1. Characteristics The outer leaves are mostly green, and the leaves have various forms depending on the species. The autumn sowing varieties are early-maturing and mid-late-maturing varieties. The growth period is 50-80 days. The plant type is mostly erect, the leaves are stacked and the inner leaves are brightly colored. After being cut, the sun is slightly more exposed and brighter. The ball is tight, the net rate is high, and the taste quality is excellent. Strong resistance to viral diseases, downy mildew and soft rot. The water consumption during the growth period is very large, and a large amount of water is needed during the entire growth period. In the case of sufficient fertilizer and water, the output is particularly high, and the net production of 667 square meters is generally 6500 to more than 7,000 kg.
2. Requirements for soil and environmental conditions The roots of colored Chinese cabbage are mainly distributed in the shallow soil layer. The plantation should be in fertile, loose, aerated, water-retentive, fertilizer-conserving sandy loam soil, loam soil and light clay plots. The thickness of the soil layer is 50 cm. Above, the ph value of 7 - 7.5; growth and development requires a cool and cool climate, seedling and the tolerance of micro-freezing ball period, not high temperature, the temperature reached 32 °C, the growth is very weak, the most suitable in the 10 - 22 The temperature is about °C; the temperature is suitable for buds and seedlings; the temperature is 20-25°C; the light requirement is not strict, and it can grow normally under suitable low light conditions, suitable for close planting, but the light is too weak. Reduced; vegetative growth long photoperiod conducive to photosynthesis, short days can promote the ball.
3. Requirements for fertilizer and water conditions Colored cabbage is a vegetable with a large amount of water, and requires less water during the germination period. Since the root system is very shallow during the seedling period, it should be watered regularly. The water requirement during the rosette stage is large, but watering should be appropriate to prevent moisture. Too much cause appetite, affect the roots under the bar and the heart; the ball needs more water, should be a lot of water, prompting the ball to grow rapidly. Potassium uptake was greatest throughout the growth period, followed by nitrogen and calcium, and less uptake of phosphorus and magnesium. In the cultivation of colored Chinese cabbage, fertilization should be combined with organic fertilizers and chemical fertilizers, and fertilizers should be applied according to different growth stages.
4. Cultivation Techniques The spring cultivation should be based on local nursery temperature or minimum temperature when the temperature is at least 5°C. Autumn sowing is generally planted in North China in August and in mid-August. The Yangtze River Valley is planted in late August and South China is planted from August to November. The alpine region is due to advance from June to July. The specific time should be based on the fertility of different breeds. In the period, the best sowing time is the date when the growth period is backed by the local cold wave of -2°C or more. Premature, hot weather, susceptible to viral disease; too late, lack of growth period, affecting yield. Planting plots of 667 square meters of applied organic manure 4000-5000 kg, 40 kg of potassium sulfate compound fertilizer as basal fertilizer, deep-turning 30 centimeters, flattening, making a high 15-20 centimeters of small stilts, about 1.3 meters wide , plant 2 rows per plant. At present, such cabbage seeds are relatively rare. Whether they are imported varieties or domestic varieties, the seed prices are correspondingly higher. Therefore, most of them are mainly seedling transplanting, which not only saves money, but also ensures that the seedlings in the fields are uniform and Miao Qi is convenient. management. Breeding seedlings with 5 - 6 true leaves, the choice of shade in the afternoon colonization, with the soil as little as possible when the seedlings injured the root system, according to the planting distance of 50 - 60 cm colonization, immediately after planting watering. After easing the seedlings to chase a fat tree, 667 square meters of urea 20 kg, every 5 - 6 days watered once, keep the soil wet and dry alternately. At the late stage of rosette growth, pour a large amount of water and seedlings to promote the development of a large number of root systems. After the start of the package, increase the topdressing, watering capacity, 667 square meters of potassium sulfate 25 kg, 20 kg of urea, ditch applied or acupuncture points. Stop watering 10 days before harvest. Throughout the growing period, special attention was paid to the damage of aphids and cabbage caterpillars, insect pests were found, and medicine was promptly controlled. To ensure normal growth during the growth period, fully increase production and obtain the best economic benefits.
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