Method for improving graft survival rate of holly

Abstract

The invention discloses a method for improving the graft survival rate of a holly, which comprises the following steps: from the last ten-day of February to the middle ten-day of March and 3 to 5 days before grafting, irrigating a grafting nursery with water once thoroughly; scissoring a twig of a variety to be grafted, which grows robustly with good buds and has a thickness of between 1 and 2 centimeters as a scion, using a grafting knife to cut obliquely once at a 1-centimeter part on the back of a scion bud to cut off 1/3 of a xylem and ensure that the inclined plane is about 2 centimeters in length, then cutting a small inclined plane on the back side of the inclined plane to cut off certain xylem slightly and ensure that the bevel of between 0.5 and 0.8 centimeter in length, and scissoring off the scion at the position of 1 to 2 centimeters above the bud; planting a Chinese holly selectively (without considering the stem height and the thickness), using a lateral branch twig of which the thickness is between 1 and 2 centimeters as a rootstock, using a pair of lopping shears to shear at the position of 5 to 6 centimeters above a bifurcation, selecting a smooth position around the rootstock bark, and cutting vertically downwards for about 2 centimeters at the smooth place with a slight xylem; inserting the scion into a cut of the rootstock so that cambiums on two sides of the long inclined plane of the scion are aligned with and abutted against the cambiums on two sides of the rootstock, and if the scion is thin, the scion is ensured to be aligned with the cambiums on one side of the rootstock; fastening and sealing the cut by a plastic strip at an inserting opening from top to bottom; watering the interface with a watering pot, and sleeving a plastic bag on the cut so as to seal the cut and preserve moisture; building a shading net for sun-shading and temperature reduction at a position 2 meters above the nursery; and removing the plastic bag sleeved outside.

Description

technical field [0001] The invention belongs to the field of tree breeding and relates to a method for improving the survival rate of holly grafting. Background technique [0002] Ilex seeds have thick seed coats and immature embryos, so the germination rate of sowing seedlings is not only very low (0-50%), but also takes a long time to germinate. It will take two years or even longer to germinate, and the growth is very slow, so the seeds Breeding is very difficult. At present, most commercial holly seedlings are propagated by grafting with the easy-to-propagate large seedlings of Chinese wolfberry as stock. However, due to the influence of many factors, the survival rate of grafting is often very low, generally 30-50%. Difficulty in breeding not only restricts the development of Ilex seedlings, but also causes two disadvantages, one is multiple grafting, the cultivation cycle of commercial seedlings becomes longer, and the cost of seedlings is greatly increased; the other...

AI Technical Summary

Problems solved by technology

[0003] The technical problem to be solved by the present invention is to provide a method for improving the survival rate of holly grafting, so as to overcome the shortcomings of long cultivation period and high seedling cost of commercial seedlings caused by the traditional grafting mode