2. sow. Potatoes are planted in spring and harvested in autumn, which can be harvested for many years after one year of cultivation. During cultivation, first, the soil should be carefully prepared, and fully decomposed farm manure or organic matter should be applied as base fertilizer per mu, and other fertilizers should be properly matched with some nitrogen and phosphorus fertilizers, generally about 40 ~ 50 kg each. Then, after deep ploughing, the fertilizer and the soil are mixed evenly, and the ridge is opened, generally before the Grain Rain, and the row spacing is controlled to be about 25-30 cm, and gradually10 ~15 cm, and about 30 kg of seeds are used per mu.
3. Field management. It is not advisable to water after sowing, so as not to cause soil hardening and affect the normal emergence of seedlings. Generally, seedlings will emerge within one week after sowing. When watering at seedling stage, a small amount of nitrogen fertilizer should be applied to promote the growth of buds. At the same time, it is necessary to do a good job of weeding in intertillage, and the intertillage should be shallow to avoid damaging roots. Weeding should be done frequently to prevent weeds and seedlings from competing for water and fertilizer, which is not conducive to the growth of buds. When the new seedlings grow to about 10 cm, they will produce purplish red flowers, which will last for a long time until autumn, and at the same time start to branch and pack. When it grows to about 30 cm, underground tubers will be produced, and expanded spiral tubers will be produced at the top of fibrous roots.
4. Dig and keep the seeds. In winter, when the temperature is low and cold, the stems and leaves on the ground will wither gradually. At this time, you can dig the tubers, dig a soil pit 30 cm deep after digging, put the tubers into storage, and cover the pits with sand. Individual tubers can be left in the ground, dug up before germination next year, planted or used, and the taste is also fresh, tender, crisp and delicious.