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High yield and high efficiency cultivation method of greenhouse celery
First, nurture strong seedlings and lay a good foundation for high yields. Greenhouse celery seedlings are planted in early July and can be sowed by the method of sowing seedlings. The seedlings are 5 meters long and 1 meter wide. Before the planting process, combine high-quality farmyard fertilizer with 30 kg of fertilizer and 65 kg of diammonium phosphate per plant. Each plant has a seeding capacity of 50 grams, and 1 mu of celery requires 60 square meters of nursery land. After planting, do a good job of shading and moisture management to facilitate emergence. After the emergence of the seedlings, keep them wet and dry. After the heavy rains, drain the water in time to prevent the earthworms from smashing. Seedlings grow to a period of 2 to 3 leaves for thinning, and the distance between the seedlings is preferably 2 to 3 cm. The criteria for strong seedlings are as follows: Maturation age of 50 to 60 days, plant height of 15 to 20 cm, 6 to 7 pieces per plant, and stem base diameter of about 0.5 cm. Second, rational close planting, cultivation of robust plants. The cultivation of robust plants and proper close planting are the key to increase production of greenhouse celery. The celery planting time is in early September, and the shed film is buckled in mid-to-late October. When cultivated, a 6-meter-meter flat pod can be planted with a plant spacing of 7 cm and a row spacing of 10 cm. In order to cultivate robust plants, secondary seedlings should be adopted. The first seedling time was 7 days after the seedling was slowed to the greenhouse before the film was buckled, and the second seedling time was in the initial stage of the greenhouse buttoning, with about 15 days per seedling. The first time the seedlings were controlled mainly by water, generally pouring water once every 7 days or so to keep the wet surface dry. The second time the seedlings were mainly controlled by temperature, supplemented by water control, and the ventilation and temperature reduction at the initial stage of membrane depressing was performed. Especially during the first half of the night, indoor high temperatures could not occur. The daytime temperature was controlled at 18°C ​​to 20°C and the nighttime temperature. Control at 12 °C ~ 15 °C. Using the secondary seedling method, the base diameter of the plant can reach about 1.5 cm. Third, the basic fertilizer, the full price of fertilizer. Applying basic fertilizer and fertilizing fertility can improve the physicochemical properties of the soil and make celery obtain high yield. Prior to planting, the combination of deep-trimmed and soil-graded farmhouse manure, pig manure and other quality farmhouse fertilizers of 10 cubic meters, 50 kg of diammonium phosphate and 25 kg of potassium sulfate. After easing the seedlings, it is advisable to apply 15% fertilizer every 15 to 20 days in combination with irrigation, and alternately or mixedly apply nitrogenous fertilizer and phosphorus and potassium fertilizers. After each acre, apply 25 kg urea or 20 kg of diammonium phosphate and 10 kg of potassium sulfate. If topdressing three yuan compound fertilizer, 40 ~ 50 kg per mu is appropriate. In addition, it can also be combined with the control of pests and diseases to conduct extra-root fertilizers, spraying foliar fertilizers such as love-over, spray-powder, Yunda 120, and borax to meet the demand for various nutrients in the whole growth process of celery, in order to increase production. And improve quality. Fourth, adjust the temperature and light to create a suitable growth environment. Celery is more tolerant to cold, but can easily twitch under conditions of low temperature and long days. Therefore, light and temperature management should be strengthened during cultivation. In the winter management process, grass mulberries need to be covered as soon as possible to cover and clean the membrane surface in order to facilitate warming and heat preservation. The indoor day temperature is maintained at 15°C～25°C, and the night temperature is maintained at 10°C～15°C. The minimum temperature is not low. At 5°C. After warming weather in March of the following year, indoor temperature and lighting time should be properly controlled to enhance ventilation and temperature reduction. Grasshoppers should be properly exposed and covered as soon as possible to artificially increase adhesions on the membrane surface and control the time and intensity of indoor illumination. The indoor daytime temperature is controlled between 18°C ​​and 20°C, and the maximum temperature is not to exceed 25°C. When the temperature reaches 23°C, the temperature should be reduced to promote vegetative growth, to control reproductive growth, to delay the time of convulsions, and to extend the harvest period. Fifth, comprehensive prevention and control of pests and diseases. Insect pests of celery mainly include aphids and cabbage caterpillars, which can be treated with 40% dimethoate EC 800 times or fast extinguishment and 1500 times liquid spray. The main diseases of celery are spot blotch, leaf spot disease, and soft rot, etc. The prevention and treatment should pay attention to the irrigation and dehumidification work, and medication should be given before the onset of disease or in the field, focusing on the nursery period and colonization. The disease prevention work in the early period of the buckle film, the buckle film to the first harvest period, and the warm weather. Disease prevention and control can be used 75% chlorothalonil 600 times, 50% mancozeb 600 times, 77% can kill 400 times spray, generally every 7 days spray 1, with 3 to 4 agents alternately used as it is good. When the disease is serious, it can be used with dust agent and aerosol agent. Spraying 2~3 times can control the development of the disease.