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(July 16th) officially entered the volt, and the unbearably hot dog days are here! Since the beginning of summer this year, many places across the country have been entrenched in high temperatures, and the "stove" mode has been on standby for a long time.

After entering Futian, the temperature is high and the light is sufficient, which is the solar term with the longest light time every day. At the same time, with the arrival of the flood season, the rain has increased, various crops have grown vigorously, and weeds and pests have grown and spread rapidly. It is necessary to strengthen field management and harvest in time. In addition, the sowing of autumn crops has also begun.

Facility vegetables need careful management

Tomatoes, cucumbers, eggplants and other vegetables grown in greenhouses and greenhouses have reached their peak fruit harvesting period. The plants grow rapidly, have a large amount of transpiration, and require a lot of water. The quality of management is related to yield and quality.

Adjust a suitable growing environment

Temperature: Adjust the greenhouse temperature suitable for crop growth according to different crops and weather conditions. Temperature-loving crops such as tomatoes are 23-30°C from the sun to 2:00 pm when it is sunny during the day, 26-23°C from 2:00 pm to sunset, and 18-20°C at night; leafy vegetables are 20-25°C during the day and 20-25°C at night. 10~12℃. The daytime temperature on cloudy days should decrease by 3~5℃. Avoid high or low temperature in the greenhouse, especially to maintain a temperature difference of 10~13℃ between day and night.

Air humidity: For melons, fruits and vegetables that belong to the same temperature, the air humidity requirements are also different. At noon on a sunny day, water should be sprayed between the rows or a micro-spray should be installed to increase the air humidity; tomatoes like a dry growing environment, and the suitable humidity is 45%-60%. The air humidity can be reduced by measures such as ventilation and dehumidification and reducing watering, which not only ensures the normal growth of crops, but also prevents the epidemic of diseases and insect pests.

illumination. Excessive sunlight at noon on a sunny day will adversely affect crops, reduce yield and quality, and cause physiological diseases such as bud wither and sunburn. From 11:00 am to 3:00 pm on sunny days, cover the roof with a shading net with a shading rate of 60%-70%, or spray cooling materials to shade and reduce the temperature in the shed.

Harvest in time

Harvesting too late not only affects fruit and plant growth, but also reduces quality. Try to harvest in the early morning on a sunny day, the quality and taste of the product are better than those harvested at other times.

Just-in-Time Plant Arrangement Promotes Multiple Results

Defoliation: Remove old leaves, yellow leaves, diseased leaves and lateral branches from the lower part of the plant to facilitate ventilation and light transmission and reduce nutrient consumption. Generally, tomato and cucumber maintain 12-16 functional leaves per plant; eggplant and pepper maintain 30-40 functional leaves per plant.

When the tomato grows to the predetermined ear, the tomato is punctured. Generally, each plant bears 4-6 ears, and 2-3 leaves are left on the top of the upper ear before picking the top.

fruit thinning

Remove too many flowers and fruits on tomato and pepper plants as soon as possible, and remove deformed fruits and fruits that are too large and too small on each ear, so as to achieve the effect of uniform fruit shape, uniform fruit and high commodity rate. .

Scientific watering and fertilizing

Scientific watering should be carried out according to the weather, crop growth and soil moisture. It is better to water frequently with small water. Tomatoes are generally watered once every 5 to 8 days; cucumbers are watered once every 3 days to avoid excessive drought and excessive watering at one time. Generally, the top dressing is stopped 30 days before the seedlings are pulled, and foliar spray fertilizer can be used to quickly supplement nutrition.