Japanese Purple Sweet Potato King - Sweet Potato Variety
Japanese Purple Sweet Potato King - sweet potato variety provided by Jindi Agricultural Sweet Potato Planting Base:
Characteristics of the Japanese Purple Sweet Potato King
High yield, excellent quality, and disease-resistant. The following are the characteristics and features of this variety:
1. Strong adaptability and good disease resistance: highly resistant to sweet potato root rot, relatively resistant to stem nematode disease, tolerant to poor soil and drought conditions, suitable for planting under various climatic and soil conditions.
2. Early maturing, can be planted in two seasons: sweet potatoes enlarge early, if cultivated with early spring mulching, they can be marketed from late July to mid-August.
3. Superior quality: purple-black skin, purple flesh, long spindle shape, smooth and bright skin, good commercial appearance, with a high commodity rate of over 90%, drying rate around 33%. Fine texture, an excellent fresh-eating health-promoting sweet potato variety, also suitable for processing natural anthocyanins.
4. High fresh sweet potato yield: uniformly concentrated tuber formation, spring sweet potatoes generally produce about 2500kg per 667 square meters, which is more than double compared to "Shanchuanzi". If managed properly, summer sweet potatoes can also reach about 2000kg per 667 square meters.
1. Short vines with many branches, strong above-ground growth: green leaves, purple stems, 5-6 branches, length only about 1.2-1.5m, convenient for large-scale field production management.
5. Short vines with many branches, strong above-ground growth: green sweet potato leaves, purple stems, 5-6 branches, length only about 1.2-1.5m, convenient for large-scale field production management.
Main Cultivation Techniques for Purple Sweet Potato King
1. Land preparation and fertilization:
Land preparation should be done on sunny days, breaking the soil into fine particles to make it loose. After leveling the land, apply base fertilizer in strips at the bottom of the ridges. Ridge spacing is 80cm, ridge height around 20cm. Organic compound fertilizer can be used as base fertilizer, applying 100kg of specialized compound fertilizer per 667 square meters or 50kg of cake fertilizer, 5kg of urea, and 15kg of potassium sulfate. For cultivation using plastic film cover, fertilizer usage can be reduced by 20%-30%. When the planting area is large, it is necessary to measure the nitrogen, phosphorus, potassium content, organic matter, and soil pH value, and reasonably formulate the nitrogen, phosphorus, potassium ratio and organic fertilizer based on soil fertility levels and sweet potato nutrient requirements.
2. Seedling cultivation:
It is recommended to use a three-layer insulation seedling cultivation method with a greenhouse + small arch shed + plastic film to promote earlier sprouting followed by plastic film-covered cultivation, achieving earlier market supply and increased economic benefits. Conventional cultivation can use a two-layer insulation seedling cultivation method with a small arch shed + plastic film. The seedbed width is about 10m, dig 15-20cm deep, lay a layer of organic fertilizer at the bottom of the bed, water, and cover with soil. Select sweet potato tubers that have the characteristics of this variety, free of pests and diseases, weighing 100-250g. The planting density is about 3cm between tubers. Cover the soil after planting the tubers, thickness around 2-3cm, not exceeding 5cm to avoid affecting sprouting. When 60% of the tubers sprout, remove the plastic film. On sunny days when the temperature is above 20°C, open the arch shed and greenhouse films at both ends for ventilation to prevent high temperatures from burning the seedlings, maintaining the seedbed temperature at 25-30°C. Humidity control method involves keeping the seedbed moist but not waterlogged, regulating the temperature and humidity of the seedbed to cultivate strong seedlings. When the sweet potato seedlings grow to about 20cm with 6-8 complete leaves, they can be cut and transplanted to the field.
3. Transplanting:
When the average temperature reaches above 10°C, the seedlings can be cut and transplanted to the field. Since the temperature is lower in the early stage, plastic film-covered cultivation can be adopted. The transplanting method requires horizontal or slanted planting with four nodes underground. During drought, leave two leaves and one heart above ground, burying the rest of the leaves in the soil to facilitate sweet potato survival and even distribution of tuber formation, improving the commodity rate and yield. For small ridge single-row cultivation, the ridge spacing is 70-80cm; for large ridge double-row cultivation, the ridge spacing is 120-140cm. Make two small ridges on the large ridge, plant spacing is 18-20cm, planting density is 4000 plants per 667 square meters.
Field Management of Purple Sweet Potato King
1. Water management: during the seedling stage, watering should be appropriately controlled to prevent excessive growth and promote downward root growth. During the tuber enlargement period, keep the ground moist, maintain soil moisture at 70%-80%, prevent sudden dryness and wetness to avoid tuber cracking and increase tuber commodity rate.
2. Seedling stage management: if drought occurs during transplantation, water promptly to ensure survival. Remove weeds immediately 20 days after transplantation. In the middle growth stage of sweet potatoes, manually weed 1-2 times and move the soil from the ditch to the ridge. In the middle growth stage, combine weeding with lifting the vines 1-2 times, note that vines cannot be lifted within one month before harvest.
Jindi Agricultural Company's sweet potato planting base offers wholesale sweet potatoes, sweet potato seeds, and sweet potato seedlings. Purchase sweet potato seeds and receive a free sweet potato planting technology DVD. Contact number: 15080987576
For more details, please visit the company website: http://www.jindinongye.com