What is the planting technique of cucumber in greenhouse in spring?

First, seed selection: mainly hybrid cucumber varieties suitable for local cultivation, requiring low temperature tolerance, strong disease resistance, wide adaptability, early maturity, high yield and high quality.

2. Seedling raising: select full seeds, soak them in warm water of about 40 degrees for half an hour, then use 50% carbendazim and 50% thiophanate methyl 10 ml, add 2 kg of water, soak them for 20 minutes, take them out and wash them with clear water; Play it when it's dry. The seed yield per mu is 0. 1 kg, and the sowing date is 1,1from mid-late October to mid-February.

Choose the plot where melon crops have not been planted in recent years as the seedbed, level the bed soil, pour enough water, and sow after 24 hours. Sow 0.2 kg per square meter of bed surface and cover the soil with a thickness of 2 cm. Keep the soil moist in the early stage, generally spray small water once a week, but not too wet, and control the water in the later stage of seedling hardening. 2 ~ 3 true leaves were sprayed quickly with 150 ~ 300 mg/kg ethephon to promote female flower differentiation and shorten internodes.

3. Soil preparation: select the loose and fertile plots that have not been planted with melon crops for two years for fine soil preparation. Apply 5000 kilograms of soil and miscellaneous fertilizer per mu; Compound fertilizer 100 kg, cake fertilizer 100 kg. About a week before transplanting, the whole soil should be used as a border, with a width of 1 m, a depth of 20 cm and a width of 50 cm.

4. Planting: It will be carried out in early March and in sunny afternoon. 2 rows per bed, 2 plants per hole, and the hole spacing is 40 cm. Plant 4000 ~ 5000 plants per mu.

Verb (short for verb) Management:

1, fertilizer and water management

Cucumber grows fast, and the supply of fertilizer and water should be timely. The fertilization method adopts the principles of "thin fertilizer and diligent application" and "small amount and multiple meals". Generally, it is harvested twice and topdressing once. Keep the soil moist throughout the growing season. Water every 0 ~ 2 weeks according to the soil moisture content after entering the full flowering period.

2. Temperature control

Close the shed for about 7 days to promote the survival of seedlings. Keep the greenhouse temperature for a long time, 20 ~ 25 degrees during the day and 15 ~ 18 degrees at night. When the temperature rises in sunny days, the shed film should be uncovered for ventilation, and the shed should be closed for heat preservation in rainy days. By the end of April, when the temperature is stable above 15 degrees, the film can be uncovered. Strengthen ventilation to promote vigorous growth of seedlings. When the vines grow to 30 cm, start to set up a frame to draw the vines.

Step 3 use hormones

When cucumber blooms in greenhouse, due to the low temperature and less insect activity, it is necessary to use fruit protection agent or 920 spray to protect the fruit, or artificial pollination can be used to improve the early fruit setting rate.

4, pest control

There are mainly downy mildew, Fusarium wilt and powdery mildew. Spraying Bordeaux mixture once every two weeks from the seedling stage, and spraying after irrigation; Spraying bactericide every 7 ~ 10 days. Pests include aphids. High-efficiency and low-toxicity pesticides can be used for control.