Greenhouse vegetable production was originally dedicated equipment, along with the development of greenhouse production applications become increasingly widespread. Physiological disorders and their treatment measures for greenhouse cultivation: sunburn. The main symptoms, greenhouse construction, faded after the initial blade becomes milky, yellow dead last. Flower and fruit drop, fruit deformity. High temperatures, especially at night temperature not only delay the first female inflorescence of tomato differentiation, but also affect the normal physiological function of stamens, the new greenhouse construction, not the normal pollination, causing shattering. Greenhouse with polymer - polyvinyl chloride, polyethylene production, the construction of plastic greenhouses, plastic film is widely used in agriculture. Greenhouse vegetable production was originally dedicated equipment, along with the development of greenhouse production applications become increasingly widespread. Greenhouse Seed Seed type: There are two main ways. Qiegua class stay in spring seed based, its methods are winter stubbles for Spring seed nursery → → autumn planting celery, cabbage and other.