Detailed Explanation of Key Points of High-Yield Sweet Potato Cultivation Techniques

Sweet potato is red sweet potato, one of China's five grains and miscellaneous grains. As people's awareness of health preservation strengthens, the market for sweet potato is much better than before. Although growing sweet potato is simple, achieving high yield requires considerable effort. Let's take a detailed look below with the editor.

1. Land preparation and fertilization

Sweet potato is a root tuber plant, suitable for growing in soil with deep soil layers, loose texture and good air permeability. Before planting, the soil layer should be deeply plowed to improve its permeability, which is conducive to root tuber expansion and increases yield. Plowing is generally 30-40 cm. Ridging cultivation can be used. If fertility is relatively poor, flat cultivation or low-ridge cultivation can be used. However, sweet potato is generally planted on sandy soil with insufficient fertility, so base fertilizer must be applied to obtain high yield. Generally, 2000-2500 kg of decomposed organic fertilizer per mu, combined with 50 kg of nitrogen-phosphorus-potassium compound fertilizer.

2. Seed selection and cultivation

Choose high-quality varieties with high yield and strong disease resistance, such as virus-free Beijing 553, virus-free Xushu 18, Xinnong No. 1, etc. Different regions have different climates and soil conditions, so the planting time should be chosen according to local conditions. Generally, the planting time is April-May, when rainfall is abundant and temperature is suitable, and the survival rate after planting is high. When planting, pay attention to planting density, so that long-vine varieties and plots with sufficient fertility are suitable for sparse planting, while short-vine varieties and plots with insufficient fertility are suitable for dense planting.

3. Intertillage and weeding

Proper intertillage during the growth period can loosen the soil, increase permeability, raise ground temperature, and also eliminate weeds. Generally, during the seedling stage, intertillage and weeding should be done multiple times to promote seedling growth. However, pay attention to the depth of intertillage to avoid damaging the root system and affecting the normal growth and development of the plant. For long-vine varieties, when they grow to a certain extent, timely pinching should be done to make the stems and vines thick and multi-branched, which has a yield-increasing effect. When the tubers expand, vine control should be carried out to avoid excessive vegetative growth and affect yield.

4. Fertilizer and water management

When tubers expand, some regions are dry with little rain, while some regions are hot with much rain. These environments are unfavorable to sweet potato growth. In dry and rain-scarce regions, timely watering is needed to avoid premature senescence of stems and leaves and promote tuber expansion; while in hot and rainy regions, drainage measures should be taken to avoid waterlogging causing root rot or rapid tuber expansion, which is unfavorable to quality. During expansion, expansion hormone and foliar fertilizer can be sprayed to promote nutrient transfer to the root tubers, accelerate nutrient accumulation, and the yield-increasing effect is obvious.

The above are high-yield sweet potato cultivation techniques. I hope they can help you. To learn more related knowledge, please follow us.