How to cultivate sweet potato seedlings

Seedling raising time: the raising time of sweet potato seedlings is about March. Cultivation method: the hibernating seedling method of potato vines harvested in autumn is to soak the leaves of potato vines collected in autumn for about 3 minutes, then dry and store them until the following year before cutting seedlings; potato root seedling method refers to the completion of harvest in autumn, select high-quality potato vines to retain 3 sections, transplant to the greenhouse, after overwintering, it can be used as sweet potato seedlings.

I. Seedling raising time

The main results are as follows: 1. generally, sweet potato seedlings are raised around March, and the appropriate breeding time can be selected according to different regions and climates. the seedlings can be raised in February in the south and around Ching Ming Festival in the north.

2. If the temperature is relatively low when raising seedlings, the heat preservation work should be done in time. Generally, the seedlings can be raised about 4-5 weeks before planting.

2. Methods of raising seedlings

1. Hibernating seedlings of potato vines

The main results are as follows: (1) the method is to save the potato vines harvested in autumn for next year as sweet potato seedlings for cultivation.

(2) method of operation: after harvest, you should first select potato vines with sturdy growth and no diseases and insect pests, remove all the leaves from the potato vines, retain the petiole for about 1-2 cm, then soak the treated potato vines in Amfidrin for about 3 minutes, then fish them out to dry, and then remove the larger stones and boulders from the ground, etc., you can dig a storage pit, put the potato vine in the pit, and cover it with a layer of fine sand. Let the potato vines gradually go into hibernation.

(3) if the seedling is raised in the area of low temperature and frost, the work of heat preservation must be done well, and the film can be covered in time, and the potato vine can be directly dug out to raise seedlings by cutting when it is suitable for planting in the second year.

2. Raising seedlings with potato roots

The main results are as follows: (1) after all the sweet potatoes are harvested in autumn, the sturdy roots with no loss should be selected, all the leaves should be removed, and 3 nodes should be left for each root.

(2) selecting the suitable planting site according to the specific number of sweet potato seedlings, a small ditch can be dug in the greenhouse, the depth of the ditch is about 20cm, the width of the ditch is about 30cm, the distance between the center of the ditch is about 80cm, and the distance between roots and plants of sweet potato is about 20cm, and about 12 plants can be planted per square meter.

(3) after the sweet potato root is planted, the iron wire is drawn according to the planting spacing, so that the sweet potato root is closely connected with the iron wire. after the plant germinates, each sweet potato root can select three new buds and fix it on the wire with a rope. in the later stage, the sweet potato root can grow along the vine.

Matters needing attention

The main results are as follows: 1. due to different regions, climate and other reasons, the seedling raising time will be different. We can choose the appropriate seedling raising time and method according to the local air temperature and planting environment, which can effectively improve the utilization rate of space and increase the yield.

2. No matter which method is used to raise seedlings, in order to make the sweet potato grow healthily, the growth temperature of sweet potato seedlings must be controlled.