Select bedless soil
Seedbeds should be chosen where leewards are sunny and high dry; bed soils are better to use fertile, field-grown soya fruit, melons, and cruciferous vegetables for 5 consecutive years. Sandy soil is better. And should pay attention to choose the top soil of 13 ~ 17 centimeters or less, avoid using garden soil as bed soil; In order to prevent the soil from spreading disease, you can disinfect the bed. Common disinfection methods are: 1 Carbendazim disinfection for every 1000 kg of bed soil with 50% carbendazim WP 25 to 30 grams into an aqueous solution, sprayed on the bed soil, mix well and cover with plastic film, generally by 2 ~3 days to kill various pathogens such as wilt in the soil; 2 Formalin disinfection Sterilize formalin, water and bed soil in a ratio of 1:100:4000 to 5000, then piling up. , covering the plastic film, boring 2 to 3 days after the film was opened to promote the distribution of drug gas. In this way, it can be used after 1 to 2 weeks. In addition, 50% carbendazim or 50% thiram can be used for seed dressing to prevent disease transmission. The dosage is 0.3% of the seed amount.
Immersion germination
Soak the seeds in warm water of 55°C for 15 minutes, stir constantly until the water temperature drops to about 30°C, soak at the room temperature and germination. The time for soaking and germination of different vegetables is different. Under proper conditions, cucumbers require 36 to 48 hours, cabbage and cabbage for about 36 hours, eggplant for 6 to 7 days, pepper for 5 to 6 days, tomatoes for 2 to 4 days, and zucchini for 6 to 8 days. When germinating, the cruciferous vegetables (such as cabbage, cabbage, radish, etc.) have small seeds, and the radicles break through the testa, and the solanaceous vegetables (such as eggplant, pepper, tomato, etc.) should not exceed the seed length; Seeds (such as cucumber, bitter gourd, wax gourd, etc.) can be used for short-sprouts and can be used for 1-2 cm.
Seed management
Before sowing, soaking the bottom of the sowing water, sowing the seed evenly, see dew seed and then spread some medicine soil, and then cover the shade net or straw moisturizing to promote the whole seedlings, and finally cover the film stuffy for a few days until the seedlings “show budsâ€; after sowing, emergence Before, keep the soil moist; temperature control at 20 °C ~ 35 °C, the relative humidity of the air to maintain 85% ~ 90%; emerged when the "hat", seedlings, can be sprayed, after the species shell moisture, brush light Brushing the seed shell lightly; control watering throughout the seedbed, dry the soil when the white tops are very dry, irrigate the water once; minimize the number of waterings to avoid seedlings, and increase the amount of phosphate; increase the resistance of the seedlings. Cold capacity; pay attention to ventilation to prevent excessive air humidity in the seedbed and harmful gas harm vegetable seedlings; in the case of ensuring the seedbed temperature, increase the light as much as possible, so that the seedlings grow robust; timely early seedlings to prevent the sub seedlings caused by too late Root dead seedlings; For the aging seedlings, 0.2% Pensuba or 300 to 500 times more potassium dihydrogen phosphate is sprayed per square meter of seedbed to stimulate seedling growth.
Disease prevention and control
Seedlings are susceptible to blight and damping-off. At the early stage of disease, the diseased seedlings shall be removed first, and spraying shall be timely protected to prevent the spread. Commonly used agents are: copper ammonium mixture (with copper sulfate 2 parts, plus 11 parts of ammonium carbonate, mixing and grinding, sealing 24 hours after serving) 400 to 500 times liquid, 50% carbendazim 600 times liquid, 75% Chlorothalonil or 70% Trichopirtine WP can be 600-800 times the concentration and the concentration of 0.1% to 0.2% of copper sulfate solution. After spraying, in order to prevent the humidity of seedbeds from being too large, weeds can be damped with grass ash or fine dry soil.