引起棚内二氧... Protected carbon dioxide gas regulation and regulatory Fan opened, Yao Fuguo, Lin students, Zhou Jianquan (Linyi City, Shandong Province Bureau of Agriculture by the Station) winter, early spring in the protected area for the cultivation of vegetables. On the supply of off-season market, rich urban and rural “basket” has a significant economic and social benefits. But at this time the outside temperature is low, for the protection of thermal insulation facilities in airtight condition, resulting in greenhouse oxygen ...