Then cut the seedlings and soak them in Bt and other biological bacteria 1h before transplanting. The planting spacing is 33 ~ 43 cm, and 2200 ~ 3000 plants are planted every 667 square meters.
Finally, a single row triangular planting mode along the ridge is adopted, and a flat planting mode of outcrop or buried stem and hidden head is adopted. After planting, water properly according to the soil moisture content.
Precautions: Spring planting and early winter planting should avoid cold current, and autumn planting should prevent autumn drought. 5 ~ 7 days after planting, the seedlings should be inspected and supplemented.
Extended data
Sweet potato (English: sweet potato), scientific name: sweet potato (sweet potato? Batata? Lin. ) Also known as sweet potato, sweet potato, sweet potato, sweet potato, sweet potato (North), sweet potato (multiple dialects), sweet potato, sweet potato, sweet potato, Zhu potato, pillow potato, Pange, sweet potato, fennel sweet potato and red skin.
Sweet potato belongs to the family Convolvulaceae of the genus Panicum, which is more than 2 meters long and lies on the ground. Its leaves are usually wide oval, 4- 13 cm long and 3- 13 cm wide. Corolla pink, white, lavender or purple, bell-shaped or funnel-shaped, 3-4 cm long, and capsule ovoid or oblate.
Store and preserve
Before the first frost comes, sweet potatoes need to be dug out of the ground. Try not to damage its epidermis when digging, and store it in the previously dug cellar. The soil around the cellar is loess with a depth of 3-5 meters. Put the sweet potatoes neatly in the cellar, sprinkle some preservatives at last, and cover the cellar with a haystack.
1. After the temperature rises in spring, in calm and sunny weather, when the temperature exceeds 12℃ at noon, the concentration of miscellaneous bacteria in the cellar can be reduced, so as to prevent excessive humidity in the cellar from causing mildew on the damaged skin of potato pieces and affecting the appearance quality of goods.
2. The temperature in the cellar is always kept at113℃ and the relative humidity is kept at 85~90%. If the cellar temperature exceeds 15℃, properly open the vent to release the temperature. However, it should be noted that the temperature in spring is often unstable, and there will be snowy and cold weather from some years to April. Especially in potato pits with poor thermal insulation performance, we must not be careless. Once the cellar temperature drops, immediately cover the vent for thermal insulation, and use heating facilities for proper heating if necessary.
3. When the humidity in the cellar is low, water should be added to the cellar pool or wet grass curtains should be laid on the walkway to increase the air humidity in the cellar.
Four, found that the sweet potato disease in the cellar has a spreading trend, should be taken out immediately and eaten as soon as possible, in order to reduce the loss of disease.
5. After the sweet potato seedlings are harvested in spring, it is planned to postpone storage. Attention should be paid to strengthening the management of temperature and humidity. The highest cellar temperature should not exceed 65438 05℃, and the relative humidity should be controlled at 65~90%. After the weather gets hot, we should also pay attention to the ventilation of the cellar. For a long-term closed potato cellar with a large number of rotten potato pieces, the vent should be opened in advance for ventilation before entering the cellar, and it is safe to enter the cellar to avoid hypoxia and suffocation.