After the sprouts are unearthed, the temperature should be about 25-30 degrees Celsius. Too low will lead to slow growth, while too high will lead to delicate tissues, slender seedlings and poor seedling quality. When transplanting to the field, it is best to ensure that the soil temperature of 5 cm is stable above 16 degrees Celsius and the temperature is 18-20 degrees Celsius. The optimum soil temperature during root swelling is 22-23 degrees Celsius.
Sweet potato is a short-day crop that likes light. When the light is sufficient, it can improve the intensity of photosynthesis and increase the accumulation of dry matter, which is beneficial to the formation and expansion of root blocks. When the light and intensity were insufficient, the photosynthesis of sweet potato seedlings weakened and the accumulation of organic matter decreased.
Extended data
Precautions:
1, after transplanting into the field, water the roots in time, check the seedlings to make up for the lack, and replant in time; After replanting, water it in time to facilitate survival.
2, timely intertillage, weeding, loosening the soil, from about 10 days after planting to before closing the ridge, it is generally better to combine intertillage with watering for 2-3 times to promote growth and rooting.