Spring cabbage has strong adaptability, easy cultivation, and early listing. It plays an important role in the supply of vegetables in early spring. In order to strive for early maturity and high yield, measures for arch cover should be adopted in production, and the following technologies should be focused on cultivation. First, the use of good varieties of cold resistance, tight ball, good quality, difficult to twitch, suitable for early planting dense planting. Such as "China Gan 11", "Lugan 1", "Zhong Gan 12" and other varieties. Second, timely cultivation of strong seedlings 1. The determination of the sowing date The outstanding problem in the production of spring cabbage is unripe convulsions because cabbage is a vernalized vernalized crop. If the seed is sown too early, the seedlings grow too large, and when it encounters low temperatures, the vernalization phase is completed, causing early convulsions. Sowing should be appropriate. Generally use Yangshuo or solar greenhouse to raise seedlings in the middle and late December to early January. The specific time can be arranged according to the actual situation. 2. Seedbed preparation before sowing The nursery bed should be full of decomposed manure or earth compost, and be sterilized with carbendazim, deep smashing. 3. Seed treatment and seeding Select full seeds, soak them in warm water at 18°C ​​for 2 hours, and then maintain germination at 15°C to 18°C. In the sunny morning, fill the bottom water. After the water seeps, the germinated seeds will be evenly spread on the surface. The soil will cover 1cm and the seeding rate will be 4g per m2. The seedbed area per 667m2 will be 5m2. 4. Do not ventilate seedlings before the emergence of the seedlings. The daytime temperature should be maintained at 20 to 25°C and at night it should be 10 to 16°C. Appropriate ventilation after seedling emergence, daytime temperature 18 ~ 20 °C, night 10 ~ 12 °C, in the seedlings after five true leaves after the temperature can not be lower than 10 °C, to prevent seedlings through the vernalization stage, the occurrence of pre-convulsions. 8 days before colonization, ventilation can be increased to carry out cold temperate seedlings. Third, fine soil preparation, early shed Select fertile and fertile, slightly acidic or neutral soil near the water source, apply 5,000 to 7500kg per 667m2 of pre-winter decomposed manure, deepen 20cm deep, make 1m or 1.5m wide flat rake, and bury the ground in the buckle shed 25 days before planting. Fourth, reasonable dense planting After the frost in spring, the ground temperature is stable above 5°C. Colonization temperature is not lower than 9°C before planting. The plastic film canopy can be covered and cultivated. From the end of February to the beginning of March, the sunny morning planting can be selected. Protect the soil when transplanting seedlings. Planing after watering pendulum, water infiltration after the cover soil. Can also be first ditching, then ditching seedlings, after the pouring of water, colonization of 5000-6000 per 667m2. V. Strengthening field management 1. Temperature Management After planting, pay attention to cold insulation, improve management around the improvement of temperature conditions, from 4 to 9 in the morning, cover the grass around the seedlings, during the period of 7 to 10 days, generally do not release air, increase the temperature of the greenhouse, During the day, it is 25-27°C and 11-15°C at night. After the seedlings are tempered, the temperature is lowered and the seedlings are kept for about 7-10 days during the day and 15-20°C during the day and 12-14°C during the night. When the temperature in the shed grows above 20°C in the early stage of growth, the wind is released. When the minimum temperature in the shed is stable above 10°C, remove the small shed inside the shed. 2. Water and Fertilizer Management After the first 15 days of planting, the first topdressing will be performed with 15 kg of ammonium sulfate per 667m2 and watering. After the appropriate water control seedlings, when the ball began to cohere with the end of the seedlings, and the first time the top dressing, diammonium phosphate per 667m2 30kg, or with water flushing manure compost faeces 800kg. Afterwards, pour water once every 7 days, but stop watering for a few days before harvest to facilitate transportation. 6. Harvesting In order to fight for the morning market, it can be listed and supplied at a time when Yeh Baeba is at a close. It usually takes 3 to 4 days to harvest 1 time, and then it is harvested 1 to 2 days later.
with transverse stolons. Leaves 3-11; leaf blade ovate, slightly leathery; petiole glabrous. Scapes yellow-green, narrowly ovate, apical apex; petals nearly lanceolate, apex acuminate, Middle slightly widened, with honey groove; stamens long only about 1/2 of the petals; anthers yellow, filaments narrowly linear; style slightly curved. Oval oblong, carpels stalked puberulent. March-April flowering, April-June results. Specialty Chongqing pillars yellow water. Health elevation of 1600-2200 meters between the mountain forest, often cultivated, wild rare. Rhizome is a famous traditional Chinese medicine ("Coptis"), with berberine, Coptidis base, Coptis base, tetrandrine and other alkaloids, can cure acute conjunctivitis, acute bacillary dysentery, acute gastroenteritis, hematemesis, Embolism.
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