Choosing good vegetables for cultivation in greenhouses in the sun greenhouses, because it is in the severe winter season, should be selected in advance in the middle of the greenhouse to take the ground hot nursery, seedlings buckle small arch shed insulation; plastic greenhouse cultivation of vegetables should be nursed in advance in the greenhouse, can The seedbeds were arranged in the southern part of the greenhouse, where they were planted in the east and west, and placed in a shed a week before planting. No matter what kind of nursery methods, pay attention to have enough nutritional area to prevent overcrowding caused by seedlings.
Consider the use of species as the saying goes, "There is money to buy seeds, no money to buy seedlings," so the amount of seedlings should be set aside for 20% of the seedlings. The seed amount can be calculated according to cultivation area, seed quality, planting density, and technical level. Seedlings, dead seedlings, seedlings, and young seedlings that are to be eliminated are counted in the seedlings.
Seed disinfection should be properly hot water hot seeds to maintain 5-15 minutes after the temperature and cooling, and constantly stirring to prevent burns and seeds. Seed soaking before sowing seeds should be soaked for 2 / h, so that the seeds after water swelling and soaking agents. After the agent is immersed, it is washed with water and then soaked or germinated to prevent the emergence of phytotoxicity.
The temperature should be suitable to start the germination when the temperature is higher than the appropriate temperature of 2 °C - 3 °C, buds and fast and homogeneous, especially in the application of Chen seeds more obvious, but immediately after the "whitening" to the appropriate temperature. The higher temperature after sowing is conducive to emergence, can use geothermal heating. The ground wire nursery should be turned on one day in advance and sowed after the bed temperature rises. When the seedlings are unearthed more than 70%, they should be ventilated immediately to prevent the occurrence of "high-legged seedlings"; 2 true leaves should be kept at a higher temperature to prevent the seedlings from aging due to low night temperature, and seedlings of melons and other seedlings should be topped with flowers. Solanaceae Vegetables produce deformed flowers.
Watering should not be too large except for soaking the bottom water before planting. During the nursery period, it should be mainly water-retaining and should not be watered. After seeding, a layer of plastic film is placed on the seed bed, and in addition to heat preservation, the water retention effect is also very good. After removing the seedlings, remove the mulching film, and then cover the sifting fines once after the water droplets on the seedlings are removed to bridge the soil gap and reduce the evaporation of water. If the bed soil is too dry, water can be sprayed on the watering can, but after the water is sprayed, the dry soil should be covered.
Note that the anti-freezing and warm-weather dishes are vulnerable to freezing during the seedling stage, especially during the hardening period, and the sudden cold attack will freeze the seedlings. It is necessary to listen to the weather forecast in a timely manner. It was found that proper shading should be applied after freezing injury, so that the temperature will rise slowly, and the foliar fertilizer will be used to mitigate the freezing damage.
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