Greenhouse ventilation management: Spring graded ventilation should pay more attention. Opened the studio in the morning one hour after the glass greenhouse, open the vent 3-5 cm put a small wind, the purpose is to shed moisture to escape, adding carbon dioxide shed for photosynthesis smoothly supplement raw materials. Etc. Pengwen rose to above 28 ℃ glass greenhouses offer, will gradually leaked mouth open, keeping the greenhouse temperature does not exceed 33 ℃ (for cucumber, gourd and other vegetables for thermophilic) either. The formation of greenhouse gases and toxic precautions: ethylene and chlorine if the quality of plastic sheeting or film is poor, or in the ground mulch residue, exposure to sunlight, high temperatures in the shed, volatile produce ethylene and chlorine and other harmful gases. When the concentration reaches a certain glass greenhouse construction, can turn yellow between the veins vegetables margin or glass greenhouse construction company, then white, whole plant dead serious. Often misdiagnosed as bacterial angular leaf spot, cucumber particularly serious harm. Glass greenhouses offer, St. Xin Agriculture (certified), Shaanxi glass greenhouses provided by Anyang City of St. Xin Agricultural Technology Services, LLC. Anyang City of St. Xin Agricultural Technology Services, LLC (www.aysxny.com) in Henan, the other leaders, over the years, the company is implementing the scientific management, innovation and development, the principle of honesty and trustworthiness, and satisfy customer needs. In St. Xin agricultural leadership with the staff warmly welcome all inquiries negotiations to create the holy Xin agriculture a better future.