Sweet potato is a warm-loving crop, native to the tropics, sensitive to low temperatures and intolerant to frost. The temperature during the peak period cannot be lower than 21 degrees Celsius, and the optimal growth temperature is around 25 degrees Celsius. Growth slows down when it exceeds 35 degrees Celsius, and stagnates when it is below 15 degrees Celsius. Plants below 10 degrees Celsius will be damaged by low temperature and die.

After the young shoots are unearthed, the appropriate temperature is around 25-30 degrees Celsius. If it is too low, the growth will be slow, and if it is too high, the tissue will be tender, the seedlings will be slender, and the seedlings will be of poor quality. When transplanting into the field, it is best to ensure that the soil temperature of 5 cm is stable above 16 degrees Celsius, and the air temperature is 18-20 degrees Celsius; the optimal soil temperature during the root expansion period is 22-23 degrees Celsius.

Sweet potato is a light-loving short-day crop. When there is sufficient light, it can increase the intensity of photosynthesis and increase dry matter accumulation, which is beneficial to the formation and expansion of root tubers. When the light intensity is insufficient, the photosynthesis of sweet potato seedlings is weakened and the accumulation of organic matter is reduced.

Extended information

Notes:

1. After transplanting to the field, water the roots in time, check the seedlings in time to fill the gaps and replant; Water in time to facilitate survival.

2. Timely cultivating, weeding, and loosening the soil. From about 10 days after planting to before sealing the ridges, it is generally necessary to combine watering with cultivating and loosening the soil 2-3 times to promote growth and rooting.