1. Grasp the temperature during the planting season. Sweet potatoes like light, sufficient light is conducive to photosynthesis, and the yield of roots will be high. The temperature of 22 to 23 degrees Celsius is the most suitable for the expansion of sweet potato roots. The minimum temperature for the expansion of sweet potato roots cannot be lower than 16 degrees Celsius, so in late March or April In the first ten days of the month, when the temperature stabilizes at 15 degrees Celsius, it is most suitable for planting spring sweet potatoes. Don't plant it too late. This will shorten the growth cycle of sweet potatoes, shorten the time for sweet potato roots to swell, lower the yield, and worsen the quality. Planting for one day every night can reduce the yield by about 1% per mu.
2. Do a good job of management before planting. Before planting, deep plow the soil and whiten it, apply a sufficient amount of 1000 kg to 2500 kg of base fertilizer to make the soil loose and fertile, and apply 20 to 30 kg of special compound fertilizer for sweet potatoes to promote growth. Ridging and trimming, insert the sweet potato seedlings on the Longshang, cover the soil, pay attention to fertilizer not to touch the sweet potato seedlings to prevent damage to the seedlings.
3. Plastic film coverage. The mulch film can increase the temperature and protect the moisture. If the temperature is low, cover the film in time to protect the sweet potato seedlings from freezing damage.
4. Replenish fertilizer and water in time. After the sweet potato seedlings are planted, they need to be watered in time to prevent the sweet potato seedlings from dying. If there is a dry season, small water drip irrigation should be helpful for the sweet potato seedlings to take root and survive. The growth of the stems and leaves of sweet potato planting speeds up and requires a lot of fertilizer and water. Organic fertilizer and 5 to 10 kilograms of urea should be applied. At the same time, it needs to cultivate the soil once, loosen the soil to protect the moisture, and pull out the large grass after the ridge is closed.
5. Pick top and vine in time. When the main stems and leaves of sweet potatoes grow to more than 50 cm, they must be topped in time to prevent the vines from growing out and consuming nutrients; in the rainy season, the vines are easy to grow adventitious roots, dispersing the nutrients of the stems and leaves, and vine lifting can inhibit the growth of adventitious roots. , Make the nutrient concentrated supply for the growth of tubers.
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