Method for propagating Taxus madia nursery stocks

Abstract

The invention discloses a method for propagating Taxus madia nursery stocks. The method comprises the steps of (1) preparing a sterile fine-sand seed bed and setting up a shading shed; (2) mixing turf with perlite in the proportion of 6:4 to prepare matrix nutrition cups; (3) matrix nutrition cups are evenly spaced and placed on the seed bed and sterilized fully; (4) selecting branches of Taxus madia plants of three to four year olds in spring or in autumn for cuttage in nutrition cups; and (5) keeping the temperature of the seed bed to be within a range of 18-30 DEG C and the humidity to be 65-70%, spraying foliage fertilizer for the first time after 9-10 days, spraying the foliage fertilizer once every 7-10 days during the fast-growing period of nursery stocks, cutting roots by air or breaking roots through movement of nutrition cups, stopping spraying the foliage fertilizer when most of roots grow, and then hardening seedlings till the next spring to conduct large field transplantation. According to the method, propagated Taxus madia nursery stock roots are balanced, neat and robust, the rate of survival exceed 96%, the seedling rate exceed 95%, the survival rate of transplanting can achieve 98%, and industrialized production can be achieved.

Description

technical field [0001] The invention belongs to a breeding method for plant seedlings, and in particular relates to a breeding method for yew mandia seedlings. Background technique [0002] The medicinal value and economic value of yew are very high, and it belongs to the rare and endangered species in the world. In order to save this species and make full use of its value, people have carried out research on the seedling breeding of yew. For example, the Chinese patent publication No. CN1711826A A Chinese patent with the publication number CN 101982050A of "the method of breeding and raising seedlings of Taxus chinensis" discloses a "method of vegetative propagation of Taxus chinensis" and a Chinese patent with the publication number of CN 101663946A discloses a kind of "Chinese taxus chinensis" with the publication number CN 101663946A. Cutting propagation method" and so on. In the disclosed method, cutting seedlings is the basis of the seedling breeding, and its common f...

AI Technical Summary

Problems solved by technology

The above method has played a very good effect on saving the yew species, but it is not ideal for the large-scale breeding of the yew

Experiments have shown that the existing seedling breeding methods of Taxus chinensis have the following deficiencies: the root system of the seedlings is poorly developed, the survival rate is only 85%, the rate of emergence from the nursery is not more than 80%, and the survival rate of bare-root seedling transplanting is only about 60%. In bad weather, the survival rate is even lower than 40%

Trace it to its cause: (1) because the main root of Taxus chinensis is not obvious and the fibrous roots are more developed, its fibrous roots grow densely with tiny transparent root hairs, and the root hairs are very easy to inactivate, and the prior art needs to remove the seedlings when the seedlings go out of the nursery. Excavation will inevitably cause certain damage to the root system in the process of seedling raising, transportation, and planting, which will naturally reduce the survival rate of planting and the growth of the year; (2) The root system of cutting seedlings has been growing in the substrate or natural condition soil, Unable to fully contact the air, unbalanced root development, uneven length, and irregular root caps are very common, which affects the quality of transplanted seedlings. After transplanting, the slow seedling period is long, the growth is weak, and the biological output is low; (3) Planting is limited by seasons, and can only be transplanted in spring and autumn. The time for afforestation or nursery building is short, and large-scale transplanting is not possible, which is not conducive to large-scale and factory production.