Purple potato is rich in anthocyanin, which has many health functions such as enhancing human immunity, delaying aging, fighting cancer, cosmetology, and preventing hypertension. Therefore, purple potatoes can be used as a side dish, but also as a special dish, or a very good raw material for the extraction of anthocyanins. After years of research and cultivation, many varieties have been derived, such as black beauty and black diamond. The purple potato is suitable for cultivation in all major potato production areas and sub-production areas in China, and the cultivation method is basically the same. At present, purple potato cultivation area in the country is still small, the market price of 6 to 8 yuan per kilogram, equivalent to 6 to 8 times that of ordinary potatoes, general yield of about 2500 kilograms per mu, more than 10,000 yuan in economic benefits. Therefore, the new purple potato varieties and their supporting cultivation techniques are of great concern to the farmers.
The whole growth period of purple potato is about 93 days. It is a medium-late-maturing variety, drought-tolerant and cold-resistant, and has wide adaptability. The potato block is resistant to storage. Anti-early blight, late blight, ring rot, black shank and virus disease. Its seedlings are erect, dark purple, luxuriant, strong growth. General plant height about 60 ~ 70 cm, the main stem developed, stem diameter 1.3 ~ 1.4 cm, dark purple stem, cross-sectional prism, fewer branches, purple petiole, purple corolla, dark purple petals, potato block oval, The skin is smooth, dark purple, dark purple and good quality. Concentrated potato, single plant 6 to 8 potatoes, weight of 120 to 300 grams.
Choose a flat and high dry land, convenient drainage and irrigation, soil texture is loose, deep, fertile sandy loam soil is appropriate. Deep plowing 25 to 30 centimeters before winter, fine soil preparation in the early spring, full base fertilizer. Purple potato is a high-yielding fertilizer crop. Each production of 100 kilograms of fresh potatoes requires 0.5 kg of nitrogen, 0.2 kg of phosphorus, and 0.95 kg of potassium. Combined with site preparation, Mushi rotted organic fertilizer 3000-4000 kg, superphosphate 80-100 kg, and potassium sulfate fertilizer. 15 to 20 kg, 15 kg of urea.
20 to 30 days before planting (usually before and after mid-January), select the seed potatoes and choose seedless, disease-free, non-wound, smooth skin, fresh skin color, many buds, uniform size and the characteristics of the varieties of seed potatoes, each About 120 kilograms of seeded potatoes are needed. Warm seed germination of the seed potatoes, after germination cut into pieces, each about 25 grams, to ensure that 1 to 2 strong buds. Cut the sweet potato into 500 times 50% carbendazim solution, soak for 5 to 10 minutes, then remove and dry, dry for 3 to 5 days so that the buds are green and robust.
Usually when the ground temperature is stable at 5°C, it can be planted at about 5°C, and sowed from about mid-to-late March to early April. Premature seedlings are susceptible to freezing damage, and they cannot be listed first before they affect planting efficiency. The use of mulching mulching to cover double rows allows for early colonization for approximately 15 days. Purple potatoes should be sparsely planted in double rows, with a spacing of 0.4 m, spacing between 30 and 35 cm, and about 4,000 plants per acre. Planting is based on the size of the plant spacing, and a planting hole with depth of 8 to 10 cm is used for opening the plant. Then put the seed buds upside down and seal the membrane holes with fine soil.
Purple potatoes only have about 65 days of growth after the emergence of the seedlings, and the field management should highlight an early word, and the principle of controlling the food should be mastered before production. Technical management should be timely, early cultivator, early fertilizer, early watering. After flowering, according to the weather, soil moisture, plant growth conditions, as appropriate, topdressing, small water ground pouring, promote tree attacking potatoes, potato control trees. During the budding period, attention should be paid to the loss of nutrients and reduce the increase of seed potatoes. When the plant height is 15 to 20 centimeters, it can be properly controlled to prevent leggy and lodging and increase the rate of large and medium-sized potatoes.
According to sowing sooner or later, the stem leaves yellow period, timely harvest, timely listing, under the pit storage.
Purple potatoes are susceptible to late blight and viral disease. Insect pests are mainly cockroaches, cockroaches, and tigers, and need to be controlled in time. Pay attention to purple potato bogey and eggplant, pepper, sweet potato and other solanaceous crops rotation, to wheat, corn, Chinese cabbage, radish and other crops for the Qiang better.
KOKEN Co., Ltd , https://www.hnb-maker.com