Purple potato is rich in selenium and anthocyanins and the nutrients of ordinary sweet potatoes. In recent years, because of the popular saying that purple sweet potato can prevent cancer, it is very popular in domestic and foreign markets, and the prospect of purple potato cultivation is very broad. The purple potato planting technology is now shared as follows:
First, the selection of good varieties
Choose purple potato varieties with early maturity, single potato, uniform potato size, beautiful potato shape, smooth skin and good taste.
Second, nursery management
1. Choose a disease-free seed potato, choose a plot with a good ventilation and good fertility, and manage it easily. The lobe is 150 cm wide and 16-25 cm high. The used organic fertilizer is used as the base fertilizer and the bed surface is leveled. ditch.
2, generally in the middle and late March, the seedlings can also be raised in time. When arranging, the potato chips should be placed obliquely, the head and tail are in the same direction, the top and the tail are downward, and the potato pieces are separated by 3 to 5 cm. After the arrangement, the diluted manure water is poured and the soil is covered with 3 cm and then the cover film is placed.
3. Keep the bed soil moist before the emergence of the seedling, the bed temperature is 28 °C ~ 30 °C; the bed temperature after emergence is about 25 °C. If the temperature inside the film exceeds 35 ° C, ventilation should be provided. After the seedlings are germinated, the human excrement is poured; when the seedling height is 10-13 cm, the human feces or compound fertilizer plus water is applied for the second time; the potato seedlings are more than 15 cm long, and when there are 5-7 large leaves, the seedlings can be planted, each Cut a seedling, water and fertilize once.
Third, field management
1. Site preparation
It is required to carry out deep ploughing on the sunny day. It is cultivated in a single row with wide grooves or narrow grooves, with a wide groove distance of 110-120 cm, a narrow groove distance of 75-80 cm, and a groove height of 20-25 cm. When making a ditch, apply 1000 kg of decomposed organic fertilizer per acre to the ditch heart, and then do straight and do the flat surface.
2, cutting
Cuttings generally begin in mid-May, and the mulch cover can be advanced early. Use shallow flat or oblique insertion, wide groove double row spacing 25 ~ 30 cm or narrow groove single row spacing 20 ~ 25 cm, cutting 3500 ~ 4000 per acre. Immediately after cutting into alive, check the seedlings and make up the seedlings.
3, cultivating weeding and fertilizing
The first cultivating and weeding is carried out when the potato seedlings start to extend the vine, and then every 1-10 days, once every 2-3 times. In the middle and late growth period, the sun is dried after the dew is dry, and the number and interval are taken to prevent the occurrence of adventitious roots.
Fourth, pest control
Virus disease - seed potato should choose disease-free seed potato, and the diseased plant is found in the seedbed. Black spot disease, purple fringe disease prevention and control method is strictly prohibited to leave the disease on the plot, the control method of Spodoptera litura is in the late June, using natural detoxification liquid spray, the control method of sweet potato leaf beet is after the potato seedling cutting 30 Spray with matrine solution.
V. Harvest
The harvest time should be determined according to the local climate, variety characteristics and market demand. Early and mid-maturing varieties can be harvested at the end of August and early September, and late-maturing varieties can be harvested in mid-October. The latest harvest period is prohibited from harvesting in rainy days before the frost is reduced. The harvesting process should be lightly digging, lightly loaded, lightly transported, and lightly unloaded to prevent the potato skin and potato chips from being bruised.
The prospect of the purple potato market is better than that of sweet potatoes, so the high-quality purple potatoes grown by the farmers are not sold out!
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