temperature control. The suitable temperature for photosynthesis of greenhouse vegetable is from 20 °C to 30 °C. In the early growth period (early flowering period and early fruit period), the required temperature is lower, and the temperature in the later period (fruit period) is slightly higher. The temperature in the nighttime greenhouse is kept at 15°C to 20°C. Therefore, when the temperature rises, pay attention to timely ventilation and cooling.

Reduce humidity. As temperatures rise, greenhouse vegetables gradually enter a period of rapid growth. At this time, it is required that the soil moisture is sufficient, but the air humidity in the greenhouse should not be too high, otherwise it can easily breed diseases. Therefore, we must strengthen ventilation, reduce humidity, and avoid flooding.

Appropriate top dressing. The topdressing amount is determined according to the growing trend. It is recommended to apply some biological fertilizers such as seaweed bio-water fertilization, wadilong wolfberry protein and other biological fertilizers to avoid deep-plowing masterbatch application, and pay attention to ventilation.

Prevent pests. The diseases and pests of vegetables in spring greenhouses mainly include leaf disease of Solanaceae. The main insect pests are tea plant, aphids and so on. Prevention of leaf mold mainly through the method of ventilation and humidity, rain and sunshine can not be sprayed liquid, available Pythium chlorothalonil aerosol. The control of aphids can use isoprocarb to exterminate smoke. Prevention of tea-tea seedlings should be sprayed with Keziate or chronosterone on sunny days, and the liquid medicine is mainly sprayed on the front and back sides of tender leaves and tender stems.

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