Purple potato high-yield cultivation technology Purple potato high yield, strong adaptability, very wide range of uses. It is measured that every 100 g stem contains protein 2.30 g, fat 0.10 g, carbohydrate 16.50 g, calcium 11.00 mg, iron 1.20 mg, phosphorus 64.00 mg, potassium 342.00 mg, magnesium 22.90 mg, carotenoids 0.01 mg, thiamine 0.10 mg, riboflavin 0.03 mg, niacin 0.40 mg, antiserotin 16.00 mg and anthocyanin 100.00 mg. Its most characteristic lies in its high yield, strong adaptability and wide range of uses. 16.00 mg and anthocyanin 100.00 mg. Its biggest feature is rich in anthocyanin, the content of which is up to 42.80 mg/kg, with the enhancement of human immunity, delaying aging, physical fitness, anticancer, cosmetic and prevention of hypertension and other health effects. Therefore, purple potatoes can be used as side dishes. And can be used for special dishes, or very good extraction of anthocyanin processing raw materials. At present, the purple potato in the domestic cultivation area is still small, the market price per l kg 6 ~ 8 yuan, equivalent to ordinary potato 6 ~ 8 times, general 667 mz production of about 2,500 kg, the economic benefits of more than 10,000 yuan. The economic benefits are quite considerable. New varieties and supporting cultivation techniques are of great concern to farmers. Purple potato full-life span of about 93 d. Is a medium-early maturity varieties, drought-resistant, cold-resistant, widely adaptable, potatoes resistant to storage. Resistant to early blight, late blight, ring rot, black shin disease and virus disease. The seedlings are erect, dark purple. The bushes are luxuriant, with strong growth potential. The general plant height is about 60.00 cm. The main stem is developed. Stem thickness 1.37 cm, stem dark purple, cross-sectional three-angled, less branching. The petiole is purple, the corolla is purple, the petals are dark purple, and the potatoes are long oval. Smooth skin, black purple, dark purple flesh, good quality. Fruiting concentration, single-plant fruiting 6-8 potatoes. Single piece of quality 120-300 g. 2 Preparing for cultivation 2.1 plot selection, loose, permeable soil tillage, therefore, choose the terrain is high and dry, the terrain is flat, drainage and irrigation is convenient, the soil texture is loose, deep, fertile sandy loam planting is to ensure that the soil base of the yield. 2.2 stubble arrangement, purple potato avoid heavy crop and rotate with tobacco, eggplant, chili peppers, sweet potato and other lycophytic crops to wheat, maize, cabbage, radish and scallions, and other crops, such as wheat, corn, and other crops, Cabbage, radish and onion crops for the previous crop is better. 2.3 whole land for the realization of the purple potato high yield and high quality. Planting land should be deep plowing before winter, generally plowing depth of 25-30 cm. early spring for fine ground preparation, to achieve the soil is fine, no large clods, to enhance the soil's water retention capacity. 2.4 adequate bottom fertilizer, purple potato is a high-yield fertilizer-loving crops. Each production of 100 kg of fresh potatoes need nitrogen O.50 kg, phosphorus 0.20 kg, potassium 0.95 kg, nitrogen, phosphorus, potassium absorption ratio is generally 2:1:4. should be cattle, sheep, pigs, chicken manure and green manure, compost-based, supplemented by the right amount of fertilizer. According to the results of soil nutrient testing and fertilizer demand law to determine the fertilization program. Combined with land preparation, every 667 mz with rotted organic fertilizer 3-5 ms, calcium superphosphate 80-100 kg, potassium sulfate fertilizer 15-20 kg, urea 15 kg. 3 seed potato treatment 3.1 selected seed potato in the planting before 20-30 d (the region generally around mid-January). Seed potato selection, select disease-free, no wounds, smooth skin, skin color fresh, bud eyes, uniform size and in line with the characteristics of varieties of seed potatoes, eliminating deformed, cracked, bud eye necrosis, with disease spots of the block I 2l. per 667 m2 need to use about 120 kg of seed potatoes. seed teeth cut in one or two a seed as well, so it will be very high-yield. 3.2 Seed Potato Cutting Sprouting Sprouting before sowing can promote early emergence, increase field growth period, increase the yield of the field growth period, and improve the quality of the seed potato, the seed potato, the seed potato and the seed potato. The seed tuber is not only a good seed tuber, but also a good seed tuber, which can increase the growth period in the field and improve the yield. Sunbeds, cellars, greenhouses can be used as germination sites. The seed potatoes obtained after screening are placed in a light-avoiding environment at 20℃ for warm seed germination. When the sprout is exposed about 0.5 em when cutting blocks, according to the order of the buds. Starting from the end of the potato, cut in spiral shape according to the order of the buds. Finally, cut the top in half. Ensure that each cut block with l ~ 2 top strong buds, cut block to be uniform, generally each piece of seed potato weight to maintain about 25 g, cut block with the knife to use 75% alcohol for strict sterilization.3.3 Pharmaceutical treatment will be cut into the block of 0.01% boric acid or 500 times 50% carbendazim solution, soak for 5 ~ 10 min and then fished out of the drained and shade-dried. Move the dried potatoes to a warm sunny place in the sun for 3 to 5 d. Maintain a temperature of about 15 ℃. Let the young shoots green and strong. 4 timely sowing 4.1 planting period, purple potato young shoots in the temperature over 5 ℃ began to sprout. 18 ℃ when the growth of strong, rapid. In general. When 10 cm ground temperature stabilized through 5 ℃ can be sown. Tianjin area suitable land cultivation mode planting period is generally in mid-late March and early April. Too early. Seedlings are susceptible to frost damage, too late can not be first to market, affecting the planting efficiency. 4.2 Raised bed mulching double row cultivation using raised bed mulching double row cultivation. Can improve the ground temperature 3-5 ℃, early planting period of about 15 d, at the same time for the purple potato normal growth to create a healthy, loose environment, but also conducive to artificial or mechanical harvest. In accordance with the row spacing 100 em made 20 cm high, 70 cm wide, the middle of the slightly high turtleback bed, harrowing and leveling per 667 m2 with ethofumesate 100-150 g of water 40-50 kg spray, prevention and control of weeds in the field: the use of a width of 90 cm, a thickness of 0.008 mm mulch cover, mulch film to be strict. Every 2-3 m horizontal pressure of a soil belt, to prevent windy uncovering the film. Mulching baking border 3-5 d can be planted. 4.3 reasonable dense planting, purple potato should be sparsely planted, using double rows of cultivation. Row spacing 40 em, plant spacing 33 cm, every 667 m2 stay seedlings about 4,000. When planting according to the size of the plant spacing with a hole opener to play 8-10 cm deep planting holes. Then the seed potato sprouting upwards, and seal the film hole with fine soil. 5 field management purple potato flush seedling after only about 65 d of growth time, therefore, field management to highlight a "early" word. Production should master the principle of promoting and controlling. Technical management should be timely, early plowing, early fertilizer, early watering. Promote roots, promote trees and promote early hair. After flowering, according to the weather, soil moisture, plant growth discretionary fertilizer, small water, watering, promote tree attack potato, potato control tree, to achieve coordinated growth. Both to prevent early plant failure, but also to control the late stem and leaf growth. 5.1 seedling seedling, plowing and weed control after planting, to maintain soil moisture and stabilize the ground temperature. When the seedlings come out of the ground, timely check seedlings, from sowing to sealing the ridge before 3-4 times between the film shallow plowing, so that the soil to maintain loose, improve the ground temperature. At the same time to eliminate weeds between the ridges, cultivate field seedlings. 5.2 fertilizer in the application of sufficient fertilizer under the premise of the field flush seedlings, in order to promote the early emergence of young seedlings. Can foliar spray 0.3% potassium dihydrogen phosphate solution 2-3 times. Depending on the growth of seedlings, in the regimentation period to the plant before sealing the ridge, combined with irrigation per 667 m2 of urea 15-20 kg. 5.3 Removal of buds buds began to expand, flowers into the rapid expansion period. At this time, flower buds should be removed in a timely manner to reduce nutrient consumption and promote the development of potatoes. 5.4 Scientific chemical control in order to prevent plant growth, collapse, and improve the rate of large and medium-sized potatoes. Field purple potato plant height of 15 ~ 20 cm with 5% polyconazole 15 g of water 30 kg spray, the effect is very good. 5.5 water management before bud, mainly by soil moisture for the plant to provide water. Master not drought not water; bud period, purple potato into the tuber expansion period. Should be timely watering, keep the soil moist, generally about every 15 d watering 1 time. Irrigation, pay attention not to let the water over the back of the ridge caused by soil crusting. In order to improve yield and improve quality, purple potato growth should be appropriate late water control, 10 d before harvest to stop watering, to prevent over-wet soil caused by tuber morbidity to reduce storage resistance.6 timely harvesting of potato plants most of the stems and leaves from green to yellow and gradually withered. Stolon shrinkage is easy to detach from the tuber is the sign of its maturity, this time should be harvested in time to avoid underground pest damage. Harvest should try to avoid rainy weather. Choose sunny days and low soil moisture, try to avoid mechanical damage. Improve the commerciality, take the field grading packaging, effectively improve economic efficiency.7 pest control purple potato fertility period prone to late blight and virus disease. Prevention and control of late blight can be used DuPont Klue, agro-streptomycin or diclofenac and other agents to carry out 3-4 times of foliar spraying: after the flowering period with 50% carbendazim or 40% ethylphosphine aluminum 500 times liquid spray, every 7 ~ 10 d spray 1 time. Spray 2-3 times. Prevention and control of virus disease can be 20% virus A 500 times liquid or 1.5% phytophthora 800 times liquid spray. The main pests are grubs, mole crickets, tigers, aphids and ladybugs, the implementation of pollution-free control technology. Use frequency vibration insecticide traps to kill adults, with 50% phoxim emulsion 1,000 times liquid or 25% trichlorfon emulsion 500 times liquid spray or irrigation to kill, control tigers, grubs and other subterranean pests; with 50% phoxim emulsion l,000 times liquid or 10% imidacloprid 2,500 times liquid spray to prevent and control the aphids and twenty-eight star ladybug beetles.