While the production of large cucumbers, initially complementary to spring cucumbers, was not very high, the increase in market demand in the south of the north, the increase in earnings and even the increase in revenues over spring cucumbers, has become an important part of the supply of northern cucumbers for the anniversary. The environmental conditions experienced by the autumn cucumbers are quite the opposite of those experienced by the winter cucumbers, where the period of seedlings is a high-temperature season, with the later stages of growth moving into a low-temperature period and the light becoming weaker. During this period, high temperatures and high light, combined with severe pests such as pyroclastic lice, white lice and tectonic flies, are not suitable for normal cucumber growth and production should be carried out in conjunction with assistive facilities such as sunnets and pest nets. Details are as follows:
I. Selection of varieties
Autumn delayed cultivation, high pre-temperature and low post-temperature should be selected for heat-resilient, low-temperature, disease-resistant, productive and more commercial varieties。
Ii. Cultivation
2. 1 determination of seeding period
The late fall and late cucumber dosage was produced to take full advantage of the idle period in the early spring of july to october, requiring harvests to begin around the end of august and early september and to continue till early october. The normal broadcasting period should be in mid-july。
2. 2 precubation
A cold bed system is used in the sheds to breed, and the seeds that are to be sprouted are no longer scattered in nutrients or dens. In order to select the areas where the winter sheds are more lumber-rich, cucumber-growing after autumn should focus on the cultivation of saplings and anti-humans. One-and-a-half ethylene can be sprayed at concentrations of 100-200 ppm for an increase in the number of females at the time of the 1-2 real leaf。
Iii. Planting
3. 1 pre-plant treatment
When the front crop is collected, the field is cleaned, the front extremities removed and the weeds grown. Owing to high temperatures, maximum ventilation, convection and cooling should be achieved. The roof of the shed is covered with a wide pore-covered sunnet during the weather, and all windways and imports are covered with an anti-worm net of approximately 30 minutes ' duration three days before planting, fumigating for 12 hours per acre with a centimetre of bacillus smoker. It is then open to all vents and ventilated exits and is ready for planting in 2-3 days。
3. 2 fertilisers
Acres are applied with a high-quality ring fatter than 5000 kg (better with rotting chicken dung) and highly effective compound fattening of 50 kg. Owing to late-temperature temperatures, cucumbers should be planted later in the autumn at a density of about 3,500 per acre。
Iv. Post-plant management
4. 1 environmental regulation
Remove the front-of-house nematode and replace it with an anti-worm net, and keep it ventilated day and night, so that the cucumber can produce more and better quality. The front stage covered the sun-shield network for cooling purposes. It would be preferable to use a 60 per cent sunscreen net to cover up high-temperature periods between 9 a. M. And 4 p. M. In the middle of a sunny day to prevent direct light. When the light is weak by 9 a. M. On a rainy or sunny day, and after 4 p. M., the sunnets are rolled up, both to prevent high temperatures and to allow cucumbers to see plenty of sunlight. During the most cucumber-bearing period (mid-september to early october in the north), ventilation should be increased during the day, with the temperature adjusted to 25-30°c and 15-18°c at night, keeping the vents open at or above 15°c. Temperature management at this stage should take into account both day-to-day ventilation and reduced air humidity and night-to-night cooling. After a low temperature period (after october), when temperatures have declined sharply, the temperature in the sheds has been adjusted mainly to prevent the cold from remaining warm, but care should also be taken to provide adequate ventilation, otherwise high wetness in the sheds can cause the spread of disease。
4. 2 fertilizer water management
(1) hydraulic management: cucumber root is well developed, humid, and requires a high amount of water, and it is appropriate to control the relative humidity of the soil at around 90 per cent during periods of high-temperature drought. In the event of drought, water must be poured in time. In addition, the water supply must be uniform - or coarse. In the event of drought, although it does not result in the death of the plant, the plant is small, deformed and deformed, especially during the hot and dry season. The high temperature of water should take place in the morning or at night at noon. This is particularly so that the fruit is deformed and the fibres increase. Care is taken not to pour more water to keep the temperature warm。
(2) fertilizer tracking: cucumbers are easily grown in the autumn and should be avoided with nitrogen fertilizer during the pre-growth period, and they should be increased during flowering. The second fertilization takes place after the first female flower of the cucumber, with approximately 20 kg of compound fat or 10 kg of conservative acid per acre, and the cucumber is re-fertilized once after flowering. Fertilizer recovery takes place after the harvest period, usually at 2 ~ 3 times per harvest - once, with three elements of compound fertilizer at 25 ~ 40 kg per acre. In order to extend the melon period and increase production, leaf spray can be carried out with 0. 1% ~ 0. 2% potassium phosphate per acre and every 3-5 days。
4. 3 plant adjustment
When cucumbers fall into chickens in the later stages of their growth, the exposure of the chicken to the ground can cause disease and even the death of the chicken tree, affecting the production of cucumbers. This problem can be prevented by the “nicking” method, whereby the cucumber dragons are drawn repeatedly from the north to the south, leaving the cucumber chickens in the middle of the air and without contact with the ground, thereby reducing the plant, extending the outcome period and not killing the chickens. Leaves should be removed in conjunction with chickens in order to reduce bacterial infestation and enhance the permeability of the shed. The removal of leaves must not be excessive, so as not to result in an inadequate supply of photocolumn products, affecting the production and quality of cucumbers. During the period of normal cucumber cumber, the principle of leaf extraction is to ensure that at least 15 functional leaves are retained per plant。
Collection and pest control
High summer autumn temperatures, fast-growing plants and fast-growing fruit are generally harvested 50 to 60 days after planting. Early harvests should be carried out in order to avoid a fall, usually in the middle of the day and during the guacamole period in order to ensure that the guacamole is fresh and flourishing. Qucumber pest control。
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