大棚内的温度、湿度、光照等生态环境与外界明显不同,但其变化又随外界的变化而改变,大棚内的温度和湿度存在着明显的季节差异与日变化差异,大棚内的环境即有利于蔬菜的生长,又容易导致病害的发生,因此,必须根据蔬菜生长发育对环境的要求,进行合理、灵活的调节和控制,即满足蔬菜生长发育的需要,又要避免病害的发生。一、大棚内温度的管理。棚内气温随外界气 Greenhouse temperature, humidity, light and other ecological environment is obviously different from the outside world, but its changes with the changes in the outside world, the temperature and humidity inside the greenhouse there is a clear seasonal difference and diurnal variation, the environment inside the greenhouse that Which is conducive to the growth of vegetables, but also easily lead to the occurrence of diseases. Therefore, it is necessary to adjust and control the vegetables rationally and flexibly according to the requirements of the environment for the growth and development of vegetables, that is, to meet the needs of vegetable growth and development while avoiding the occurrence of diseases. First, the greenhouse temperature management. Shed temperature with the outside world gas