Hollow vegetable greenhouse plastic cultivation technology in winter
1. Variety Selection The varieties that are suitable for planting in our province are large chicken yellow, big bone blue, flag leaf, silk worm, big chicken blue and so on. Second, the cultivation season, greenhouse cultivation can be basically annual production, annual supply, in order to obtain higher economic benefits, it should be arranged in October to December sowing, December to March next year, listed. 3. Soil Fertigation Spinach Grows fast, has strong branching ability, needs more fertilizer, and should be applied to base fertilizer when planting. Generally, 1500-2000 kg of organic fertilizer is applied per mu and 100 kg of vegetation ash is mixed with the soil. 20 centimeters wide and 130 to 150 centimeters wide (including ditch). D. Seed Soaking Seed of spinach water spinach Seeds are thick and hard, if direct sowing will be slow to germinate due to low temperature, in case of prolonged low temperature and rainy weather, it will cause seed rot, so it should be sowed after germination, can be warm water around 30°C Seed soaking for 18 to 20 hours, and then germinated with gauze placed at 30 °C, when 50% to 60% of the seeds can be sown when exposed. 5. Seeding of water spinach can be used for spreading or seeding. The amount of seed per acre is 15 to 20 kg. After sowing, it covers about 1 cm thick with fine soil. Drilling can be digging a depth of 2 to 3 cm every 15 cm on the surface. Shallow ditch, spread the seed evenly in the shallow ditch, cover with fine soil again, then cover the surface with sunshade net, drench water, can open sunshade net after emergence. Sixth, greenhouse management 1. Temperature and humidity management: During the cultivation of greenhouses in winter, the low temperature, high humidity, and long duration of low temperature and rainy weather are extremely unfavorable to the growth of thermophilic water spinach. Therefore, it is the key to anti-seasonal cultivation of water spinach. After sowing, when the sun is full and the temperature is high, ventilation and dehumidification should be intensified to prevent the temperature in the greenhouse from exceeding 35°C and to prevent plant diseases so as to maintain vigorous growth and increase yield; if sowing occurs after encountering cold weather, Seal the greenhouse in time and keep the temperature in the greenhouse above 10°C, otherwise it will cause freezing damage. The relative humidity of the air in the greenhouse may reach 100% at higher temperatures and rainy days. At this time, the membranes at both ends or around the greenhouse must be timely opened for ventilation. 2. Fertilizer and water management: Spinach is a crop that is harvested many times. Therefore, in addition to applying base fertilizer, it is necessary to conduct multiple top dressings to obtain high yields. 10% to 15% of the dilute human fecal urine can be used during the seedling period, 1000 ~ 1500 kg per mu; when the seedlings have 3 to 4 true leaves, 15 ~ 20 kg of compound fertilizer and urea 2 ~ 4 kg mixed application; Harvesting time is 1 time for top dressing and 1 to 5 kg for compound fertilizer per mu. Water spinach needs a large amount of water and it should be watered regularly to keep it moist. 3. Disease and pest control: The major diseases of greenhouse cultivation in greenhouses are damping-off and stalk rot in seedlings, which are caused by low temperature and high relative humidity. Through dehumidification, the occurrence of diseases can be reduced. Times or Kajitong 800 times spray control. Its main pests are crickets and red spiders, which can be controlled 1000 times or 1500 times the dead. 7. Harvesting is generally 35 to 45 days after sowing. When the water spinach plants grow to 35 cm in height, they should be harvested in time. Disposable Surgical Cap,Disposable Bouffant Cap,Surgical Cap With Ties,Blue Surgical Cap Ningbo Carest Medical Instrument Co.,ltd , https://www.carestmed.com