Purple potato is rich in selenium and iron, and is known as the “anti-cancer kingâ€. The healthy and nutritious purple potato has broad sales prospects. Many farmers do not know how to grow and harvest purple sweets. Tell us about the key points of planting management of purple potatoes.
Seed
There are many kinds of purple sweet potato. The purple sweet potato can be divided into fresh food type and processing type according to the use. The fresh food type has good taste, moderate pigment content, good disease resistance, beautiful potato type, and high processing color. A species with good disease resistance and high dry rate.
2. Nursery
When the temperature reaches 15 degrees in mid-February, it is possible to raise seedlings, first make seedbeds, and select soils with leeward sun, high-altitude, soil permeability, and inorganic-rich soil. The seeds are placed horizontally on the seedbed, usually 15 kg of seed potatoes per square meter, the tail is muddy, the head and tail targets are different, the spacing is 5 cm, the cover is 2 cm thick, and the soil is sprayed with a sprayer. Cover the mulch film, cover the sky film, moisturize and keep warm, and pour the soil in real time. When the bud seedling grows to more than 20 cm, it can be cut into the field.
3. Land plot
Although purple sweet potato is a genus of potato, because the development habit of purple sweet potato is different from that of its native potato, the selection of different soils has an inevitable effect on the quality of purple sweet potato products. Black soil, sandy soil and yellow soil are better, and the position is slightly higher. Chaoyang is better. It is important to select the quality and yield of the site and purple potato. Generally, the selection of the site is fat, the soil with higher inorganic quality is better, and the ridge is deeply dug. The ridge planting is better, which is conducive to expanding the root movement and facilitating irrigation and drainage.
4. Management
Purple sweet potato is a high-yield and high-efficiency crop, which requires more fertilizer, plus ridge planting, convenient topdressing, and soil-fat plots. It is most labor-saving to apply base fertilizer at one time. Generally, 40 to 50 tons of excellent inorganic fertilizers are applied, and 35 to 50 kilograms of nitrogen, phosphorus, potassium and compound fertilizers are applied. The inorganic fertilizer is applied before the whole cultivation, and the compound fertilizer is used as the core fertilizer. In the early stage, you should pay attention to the investigation of seedlings and seedlings. In the medium term, you should raise the vine in real time. Don't disturb the target when you mention it, and put it back in the same place. Because the development of purple potato vines is prosperous, there are more roots in the festival, and Titan is the key to strengthening the yield of purple potatoes.
5. Harvesting
The request for purple sweet potato seeding is to be sown in the middle and late October. For the fresh-type purple sweet potato to be retired early in November, it must be finished before the frosting. In the early stage of storage, it is necessary to pay attention to the ventilating and dehumidification.
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