What is the sweet potato seedling method

1, seeding time, sweet potato seeds should be in mid-February to mid-April before all the breeding. Spring potato seeding more in the hibernation before and after the hibernation, south of the Huaihe River in mid-February after the start of seeding, north of the Huaihe River in April 10 before the end of seeding, to the hotbed or cold bed covered with plastic film seeding is the main. Open field row of potatoes more than before April 20, the use of open field breeding, do not cover the film, should be planted before 45 days before the seedling breeding is more appropriate.

2, seedbed layout, choose sterile and disease-free sunny plots to do breeding seedbed, choose the wind and sunny terrain flat, well-drained, low groundwater location plots, seedbed to east-west as well, the general bed width of 1.3 meters, the length of the potato according to how many depending on the number of seeds, covered with plastic film. Fill the bed soil: bed soil should be loose, fertile, disease-free, the best use of sandy loam. Bed soil is not easy too thin or too thick, generally 5-8 centimeters appropriate. A certain amount of rotted cow and horse manure should be applied to the bed soil, and 100 grams of ammonium sulfate per square meter should be applied after the bed soil is matted to improve the quality and quantity of potato seedlings.

3, seed potato selection and processing: choose the characteristics of the variety, smooth potato skin, skin color bright, potato uniformity, moderate size, disease-free, injury-free, not subject to cold and wet damage, white pulp more potatoes for seed. The weight of 3 two-1 city catty is appropriate, 65 city catty of sweet potato seed per acre is appropriate.

4, seed potato treatment, in order to prevent seed potato with disease, can be used in warm water or pharmaceutical seed dipping. Participate in the warm water soak seeds with 51-54 degrees of warm water can be immersed for 10 minutes, soak seeds to strictly control the water temperature and time, seed potatoes under the first warm water should be constantly up and down, so that it is heated evenly. The use of open field seedling seed potato or seed potato has been slightly frost damage, are not suitable for warm water seed dipping. Seed potatoes can also be used in pharmaceutical seed dipping, with 50% carbendazim with 500 times water, or 70% tetrapyrin with 700 times water to soak the seed for 10 minutes, can be sterilized to prevent disease. You can also use the above medicine water wave sprinkle also seedbed.

5, row seed technology: row seed has oblique row, flat row and straight row three kinds. Slanting row is 1/3 of the potato head pressure potato tail, so that the middle and upper part of the potato bed, solar seeding to flat row is good, potato seed distribution is uniform and not dense, conducive to the cultivation of strong seedlings. Straight rows should not be used in general. The row of potatoes should be clear head and tail, can not be arranged upside down. Generally, the head of the potato skin color is dark, the pulp juice is more, and the fine root is less. Because of the different sizes of potatoes, and therefore to classify the selection, respectively, row potato, should master the large potato dense row, small potatoes sparse rows, rows of the principle of Qiqi, so that the potato block above the soil uniformly uniform and neat seedlings, to facilitate the management of the seedbed.