When does the sweet potato generally start seedling? How long does the farmer's seedlings know? Farmers usually store sweet potatoes directly when they are growing sweet potatoes. Until the spring, they grow the long vines, and then cut the vines into the soil to grow. In fact, there are many ways to raise seedlings of sweet potatoes. As long as you master the skills, high yield is not impossible. When does the sweet potato start to grow? How long is the seedling period?
Sweet potato seedling time:
Sweet potato species should be fully bred from mid-February to mid-April. Spring potato breeding is mostly before and after convulsions. The area south of the Huaihe River begins breeding after mid-February. The area north of the Huaihe River is bred before April 10, and the plastic film is mainly covered by hotbed or cold bed. Most of the open-faced potato is used in open field breeding before April 20, and the film is not covered. It should be more suitable for breeding 45 days before planting.
Sweet potato seedling method:
1. Potato vine hibernation breeding method
The hibernating seedling method of potato vines is to leave the potato vines harvested in autumn to the second year for sweet potato seedlings.
1. Cut the vine: After harvesting the sweet potato in autumn, choose the frost-free, disease-free and strong potato vine, remove the leaves, keep 1 cm petiole, and cut it in two sections.
2. Forced dormancy: Soak the cut potato vine in a 0.5% Amphetamine solution for two minutes, and remove the moisture from the surface.
3, sieve sand: the ordinary yellow sand is filtered with a sieve to remove large particles of sand and impurities, sprinkle water, the humidity is pinched by sand and then loosened to disperse.
4, sand: first pits on the ground, length and width are not limited, the depth of 1.2 meters (depending on the thickness of the winter frozen soil layer, the storage temperature is 5-10 °C is appropriate). Then, the potato vines are placed in a pit by a layer of vines, and a gap of 1 cm is left between the vines. The thickness of each layer of sand is not less than 3 cm, and the thickness of the upper layer of sand is not less than 15 cm. In the area where the surface is covered with plastic film and the frost is heavy, the film is covered with straw or straw. In the spring of the next year, when the sweet potato is planted, the potato vines can be taken out. The hibernating seedling method can eliminate the land occupation of seed potato seedlings and the field management during seedling cultivation. After the removal of the potato vines in the sand, a small amount of new roots have been produced. After cutting, the lived fast and the growth is good, which can make the sweet potato unit area The yield is increased by 15-20%.
Second, potato root seedling method
The potato root seedling method is to transplant the potato roots harvested in autumn to the greenhouse or the balcony of the building, and cultivate the sweet potato vines throughout the winter to be used as sweet potato seedlings.
1. After harvesting sweet potato in autumn, choose the frost-free, disease-free strong potato vine root. The vines in the upper part of the vine root leave 2-3 knots from the root, remove the leaves, and keep 1 cm petiole for use.
2. According to the amount of red sweet potato seedlings, choose a suitable nursery site, open a small ditch in the greenhouse (ditch width 30 cm, depth 20 cm), the groove center distance is 80 cm, and the sweet potato roots are 20 cm on both sides of the small ditch. The plant spacing is planted, and 12 plants are planted per square meter. The sweet potato roots can be planted in pots on the balcony of the house, and the method is cultivated in the same greenhouse.
3. In the greenhouse or above the floor of the house balcony (about 1.6 meters from the ground), pull the wire of 14-16 according to the planting distance of the sweet potato root, and tie some plastic rope or hemp rope to the wire, and tie the rope. On the wire, the other end is tied to the sweet potato root. After the vines on the sweet potato roots sprout, each plant chooses three strong sprouts, one sprout corresponds to a rope, so that the vines climb down the rope after the sweet potato roots sprout.
4, the newly issued sweet potato vines need to be manually wrapped around the rope, usually entangled once every 1-2 days, until the sweet potato vine grows to 1.5-2 meters long, and there are still about 10 days from the field transplanting, you can harvest Potato vine, remove the leaves, retain 1 cm long petiole, cut every two sections, bundle one bundle every 200-300, plant in greenhouse or flower pot, pour water, the depth is about 5 cm. . About 10 days, small buds are sprouted from the upper part of the potato vine section, and a certain root system is germinated in the lower part. At this time, the field can be transplanted.
The potato root seedling method has the characteristics of making full use of space and large seedling volume, and the potato root can harvest a certain amount of sweet potato in spring. Using this method to raise seedlings, the temperature in the balcony of the greenhouse or house should be controlled between 5-25 °C. It should not be too high or too low. Generally, 400-600 sweet potato seedlings can be cultivated per square meter.
Third, the potato vine seedling method
The potato vine seedling method is to select the frost-free and disease-free healthy potato vine after harvesting the sweet potato in autumn, remove the leaves, retain 1 cm petiole, cut into two sections, and form the potato vine segment. The later operation method is the same as the potato root. Breeding method.
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