The sweet potatoes have sprouted. Put the sweet potato seedlings into the water. Put some water in the bowl, about 3 cm or less, depending on the number of sweet potato seedlings. Place the sweet potato sprouts in a bowl so that their bases are submerged in the water. After a few days, roots grow from the bottom. Add clean water once a day to allow the seedlings to grow healthily. After 2-3 days, the sweet potatoes should have roots. Pour out the water in the bowl, take out the sweet potato seedlings and plant them.

1. Seedbed selection

Choose loose soil with low groundwater level, easy drainage, shelter from wind and sunshine, and has not been planted with sweet potatoes for 3-5 years as a seedbed. Plow and rake it before raising seedlings. , whole and detailed.

2. Seedbed production

The seedbed is generally made about 1.3m wide to facilitate covering with film. The length depends on the terrain and needs (generally about 10m2 of seedbed per mu of field is required), and the depth 40-50cm (use manure, crops, and straw as heat-making materials), and the bottom of the bed is dug into a turtle-back shape.

3. Fill the hot stuffs

After digging the pit, place fresh pig manure, crop straw and other hot stuffs in layers, with a thickness of about 50cm, such as straw. If the proportion is too large, you can pour some fresh human feces and urine to promote fermentation. Then spread 5-8cm thick loam on the hot stuff. If you do not dig a pit and make a bed on flat ground, the surroundings should be sealed with mud to prevent heat dissipation.

4. Timely planting

For hotbed seedlings, you can choose to sow about one and a half months before planting. For open-field seedlings, the soil temperature must be above 14°C before sowing. Based on past experience, Seedling cultivation in hotbeds in our city is usually carried out in early March, and seedling cultivation in the open field is postponed for 10-15 days. Choose healthy potato tubers of medium size (150-220 grams) with bright skin and no spots. The seed quantity per mu (field) is 75-90 kg, the seeding density is 13cm×16cm, and the seeding volume per square meter is 22.5-25. Kilogram. Disinfect before sowing. Soak the seed potatoes in 70% thiophanate methyl 700 times or 25% carbendazim powder 500 times for 10 minutes. When arranging the seeds, place the potato pieces with their heads facing up and their bottoms facing down. The rows of large potatoes should be deep and the rows of small potatoes should be shallow. After planting, cover the soil with soil. The soil should not be too thick. As long as the seed potatoes are not exposed, they can be covered with soil and covered with low arches of mulch film to keep warm. ?