When is the best time to grow sweet potatoes?

Sweet potato is also called sweet potato, sweet potato and red taro. Sweet potato is a food crop and a favorite snack. Because of its rich nutritional value, large market sales and high yield, the general high-yield plots reach about 4000 kg. Because of its strong storage resistance, sweet potato has a relatively long sales time and a higher price in winter. Many farmers' friends got rid of poverty and became rich by planting sweet potatoes because they seized the market. Because planting sweet potatoes is relatively labor-saving and time-saving, sweet potato seedlings can also be used to feed pigs, saving feed. Therefore, it is deeply loved by growers. Generally, after the Spring Festival, it will come soon. Seedling raising time of sweet potato is the key to high yield of sweet potato. How to raise seedlings? What should I pay attention to in the process of seedling raising?

Because of the large span between north and south in China, the seedling raising time of sweet potato is not the same. Sweet potatoes are generally planted in spring, and the seedling raising time is mostly arranged before and after the fright. The seedling raising time of late-maturing sweet potato should be completed before mid-April. In some places, in order to collect the seedlings of spring sweet potatoes, they are used as the seedlings of autumn sweet potatoes. In order to make the sweet potato grow as soon as possible in spring, more sweet potato seedlings will grow. Spring sweet potato seedlings should be raised sooner rather than later.

First, make a sweet potato seedling kang. Nursery kang should be built on sunny sand. It is best to raise seedlings in the sun bed, and the construction of the sun bed depends on the number of potato pieces. The solar bed has good thermal insulation, rapid temperature rise and easy temperature control. 2 parts of fully decomposed organic fertilizer and 8 parts of sandy soil were selected as covering soil. In order to prevent the sweet potato from mildewing, nitrogen fertilizer is generally not added. Sweet potato seedlings are mainly nutrients stored in the sweet potato blocks used. The width of the seedbed is about 1.2- 1.3 meters ... Changyi can operate freely in the sun.

Second, choose sweet potato varieties. Sweet potato seeds should generally be fresh potato pieces with smooth appearance, no damage, no disease and no freezing injury, and the size is moderate, which is in line with a certain variety. Generally, 60-70 kilograms of sweet potato seeds are needed per mu.

Disinfection of sweet potato seeds. In order to prevent sweet potatoes from getting sick, seeds are generally soaked in 0.2% potassium permanganate for disinfection for about 15 minutes. Or soak the seeds with 70% thiophanate-methyl 800 times solution for ten minutes. You can also choose 50 degrees warm water to soak the seeds 10 minute.

Fourth, seed the sweet potato. When raising seedlings in sunny seedbeds, it is generally better to arrange sweet potato blocks horizontally. The sweet potatoes are evenly arranged, and the sweet potato pieces are arranged separately. Then spray 800 times of 70% thiophanate methyl solution. Or sprinkle 600 times of 50% carbendazim solution, cover 5-8 cm fine fluvo-aquic soil, and spread a layer of plastic film on it to keep warm.

Five, another new method of sweet potato seedling. Last year's sweet potato seedlings were stored in sand and taken out for cutting the next spring. The specific method is to collect the unfrozen sweet potato seedlings, leaving only the stems and leaves, and cutting them every 2-3 sections. Then prepare 0.5% amphetamines solution. Soak the cut sweet potato seedlings in the solution for two minutes to promote forced dormancy. Remove and dry the surface moisture. Then dig a deep pit with a depth of 1 to1.2m.. It is covered with wet sand. Then put the sweet potato seedlings flat, one layer of sweet potato seedlings and one layer of sand, not too close to prevent rot. The humidity of the sand should be rubbed by hand, not dripping. The storage temperature of sweet potato seedlings should generally be controlled at 5 to 10 degrees. The top layer of sand must be more than 20 cm thick. Cover with film. Or woven bags. Cover with straw curtains and corn stalks to prevent freezing injury. Using sweet potato seedlings to store and raise seedlings can save a lot of potato pieces. The sand used is best sieved. Remove large grains of sand and use it.