High-yield cultivation method of sweet potatoes

Sweet potato , also known as sweet potato, is not only high-yielding and rich in nutritional value, but also has strong adaptability. It is an important food and economic crop in China and is deeply loved by people. Sweet potato cultivation is spread all over the country, but many growers face problems such as small tubers, low yields, and many insect pests, which seriously affect the yield and quality of sweet potatoes. Let’s learn how to grow sweet potatoes at high yields.

1. Select the soil

Sweet potatoes have strict requirements on soil. Soil that is too sticky will affect root respiration and tuber expansion. Therefore, you should choose soil with good drainage, deep soil layer, rich organic matter and loose soil for planting. In addition, high ridge cultivation (ridge height exceeding 20 cm) can increase soil temperature differences, which is conducive to the accumulation of photosynthetic products and makes sweet potatoes larger.

2. Reasonable fertilization

Sweet potatoes have a long growth cycle and require sufficient nutrients. When applying fertilizer, you should pay attention to the following: Do not apply excessive nitrogen fertilizer to avoid excessive stems and leaves and reduced yields. As base fertilizer, more farmyard manure should be applied to provide comprehensive nutrients and improve the soil. Avoid applying chlorine-containing fertilizers as this may affect the quality and yield of sweet potatoes.

Specific fertilization recommendations include: applying base fertilizer during transplanting, including farmyard manure and triple compound fertilizer ; applying seedling-promoting fertilizer 15 days after cutting; applying potassium sulfate during the underground tuber expansion period; spraying potassium dihydrogen phosphate on the leaves, etc.

3. Turn the vine

Sweet potato vines will produce adventitious roots during their growth. These roots will compete with the taproot for nutrients and affect the expansion of the tubers. Therefore, it is necessary to turn the vines during the growing period of sweet potatoes to destroy adventitious roots and promote concentrated nutrient supply to the tubers.

4. Harvest at the right time

The time of cutting and harvesting of sweet potatoes has a great impact on the yield. Cuttings around the time of Grain Rain are beneficial for the full expansion of the tubers, while harvesting around the time of Frost Descent can avoid frost damage and ensure yield.

In short, as long as you master the cultivation and management methods and key points when growing sweet potatoes, you can effectively improve the yield and quality of sweet potatoes. If you have other questions, please continue to ask.