国兰对环境和空气的要求通风可以促进兰花的呼吸作用。不断供给兰花新鲜、干净的空气,可以促进光合作用的进行,增加养分的制造。同时,换除有害、闷热的空气,还可调节兰室、荫棚的温度与湿度,保持凉爽的环境,有利于兰花生长。而且,通风可以免除或防止病虫害的发生,大多数的病害都是因通风不良而导致的。但 Guolan requirements of the environment and the air ventilation can promote orchid breathing. Continuous supply of orchids fresh, clean air, can promote the conduct of photosynthesis, increase nutrient production. At the same time, the removal of harmful, hot air, but also regulate the blue room, shade the temperature and humidity, to maintain a cool environment conducive to the growth of orchids. Moreover, ventilation can eliminate or prevent the occurrence of pests and diseases, most of the diseases are caused by poor ventilation. but