Post-disaster repair and replanting techniques in cotton fields——sweet potato cultivation techniques

Sweet potato is a resilient crop that can withstand adverse conditions and adapt well to various growing environments. It can be planted from sweet potato slips or early summer seedlings, and with proper post-planting care, it can produce high yields. Here are the key technical points to consider: First, planting methods. To make the most of the growing season, planting should begin as soon as the soil warms up after the last frost. The seedlings should be planted horizontally, not vertically or at an angle. Typically, the slips should be 20 to 30 cm long, with 6 to 8 nodes for optimal growth. Second, planting time. The earlier you plant, the better. It's best to complete planting no later than July 20th to ensure enough time for tuber development before the cooler weather sets in. Third, field management: 1. Mounding: After planting, create raised beds using a field tube when the soil is moist but not waterlogged. This helps improve drainage and promotes root development. 2. Fertilization: Combine mounding with early top-dressing. Apply 15 kg each of superphosphate and potassium sulfate as a base fertilizer. Later, apply additional fertilizer based on the condition of the plants. If the foliage is slow-growing or yellowing, apply 4 to 5 kg of urea per acre to restore green color. For normal green plots, use potassium fertilizer or spray 10 grams of an expansin compound mixed with 75 kg of water to encourage tuber expansion. 3. Seedling inspection: Within a week of planting, check the seedlings and fill in any gaps to ensure full coverage. 4. Weeding: Cultivate the field 2 to 3 times during the growing season. This helps control weeds, improves soil aeration, and supports healthy sweet potato growth. 5. Drainage: Ensure proper drainage by digging ditches such as Tiantougou, Weigou, and Yaogou. Remove excess water promptly from the field. Sweet potatoes are sensitive to waterlogging, and standing water can lead to root rot and hard tubers, which negatively affect both yield and flavor. By following these practices, farmers can significantly improve the health and productivity of their sweet potato crops. Proper timing, planting techniques, and consistent field management are essential for success.

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