Sweet potato seedling time, it is necessary to do a good job of heat preservation

The raising time of sweet potato seedlings depends on the region and climate, generally, the raising time is about March, the south can start raising seedlings in February, while the north can start raising seedlings before Ching Ming Festival. Due to the low temperature when raising sweet potato seedlings, it is necessary to raise seedlings in the hotbed and do a good job of heat preservation during the period.

I. time for raising seedlings of sweet potato

The main results are as follows: 1. The raising time of sweet potato seedlings depends on the planting area and climate. Generally, the raising time is about March. When raising seedlings in spring, they usually start before and after waking. In the south, the seedlings can be raised in February. In the north, the seedlings should be completed before Ching Ming Festival.

2. When raising seedlings, due to the low temperature, seedlings should be raised in the hotbed, heat preservation measures should be taken during the period, and the time for raising seedlings can be reasonably grasped according to the time of planting and listing, generally when planting sweet potato seedlings and starting to raise seedlings in the first 4-5 weeks.

2. The method of raising sweet potato seedlings

1. Hibernating seedlings of sweet potato vine

The main results are as follows: (1) after the sweet potato is harvested in autumn, the sweet potato vine can be cultivated as the seedling of the second year. After harvest, the sweet potato vine with sturdy growth and no disease and insect pests should be selected, and the leaves on the sweet potato vine should be removed, and the petiole should be kept at about 1-2cm.

(2) soak the sweet potato vine in Amphetrin for 3 minutes, then fish it out and dry it, and then pick out the big stones and small stones on the ground.

(3) then dig the storage cave, put the sweet potato vine neatly into the cave, and finally cover the fine sand, so that the sweet potato vine can be forced to hibernate, and in the areas where the temperature is low and prone to frost, it is necessary to cover the plastic film properly, and then dig out the sweet potato vine to raise seedlings by cuttage when the climate turns warm in the second year.

2. Root seedling of sweet potato

The main results are as follows: (1) after all the sweet potato was harvested in autumn, the sturdy and scar-free roots of sweet potato were selected to raise seedlings, during which about 3 nodes were retained in each root, then the leaves were removed, and the size of the seedling room was controlled according to the number of seedlings.

(2) if raising seedlings in greenhouse, the plant spacing should be reasonably controlled and the seedling pit should be dug. After planting sweet potato roots, the iron wire should be pulled and fixed according to the plant row spacing, and then the sweet potato roots and wire should be connected to each other.

(3) after the sweet potato root sprouts, choose about 3 new buds on each sweet potato root, during which the new buds should correspond to a good rope to facilitate the later sweet potato vines to grow along the rope.

3. Matters needing attention in raising sweet potato seedlings

The main results are as follows: 1. due to the difference of region, temperature, climate and other environment, the seedling raising time is also different, and there are many different seedling raising methods, so when raising seedlings, it is necessary to choose the appropriate seedling raising method according to individual planting technology and region, etc.

2. The method of raising seedlings by sweet potato roots can make full use of planting space, and when the amount of raising seedlings is relatively large, it can effectively increase the yield of sweet potato. Secondly, each method of raising seedlings has many different advantages and disadvantages. No matter which seedling method is chosen, the temperature should be reasonably controlled when raising seedlings, which is beneficial to the growth and development of sweet potato.