How to grow sweet potato in Japanese way

Sweet potato is a staple food in Japan and produces about 1.8 million tons a year. Mainly cultivated in Kyushu and Canto states. Sweet potato is used to extract calcium.

For use in the food industry; For use in animal feed; Cultivated as a raw material. Japanese cultivation of sweet potato seeds is done in a nursery that has been germinated. Sweet potato seeds are 30 cm wide.

The seeds are made of wood or plastic sprouts 60 cm long and 5 or 6 cm high and the seeds are placed on top. One sprout can produce 10 kg of seeds. The seeds can also be used in seed pods used for paddy.

Hot water disinfection system

For hot potato diseases, hot water disinfection is required. Melanoflavia, the worst of sweet potato diseases, is almost completely preventable. It spreads to both the stem and the sweet potato. In nurseries, hot water is needed to prevent disease before germination.

You can use wooden barrels or iron barrels. Soak sweet potato seeds in hot water at 47-48 ° C for 40 minutes. Sweet potato seeds can be germinated if germinated after germination. It promotes the growth of young plants.

Maintenance of nurseries and seedlings

It is important to maintain the temperature, and depending on the genus of sweet potato, the germination time varies from the time the seeds are sown to the time of germination. Care for young plants depends on the temperature and humidity of the seedlings.

This is done by keeping the seedlings at a slightly lower temperature during the growing season to maintain the required moisture content, so that good young plants with broad leaves can be obtained.

After transplanting, the seedlings should be uprooted. The optimum temperature for transplanting varies depending on the plant’s growth and planting system.

Sweet potato growing season

Early sweet potatoes are planted from late April to the first week of May. Only late planting is done from mid-June to the end of June. Therefore, transplanting needs to be timed. The plants can be picked up 3-4 times and carefully cut with a knife or scissors, leaving one or two fingers.

Additional fertilization and watering after sapling; Apply with plastic wrap for 2-3 days. Care should be taken to keep the seedlings warm and moist. It is best to cut the plants between 12 noon and 2 pm. This is because the plant has the highest levels of nutrients. Early morning cutting should be avoided. It is best to plant in large plantations.

Repair and planting before planting

In Japan, it is planted as soon as the rainy season begins. Sweet potato is a crop that can grow well in any soil. Sand Sandy soil It grows well in fertile soils and can be fertilized and replanted in a short period of time. It is better to plant on land where other crops have been planted.

Sweet potato has been called an “honorable crop of environmental protection”. Select the site and plow. Grounding and line drawing must be done. It is best to combine before planting. Good ventilation and water retention capacity. Dryness If moisture is maintained, root growth and yield can be improved.

The addition of lime can increase the absorption of potassium and increase the yield, although the yield may be slightly lower. The shell color will be more beautiful. Sweet potato red is especially popular with consumers.