Yu Zi's potato pieces are rotating, like carrots, a string of 5-6. First of all, choose the seeds. Yu Zi, who is ready to breed, should be kept on the ground for a few more days to make the potato pieces mature. After digging it out, it will take two days in the sun to kill the germs. There is no need to separate them and store them in strings to reduce the damage of potato chips. Generally, cellar insulation technology is used to ensure the storage quality of seed potatoes.
2, timely seedling raising
In mid-February, when the temperature reaches about 15 degrees, you can go out to raise seedlings. Prepare the seedbed first, arrange the seeds horizontally on the seedbed with a row spacing of about 5 cm, cover them with fine soil, spray them with a sprayer, cover them with plastic film, cover them with a canopy, and keep them moist and warm. When the seedlings grow to more than 20 cm, they can be cut into the ground.
3. Suitable environment
The optimum growth temperature of purple potato seedlings is 28-25 degrees, and the optimum growth temperature of root tuber is 22-24 degrees. Purple sweet potato, like common sweet potato, needs short sunshine, and the light intensity is large and sufficient, and the field water capacity reaches 60%, which is beneficial to improve the yield of purple sweet potato.
4, pest control
Biological agent Bacillus thuringiensis is also used to control diseases and pests of purple sweet potato. The plant growth regulator can be brassinolide, which is a new green plant growth regulator and can be sprayed in advance to enhance the disease resistance of purple sweet potato and prevent the occurrence of diseases.
5. Harvest and storage
Seed purple sweet potato should be harvested in the middle and late October of 10 10, and fresh purple sweet potato should be delayed until the early October of1kloc-0/65438, and it must be harvested before frosting.
Before storage, the potato cellar should be cleaned, the topsoil should be removed and disinfected; Sun-dried the purple sweet potato 1 ~ 2 days before entering the cellar to heal the wound; When storing, pay attention to ventilation and moisture reduction in the early stage, and pay attention to heat preservation and moisture preservation in the later stage.
Extended data:
Matters needing attention in planting purple sweet potato:
1, planting time of purple potato
Purple sweet potato is usually planted in mid-February. In mid-February, when the temperature reaches about 15 degrees, you can go out to raise seedlings. Prepare the seedbed first, arrange the seeds horizontally on the seedbed with a row spacing of about 5 cm, cover them with fine soil, spray them with a sprayer, cover them with plastic film, cover them with a canopy, and keep them moist and warm. When the seedlings grow to more than 20 cm, they can be cut into the ground.
Seed purple sweet potato should be harvested in the middle and late October of 10 10, and fresh purple sweet potato should be delayed until the early October of1kloc-0/65438, and it must be harvested before frosting. Before storage, the potato cellar should be cleaned, the topsoil removed and disinfected. The purple sweet potato should be aired 1 ~ 2 days before entering the cellar to heal the wound. When storing, pay attention to ventilation and moisture reduction in the early stage, and pay attention to heat preservation and moisture preservation in the later stage.
2. Planting environment of purple sweet potato
Purple sweet potato likes warm climate. The suitable growth temperature of stems and leaves is 18 ~ 25℃, and the growth will stop when it is lower than 15℃. The optimum growth temperature of root tuber is 22 ~ 24℃, and it will stop swelling when it is lower than 20℃. It is a cash crop in short-day agricultural land, commercial land and residential land, which needs sufficient light and high intensity. The suitable soil water content in the growing period is 60% ~ 80% of the maximum field water capacity.
China Agricultural Information Network-Purple Potato Planting Method