1. Sowing and raising seedlings

Autumn cucumbers can be grown and transplanted, or they can be broadcast live. The sowing period must be selected appropriately. The early seedling period will be hot and rainy, and the disease will be serious; if it is too late to grow, the temperature will be difficult in the later period. Guaranteed, resulting in reduced output. Generally, sowing can be done from early August to early September in northern areas, and sowing can be delayed for about a month in southern areas.

2. Planting density

Cucumbers should be planted sparsely after autumn in greenhouses. The planting density should be determined according to the variety and soil fertility. Generally, 400 plants per mu are suitable.

3. Water management

Watering should be controlled at both ends and in the middle, that is, before the melon-bearing period, the main method is to cultivate and maintain moisture to increase the ground temperature, so as to achieve moisture and dryness; during the melon-bearing period, Water once every 8-10 days. Each watering should be done before picking the melons to control excessive growth. Watering should be controlled after the top melons are harvested to promote the formation of new roots. Water the melons in time when they swell. In the later period, when the temperature decreases, the growth of cucumbers slows down, and the requirements for fertilizer and water decrease. In order to reduce the temperature in the shed, watering should be strictly controlled, usually once every 10-15 days.

4. Nutrient management

The vegetative growth and reproductive growth of autumn cucumbers are carried out at the same time. The time is short, the growth is fast, and the amount of fertilizer is large. Fertilization should be based on "enough base fertilizer, light seedling fertilizer, According to the principle of "eating less, more meals, and using decomposed fertilizers", the general base fertilizer should be about 1,500 kilograms of human excrement, 50 kilograms of compound fertilizer, or 50 kilograms of compound fertilizer plus 25 kilograms of ammonium bicarbonate. After planting in the seedling stage, use 1:10 human excrement as fertilizer for the seedlings. Topdress again at intervals of one week, and insert trellises and tie vines. After entering the fruiting period, increase the proportion of top dressing. If possible, you can top-dress the melons once every time. If it rains, you can spread 5 to 7.5 kilograms of urea per acre. After entering the fruiting period, you can use 0.3% potassium dihydrogen phosphate (spraying is recommended). Liguo International Propolis Potassium Dihydrogen, one use is equivalent to three times of use of potassium dihydrogen phosphate) plus 0.3% urea for top dressing outside the roots.

5. Temperature management

The temperature should be properly controlled, 20-25℃ during the day and 12-16℃ at night, to prevent excessive growth. During the fruiting period, the temperature should be appropriately controlled at 25-30°C during the day and 16-18°C at night. Keep the temperature at night around 17 degrees to reduce respiration and increase dry matter accumulation. In the later period, the temperature drops sharply. Management should focus on preventing cold and heat preservation. At the same time, attention should be paid to ventilation to prevent the temperature from being too high and the spread of diseases. When the night temperature is lower than 13 degrees, pay attention to closing the greenhouse for heat preservation.

6. Humidity management

The suitable air humidity for the growth and development of cucumbers is 60%-80%. When the humidity in the shed exceeds 85%, it should be ventilated and dehumidified immediately; in the evening, when the temperature is 13-15 degrees, ventilate for 1-2 hours to reduce the temperature and humidity at night, prevent wild growth, control diseases, and promote flowering and fruiting at night.

7. Set up and tie the vines in time

When the cucumber seedlings grow to 7 to 8 leaves, the plants are already 20 to 25 cm high, and they must be installed in time. The brackets should be When inserting a fence into a flower stand, each bamboo pole should be interlaced with at least 4 bamboo poles to help shade the melon vines. Cucumber plants grow faster in summer and autumn, so the vines should be tied in time. Generally, the lower side vines are not left, but a few more leaves on the middle and upper side vines can be left as appropriate before topping. Remove old and diseased lower leaves in a timely manner. In addition, there is a lot of watering in summer and autumn, which is prone to weeds, so we should pay attention to timely removal.

8. Coordinate the growth of melon seedlings

The growth period of autumn shed cucumbers is short, and the melon-bearing period is only more than 40 days. Therefore, in the early stage, the main purpose is to promote seedlings, cultivate strong seedlings, and differentiate more flower buds. In the early stage of melon formation, the main vines are the main ones that produce melons. Remove more than 12 side branches. It is appropriate to leave 3 to 4 side branches behind the waist melon. Leave one melon and one leaf on each side branch to top off the melons, so as to achieve the effect of the main side branches forming melons at the same time. In the late stage of melon formation, it is appropriate to remove old and diseased leaves at the bottom to reduce nutrient consumption and ensure the growth needs of the melon strips.

9. Pest and disease control

The main common diseases of cucumbers in autumn greenhouses are downy mildew and blight. In addition to aphids and yellow mites, insect pests such as leafminers and cabbage caterpillars have also been on the rise in recent years, so prevention should still be the priority.