Early cabbage cultivation techniques

As early as cabbage Chinese cabbage is a popular vegetable, its cultivation techniques are as follows: First, the species selection period of 50 to 60 days, from mid-April to mid-October can produce varieties, 667 square meters with 20 grams, more Breeding method. Second, nursery is to grab the morning market and raise seedlings in mid-April. Choose the plots of the cruciferous crops that have not been planted before, such as cabbage, Ganlan, etc., and prepare the earthworms. Usually, the length is 10m to 20m, and the width is 1m to 1.5m. It is better to dig 10cm below the surface. In order to increase the temperature of the earthworms, 5 kg to 10 kg of composted soil is applied to each field. At the beginning of April, the ground was baited, and in mid-April, the glutinous rice was irrigated, and the glutinous rice was cut into 6 cm and 6 cm of earth. In the center, 0.5 cm in size and 1 cm in depth were planted. The seeds are then soiled with sand and soil to prevent knots and dampness, and then the shed is warmed. Third, seedling management at this time large temperature difference between day and night, during the day against heat, antifreeze at night. The temperature after sowing is about 25°C, 15°C at night, 20°C～25°C during the day after emergence, 12°C～15°C at night, no drought or watering. Pay special attention to the fact that the temperature cannot be lower than 10°C for a long period of time, especially at night, so cover the shed at low temperatures to prevent flowering and bolting. Breathing seedlings during daytime, close to natural temperatures. At the same time, it is also necessary to prevent the pests of yellow strips from harming. Fourth, planting should be done as early as possible, before the selection of fertile cruciferous crops have not been planted land, per 667 square meters of 5,000 tons of manure compost, ammonium nitrate 10 kg to 16 kg, 10 kg of stone. In the first half of May, when the seedlings grow to 6 to 8 leaves when planting, apply fertilizer 7 kg to 10 kg diammonium, to stay away from the earth to prevent burning seedlings, burning roots, with water plant spacing 30 cm 60 In centimeters, 4000 seedlings per 667 square meters. Fifth, field management 1. Check seedlings fill seedlings. Cloudy and rainy days with soil transplanting. 2. Weeding and weeding. Shovel locks can eliminate weeds and fertilize the soil. It can be used as a spatula and squat in 10 leaves. The second spade should not be too deep during the rosette period, and it can easily injure the roots. 3. Fertilization. Every 667 square meters in the rosette season ammonium nitrate 6 kg ~ 10 kg, the ball beginning of the application of ammonium nitrate 13 kg ~ 25 kg, combined with Shi Shi 10 kg, while the foliar fertilizer, spray foliar Bao, 0.3% urea Solution and so on. The method is to cover the soil after applying the fertilizer in the planer pit between the two. If drought is combined with irrigation, rain can be sprinkled between the two plants, but do not touch the seedlings. 4. Irrigation. Cabbage contains 94% water, strong transpiration, root distribution, can not use deep water, must be watered. Rosette period: to take seedlings measures to promote the roots to the longitudinal and deep direction of development for the heart to build a foundation, first pouring enough water until the ground is slightly dry, cultivator, seedlings combined with fertilization after watering, once drenched, and promote growth. Knocking period: It is the period when the leaf ball grows the most, and has the greatest impact on the yield. Water shortage is slow and not solid. Therefore, it should be grounded and shallowly poured. It should be poured once every 7 days to 8 days. It should be stopped until the week before the listing. Watering should be done early or late, and cultivating in time. 6. Harvesting Intercropping or septum harvesting is required in mid-June according to market conditions. The production method of the lower jaw is the same as above, but the temperature should be raised when raising the seedlings. Seven, control measures 1. Virus disease: to timely adjust the temperature and humidity of the seedlings. 2. Downy mildew: Use 50% dexamethasone 500 times, or 75% metalaxyl 800 times, or 40% clotriaxone. 3. Soft rot disease: Use 800 to 1000 times of enemy powder to irrigate the roots, or spray 50% of dexamethasone 500 times. 4. Aphids, ground pips, diamondback moth, and yellow striped jumpscotch: 90% dichlorvos 800 times available, or 20% faster off Ding 4000 times 5000 times spray.

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