Method for improving reproduction efficiency of catalpa bungei grafted seedlings

Abstract

The invention discloses a method for improving the reproduction efficiency of catalpa bungei grafted seedlings and relates to the field of forest elite reproduction. The method comprises the steps that firstly, catalpa ovata grafting stocks are cultivated through the sowing and seedling raising mode, catalpa bungei grafting is conducted by bud grafting annual catalpa ovata stocks provided with xylem, after the grafting, twig cuttage is conducted on remaining catalpa ovata stocks, so that grafting-used stocks are cultivated, and the catalpa ovata stocks can be used as catalpa bungei bud-grafting stocks in June of the next year. Compared with a conventional method of cultivating stocks through sowing and seedling raising, the cycle is shortened by one year, by means of the method of reproducing the catalpa ovata stocks through cuttage simultaneously, catalpa ovata stem segments which are cut away in the grafting process are utilized sufficiently, resource waste is avoided, meanwhile, the seedling raising cost is reduced, the seedling raising efficiency is improved, the catalpa ovata stocks can be circularly applied to catalpa bungei grafting and reproduction in the future, rapid cultivation and efficient utilization of the stocks are achieved, the catalpa bungei grafting and reproduction efficiency is greatly improved, the seedling raising cycle is short, and the survival rate is high.

Description

technical field [0001] The invention relates to the field of forest tree seed breeding, in particular to a method for improving the propagation efficiency of catalpa tree grafting and raising seedlings. Background technique [0002] Catalpa (Catalpabungei C.A.Meyer.) belongs to the Bignoniaceae family and belongs to the genus Catalpa. It has been cultivated in my country for more than 2,000 years. It is a precious and high-quality timber tree species and a valuable garden ornamental tree species in my country. It has been included in the national strategic timber reserve. tree species directory. Due to the incompatibility of self-pollination, catalpa often blooms and does not bear fruit; even if different clones are mixed together, they can bear fruit after pollination by insects, but there are few seeds, the germination rate of seeds is very low, and seed reproduction is difficult. Catalpa is a tree species that is difficult to root, and the survival rate of cutting propaga...

AI Technical Summary

Problems solved by technology

Due to the incompatibility of self-pollination, catalpa often blooms and does not bear fruit; even if different clones are mixed together, they can bear fruit after pollination by insects, but there are few seeds, the germination rate of seeds is very low, and seed reproduction is difficult

Catalpa is a tree species that is difficult to root, and the survival rate of cutting propagation is low, and the existing related cutting technology is not easy to be popularized and applied in actual production due to high operation requirements, or the need for facility conditions, or labor-intensive and high cost

Although root burial propagation is relatively easy, root burial propagation objectively restricts the scale of breeding because of its relatively small number of propagation materials.

Although tissue culture reproduces quickly, it requires a large investment in equipment conditions, high technical requirements, and high production costs.

At present, the seedlings of catalpa are mainly used as rootstocks for grafting and propagation to cultivate good seedlings of catalpa, but rootstocks must first be cultivated for grafting. At present, rootstocks are mostly cultivated by catalpa seedlings in production, but it takes at least 2 years after sowing to achieve The thickness required for grafting rootstock has the disadvantage of long production cycle for rootstock cultivation

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