Double-cut surface high-low level joint grafting technology for Torreya grandis

Abstract

The invention discloses a double-cut surface high-low level joint grafting technology for Torreya grandis. The joint grafting technology is a new grafting method that the long cut surface of a stock is inwards cut bias from bottom to top to the truncation surface, and moreover, the root of the long cut surface of the stock is vertically cut downwards along the part between bark and xylem to form the short cut of the stock; the long cut surface of a scion and the long cut surface of the stock are grafted in a joint manner; the short cut surface of the scion is inserted into the short cut of the stock, and thus, not only is the conjunction degree of the scion and the stock high, are the scion and the stock high more tightly and is the healing power stronger but also the scion is basically vertical upwards, and crown inclination cannot occur after the scion survives; only branches, a terminal bud and 4-5 leaves of the scion are kept, so that the transpiration of the blades is reduced, and the moisture loss is reduced. According to the joint grafting technology disclosed by the invention, only the terminal bud, which is about 1cm, of the scion is kept, and thus, the distance from the stock to the terminal bud is shortened, the sprouting capability of the terminal bud is enhanced, and the grafting survival rate reaches up to 98 percent. A Torreya grandis grafted plant is upright; the crown does not incline; the grouting capability is strong; the crown can be rapidly formed.

Description

technical field [0001] The invention relates to the grafting technology of torreya torreya, in particular to a technique of sticking and grafting high and low positions of double-cut surface of torreya torreya. Background technique [0002] Torreya ( Torreya grandis ) is a gymnosperm plant of the genus Torreya Arn (Taxaceae), an evergreen tree, dioecious. It is a multi-purpose precious tree species that is used for timber, medicine, fruit, oil, ornamental and greening. It is also a rare dried fruit and a high-quality and high-yield woody oil crop characteristic of Zhejiang Province. Torreya torreya is a variation type of torreya tree obtained through artificial cultivation. Grafting and raising seedlings is the main propagation method of torreya. Be the invention patent application of CN1887046 as publication number, just disclose the Chinese torreya sapling grafting technology, utilize the Chinese torreya sapling as stock, the lower half of the stem in the stock is obliq...

AI Technical Summary

Problems solved by technology

This grafting method only has the rootstock incision obliquely cut from top to bottom. Although the scion is double-cut, the degree of wedging between the scion branch and the rootstock incision is insufficient, and the scion is grafted obliquely, so it is easy to be partial crown after survival, affecting Growth after planting, and although the crown is kept for breeding, the scion branches compete with the rootstock for nutrients, and the survival rate is still low