Summer solstice high temperature vegetable management

After the summer solstice, it entered the sky, the temperature is high, and the light shines. It is the longest day of sunshine. In the flood season, there is an increase in rainwater; various crops are growing vigorously, and weeds and pests are rapidly growing. It is necessary to strengthen field management and timely harvesting. The cultivation of autumn crops has also begun.

Facilities for vegetables need fine management

Vegetables, tomatoes, cucumbers, eggplants and other vegetables grown in greenhouses and greenhouses have reached the peak of fruit harvesting. Plants grow rapidly, have large evapotranspiration, require more water, and management is related to yield and quality.

â–  Adjust suitable growth environment

The temperature regulates the temperature of the greenhouse suitable for crop growth according to different crops and weather conditions. Tomatoes and other thermophilic crops come out from the sun during the sunny day to 2 pm at 23 °C to 30 °C, from 2 pm to sunset at 26 °C to 23 °C, and at night at 18 °C to 20 °C; celery and other leafy vegetables are 20 during the day. °C -25 °C, night time is 10 °C -12 °C. The cloudy daytime temperature should be reduced by 3°C-5°C. Avoid over temperature or under temperature in the greenhouse. In particular, keep the temperature difference between day and night at 10°C-13°C.

Air humidity For fruits and vegetables that belong to the same thermophilic temperature, the air humidity requirements are also different. Hot and humid growing environment of pepper, in the sunny noon should be sprayed between the rows or install micro-spray spray to increase air humidity; tomato, eggplant hi dry growth environment, suitable humidity of 45% -60%. By means of ventilation and dehumidification, reducing the amount of watering and other measures to reduce the air humidity, both to ensure the normal growth of crops, but also to prevent the epidemic of diseases and insect pests.

If the sunshine is strong at noon on sunny days, it will have adverse effects on the crop, reduce the yield and quality, and cause physiological diseases such as buds and sunburn. In sunny days from 11 am to 3 pm, shade roofs covered with 60%-70% of the shading rate, or "Liliang" cooling materials are used to shave and lower the temperature inside the shelter.

â–  timely harvest

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 at other times.

â–  Timely plant consolidation promotes multiple results

Remove the old leaves, yellow leaves, diseased leaves and lateral branches in the lower part of the plant, so as to facilitate ventilation and lightening and reduce nutrient consumption. In general, tomato and cucumber maintain 12-16 functional leaves per plant; eggplant and pepper maintain 30-40 functional leaves per plant.

When the tip of a pointed tomato grows to the ear of a predetermined ear, the result is usually 4-6 spikes per plant, leaving 2-3 leaves above the upper ear to remove the top.

â–  Thinning fruit

Excessive flowers and fruits on tomatoes and pepper plants should be removed as soon as possible, and the fruit of abnormal shape and each ear should be discarded as early as possible to achieve fruit shape, uniform fruit, and high commodity rate. .

â–  Scientific watering and fertilizing

Scientific watering should be based on the weather, crop conditions and soil moisture. The method of watering with a small amount of water is better. 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. Generally, top dressing is stopped 30 days before pulling, and foliar spray can be used to quickly supplement nutrition.

Explosive autumn crops suitable for sowing

At this point, the wheat has been harvested. It is suitable for sowing of vegetables in summer and autumn. Summer, autumn and winter cucumbers are most suitable for planting from June 25th to July 3rd. Autumn beans and cowpeas must also be sown in late June. Winter melon and eggplant are Planting in the late June, after 2 months of planting, can enter the harvest period to make up for the autumn season from August to September. Spinach, parsley, leeks, mushrooms, spinach and other heat-resistant leaf vegetables to be sowed in batches, one after another harvest, supply summer off-season market.

Explosive autumn crops

The celery planted in the autumn greenhouses and autumn dew and the crops such as cabbage and cauliflower planted in the autumn solstice are raised before and after the summer solstice. Usually, greenhouses or small sheds are used for breeding, and the sorghum is made to prevent rain. The celery seeds must be germinated after low temperature. Sowing, can be soaked for 24 hours into the water on the surface of the well 50 cm place germination; good nursery shed shady rain.

Fresh spring vegetables harvested in real time

Tomato, eggplant, cucumber, pepper, rack beans, cowpea, radish, cauliflower and other crops into the middle and late harvest, to select sunny early morning harvest. It is also necessary to do watering work according to the weather, soil, and plant growth; timely pruning and pruning, remove the old leaves, make the field air and light transmission, reduce the occurrence of diseases.

Pest Control

The prevention and control of pests such as cucumber downy mildew, eggplant yellow wilt, tomato late blight, and cabbage beetles, cotton bollworms, tobacco budworms, aphids, etc. Priority should be given to the use of insect traps, insect nets and yellow plates to reduce the density of insect populations. Bio-pesticides or low-toxicity, low-residue pesticides should be used for prevention and control, and strict compliance with the provisions for safe interval harvesting after application should be adopted.

Scratching planting green onions

The onion harvested in the autumn of last year or in the greenhouse in February of this year was planted after the harvest of early mature vegetables such as wheat or spring cabbage, cauliflower, etc. To make full use of organic fertilizer, deep plowing the land, choose to grow strong onion seedlings planting, the same depth, timely pouring enough water.

Clearing Drainage Drainage as soon as Possible to Prevent Rainfall in Greenhouses

Before the rainy season arrives, dig up the field drains and clear the drains as soon as possible to ensure that there is no accumulation of water or water in the fields after rainfall. Check and repair leaks on greenhouse walls, roofs, etc. to prevent the rainy season from collapsing; Check grasshoppers, insulation, etc. to ensure that no leakage is caused.

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