How to raise sweet potato seedlings quickly and quickly, and the method of cutting seedlings

Sweet potato seedlings generally adopt the traditional method of potato vine hibernation seedling, the concrete steps are: firstly, selecting healthy sweet potato vine and removing leaves, reserving petioles of about 1 cm, cutting according to each section, and putting the cut sweet potato vine into amphitrin solution for 2 minutes, and then drying; then, putting the sweet potato vine into the pit sand storage by adopting the method of one layer of vine and one layer of sand; finally, cutting the sweet potato vine to the field when the average temperature in spring reaches 15℃ or above.

1. Sweet potato seedling method

1. Generally, the traditional sweet potato seedling technology is adopted, which is to plant the sweet potato harvested in the previous year in spring, and then transplant the sweet potato seedlings, but this method requires a large amount of seed potatoes.

2, the use of "potato vine hibernation seedling method" for seedling, can make waste potato vine waste into treasure, but also can save a large number of seed potatoes, has significant economic benefits.

II. Sweet potato seedling raising steps

1. Cutting vines

Generally, after harvesting sweet potatoes in autumn, healthy sweet potato vines without frost and disease can be selected, and then leaves are removed, 1cm petioles are retained, and shearing is carried out according to one section per two sections.

2. Forced dormancy

During this period, the cut potato vines were soaked in 0.5% amphitrin solution for 2 minutes, and then removed and dried. This kind of medicine was sold in chemical reagent shops.

3. Sand screening

Sift ordinary yellow sand, remove large particles and impurities, sprinkle water to humidity, squeeze the sand tightly by hand, and loosen it to break it into pieces.

4. Sand storage

(1) First dig a pit on the ground, unlimited in length and width, 0.5 m deep, and then put the potato vine into the pit flat by using the method of one layer of vine and one layer of sand. A gap of 1cm needs to be reserved between the vine and the vine.

(2) The thickness of each layer of sand is not less than 3cm, and the thickness of the top layer of sand is not less than 15cm, and then a layer of plastic film is covered on its surface. For areas with heavy frost, straw or grass curtain can be covered on the film. When sweet potato is planted in the spring of the second year, the sweet potato vine can be taken out for cutting.

5. Cutting

(1) When the average temperature in spring is above 15℃, the sweet potato vine can be planted in the field. Since the temperature is low from late April to mid-May, the plastic film can be used for cultivation during this period. When planting, 4 nodes can be inserted horizontally or obliquely into the soil.

(2) When the weather is dry, the two leaves are exposed to the ground, and the rest of the leaves are buried in the soil, which is conducive to the survival of potato seedlings and the uniform distribution of tubers, and improves the commodity rate and yield. Generally, the suitable planting density is 4000 plants per mu, and the plant spacing is 20cm.

6, seedling

(1) Generally, the "potato vine hibernation seedling method" is adopted, which has the characteristics of low investment and easy management, which can eliminate the decay loss of seed potato storage, and at the same time can save the land occupation of seed potato seedling and the management during seedling period, which is very suitable for small-scale implementation of farmer households.

(2) After taking out the sweet potato vine stored in sand, a small number of new roots have been born, so the survival rate after cutting is fast and the growth is good, which is conducive to increasing the yield per unit area of sweet potato by more than 15%-20%.