What are the planting methods of sweet potato? What is the variety of white-hearted sweet potato?

Sweet potato is a very common food, which can be baked or steamed. It tastes sweet and is rich in dietary fiber. There are many varieties of sweet potatoes, such as red hearts and white hearts. So what kind of white-hearted sweet potato belongs to?

What are the planting methods of sweet potato? Sweet potato generally adopts cuttage seedling raising method, that is, it is propagated through sweet potato vines. The main reason for not using seed potato is that the skin of sweet potato seeds is hard and thick, which is not easy to absorb water and a small amount of nutrition, thus affecting the normal germination of sweet potato seeds.

It is easy to take root directly with sweet potato vine, and the survival rate is very high. It is also very simple and convenient for growers to need agricultural management, which reduces the links of watering and fertilization.

In addition, sweet potatoes are cross-pollinated. Cross pollination may come from pollen of other crops or other varieties of sweet potato after flowering. Such planting may change the original genes of sweet potatoes and cannot guarantee the characteristics of the original varieties!

What is the variety of white-hearted sweet potato? The variety of white-hearted sweet potato is called glutinous rice sweet potato. There are two kinds of sweet potato with white heart according to skin, one is light yellow sweet potato with white heart and the other is sweet potato with red skin and white heart.

Yellow skin and white heart, scientific name victory 100. The heart is not pure white, slightly yellow. The shape is round and natural, the taste is sweet, and there is no tendon. Generally, it is directly processed and eaten.

Red skin and white heart, slender shape. It is characterized by high starch content and high flour yield. The taste is dry and the sweetness is average. There are more tendons. Generally used to make sweet potato starch.

White-hearted sweet potato contains more water than red-hearted sweet potato, but it has higher cellulose content. So white-hearted sweet potato was used to extract starch, and then it was processed into sweet potato powder. It is best to use fermented organic fertilizer to grow white-hearted sweet potatoes, and there is nothing special about it.

Suitable planting areas of sweet potato: Hunan, Hubei, Shandong, Sichuan and other places.

Planting conditions and temperature of sweet potato: sweet potato likes temperature, is not cold-resistant, and is very sensitive to temperature. For example, when the ground temperature is 10 degree, sweet potato can't germinate, and the root of sweet potato is 15 degree. When the roots need 5 days, the sweet potato roots with the temperature of 17 ~ 18 must grow normally. Sweet potato roots at 20 degrees can germinate in 3 days. 1 day when the temperature is between 27 degrees and -30 degrees. Can germinate. At the temperature of 25 to -28 degrees, the stems and leaves of Honghu Lake grow fastest. More than 30 degrees is helpful to the growth of stems and leaves, but it will slow down the expansion of sweet potato fruit. When the temperature is higher than 38 degrees, the stems and leaves of sweet potato will grow slowly, but they will not die. When the temperature reaches 15 degrees, the growth of sweet potato will stop. 10 degrees or so, the stems and leaves of sweet potatoes will freeze to death.

Lighting: Sweet potatoes have high requirements for light. When the light is good, the sweet potato leaves are thick and the stems are thick and firm. When this happens, the yield of sweet potato is naturally high, but when the light is insufficient, it is a dull scene. For example, the leaves of sweet potato will dry and turn yellow, the leaves will become more and the stems will become thinner, the transport speed of nutrients to sweet potato will slow down, and the natural yield will also decrease.

Moisture: Sweet potatoes are more like dry weather. The reason that affects the yield is that the sweet potato grows too much, so the moisture changes too much, which is not conducive to the growth of sweet potato. Fresh sweet potato seedlings need more water, but the water supply needs to be reduced at the flowering stage. If the amount of water is too large, the opening time of sweet potato will be shortened, which will affect the yield of sweet potato. So be sure to pay attention to sweet potatoes when planting. Control moisture.

Fertilizer: Sweet potatoes need a lot of fertilizer, so we must ensure the supply of fertilizer when planting. It must have enough base fertilizer. (Sulfur, iron, magnesium and calcium are used less. Sweet potato mainly needs the most potassium fertilizer, less nitrogen fertilizer and less phosphorus fertilizer. Usually, for every 1 0,000 kg of sweet potato, 3.5 kg of nitrogen fertilizer, 5.6 kg of phosphate fertilizer 1.75 kg of potassium fertilizer should be used. Other fertilizers should be changed according to different land and sweet potato, and the problems in the planting process should be determined.

Soil: Sweet potatoes are not very demanding on land. As long as the pH value is between 4.5 and 8.5, it can be planted, especially on the land with pH value between 5.2 and 6.7, which will change the yield of sweet potato. Much better. Therefore, when choosing land, we must pay attention.