Summer solstice, high temperature, vegetable management

After the summer solstice, it enters the sky, the temperature is high, and the light is enough. It is the longest solar energy in the day. In the flood season, the rainwater increased; various crops grew vigorously, weeds and pests proliferated rapidly, and field management needed to be strengthened, and timely harvesting was required. Seeding and seedling cultivation of autumn crops has also begun.

Facility vegetables need to be carefully managed

Tomatoes, cucumbers, eggplants and other vegetables grown in greenhouses and greenhouses have reached the peak of fruit harvesting. The plants grow rapidly, the transpiration is large, the water demand is high, and the management is good and the quality and quality are related.

â– Adjust the appropriate growth environment

Temperature Adjusts the temperature of the greenhouse for suitable crop growth based on different crop and weather conditions. Warm crops such as tomatoes are sunny from daylight to 23°C-30°C at 2 pm, 2° pm to sunset at 26°C-23°C, nighttime 18°C-20°C; celery and other leafy vegetables during the day are 20 °C-25 °C, nighttime is 10 °C-12 °C. The daytime temperature on cloudy days should be reduced by 3 °C - 5 °C. Avoid the temperature of the greenhouse is too high or too low, especially to maintain the temperature difference between day and night of 10 ° C -13 ° C.

Air humidity For the same fruits and vegetables, the air humidity requirements are different. Capsicum enjoys a humid environment. In the sunny day, it should be sprayed with water or micro-spray spray to increase the air humidity. Tomato and eggplant prefer a dry growing environment with a suitable humidity of 45%-60%. Reduce air humidity by means of ventilation and moisture reduction, reducing watering, etc., to ensure the normal growth of crops and prevent the spread of pests and diseases.

Light On sunny days at noon, the light is too strong, which will adversely affect crops, reduce yield and quality, and cause physiological diseases such as bud and sunburn. On sunny days, from 11 am to 3 pm, cover the shading net with a shading rate of 60%-70% on the roof, or spray the “Liliang” cooling material to shading and reduce the temperature inside the shed.

â–  timely harvest

Late harvesting 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 other time harvest.

â–  Timely plant consolidation promotes multiple results

Leaf removal Removes the old leaves, yellow leaves, diseased leaves and side branches of 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 ear of the predetermined ear, the result is 4-6 ears per plant, and 2-3 leaves are left on the top of the upper ear to remove the top.

â–  Thinning

Excessive flowers and fruits on tomato and pepper plants are removed early, and the deformed fruit and the oversized and undersized fruits on each ear are removed early to achieve a fruit shape, a uniform fruit, and a high commodity rate. .

â– Scientific watering and fertilizing

Scientific watering should be based on weather, crop growth and soil moisture. It is better to pour water in small water. Tomato and eggplant are usually watered once every 5-8 days; cucumber and pepper are watered once every 3 days to avoid excessive drought and excessive watering. Generally, the topdressing is stopped 30 days before the pulling, and the foliar spray fertilizer can be used to quickly supplement the nutrition.

Open field autumn crops suitable for sowing

At this time, the wheat has been harvested, and it is suitable for sowing vegetables in summer and autumn. The summer and autumn cucumbers are most suitable for sowing from June 25 to July 3. The autumn peas and kidney beans should be sown in late June; melon and eggplant are in Planted in late June, after 2 months of planting, it can enter the harvesting period to make up for the autumn season of August-September. Heat-resistant leafy vegetables such as spinach, coriander, leeks, auricula, and spinach should be sown in batches and harvested one after another to supply the summer off-season market.

Open field autumn crops

The celery planted in the autumn greenhouse and the autumn stalks and the cabbage, cauliflower and other crops planted in the autumn field are cultivated before and after the summer solstice. Generally, the greenhouse or the small arch shed is used for seedling cultivation, and the celery seeds must be germinated after low temperature. Sowing, you can soak seeds for 24 hours and put them into the 50 cm place on the surface of the well to germination; do the shade and rain protection of the nursery shed.

Open field spring vegetables are harvested in time

Tomatoes, eggplants, cucumbers, peppers, peas, cowpeas, radishes, cauliflower and other crops enter the middle and late harvesting seasons, and they should be harvested in the early morning on a sunny day. It is also necessary to do watering work according to the weather, soil and plant growth; timely pruning and smashing, remove the old leaves, so that the field is ventilated and light, and the disease is reduced.

Pest Control

Do a good job in the prevention and control of cucumber downy mildew, eggplant yellow wilt, tomato late blight and other insect pests such as cabbage blue moth, cotton bollworm, tobacco budworm and aphid. It is preferred to use insect traps, insect nets and yellow plates to reduce the density of the insect population. When it occurs, biological pesticides or low-toxic and low-residue pesticides are used for prevention and control, and strict compliance with the regulations for safe interval collection after application is strictly observed.

Grasp the planting green onions

In the autumn of last year, or in the greenhouse in February this year, in the greenhouse, the early-ripening vegetables such as wheat or spring broccoli, cauliflower and other vegetables are harvested and planted, and the roots are tied before the stagnation to ensure that the nectar is grown before the frost falls. It is necessary to apply the fermented organic fertilizer, deep-cultivate the land, and choose to grow robust seedlings, which are consistent in depth and depth, and timely plant the water.

Clear the drainage ditch early, do a good job in greenhouse rain protection

Before the arrival of the rainy season, the drainage ditch in the field will be dug, and the blockage will be cleared early to ensure that there is no water or water in the field after the rain. Inspect and repair the leaking parts such as greenhouse walls and roofs to prevent the rainy season from collapsing; check the storage conditions of grasshoppers, insulation, etc. to ensure that losses are not caused by water leakage.

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