The cultivation time of sweet potato seedlings depends on planting area and climate. When is it usually?

According to different materials, sweet potato seedlings can be divided into: sweet potato root seedlings and sweet potato vine seedlings. These two ways of raising seedlings have their own advantages and disadvantages. Today, let's take a look at the time and cycle of two different seedling raising methods. The root seedling of sweet potato, which we usually see, is the most common way to raise seedlings. According to different conditions, the seedling raising time may be different, but generally speaking, the seedling raising time of sweet potato should be from mid-February to early April, and the spring seedling raising time of sweet potato in the south of Huaihe River starts from mid-February, and the temperature in the north of Huaihe River is slightly lower, so it can be postponed until March to early April. Seedling raising with plastic film can be advanced and seedling raising in open field can be delayed, but it is more suitable to raise seedlings before April 20.

Problems that should be paid attention to in seedling raising of sweet potato tubers: the layout of seedbed should be paid attention to. Choose leeward and sunny, flat terrain and good seedbed surface to avoid the influence of north wind or south wind on seedbed. The bed soil should be loose, fertile sandy soil with no pests and diseases, with a thickness of about 5 cm, and appropriate organic fertilizer should be added to the bed soil to improve the quality and quantity of sweet potato seedlings.

Pay attention to the selection of sweet potato seeds. Sweet potatoes should be selected with moderate size, no pests, no freezing damage and no wet damage, weighing 3 Liang to 1 kg, and each mu needs about 50 kg of sweet potatoes. Pay attention to the treatment of sweet potatoes. The sweet potato should be disinfected before planting, which can be treated with warm water at 50 degrees Celsius for 10 minute, or soaked with carbendazim or other liquid medicine, and the liquid medicine should be properly sprinkled on the seedbed to prevent diseases. Pay attention to the arrangement of sweet potatoes. There are three arrangements: oblique, horizontal and vertical. In the process of arranging potatoes, we should master the principle of "big potatoes are closely arranged and small potatoes are sparsely arranged". Cover potato blocks with soil after rows to ensure even and orderly seedling emergence, which is convenient for management.

Seedling raising of potato vines refers to the propagation mode that the potato vines harvested in autumn stay for one winter and take root by cutting in the next year. This method takes less time than tuber root system seedling raising. Operation method of potato vine seedling raising. In the early autumn frost, Wu Binghai's potato vines were selected, and the leaves were removed, leaving the petiole of 1 cm. The cut potato vines should be broken according to each section, and then 0 should be added. Soak the sweet potato vines in 5% Anfeite solution for two minutes, and then store the sweet potato vines with a layer of sand and a layer of vines, with the spacing of 1 cm, and the thickness of each layer of sand is about 3 cm; The thickness of the top layer of sand exceeds 15cm, and the film covers the surface. If the temperature is low in winter, you can stick a layer of straw on the film. In the next spring sweet potato planting season, cuttings can be directly carried out.