Adjust the appropriate temperature and light. Temperature management indicators are recommended to be maintained at 25~30°C during the day and 15~18°C during the night. Before mid-September, the outside temperature was still high and the light was strong. At this time, the temperature and light management was mainly based on sunshade. It is recommended that the greenhouse, shed top wind and waist vents all open during the day, and ventilate day and night to reduce the temperature and humidity in the shed; in sunny weather conditions, the conditional plots are recommended to cover the mobile shade nets to cool down from 11:00 am to 3:00 pm.
Strengthen plant management. Timely removal of crop side branches, old leaves and diseased leaves, increase ventilation and light transmission, reduce the temperature inside the shed, and also play a role in improving nutrient accumulation, reducing mechanical damage to crops and controlling diseases. Generally, tomato and cucumber maintain about 16 leaves, eggplant keeps 35~40 leaves, and pepper is guaranteed at 40 pieces.
Scientific water and fertilizer management. In the management of water and fertilizer, the greenhouse fruits and vegetables still have to adhere to the principle of “small number of timesâ€. According to the fertilizer characteristics of crops, they should be topdressed in time during the fruit expansion period. It is recommended to use drip irrigation method. Before the end of September, watering and topdressing should be carried out every 5~7 days, each time watering 6~10 square meters/mu, each time combined with drip irrigation and fertilizer 3~5 kg/mu. After planting the fruit vegetables in the solar greenhouse, drip irrigation once in a timely manner, generally 15~20 square meters per mu; in the seedling stage and flowering period, each drip irrigation 1~2 times, each irrigation water 6~10 squares/mu, each time combined with drip irrigation and fertilizer 3~4 kg/mu; drip irrigation once every 4~8 days after fruit (guar), each irrigation 5~10 square/mu, each combination of drip irrigation and fertilizer 3~5 kg/mu.
Do a good job in pest control. In the prevention and control of pests and diseases, it is necessary to implement the "preservation-based, comprehensive prevention" plant protection policy, pay attention to diligent observation, early detection, and timely prevention and control when spotting occurs. Before mid-September, attention should be paid to the prevention and control of diseases such as whitefly, sassafras, aphids and other diseases such as viral diseases, verticillium wilt, downy mildew and powdery mildew. After entering October, due to the gradual reduction of ventilation, the humidity in the shed increases, and low temperature and high humidity easily lead to diseases such as gray mold and downy mildew. At the same time, due to the decrease of external temperature, the temperature of aphids and white mites is easier to reach the shed. High-level migration, so this stage should focus on strengthening the application of smoker drugs and insect-proof nets, and should carefully check the insect-proof nets to find loopholes and remedies.
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