After the fall of the greenhouse, the cucumbers in the greenhouse are the cucumber production methods that continue to be produced in greenhouses in the cool autumn season. The early stage of the flood season is in the high temperature season, while the temperature in the later period is drastically reduced, and the environmental conditions are greatly different. The following technical points are mainly involved in cultivation and management:
1. Sow seedlings and nursery seedlings for transplanting seedlings in autumn greenhouses and live broadcasts. Zhongnong 12 and Zhongnong 16 can be used as varieties. Sowing period should be properly selected, and the early seedling period should be hot and rainy, and the disease should be severe. It is difficult to guarantee the temperature at the late stage of late growth, resulting in reduced yield. In general, the northern region can be sown from the end of July to August, and the southern region can be sown 30-40 days later. The cucumber seedlings are exposed to high temperature and long daylight conditions, which is not conducive to female flower differentiation. When the seedlings are 2-3 leaves, 100 ppm ethephon solution is sprayed.
2. Planting Density After the fall of greenhouses, cucumbers should be sparsely planted. Planting density should be based on species and fertility, generally 400 plants per acre is appropriate.
3, water management watering to control the middle to promote the middle, that is, before the melon period, to raise the soil to protect the soil to increase the main, do see wet see dry; fruit period every 7-10 days to pay a water, every watering Should be carried out before picking the cranberries to control the madness; control the watering after the top melons are harvested and promote new roots. When watering back, it will be watered in time. After the temperature is lowered, the growth of cucumber is slowed down and the requirements for fertilizer and water are reduced. In order to reduce the temperature in the shed, watering should be strictly controlled, and the watering should be done once every 10-15 days.
4. Nutrient management In the premise of ensuring the supply of soil nitrogen, appropriate application of phosphorus and potassium fertilizer. Basal fertilizer is generally combined with soil preparation and application of 5000 kg of farmyard fertilizer and 30-50 kg of compound fertilizer per mu. Top dressing is in liquid form, with water as fertilizer. General melon before the expansion of acres of topdressing 15-20 kg of urea, potassium sulfate 10 kg, 15 kg of diammonium phosphate, after each received two topdressing once fat. In the middle and late period, it is also possible to dilute the manure 2-3 times with water. When a large number of melons were sprayed, 0.3% potassium dihydrogen phosphate and 0.3% urea were sprayed on the foliar to increase the yield.
5, temperature management of cucumber production and development of the suitable temperature of 25 degrees -30 degrees, more than 30 degrees faster growth of plants, easy to grow crazy. Therefore, the temperature is higher in the early period, and attention should be paid to temperature control. The temperature of the greenhouse should be controlled at 25-30 degrees during the day and should not exceed 30 degrees. The night temperature should be maintained at about 18 degrees to reduce the respiration and increase dry matter accumulation. The temperature dropped sharply in the later period, and the management was mainly based on cold insulation. At the same time, attention was paid to ventilation and ventilation to prevent the temperature from being too high and the disease spread. The night temperature was lower than 13 degrees and the insulation of the closed greenhouse was taken care of.
6. When you see the vines and vines rise to about 30 centimeters, you begin to tie the vines. For the first time, when the vines grow vigorously, they can bend and abdomen, and the degree of bending and tightness depends on the growth of guaguan. If there is a small amount of melons, the degree of bending must be large and it must be tight.
7. The vegetative growth of the plants is controlled after the cucumbers are preserved. Therefore, it is necessary to try to make the first batch of flowers more sitting. If the first batch of flowers sitting less, easily lead to crazy. According to reports, the use of Paulownia dip flower, spray flowers, cucumbers can sit more, and can keep melons, promote rapid expansion of flowers. It can not only mention the morning market, increase early production, but also effectively prevent melons from going crazy. In addition, pollination by bees is also good.
8. The first step in harvesting is to look at melons and melons. Root melons have a significant impact on melons. When roots are harvested later, the growth of melons is limited. Crab larvae should be properly picked root melons in order to play the role of falling maggots, to ease the crazy growth, when the melon crickets grow weak, early harvest root melons to prevent falling pods, as soon as possible to take measures to promote growth. The harvesting period of autumn cucumber is in the period of favorable temperature and light conditions for the growth of cucumber, but the best environmental conditions for a short period of time, should take full advantage of this period of time to strengthen management, in order to increase the frequency of harvest and obtain high yield.
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