Method for protecting and propagating sweet potato seedlings in winter

Abstract

The invention discloses a method for protecting and propagating sweet potato seedlings in winter, and belongs to the technical field of sweet potato cultivation. The method specifically comprises thesteps of shearing healthy sweet potato seedlings, and transplanting the healthy sweet potato seedlings into an isolation net chamber; after the seedlings recover and grow new leaves, spraying 800-folddiluent of acetamiprid; uniformly mixing peat soil, vermiculite, perlite and field soil according to a certain ratio as a mixed matrix, and adding 3% hymexazol formate water diluent; transplanting seedlings in the net chamber, selecting robust plants, removing redundant root systems, performing field planting, and placing the plants on a double-layer greenhouse pot frame; after seedling recovering, reserving the plant height of 15 cm, performing topping and pinching once every 15-20 days in the whole winter, and strengthening light supplementing and temperature increasing management; in Aprilof the next year, when the temperature rises again, cutting branches of 15-20 cm from flowerpots for propagation. By using the method, branch germination can be promoted by continuous topping and pinching during seedling protection in winter, the purposes of seedling protection and rapid propagation are achieved, and enough basic seedlings are provided for propagation in spring.

Description

technical field [0001] The invention relates to a technology for preserving and multiplying sweet potato seedlings under low temperature conditions in winter, in particular to a method for preserving and multiplying sweet potato seedlings in winter, and belongs to the technical field of sweet potato cultivation. Background technique [0002] In the past, sweet potato planting in different potato areas was basically one season a year. Due to the low temperature in early spring, summer potatoes were basically planted in northern potato areas, and the planting time was basically concentrated in early and mid-June; but with the adjustment of industrial structure, for To increase planting income, many places have changed from planting summer potatoes to spring potatoes, and even two seasons a year have reached the staggered supply of sweet potatoes, which not only improves the quality of sweet potatoes, but also increases the sales price, enabling people to increase production and...

AI Technical Summary

Problems solved by technology

[0003] In order to ensure sufficient supply of seedlings in early spring, winter seedling preservation work has begun in production. However, due to the cold winter in the north, most rely on greenhouses and small sheds to keep warm. The temperature is difficult to guarantee, and the humidity is high. - Chilling damage is prone to occur within 10 days, and the loss of seedlings is relatively large

Even if it is preserved, it will basically not grow in winter due to low temperature and poor light. Impact