What weather is suitable for transplanting sweet potato seedlings? What should I pay attention to?

Sweet potato is divided into four varieties by color: red sweet potato, white sweet potato, yellow sweet potato and purple sweet potato. The most common sweet potato is red-hearted sweet potato. The suitable temperature of Yan Shu No.25 seed germination is 18℃~22℃, the suitable temperature of seedling raising after emergence is 20℃~25℃, and the suitable temperature of cutting seedling raising is 65438+.

Transplanting sweet potato seedlings in sunny days, due to the dry air, the evaporation of soil water is large, which is easy to cause the sweet potato seedlings to wither due to insufficient water absorption or large water loss in the stems. Therefore, after the cutting is completed, water it in time. According to the biological characteristics of sweet potato, the soil temperature at a depth of 5 cm should be stable above 65438 06℃. Although lower temperature can slow down leaf evaporation, it is not conducive to hair roots; Although high temperature is beneficial to rooting, leaf evaporation is accelerated and leaves are prone to wilting.

If the weather is bad when the sweet potato seedlings are harvested, they can be placed in a cool, ventilated and humid place 1-2 days. When the lower incision is healed and there are micro-root points on the nodes, they should be cut in the afternoon and watered with a little water after cutting. Generally speaking, the adventitious roots on nodes are few and bare. After transplanting, the roots will grow, the longer the better. When the soil is wet, the transplanted sweet potato seedlings will take root, and the seedlings should be planted in the southeast downwind direction to prevent the wind from scratching the seedlings. It is advisable to bury the soil 1.5-2 inches deep and expose 3-4 leaves on the ground.

The cultivation of sweet potato seedlings must be carried out after rain, and it is after moderate rain, because the land is completely soaked by rain after moderate rain. In order to ensure the sufficient water requirement of sweet potato seedlings and improve the survival rate. Generally, sweet potato seedlings can be cut in sunny mornings and before 10, or in the evening. The optimum depth of potato seedlings is 3 ~ 5cm, which can be slightly shallow in clay or soil and slightly deep in sandy soil or soil, depending on local specific conditions.