How to grow autumn sweet potatoes well? Detailed explanation of key cultivation techniques
How to grow autumn sweet potatoes well? Please help explain. Autumn sweet potatoes are best suited for use as seed potatoes, so choosing excellent varieties is especially important. At present, the excellent varieties relatively suitable for cultivation in our prefecture include: Nanshu 88, 868, Xiangshu No. 15, Xiangshu No. 16, Jinye, Zijinshu, Ys86, Ys13, etc. Plant at a reasonable density, ensure full stands, and plant vine cuttings, with each section having 4-5 nodes. The planting density should preferably be 5000-6000 plants per mu. After planting, water thoroughly to ensure survival.
How to grow autumn sweet potatoes well? Please help explain.
Autumn sweet potatoes are best suited for use as seed potatoes, so choosing excellent varieties is especially important. At present, the excellent varieties relatively suitable for cultivation in our prefecture include: Nanshu 88, 868, Xiangshu No. 15, Xiangshu No. 16, Jinye, Zijinshu, Ys86, Ys13, etc. Plant at a reasonable density, ensure full stands, and plant vine cuttings, with each section having 4-5 nodes. The planting density should preferably be 5000-6000 plants per mu. After planting, water thoroughly to ensure survival.
When planting, apply 1500-2000 kg of decomposed pig and cattle manure and 15-20 kg of potassium fertilizer per mu as base fertilizer. Autumn sweet potatoes are generally cultivated twice. The first cultivation is carried out after the sweet potato seedlings survive, with a cultivation depth of about 7 cm. Combine cultivation with the application of decomposed human manure or quick-acting nitrogen fertilizer (apply 25-30 kg of ammonium bicarbonate per mu) to promote seedling growth and early tuber formation. The second cultivation is carried out about 20 days after planting, and apply compound fertilizer once according to the growth of the sweet potato seedlings. After the second cultivation, earth up and repair the ridge edges to prevent the tubers from being exposed. If autumn sweet potatoes encounter long-term drought, irrigate 1-2 times. In places with insufficient water sources, cultivate more frequently, or spread more grass and increase the application of organic fertilizer.
Irrigation should preferably be carried out in the morning or evening. The irrigation depth should preferably reach 2/3 of the ridge height, and the irrigation time should not exceed 4 hours. After each irrigation, loosen the soil once to prevent water evaporation. The stems and leaves of autumn sweet potatoes are relatively tender and are susceptible to damage by sweet potato tobacco cutworm, sweet potato hawkmoth, and flea beetles, which can be controlled by spraying pesticides. To prevent turning the vines from damaging the adventitious roots on the vines, reducing nutrient absorption capacity and plant stress resistance, and causing yield reduction, never turn the vines of autumn sweet potatoes.
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