Due to the low temperature during the vegetable nursery period in winter and spring sheds, if the management can not keep up, it can easily cause the emergence of rotten seedlings, rotten roots, roots, cold damage, and diseases or dead seedlings. In order to cultivate strong seedlings to make vegetable morning market, the following management measures should be taken:
I. Disinfect the seeds with hot water of 55°C～60°C for 15 minutes to kill the bacteria attached to the seed surface and some of the bacteria that are lurking inside the seeds. Disinfection, use a thermometer to insert water, strictly control, constantly adjust, stabilize the temperature, ensure the time. Disinfect for 15 minutes and soak in warm water below 30°C for about 8 hours.
Second, bed soil disinfection bed soil disinfection methods are: (1) Solanum vegetables with 70% chloronitrobenzene and 50% thiram or mancozeb mixed equal amount, per square meter with a mixture of 8 to 9 Grams, and 15 kg of semi-dried fine soil mix, seeding when 1/3 pad soil, 2/3 cover seed soil. (2) For melon vegetables, use 50% carbendazim or thiophanate-methyl, 1 part of dry fine soil, and mix up 10 kg of medicinal soil per square meter. Take 1/3 of the medicine and sprinkle it on the surface of the pod, sow the seeds of the buds to sow, and then cover the rest of the 2/3 of the medicine, so that the seeds will be caught in the middle of the mortar.
Third, to strengthen seedbed temperature management At an air temperature of 25°C to 30°C and a ground temperature of 22°C to 25°C, seedlings grow quickly and homogeneously. General seeds can not germinate for a long time at low temperature and high humidity conditions, they are easy to rotten species, after the vegetable seedlings are out, the temperature of the greenhouse is kept above 20°C during the day and above 10°C at night. When the two leaves of the cotyledons are fully stretched, the first true leaf is exposed, and the temperature of the canopy is maintained at 25° C. to 28° C. during the day, and the temperature of the canopy is maintained at 15° C. to 20° C. at night to facilitate the growth and development.
Fourth, humidity management is too high, soil temperature is not easy to rise, poor growth of seedlings become weak seedlings, prone to disease or frost damage. The methods of dehumidification are: (1) Ventilation and dehumidification without affecting the temperature of the greenhouse. (2) Pouring enough water during sowing, and avoid watering at seedling stage. (3) Spread 0.5 to 1 cm thick ash on the bed to absorb moisture and increase the temperature. (4) Light bulbs can be placed in the shed to reduce humidity and fill light. (5) The electric wire is laid on the bottom of the bed before sowing.
Fifth, spraying leaf fertilizer seedling spraying 0.1% ~ 0.2% potassium dihydrogen phosphate solution, 0.05% ~ 0.1% calcium chloride solution and other foliage fertilizer, improve seedling disease resistance.
Six, pharmacy disease prevention Seedling blight or damping-off disease, in the early stages of disease removal in a timely manner, and spraying control. Pharmacy can choose 72.2% Preclosure 400 times, 96% hymexazol powder 3000 times, 50% Anke wettable powder 1500 times, 72% Manganese zinc urea urea wettable powder 600 times, 75% 100% Bacterial-clear WP 400 times, 64% anti-virus 400-500 times, pay attention to alternate rotation medication. According to the condition, it takes 7 to 10 days for medication once, and continuously controls 2 or 3 times. The spraying of medicaments should be carried out at noon on sunny days. Do not spray too much of the liquid, so as to avoid high humidity and increase the occurrence of diseases.
I. Disinfect the seeds with hot water of 55°C～60°C for 15 minutes to kill the bacteria attached to the seed surface and some of the bacteria that are lurking inside the seeds. Disinfection, use a thermometer to insert water, strictly control, constantly adjust, stabilize the temperature, ensure the time. Disinfect for 15 minutes and soak in warm water below 30°C for about 8 hours.
Second, bed soil disinfection bed soil disinfection methods are: (1) Solanum vegetables with 70% chloronitrobenzene and 50% thiram or mancozeb mixed equal amount, per square meter with a mixture of 8 to 9 Grams, and 15 kg of semi-dried fine soil mix, seeding when 1/3 pad soil, 2/3 cover seed soil. (2) For melon vegetables, use 50% carbendazim or thiophanate-methyl, 1 part of dry fine soil, and mix up 10 kg of medicinal soil per square meter. Take 1/3 of the medicine and sprinkle it on the surface of the pod, sow the seeds of the buds to sow, and then cover the rest of the 2/3 of the medicine, so that the seeds will be caught in the middle of the mortar.
Third, to strengthen seedbed temperature management At an air temperature of 25°C to 30°C and a ground temperature of 22°C to 25°C, seedlings grow quickly and homogeneously. General seeds can not germinate for a long time at low temperature and high humidity conditions, they are easy to rotten species, after the vegetable seedlings are out, the temperature of the greenhouse is kept above 20°C during the day and above 10°C at night. When the two leaves of the cotyledons are fully stretched, the first true leaf is exposed, and the temperature of the canopy is maintained at 25° C. to 28° C. during the day, and the temperature of the canopy is maintained at 15° C. to 20° C. at night to facilitate the growth and development.
Fourth, humidity management is too high, soil temperature is not easy to rise, poor growth of seedlings become weak seedlings, prone to disease or frost damage. The methods of dehumidification are: (1) Ventilation and dehumidification without affecting the temperature of the greenhouse. (2) Pouring enough water during sowing, and avoid watering at seedling stage. (3) Spread 0.5 to 1 cm thick ash on the bed to absorb moisture and increase the temperature. (4) Light bulbs can be placed in the shed to reduce humidity and fill light. (5) The electric wire is laid on the bottom of the bed before sowing.
Fifth, spraying leaf fertilizer seedling spraying 0.1% ~ 0.2% potassium dihydrogen phosphate solution, 0.05% ~ 0.1% calcium chloride solution and other foliage fertilizer, improve seedling disease resistance.
Six, pharmacy disease prevention Seedling blight or damping-off disease, in the early stages of disease removal in a timely manner, and spraying control. Pharmacy can choose 72.2% Preclosure 400 times, 96% hymexazol powder 3000 times, 50% Anke wettable powder 1500 times, 72% Manganese zinc urea urea wettable powder 600 times, 75% 100% Bacterial-clear WP 400 times, 64% anti-virus 400-500 times, pay attention to alternate rotation medication. According to the condition, it takes 7 to 10 days for medication once, and continuously controls 2 or 3 times. The spraying of medicaments should be carried out at noon on sunny days. Do not spray too much of the liquid, so as to avoid high humidity and increase the occurrence of diseases.
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