Tomatoes, cucumbers, eggplants and other vegetables grown in the greenhouse have reached the peak of fruit harvest. The plants grow rapidly, the transpiration is large, and the water demand is large. The quality of the management is related to the yield and quality.
1. Adjust the suitable growth environment
temperature. Tomatoes and other thermophilic crops come out from the sun at 2 pm to 23 degrees Celsius to 30 degrees Celsius in the daytime, from 2 pm to sunset from 23 degrees Celsius to 26 degrees Celsius, at night from 18 degrees Celsius to 20 degrees Celsius; leafy vegetables such as celery during the day 20 degrees Celsius to 25 degrees Celsius, 10 degrees Celsius to 12 degrees Celsius at night. The daytime temperature on cloudy days should be reduced by 3 degrees Celsius to 5 degrees Celsius. The temperature difference between day and night must be maintained between 10°C and 13°C.
Air humidity. Peppers prefer a humid growth environment. At noon on a sunny day, spray water or install micro-spray spray to increase the air humidity. Tomatoes and eggplants prefer a dry growth environment with a suitable humidity of 45% to 60%. Reducing air humidity through ventilation and dehumidification, reducing the amount of watering, etc., not only ensures the normal growth of crops, but also prevents the spread of pests and diseases.
illumination. Excessive sunlight at noon on sunny days will adversely affect crops, reduce yield and quality, and also cause physiological diseases such as sprouting and sunburn. On a sunny day, from 11 am to 3 pm, cover the roof with a shading net with a shading rate of 60% to 70%, or spray "Liliang" to reduce the temperature in the shed.
2. Timely harvest
Late harvest not only affects the growth of fruits and plants, but also reduces the quality. Try to harvest in the early morning on a sunny day, because the quality and taste of the product are better than other times.
3. Organize plants in time
Beat the leaves. Remove old leaves, yellow leaves, diseased leaves and side branches in the lower part of the plant to facilitate ventilation and light transmission and reduce nutrient consumption. Generally, tomato and cucumber plants maintain 12 to 16 functional leaves; eggplant and pepper plants maintain 30 to 40 functional leaves.
Pinch the tip in time. When the tomato grows to the ear of the ear, it usually picks up the tip. Generally, each plant bears 4~6 ears. Leave 2~3 leaves on the top of the top ear and remove the top.
4. Fruit thinning
Remove too many flowers and fruits on tomato and pepper plants as soon as possible, and remove abnormally large fruits and oversized and small fruits on each ear as soon as possible to achieve the effect of regular fruit shape, uniform fruit and high commercial rate .
5. Scientific watering and fertilization
Scientific watering should be carried out according to the weather, crop conditions and soil moisture. It is better to dip in small water. Tomatoes and eggplants are usually watered once every 5-8 days; cucumbers and peppers are watered once every 3 days to avoid excessive drought and excessive watering at one time. Generally, top dressing is stopped 30 days before pulling seedlings, and foliar spraying can be used to quickly supplement nutrition.
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