塑料大棚蔬菜气害发生及预防措施于波，薛勇，李洪波（黑在江省佳木斯农业学校）塑料大棚蔬菜生产中，随着外界气温的逐渐下降，通风时间减少，这时常易发生氨、二氧化氮等有毒气体的危害。据测定，大棚中氨的浓度超过５ｐｐｍ，二氧化氮的浓度超过２ｐｐｍ时就会导致蔬菜... Plastic greenhouse vegetable gas hazards and preventive measures Yu Bo, Xue Yong, Li Hongbo (Jiamusi Agricultural School in Jiangxi Province) plastic greenhouses vegetable production, with the gradual decline in outside temperature, reduce ventilation time, this time prone to ammonia, two oxidation Nitrogen and other toxic gas hazards. It is determined that the concentration of ammonia in the greenhouse more than 5ppm, nitrogen dioxide concentration of more than 2ppm will lead to vegetables ...