Purple Cabbage Cultivation Technology
Purple cabbage, also known as red cabbage, red cabbage, is a type of cabbage, outer leaves and leaf balls are purple, hence the name purple cabbage or purple cabbage. Purple cabbage leaves purple, leaf surface wax powder, leaf ball nearly round, about 12 cm high, about 20 cm in diameter, plant weight 1.5 to 2 kg. The degree of development of the plant is about 50 cm, the outer leaves are about 20, and the leaves are nearly round, about 33 cm long, about 30 cm wide, slightly greenish near the veins, and dark red in the middle ribs. Purple cabbage is rich in nutrition, especially rich in vitamin C, V and more vitamin E and B. Each 100 grams of edible portion contains 1.4 grams of protein, 0.1 grams of fat, 3.3 grams of sugar, 57 mg of calcium, 42 mg of phosphorus, and 0.7 mg of iron. For fried food, cooking, salad, color, with a special aroma and flavor. It can be cut in half, served with sauce on the pan after being served; Europeans will cut it with salad dressing. Purple Cabbage is a semi-tolerant vegetable that is cool and cool. The temperature of 20 ~ 25 °C for the outer leaf growth. Into the ball period, the suitable temperature is 15 ~ 25 °C. Purple Cabbage has strong cold resistance and can withstand short-term low temperatures of -5°C to -7°C. The soil is most suitable for the cultivation of slightly acidic and neutral loam with good water retention. First, nurture strong seedlings 1. Variety selection The early maturing variety “Zehongâ€, which was introduced from the Netherlands, was cultivated in the open field. The leaf color was purple, the leaf ball was oval, the single ball mass was 0.75 to 1 kg, and the yield per mu was 1500 to 3,000 kg. About 65 to 70 days from planting to harvest. 2. Appropriate sowing and planting in the open field in the spring. From mid-January to mid-February, nursery seedlings, thousands of seeds, and seedlings for nutrition. Before the planting, the nutrient soil was fully watered, and the soil after the sowing was 1.5 cm thick. Then cover the film to make the seedlings grow early. 3. Seedling management age of 70 to 90 days, sowing to 2 true leaves appear 20 to 30 days. The daytime temperature is 25°C and the nighttime temperature is 15°C. After the seedlings are released, the temperature is lowered to 20°C during the day and 10°C during the night to prevent the hypocotyl elongation of the seedlings. It takes 45 to 60 days for the seedling to grow from 3 true leaves to 6 to 8 true leaves. Before starting planting, exercise at low temperature, keep it at about 15°C during the day and 7～8°C at night, gradually approaching the temperature of the open ground. The criteria for strong seedlings are: 6 to 8 true leaves, short internodes, thick leaves, deep color, thick stems, and well-developed root groups. Second, the soil fertigation Purple cabbage is a hi-fertilizer crop. The base fertilizer is generally 5,000 kg of high-quality fertilizer for Mushi, 15 kg of diammonium phosphate, and 15 kg of potassium fertilizer. Generally made of 1 to 1.2 meters flat. Third, colonization It is not advisable to plant early in the open field so as to avoid premature planting and convulsions. Generally after the heavy frost in spring, the temperature is above 6 °C when planting. Take "water stable seedlings", the amount of water is not easy to be too large, in order to promote rapid seedlings and increase the temperature, enhance the resistance of seedlings. The planting density was 50 cm and 50 cm, and 2500-2600 plants were planted per acre. The planting depth was left above the leaves, and the heart was not embedded in soil as the standard. Such as the use of improved mulch film cultivation, the role of a small shed in the early stage, the role of plastic film in the later period, can promote early maturity and high yield. Fourth, field management Purple cabbage requires a large amount of fertilizer, and a total of 4 to 5 dressings are conducted during the seedling stage, rosette stage, and balsamic stage. Among them, the amount of fertilizer is the largest during the rosette period and the bulbous period, and should be reapplied. After easing the seedlings, the seedlings should be poured with 1 time of sapling seedlings. After 10 to 15 days after easing seedlings, 15 to 20 kg of urea should be applied to the water per acre. In the middle of the rosette, the second time dressing is applied. Mushi urea is 15-20 kg, diammonium phosphate is 20 kg, and potassium fertilizer is 10 kg. From the time of colonization to the late 30 to 40 days of the rosette, the beginning of the inner leaf of the rosette indicates that it has reached the ball stage. This period is the period when the purple cabbage grows fastest and has the largest amount of growth. It is also the period when the maximum amount of fertilizer and water is needed. Therefore, the ball stage should be combined with water dressing 2 to 3 times, each time Mushi DAP 10 to 15 kilograms, a small amount of fertilizer in the later period, in particular, before the harvest do not fertilizer too large to avoid the ball. The roots of excessive rain are poorly grown and are prone to disease. Pay attention to drainage. V. Prevention of pests and diseases Soft rot occurs easily during the balling stage, and 72% of streptomycin sulfate soluble powder is sprayed at 4000 times in the initial stage of the disease, and is sprayed once every 7 to 10 days for 2 to 3 consecutive times. For the cabbage caterpillar, cabbagewing moth can be sprayed 2.5% kungfufen 3000 ~ 40m times liquid control. 6. Harvesting Purple cabbage is suitable for harvesting the leaves in a tight and real-time manner. The average yield per mu is between 1500 and 3000 kg. The harvesting standard is that the leaf ball is fully compacted, the root pedicle is cut off, the outer leaf is removed, and the net vegetable is marketed. Lactobacillus Fermentum,Fermentum Lactobacillus,Lactobacillus Fermentum Powder,Lactobacillus Fermentum Probiotic Jiangsu Biodep Biotechnology Co. ,Ltd. , https://www.mbioda.com