Detailed Explanation of Purple Sweet Potato Seedling Raising Techniques: Master the Methods to Grow Strong Seedlings

Purple sweet potato is a plant of the same type as sweet potato, and it is also a major food crop in our country. The nutritional value of purple sweet potato is higher than that of sweet potato, so the market for purple sweet potato is now gradually approaching that of sweet potato, and there is even a trend of it surpassing sweet potato. Therefore, the planting area of purple sweet potato is also growing larger and larger, and the most important thing in growing purple sweet potato is to do a good job in seedling raising. Today, the editor brings you the seedling raising techniques for purple sweet potato. Let's take a look below!

1. Seedbed preparation

The seedling raising time for purple sweet potato is generally in spring each year. First, a good seedbed must be selected and the seedbed preparation work done well. The seedbed should be established on sandy soil in a place that is sheltered from the wind, has sufficient light, strong permeability and sufficient fertility. Control the area of the seedbed according to the planting area, then do a good job in land preparation for the seedbed, plow the soil deep by about 25 cm, carry out disinfection, and eliminate pathogens in the soil. Then prepare base fertilizer according to the fertility of the soil, mainly farmyard manure, to supplement the nutrient elements lacking in the soil.

2. Selection of seed potatoes

The selection of seed potatoes is very important. For purple sweet potatoes kept for seed, the harvest time should be delayed to ensure that the tubers are fully mature. Then after digging out the seed potatoes, carry out the work of sun-drying the seeds, with the time controlled at about one day. Dry the moisture of the seed potatoes and eliminate pathogens. If there is no rush to sow, it is best to store the seed potatoes in a cellar, and try not to store them in strings, to prevent injury that reduces the germination ability of the seed potatoes. When the temperature gradually rises back to about 15°C, seedling raising can begin, and the seed potatoes can be properly planted into the seedling bed.

3. Arranging the seed potatoes

When the temperature reaches the stage suitable for seedling raising, arrange the prepared seed potatoes neatly on the seedbed. Note that the quantity and density should be well controlled. When arranging, place the backs of the tubers facing upward, maintain a certain tilt, and keep the head and tail directions the same. Then apply sufficient farmyard manure, spread it comprehensively and evenly over the seed potatoes, and then cover with about 2 cm of fine soil. Then cover well with plastic film, compact the soil, and improve the germination rate of the seed potatoes. When sowing seed potatoes, they must not be placed randomly, otherwise some seed potatoes will fail to germinate.

4. Seedbed management

After sowing, pay attention to doing a good job in regulating temperature and humidity, and strengthen ventilation. Before emergence, because the temperature difference between day and night in spring is relatively large, attention should be paid to covering with grass to improve heat preservation capacity and keep the soil temperature at about 30°C. Then after the seedlings emerge, the temperature can be appropriately lowered to prevent excessively high temperatures from burning the seedlings. When the temperature exceeds 30°C, ventilation work should be done in time. Before emergence, attention should be paid to watering as little as possible. If it is really too dry, appropriate spray watering can be carried out.

The above is a brief introduction to the seedling raising techniques for purple sweet potato. The seedling raising work for purple sweet potato is very important, as it directly affects the yield and has an impact on planting benefits, so everyone must pay more attention. That is all for today's introduction. This article is for reference only, and I hope it can be helpful to everyone!