The formation of greenhouse gases and toxic precautions: nitrous gases ammonium nitrogen fertilizer applied too much time, will reduce the role of certain bacterial film greenhouses project, causing localized soil acidity. When the PH value is less than 5, the film will produce greenhouse gas nitrous, leaf vegetables can appear white spots, white whole leaf dead serious, often misdiagnosed as powdery mildew, sensitive to nitrous gas vegetables are eggplant, cucumber, zucchini , celery and pepper. The formation of greenhouse gases and toxic precautions: winter heating temperature, if incomplete combustion of fuel will produce toxic gases film greenhouses construction price, ventilation is not timely make excessive accumulation of carbon dioxide. Vegetable production. Precautions: ventilation. Film greenhouses built in Qingnuan weather, should be combined to adjust the temperature for ventilation, rain and snow should also be appropriate for ventilation. Choice of safe non-toxic plastic sheeting and plastic film, the timely removal of waste plastic materials and residues shed. Film greenhouses Film greenhouses built Wuhan _ _ Communications Technology provided by Anyang City Communications Technology Limited. Anyang City Communications Technology Co., Ltd. (www.aytlkj.com) strong, credible, in Anyang, Henan agricultural supplies industry has accumulated a large number of loyal customers. The company better work attitude and continuous improvement of innovative ideas and Communications Technology will lead you into the brilliant work together for a better future!