Cutting seedling raising method for improving propagation coefficient of day lily based on bud segmentation

Abstract

The invention relates to a cutting seedling raising method for improving the propagation coefficient of day lily based on bud segmentation. Compared with a single-plant bud propagation method, the method has the advantages that main buds and lateral buds on short stems are longitudinally segmented according to different proportions, seedlings are cultured by the aid of substrates, the seedlings can germinate after 3 days, the survival rate reaches 78-93%, the propagation coefficient reaches 1.56-2.80, and the seedlings can be transplanted after 30 days; the apical dominance is broken through the segmented buds, the germination of hidden buds on short stems is promoted, and later-stage propagation by using cutting seedlings is facilitated; according to the method, cutting is performed based on buds, operation is easy, cost is low, the improved variety expanding planting speed of the day lily is increased, and the genetic sexual stability of vegetative propagation is kept.

Description

technical field [0001] The invention relates to the technical field of growing day lily seedlings, in particular to a cutting seedling raising method for raising day lily seedlings based on bud segmentation and increasing the propagation coefficient of day lily. Background technique [0002] Day lily (Hemerocallis sp.), also known as Day Lily, has ornamental value. It originated from the temperate regions of southern my country, Japan and Europe. It has a long history of cultivation in my country and is planted in both the north and the south. The flowers, roots and seedlings of day lily can be used as medicine, and its flower is also a kind of flower-eating vegetable with health care function. Day lily is delicious, nutritious, loved by consumers, and has high economic value. Day lily can be eaten fresh, but most of it is made into dry products and sold at home and abroad. Among them, Datong, Shanxi Province has a history of more than 600 years of yellow flower cultivatio...

AI Technical Summary

Problems solved by technology

Among them, although the division propagation method is simple to operate and does not require seedling cultivation, the reproduction rate is the lowest, which not only limits the expansion speed of good varieties, but also easily spreads stem rot diseases; although tissue culture can greatly shorten the seedling time and increase the reproduction coefficient, it is useful. It is beneficial to maintain the excellent traits of the variety, but it has strict requirements on environmental conditions, difficult operation, high cost, and it is difficult to popularize and apply in production; the cutting method can use flower cymbals and shortened stems as materials: flower cymbal cuttings are easy to operate, but time is limited It can only be carried out when the flower buds are still green after the flower buds are harvested, and the emergence rate is low, and the success rate is not high; shortened stem cuttings are mainly based on the buds on the rhizomes of Datong daylily. The cutting propagation method is based on the position of the buds (main buds, side buds, and hidden buds) on the day lily bud sheet for cutting and propagation. Specifically, it can be divided into bud block propagation, slice propagation and division bud propagation.

However, due to the difficulty of identifying the location of cryptobuds before germination, the technical requirements are high, and the cutting results in large buds / pieces with large wounds and small vegetative bodies, which affects the quality of bud germination and seedlings, and is also prone to root infection.

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