The biggest taboo of growing sweet potatoes.
1, avoid using raw fertilizer.
As we all know, raw fertilizer is easy to attract insects. There are germs and eggs in the raw fertilizer. If applied to the soil, the bacteria will infect potatoes and sweet potatoes. Among them, eggs will hatch to form adults; Fattening will also attract pests outside. Therefore, when planting potatoes and sweet potatoes, you must not use raw manure, or even some manure that has not been fermented.
After the fermentation of raw fertilizer is completed, there is no odor or the taste is very weak. If there is still a strong smell, it means that the fermentation is not completed, which is the standard to distinguish whether the fertilizer is fermented or not.
2. Avoid using urea alone.
Nitrogen fertilizer is an essential nutrient for crops. Sweet potatoes and potatoes can't live without nitrogen fertilizer throughout their growth period, but nitrogen fertilizer needs to be used together with other fertilizers, such as potassium fertilizer. But to control the dose, not too much.
Introduction of high yield methods of sweet potato;
1, strictly select soil.
High-yield cultivation of sweet potato has strict requirements on soil. There is an old saying that "sweet potatoes are planted in waterlogged lowlands, and nine harvests are blind", so sweet potatoes should be planted on plots that are not easy to accumulate water. Secondly, the soil is too hard or sticky, so sweet potatoes should be planted on the soil with deep soil layer, rich organic matter content, loose soil and large porosity.
2. Sweet potato vine
The vines of sweet potato will grow many adventitious roots in the growth process, so it is necessary to turn the vines during the growth period of sweet potato. Sweet potato cultivated in high ridge can be turned from the left side of the ridge to the right side, and from the right side of the ridge to the left side, destroying the adventitious roots of the plant. The first vine turning of sweet potato should be carried out in early August, and the second vine turning can be carried out every 20 days.