Method for breeding tetraplont locust plantlets utilizing combination of hardwood cutting and root segment seedling

Abstract

The invention discloses a method for breeding tetraplont locust own-rooted plantlets by means of hardwood cutting; in the invention, a root nursery is established by planting the own-rooted plantlets,well-bred roots are collected as breeding materials, and a plant growth regulator is added in a matching manner to realize asexual reproduction of the tetraplont locust in large scale. The method obtains the tetraplont locust own-rooted plantlets by tissue culture or hardwood cutting; the own-rooted plantlets are planted to form the root nursery; and the fertilizer and water management of the root nursery is strengthened to accelerate the growth of the plantlets. After two years, multitudinous root segments can be provided every year; the robust root systems of which root diameters reach 0.3cm are screened in the root system collection in spring, then the root systems are pruned into root segments with a length of 5-6cm and planted in a seeding nursery; and most plantlets grew in currentyear can be as high as 1.0m and the ground diameter can reach 0.8cm, which can be used for forestation. The method for breeding tetraplont locust plantlets has the advantages of simple operation, reasonable design and remarkable effect and greatly improves the breeding efficiency of well-bred tetraplont locust plantlets.

Description

technical field [0001] The invention belongs to the field of vegetative propagation of seedlings of fine varieties of forest trees, and specifically relates to the method of obtaining self-rooted seedlings of tetraploid Robinia pseudoacacia through cutting of hard branches, establishing a root nursery with the self-rooted seedlings, and then using the collected roots of fine varieties as propagation The material is used in conjunction with a plant growth regulator to realize a production method for large-scale asexual reproduction of tetraploid Robinia pseudoacacia. Background technique [0002] Black locust (Robinia pseudoacaia L) is a deciduous tree of Papilionaceae, native to the Appalachian Mountains and Oak Mountains in the eastern United States. This tree species is temperature-loving, drought-tolerant, stress-resistant, adaptable, and grows rapidly; the material is tough, the texture is fine, elastic, water-resistant, and decay-resistant. Nectar plants. It was intro...

AI Technical Summary

Problems solved by technology

Tissue culture requires aseptic conditions for medium preparation, sterilization, inoculation, and cultivation, as well as a fully automatic greenhouse with adjustable temperature and humidity for seedling hardening and transplanting, and professional operating techniques. The investment is large, the production cost is high, and constraints Promote the promotion of fine varieties of forest trees

The grafting method requires rootstock seedlings to be cultivated one year in advance, and the seedling cultivation period is long, and the cultivated seedlings have "little feet" due to the difference in growth speed between the rootstock and the scion, which is easy to cause wind breaks and dry shape after planting.