The latest sweet potato early spring seedling precautions

Sweet potato seedling potential in early spring is the first link in sweet potato production, because the problems caused by seedling quality are more common, which seriously affect the follow-up growth and yield of sweet potato. Therefore, great efforts should be made to do a good job in raising sweet potato seedlings. Let's take a look at the matters needing attention in early spring along with the editor.

1. Build a seedbed

Before raising sweet potato seedlings, a greenhouse should be built as soon as possible to promote the rise of ground temperature, and the new land for the construction of seedling bed should be selected for unplanted (or nursery) sweet potato. If it is a fixed nursery bed to be disease-free new soil or substrate, use fungicides and pesticides to carry out comprehensive disinfection of the seedbed to prevent nematode disease, black spot disease, black mole disease and other harm.

2. Timely planting and raising seedlings

Before planting and raising seedlings, it is necessary to have high-efficiency varieties now, and the introduction should also take into account the local environment and climate to avoid losses. The planting time of sweet potato is from early March to mid-April, and it takes about 35 days from planting to seedling cutting. And the recent temperature is relatively low, but also to prevent the harm to the late spring cold, in the potato to choose a sunny day with higher temperature to prevent freezing. If the cooling weather is not suitable for watering after the clock arrangement, one or two layers of small arch shed can be added to increase the temperature of the seedling bed and prevent the broken bed.

3. Select virus-free seed potato

For sweet potatoes that had virus diseases such as curling leaves in the reproduction of sweet potatoes last year, they must not be seed potatoes. Seed potatoes that have been detoxified should be selected to prevent leaf roll and virus diseases and ensure yield and quality. The seed potato used for raising seedlings should have the characteristics of garden varieties, no diseases and insect pests, no wounds, no freezing injury, waterlogging and mechanical damage, and the size of potato pieces is moderate. Seed potato can be disinfected by soaking seeds in warm water or chemical agents, or it can be accelerated by high temperature. After seed germination, phoxim is applied to control sweet potato stem nematode disease.

4. Strengthen the management of seedling stage.

The low temperature growth temperature of sweet potato is 16 degrees, the suitable growth temperature is between 25-35 degrees, and the humidity is about 80%. When the sweet potato seedlings grow to 25 cm, the temperature drops to about 20 degrees, and the seedlings are refined for 2-3 days. Stubble about 3 cm, the use of high cutting seedlings, it is not suitable to pull seedlings, and then use clean soil, adding rooting agents, fungicides, insecticides, water and milky mud, dipping the base of potato seedlings with mud, which is conducive to rooting and slow seedling, control diseases and insect pests.

The above is the introduction of sweet potato seedlings in early spring, hope to help you, want to know more related knowledge, please pay attention to us.