Black potatoes and purple potatoes are a kind of thing, purple potatoes, purple potatoes Alias black potatoes/purple potatoes/black potatoes

Black potatoes potato shape is a long oval, the bud eye is smaller. The skin of the fruit is black-purple, black and shiny, glossy. Fruit flesh is dark purple, good appearance, color temptation. The starch content of the pulp is as high as 13-15%, with better taste and excellent quality.

Characteristics

Saplings are erect, bushy, tall and strong. Plant height 60 cm, stem thickness 1.37 cm, stem dark purple

Black potato growth

, cross-section three-angled type. The main stem is well developed and less branched. Leaf color dark green, petiole purple, corolla purple, petals dark purple. Potato body long oval, smooth skin, black purple, black and shiny, glossy. Potato flesh dark purple, dense and tight. Appearance of color seductive. The starch content is 13-15%, and the flavor is good. Bud eye is shallow, and the number of bud eye is medium. Concentration of potatoes, single plant 6-8 potatoes, single potato weight 120-300 grams. Full-life span of 90 days, is a medium-early maturity varieties, drought resistance, cold resistance, adaptability, potato storage resistance. Resistant to early blight, late blight, ring rot, black shin disease, virus disease. General yield 1000-1500 kilograms per mu. Suitable for cultivation in the main potato producing areas and secondary production areas of the country, with promising prospects for development.

Main value

Purple potato is a collection of edible, nutritional, health care, ornamental in one of the new varieties of colorful potato, in addition to fine, fragrant, noodle excellent quality, there is the color of the unique appearance of the bright, cancer prevention, beauty and other effects. Purple potato in the domestic cultivation area is still small, the price per kilogram in 8-12 yuan, is 6-8 times the ordinary potato, popular domestic and foreign markets, the next few years its economic benefits can be considerable, very development prospects.

Purple potato is a variant of the traditional potato. Purple potato is not sensitive to light. So it is made into fried potato chips after no longer change color. This is very attractive to girls. Purple potatoes are purple because there are a lot of anthocyanins in the body. The anthocyanin has some anti-aging function.

Purple potatoes are rich in nutrients, per 100 grams of protein 2.3 grams, 0.1 grams of fat, carbohydrates 16.5 grams, calcium 11 mg, iron 1.2 mg, phosphorus 64 milligrams, potassium 342 milligrams, magnesium 22.9 milligrams, carotenoids 0.01 milligrams, 0.1 milligrams of thiamine, 0.03 milligrams of riboflavin, niacin 0.4 milligrams of antiscorbutic acid 16 milligrams, Anthocyanin 100 mg. Purple potatoes can be used as a side dish as well as a specialty dish. Stir fry, deep fry, burn, boil, simmer, steam, fry and so on can be made into 500 kinds of flavorful, colorful food. In addition, it is rich in antioxidant substances, high temperature frying without adding coloring can still maintain the original natural color.

Cultivation Technology Editor

Model Characteristics

Selecting good seeds, deep loosening of the ground, narrow-monopoly cultivation, reasonable and dense planting, soil testing and fertilizer application, and water-saving irrigation.

Purple potato cultivation

1, choose the land Select loose soil, good drainage, deep turning foundation of the plot. Avoid black potatoes, sugar beets, radishes, cabbage, watermelon heavy crop and the previous application of long residual herbicide plots.

2, land preparation Deep-turned 25 ~ 30 cm, voltaic turn over after harrowing importance of the ridge suppression or not, to reach the state of sowing.

3, before sowing preparation

(1) varieties and seed potato selection. Select disease resistance, high quality, high yield, strong resistance, suitable for local cultivation conditions, good commercialization of various types of special varieties.

(2) Sprouting. 15 ~ 30 days before sowing will be refrigerated or by physical and chemical methods to artificially lift the dormant seed potatoes placed in 15 ~ 20 ℃, the darkness of the flat 2 ~ 3 layers for germination. When the buds grow to 0.5 ~ 1 cm, the seed potato is gradually exposed to diffused light to strengthen the buds, turning every 5 days. Avoid direct sunlight, rain and frost during germination.

(3) Preparation before cutting. Calculate the amount of seed potato. Before cutting, it is best to prepare the same size cutting knife, sterilized mat board and disinfectant (e.g. bleach, every 20 hectares of plot needs about 50 kg of bleach, bleach: water = 1:100). Cutting principle, cut block of uniform size, generally in 40-50 grams; cutting method, 35-60 grams of seed potatoes for whole potato cultivation; 70-120 grams cut a cut, each block for a cut; 100-240 grams cut two cuts, cut block for one, two cuts; 210-480 grams need to cut three cuts, four cuts, cuts for two, three, four, cut blocks are processed after cutting. Cut tubers are mixed with a coating agent or fungicide (e.g., metribuzin, carbendazim, kelu, ankimanganese zinc, mefenoxam, etc.) (540-600 g/ton of tubers) plus gypsum powder (12-15 kg/ton of tubers), and then stored in suitable conditions (10-12.5 ℃, high humidity, well ventilated) for 2-3 days, the potato pile should not exceed 1.5 m, to ensure that the cut pieces are not exposed to the dry sunshine Under the sun.

4, sowing

(1) Sowing time. When the soil depth of 15 centimeters, the ground temperature to maintain 7 ℃ above the duration of 3 days, can be sown.

(2) Sowing depth. Sowing depth is 6 to 10 centimeters (from the upper part of the tuber to the surface plane).

(3) Row spacing and plant spacing. Row spacing is 65 to 70 centimeters and plant spacing is 20 to 26 centimeters.

5, fertilization Adhere to the soil fertilization. According to soil fertility, determine the appropriate amount of fertilizer and fertilization methods. More than 70% of the total amount of nitrogen fertilizer and most of the phosphorus and potassium fertilizer can be basal application. Farmer's fertilizer and chemical fertilizer mixed application, advocate the application of farmyard manure. Farmer's fertilizer combined with ploughing and tilling of the ground application, and the plough layer is fully mixed, chemical fertilizer as seed fertilizer, sowing furrow application. Appropriate supplementation of medium and trace elements. Each production of 1000 kg of black potatoes need fertilizer: nitrogen fertilizer (N) 5 to 6 kg, phosphate fertilizer (P2O5) 1 to 3 kg, potash (K2O) 12 to 13 kg.

6, field management

(1) Plowing and weeding. After the seedling is complete, timely plowing and weeding, the last plowing and weeding before sealing the ridge.

(2) Fertilizer. Depending on the seedling situation, timely fertilization. Fertilizer method can be ditch, point or foliar spraying, timely irrigation or spray water after application.

(3) cultivate soil. Generally combined with the plow weeding soil 2 to 3 times. The first shallow soil cultivation after the first seedlings, high soil cultivation during the bud stage, the last soil cultivation before sealing, cultivated into a wide and high ridge.

(4) irrigation and drainage. Throughout the growing period soil field water holding capacity is maintained at 60 to 80%. Seedling should not be irrigated before, tuber formation period in a timely and appropriate amount of watering, tuber expansion period can not lack of water. Avoid heavy watering when watering. In areas or seasons with more rain, timely drainage, the field can not have stagnant water. Stop watering 7 to 10 days before harvest.

7, pest control

(1) disease control. Pre-control of filamentous ulcer, early blight, mid and late prevention of late blight and so on. Pay attention to field monitoring, when the field humidity, temperature between 10 to 25 ℃, keep 48 hours, pay attention to the occurrence of late blight, found in the center of the diseased plant, immediately pull out, with closed containers to take the diseased plant out of the ground and buried y, to be sprayed around the diseased plant 3 meters.

Late blight should adhere to the prevention of the main original, before the late blight occurs, the use of Chlorothalonil, Dasheng protection agent for prevention, when late blight occurs should be used alternately with Anchor Manganese Zinc, Kelu, kill alum, and other systemic killers.

(2) Control of pests. Apply Silex and Lexapro insecticides when sowing to prevent underground pests. Check the field flea beetle and tsubaki weevil when the seedlings emerge, once found, immediately spray high-performance deltamethrin, kungfu, field insecticide class of insecticides. early July attention to the prevention of aphids and grass borers, after the occurrence of the alternating spraying of aktivirus, anti-budweed, kungfu, high-performance deltamethrin. mid- and late-August, plus the application of aktivirus. end of August and early September, the occurrence of the nocturnal moth pests, sprayed immediately with Wanling or Ampacid.

8, harvesting Timely harvesting, harvesting before if the plant is not naturally dead, can be about 10 days in advance to kill seedlings. After harvest, the tubers avoid exposure to the sun, rain, frost and long exposure to the sun and turn green.