Rapid cutting propagation method of crape myrtle single-plant germplasm

Abstract

The invention discloses a rapid cutting propagation method of crape myrtle single-plant germplasm. On the basis that crape myrtle single plants with the good characters of the natural tree type, flowering habit, flower color and flower diameter size and the like are surveyed and screened out, incising and sprouting promotion is performed on optimized single-plant rootstock portions or purging and sprouting promotion is performed on the surface soil layer lateral roots to form young root sucker coppice shoots at the developmental stage, the coppice shoots are used for ear making and cutting propagation, cutting seedlings are used for building a cutting orchard, cutting orchard building and management are performed by routine, scion wood is completely collected and processed on the base of the trunk of the stock plant to promote sprouting and cultivation of coppice shoots, the standard quality of ear cutting and making is strictly regulated, the cutting seedbed matrix arrangement is simplified, rooting accelerator arrangement and using method are optimized, limitation of the cutting season is broken through, rapid long-term large-scale cutting seedling is achieved, the cutting survival rate and nursery stock quality are improved, and the cutting seedling cost is lowered.

Description

technical field [0001] The invention belongs to the technical field of plant cultivation, and in particular relates to a rapid cutting propagation method for a single germplasm of Lagerstroemia indica. Background technique [0002] Lagerstroemia indica L. is a plant of the genus Lagerstroemia in the Lythraceae family. It belongs to deciduous shrubs, small trees or trees. Its tree shape is beautiful, its bark is smooth and clean, its branches are twisted, its flowers are dense and colorful, And the flowering period is long, and it is a flower and tree with great ornamental value in summer and autumn. According to the International Botanical Names Index, there are currently nearly 80 species of Lagerstroemia in the world, and the species, varieties, subvarieties, country of origin and original documents are listed in detail (Zhang Jie, 2007), mainly distributed in eastern and southeastern Asia , southern tropical and subtropical regions and Oceania, my country has 18 species o...

AI Technical Summary

Problems solved by technology

[0004] However, in recent years, the natural forest resources of Lagerstroemia crape myrtle are increasingly scarce due to over-excavation and utilization, and the natural population has shrunk sharply. It is urgent to carry out research on the status of natural populations, the collection and preservation of excellent germplasm, and the mining, development and utilization of germplasm resources to achieve effective utilization of germplasm resources. Genetic conservation and development and utilization of excellent germplasm; second, the artificially planted crape myrtle germplasm is mixed, and most of them are propagated by seeds, and the main ornamental traits such as tree type, flower color and flower diameter vary greatly, and the landscape effect is not ideal; the third is artificial planting. Lagerstroemia species are generally sensitive to pests and diseases, and are prone to outbreaks. Lagerstroemia indica, sooty mildew, powdery mildew, aphids, scale insects, and mealybugs occur seriously. A series of technical measures including selection of fine germplasm (strains, single plants), asexual reproduction, site selection, pruning, fertilization, water management, horticultural modeling, etc.

[0005] At present, cutting propagation is the main method for the propagation and application of Lagerstroemia myrtle excellent germplasm (strains and excellent individual plant materials), and there are many reports on related experimental studies, but none of them are systematic and complete. The application of large-scale propagation is mainly reflected in: the source of spikes is not standardized, which may easily cause poor growth or degradation of seedlings, and the requirements for cutting substrate configuration are strict and complicated (for example, a layer of peat, or perlite, or vermiculite, or river sand, or yellow core soil, or sawdust, or rice bran, etc., or 1 or 2 kinds or combinations thereof), or there are specific requirements for the degree of lignification of cuttings, limited by seasons, or the survival rate is unstable, Or the slotting bed cannot be used continuously or the substrate needs to be replaced every crop, so it is impossible to realize the perennial large-scale cutting propagation, the propagation speed is slow, and the cost of seedling cultivation is high

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