Sweet potato seedlings generally start at the end of the first month, and the seedling period is about one and a half months to 50 days. Sweet potato seedlings are divided into modern and traditional rain seeds.
First of all, modern seedlings are raised in plastic greenhouses, which are hugged into a long furrow with a width of more than one meter like planting crops, 40 centimeters deep, and a layer of virtual soil is cushioned at the bottom, and then sweet potatoes are placed on it, and then covered with soil on the top.
The outside is a plastic greenhouse, using the role of sunlight, the temperature in the shed is maintained at about 20 degrees, and the seedlings are seedlings after more than a month.
There are three methods of traditional seedling raising methods, namely: hot pool, cool pond, and earth pond. One Hot pool: at the beginning of February of the lunar calendar, the pond began to build a pond to mix manure, the pond is built with bricks as well, the bottom of the pool is left with a fire road, the coal fire is built in front of the pool, and there is a chimney behind the pond to smoke; the dung is based on cow dung as the standard, broken and splashed with dung and stirred evenly, the dry humidity is plucked into a ball by hand and thrown away, the bottom of the pool is covered with bottom dung, and then the sweet potato is erected, the tip is close one by one, the pool is filled in turn, the stirred manure is covered with four centimeters, the thermometer is inserted on the top of the pool, the plastic film can be covered, and then the fire is burned, the temperature is kept at about 20 degrees, so that the seedlings emerge in a month, and can be planted in 35 days。
2. Cool pool: In addition to not burning the fire, the rest is the same as the above process, and the seedlings will emerge after one and a half months.
3. Earth pond: the same as the cool pond, but the bottom and top of the pond are all soil, no manure, and the cool pond seedlings are raised at the end of February of the lunar calendar, which is suitable for late planting and wheat stubble planting sweet potatoes. That's it for my introduction, I hope it will be helpful to you.