In winter and spring, the temperature is relatively low. In order to make vegetables in the morning market, cultivation of greenhouses is the key. There should be a good five barriers for the cultivation of eggplant and melon vegetables.
Disinfection
Seed Disinfection: Using hot water at 55~60°C for 15 minutes to kill germs attached to the seed surface and some of the bacteria that are lurking inside the seeds. When disinfected, insert the thermometer into the water, strictly control the constant adjustment, stabilize the temperature, and ensure the time. The seed germination was sterilized for 15 minutes and soaked in warm water of 30°C or less for about 8 hours. Then it was packed into a gauze bag, and then put into a wide plastic bag. The germination was performed at a temperature of 25-30°C, and it was periodically turned. Cleaning, ensuring temperature, can germinate neatly.
Bed soil disinfection: Bed soil is not sterilized, and there are many diseases at the seedling stage, and the resulting losses cannot be recovered. The measures are: 1. Solanaceous vegetables are mixed with 70% pentachloronitrobenzene and 50% thiram or mancozeb. The mixture is 8-9 grams per square meter, mixed with 15 kg of semi-fine soil. Evenly, 1/3 of the seed pad soil is used for seeding, and 2/3 cover seed soil. 2, melons with 50% carbendazim or thiophanate-methyl, dry fine soil of 1000, dubbed medicine soil, spread 10 kg per square meter, method ibid.
Temperature off
At a temperature of 25~30°C and a ground temperature of 22~25°C, the emergence is quick and homogeneous. In general, seeds that are not able to germinate under low temperature and high humidity conditions for a long time are easy to rot, and cannot be sloppy. After the vegetable seedlings are flushed, the temperature in the greenhouse is kept above 20°C during the day and above 10°C in the evening. The seedlings are subjected to a low-temperature hardening seedling to enhance disease resistance, cold resistance and avoid long growth. When the outside temperature is no higher than 15°C at noon noon, ventilation can be made through the window and the sun shines. At night, the outside temperature is lower than 4°C to cover the straw curtain. When two cotyledons are fully stretched and the first true leaf is exposed, the temperature in the daytime can be adjusted to 25~28°C, and the temperature in the night can be adjusted to 15~20°C to facilitate growth and development.
Humidity off
Humidity is too high, soil temperature is not easy to rise, poor growth of seedlings becomes weak seedlings, prone to disease or frost damage; the humidity is too low, and the lack of water due to fertility is suppressed. Low humidity can be solved by watering, while high humidity is more troublesome and is not handled well. Blemish and blight occur one after another and can cause large dead seedlings. Therefore, we must pay great attention to it. The method of dehumidification is:
1. Ventilate and reduce humidity without affecting the shelf temperature. 2, pouring enough water when sowing, avoid watering the seedling period. 3. Apply 0.5-1 cm thick ash on the bed to increase moisture and temperature. 4. Put a parallel light bulb under a small shed to dampen and fill light. 5. The electric wire is laid on the bed before sowing.
Disease related
Diseases should be prevented and treated in time. Solanaceous fruit damping-off disease can choose to use quintoxe or anti-virus quinone, melon plague disease can choose to use chlorothalonil or anti-virus quinones; blight can choose to use dexamethasone or methyl quicterine, both diseases occur simultaneously Preclosure or Formosa can be used. If none of the above two drugs can choose chlorothalonil or anti-virus drugs. For the prevention of Bacillus subtilis, Brown Vegetation, and Botrytis cinerea should also be prevented from the seedling stage. Chlorothalonil, antiviral bacillus and sulfasulfuron should be selected. According to the situation, it is possible to flexibly master comprehensive prevention and control.
Fertilization off
When nurturing strong seedlings, formula fertilization should be adopted when preparing bed soil, and base fertilizer should be applied at one time so that the seedling stage will not be top-dressed. If the bed soil is not fertile, the small yellow leaves of the vegetable stems and stems should be topdressed. But should pay attention to: 1, select the sunny morning morning to deal with human fecal urine, pig manure, diluted with 20 times the water before topdressing, and finally rinse with water to prevent burning leaves. 2, as far as possible without fertilizer, if the concentration is low when used, with urea 0.1% is appropriate. 3. Application of brassin lactone, which is an endogenous plant hormone, is different from any other hormones and chemical fertilizers, is non-toxic and very safe, and can be sprayed on bed soil and foliage. It is characterized by deep rooted leaves, strong seedlings, and resistance to stress. Sexuality is enhanced, and the comprehensive traits are good, and it is an ideal boosting agent for nursery.
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