Method for building old gingko tree excellent clonal seed orchard

Abstract

The invention discloses a method for building an old gingko tree excellent clonal seed orchard. A rejuvenation cion grafting method is adopted for building the old gingko tree clonal seed orchard to produce high-quality seeds. The characteristic that the gingko branch is easy to survive through grafting is utilized, the fast-growing, high-yield and high-quality female plant branches of old gingko trees are collected to build the clonal seed orchard through grafting, the branches of seed trees are firstly grafted to triennial seedlings for rejuvenation, then rejuvenated annuus cions are taken to be grafted to remove the Topophysis and the Cyclophysis, and the aims of gingko greening, materials, nuclear nursery stock seed quality improvement and base production are achieved. According to the method, the old gingko tree clonal seed orchard is built based on the rejuvenation old tree cion-tongue grafting technology, the operation is easy, and the method is practical.

Description

technical field [0001] The invention belongs to the technical field of producing improved tree species, in particular to a method for establishing a seed orchard of excellent clones of ancient ginkgo trees. Background technique [0002] Ginkgo biloba (Ginkgo biloba L.) belongs to the Ginkgo family, Ginkgo genus, deciduous trees. It is a relic plant preserved after the Quaternary glaciers. It is called a "living fossil" and belongs to the rare plant under the second-class protection of the country. The ancient ginkgo tree is a "national treasure" of our country and the link between history and reality. The ancient ginkgo tree resource is a precious germplasm resource bank with important economic, ecological and social values. At present, there are mainly the following problems in the cultivation of ginkgo timber forests and landscaping seedlings: (1) there is no primary seed garden, and special improved seeds for landscaping and timber forests cannot be provided; (2) convent...

AI Technical Summary

Problems solved by technology

At present, there are mainly the following problems in the cultivation of ginkgo timber forests and landscaping seedlings: (1) there is no primary seed garden, and special improved seeds for landscaping and timber forests cannot be provided; (2) conventional grafted seedlings cannot It is beneficial to the dryness and tree shape development of ginkgo, drawing on the experience of foreign pine tree seed gardens, the greening of ginkgo roads and timber forests should follow the "selection of excellent trees and sexual utilization"; (3) The survival rate of direct grafting of old tree scions is low and the growth is slow

Also do not see the report of setting up ginkgo ancient tree clone seed garden at present, the present invention proposes under such technical background