CN103004477A - Fast-growth cultivation method of top-grafting gold-leaf goldenrain tree - Google Patents

Abstract

The invention discloses a fast-growing cultivation method for high-grafting golden-leaf eucalyptus, which comprises the following steps: 1) selecting rootstocks of Beijing eucalyptus with a height of more than 3.2m in the first year in late summer and early autumn; 2) grafting at a height of 3.0m The annual branches or buds of the golden leaf eucalyptus; 3) In the spring and summer of the second year, remove the side branches at the height of 0-1.8m and 2.8m-3.0m, and keep the side branches at the position of 1.8-2.8m; 4) In the summer of the second year, Pull the side branches with a height of 1.8-2.8m; 5) When the diameter of the rootstock reaches 5.0cm, cut off the side branches below 2.8m year by year from bottom to top. The invention has the following advantages: 1) The original tree crown is not completely removed, and there is no tree crown and tree vigor recovery period; 2) A large number of green leaves are kept, and the nutrition produced accelerates the growth rate; 3) The side branches of the rootstock are pulled, so that the side branches do not affect the scion The crown shape of the tree also increases the sunlight receiving area and accelerates the growth of plants.

Description

A method for fast-growing cultivation of high-grained golden-leaf eucalyptus

technical field

The invention relates to the field of plant cultivation, in particular to a method for fast-growing high-grained eucalyptus eucalyptus.

Background technique

Golden leaf eucalyptus is a bud variety of Beijing eucalyptus. The new shoots and tree crowns are red. After May, the leaves turn golden and stable in character. It has high affinity and is very easy to survive grafting. The phenomenon of allogeneic rejection is not obvious. A good variety of colorful leaf garden trees.

The golden-leaf eucalyptus is generally propagated by grafting. The traditional method of grafting the golden-leaf eucalyptus is to remove the crown of the big tree for high grafting or to carry out the root grafting of 1-2 year old seedlings. The following problems exist respectively: ①When the big tree removes the crown for high grafting , Removing the green canopy and connecting the trees is not only a huge loss of resources, but also a serious trauma. The tree body suddenly loses its nutrient supply, and its growth potential will inevitably drop sharply. The nutrition produced by the new yellow leaves alone is far from enough for the tree body Especially the nutrient requirements of the original huge root system, the recovery of the crown and tree vigor will take a long time; ② When the roots of 1-2 year old seedlings are grafted at the bottom, because the new yellow leaves after grafting contain less chlorophyll, the photosynthetic ability is relatively low. Poor, the roots of the seedlings are low and the growth rate of the saplings grown is much slower than that of the original species.

Contents of the invention

Aiming at the problems of poor plant photosynthetic ability and lack of nutrient supply existing in the existing methods for grafting golden-leaf eucalyptus, the present invention aims to provide a method for high-grafting golden-leaf eucalyptus fast-growing cultivation.

The method for the fast-growing cultivation of high-grained eucalyptus eucalyptus provided by the invention comprises the steps:

1) At the end of summer and early autumn of the first year, choose Beijing eucalyptus saplings with a height of more than 3.2m and well-developed side branches and root systems below 3.2m as rootstocks;

2) Graft the annual branches or buds of robust golden leaf eucalyptus at a tree height of 3.0m;

3) In the spring and summer of the second year, remove the side branches at the tree height of 0-1.8m and 2.8m-3.0m, and keep the side branches at the tree height of 1.8-2.8m;

4) In the summer of the second year, pull the side branches at a height of 1.8-2.8m, so that the angle between the side branches and the trunk is within the range of 45°~90°, and keep the side branches from touching the crown of the scion;

5) When the diameter of the rootstock reaches 5.0cm, cut off the side branches below 2.8m year by year from bottom to top.

Wherein, the grafting in step 2) adopts conventional grafting methods, such as bark grafting method, bud grafting method, etc. It is preferred to use the method of grafting grafting in the spring of the second year to graft robust annual branches of the golden-leaf eucalyptus, or after the beginning of autumn in the first year. The bud grafting method is to graft the annual buds of the robust golden leaf eucalyptus.

If bud grafting is used, after the eucalyptus germinates in the second spring, remove the trunk above the grafting site so that the scion is at the highest position.

The advantages of the present invention are:

1. Due to step 3)-step 4), the side branches at the plant height of 1.8~2.8m are preserved, and the side branches are cut off year by year from bottom to top until the diameter of the golden leaf eucalyptus plant reaches the requirement, which has little effect on the tree vigor, which is different from the traditional Compared with the high-level connection, there is no crown and tree vigor recovery period.

2. The side branches at the plant height of 1.8~2.8m are preserved, and the large amount of nutrients produced by the green leaves with strong photosynthesis in this part will be continuously provided to the trunk, roots, and even to the new scion with weak photosynthetic ability after grafting Crowns of yellow leaves, which speed up the growth of grafted eucalyptus.

3. Pull the side branches of the rootstock sideways to keep the side branches and the trunk of the tree at 45°~90°, which will not only increase the distance between the side branches and the new crown, so that the side branches will not affect the crown shape of the golden leaf crown formed by the grafted buds, It will also increase the sunlight receiving area of the plant, produce more nutrients, and accelerate the growth rate of the plant.

Detailed ways

The following examples are used to illustrate the present invention, but are not intended to limit the scope of the present invention.

Embodiment 1 uses traditional high grafting method to graft golden leaf eucalyptus

In late August 2010, in Shijiazhuang, 10 Beijing eucalyptus rootstocks with an average diameter at breast height of 3.3m and an average tree height of 3.5m, with well-developed side branches and root systems below 3.2m were selected, and golden leaves were grafted at a height of 3.0m by bud grafting. Luan tree robust buds.

In the spring of 2011, the trunk above the grafting site was removed.

From 2010 to 2012, the side branches below the grafting site were continuously removed, and only the golden leaf crown was kept.

By the first ten days of September 2012, the average rootstock diameter was 4.0 cm, and the diameter increased by 0.7 cm.

Embodiment 2 uses the method of the present invention to graft golden leaf eucalyptus

In late August 2010, in Shijiazhuang, 10 Beijing eucalyptus rootstocks with an average diameter at breast height of 3.2m and an average tree height of 3.4m, with well-developed side branches and root systems below 3.2m were selected, and golden leaves were grafted at a height of 3.0m by bud grafting. Luan tree robust buds.

In the spring of 2011, the trunk above the grafting site was removed.

At the beginning of June and the end of August 2011, the side branches at the tree height of 0-1.8m and the tree height of 2.8m-3.0m were removed, and the side branches at the height of 1.8-2.8m were pulled horizontally.

In the first ten days of September 2012, the average rootstock diameter was 5.1 cm, and the diameter increased by 1.9 cm. From now on, cut off side branches below 2.8m year by year from bottom to top.

This shows that adopting the method of the present invention to graft golden-leaf eucalyptus compared with traditional high grafting, the growth rate of trees after grafting 2 years is far beyond the latter.

The above is only a preferred embodiment of the present invention, it should be pointed out that for those of ordinary skill in the art, without departing from the technical principle of the present invention, some improvements and modifications can also be made. These improvements and modifications It should also be regarded as the protection scope of the present invention.

Claims (4)

1. a method for fast-growing cultivation of high-grained eucalyptus eucalyptus comprises the steps: 1) In the late summer and early autumn of the first year, select eucalyptus saplings with a height of more than 3.2m as rootstocks; 2) Graft the annual branches or buds of robust golden leaf eucalyptus at a tree height of 3.0m; 3) In the spring and summer of the second year, remove the side branches at the tree height of 0-1.8m and 2.8m-3.0m, and keep the side branches at the tree height of 1.8-2.8m; 4) In the summer of the second year, pull the side branches at a height of 1.8-2.8m, so that the angle between the side branches and the trunk is within the range of 45°~90°, and keep the side branches from touching the crown of the scion; 5) When the diameter of the rootstock reaches 5.0cm, cut off the side branches below 2.8m year by year from bottom to top. 2. The method according to claim 1, characterized in that, the grafting in step 2) adopts a conventional grafting method, specifically grafting a robust annual branch of the golden-leaf eucalyptus in the spring of the second year, or in the first year After the beginning of autumn, the annual buds of the strong golden leaf eucalyptus are grafted by bud grafting. 3. method according to claim 2, is characterized in that, when adopting budding method, after the eucalyptus germinates in spring of the second year, remove the trunk above the grafting site. 4. the application of the method described in any one of claim 1-3 in the golden leaf eucalyptus cultivation.