How to manage sweet potato expansion period

Sweet potato played a very important role in our country before, and it can be said that it is the savior of many people. Even now sweet potatoes have a large planting area, when planting sweet potatoes, its management is very important. And there are different management methods in different growth stages of sweet potato, especially in its expansion period. So the editor below brings you the management method of the expansion period of sweet potato, let's have a look!

1. Water management

Sweet potato in the expansion period of the demand for water is relatively large, if encountered in the expansion period of high temperature and drought weather. Then it is necessary to water in time and use water to improve the utilization rate of fertilizer. Promote the growth of sweet potato stems and leaves, enhance the photosynthetic capacity of sweet potato leaves, increase the accumulation of nutrients, which is beneficial to the expansion of sweet potato roots. However, it should be noted that watering should be stopped three weeks before the sweet potato harvest. Prevent excessive moisture and reduce the storability of sweet potato roots. And if encounter rainy weather and watering too much, but also timely drainage, to prevent root waterlogging, resulting in hard core rot, reduce the yield.

2. Timely fertilization

Under normal circumstances, the expansion period of sweet potato is usually around September every year, and cracks will occur in the field because of the expansion of sweet potato. At this time, we should use these cracks to apply crack fertilizer in time to avoid premature senescence caused by lack of nutrition of sweet potato, and can also effectively promote the expansion of sweet potato. The main fertilizer of crack fertilizer is nitrogen and potassium fertilizer. When applying fertilizer, we should pay attention to the reasonable control of the amount according to the area of the land. Fertilizers are applied along the cracks to promote the nutrient absorption of sweet potato roots. If there is a plot of premature senescence and late maturity, then the mixed fertilizer solution such as nitrogen, phosphorus and potassium can be applied appropriately.

3. It is strictly forbidden to turn over the vine

Many farmers in the sweet potato expansion period will have the habit of turning vines, in fact, this is not conducive to sweet potato expansion. Vine turning will cause damage to the stems and leaves of sweet potato, resulting in a decrease in the photosynthetic capacity of sweet potato leaves, reducing the accumulation of photosynthetic matter, hindering the expansion of sweet potato blocks and reducing yield by up to 30% in severe cases. Therefore, we should not turn the vine during the whole growth period of sweet potato. For some sweet potato fields with strong growth, we can properly open the vine and lift the vine to control the growth. Prevent the fiber root from consuming too much nutrition, improve the photosynthetic capacity of leaves, and achieve the purpose of expansion.

4. Apply foliar fertilizer

During the expansion period of sweet potato, the nutrient absorption capacity of the root will decrease. Therefore, we should properly spray foliar fertilizer to ensure the nutrition needed for root expansion, and urea should be properly sprayed in the fields with premature senescence. For strong growing plots, foliar fertilizers such as potassium sulfate can be sprayed. When spraying foliar fertilizer, it is necessary to ensure that it is comprehensive, and the dosage per mu should be kept at about 85 kg. It should be carried out in the early stage of sweet potato expansion, as far as possible when the temperature is low in sunny days, and if it rains after spraying, then it should be sprayed in time.

The above is a brief introduction of how to manage the sweet potato expansion period, and the management of the sweet potato expansion period is very important. The yield and quality of sweet potatoes are closely related, so we must pay more attention to them. That's all for today's introduction. This article is for reference only. Thank you for your reading and support.