Method for forming weeping silver birch by grafting ground cover silver birch

A technology for ground cover silver birch and weeping branches, applied in the field of asexual reproduction of ornamental plants, can solve the problems of plant death, loss of vitality, water intolerance, etc., and achieve the effects of expanding the planting range, long flowering period and large amount of flowers

Inactive Publication Date: 2016-10-19
RES INST OF TROPICAL FORESTRY CHINESE ACAD OF FORESTRY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the drought and lack of rain in the original habitat of the ground cover silver birch, it is not water-tolerant and shade-tolerant, and its roots lose vitality due to water immersion, resulting in plant death.

Method used

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  • Method for forming weeping silver birch by grafting ground cover silver birch

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0052] Example 1 Effects of different seasons on the survival rate of grafting

[0053] The ground cover silver birch copper vine (G.Bronze Rambler) was used as the scion, and experiments were carried out on the survival rate of grafting in different seasons represented by spring, summer and autumn. The survival rate in summer is 33.7%, and the survival rate in autumn is the lowest. In spring in Guangzhou, due to too much rain, the survival rate of grafting is unstable. In March 2013, it rained two days after grafting, which affected the survival rate. In April 2014, the weather was sunny for more than 5 consecutive days after grafting, and the survival rate of grafting was significantly higher than that in March 2013 (Table 1).

[0054] Table 1 Grafting survival rate in different seasons

Embodiment 2

[0055] Example 2 The effect of storage time on the survival rate of grafted cuttings after collection

[0056] The ground cover G. Bronze Rambler and G. cooroora cascade were used as scions to study the effect of storage time on the survival rate of grafted cuttings.

[0057] The results of the study are shown in Table 2. It can be seen from Table 2 that the grafting of ground cover silver birch should adopt the method of harvesting and grafting, and the survival rate can reach up to 22.2%. , Water conservation measures, it is best to complete the grafting on the same day and the next day. With the increase of storage time, the survival rate continues to decline. The second and third days of grafting are of little significance. survive.

[0058] Table 2 Effect of scion storage time on graft survival rate

Embodiment 3

[0059] Example 3 Effect of spike type on grafting survival rate

[0060] Three scion types are selected for ground cover silver birch grafting (see figure 1 and Table 3), select the scion with axillary bud growth and keep all the axillary buds (see figure 1 C and Table 3) Grafting works best. Especially with the ground cover silver birch crown (G. Royal mantel) as the scion, select the scion with axillary bud growth and retain all the axillary buds (see figure 1 C) Than the scion with pruned part of the axillary buds (see figure 1 b) The survival rate of grafted grafts was 2.6 times higher than that of grafts with ungrown axillary buds (see figure 1 A) Improvement by 5.5 times (see Table 3).

[0061] Table 3 Effect of scion type on survival rate

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Abstract

The invention discloses a method for obtaining dropping shoot type grevillea robusta by grafting grevillea baueri dwarf. According to the method, a G. Robusta A. Cunn seedling is selected as a stock, and stem cutting is carried out at the height ranging from 50 cm to 150 cm to obtain a graft union; a grevillea baueri dwarf branch with the length ranging from 20 cm to 30 cm is cut into scion with the length ranging from 5 cm to 7 cm, each scion comprises one section, and an axillary bud is remained; grafting can be carried out by adopting cleft graft. The grevillea baueri dwarf is resistant to draught and trimming, the flowers are beautiful, the flowering phase is long, and the grevillea baueri dwarf is not resistant to moist and can hardly be popularized and planted in the south China in a large scale. According to the method, the introduced grevillea baueri dwarf is first grafted to the G. Robusta A. Cunn with universal adaptability, and dropping shoot type grevillea robusta of different styles can be obtained by controlling the grafting heights, the dropping shoot type grevillea robusta is suitable for slope and garden landscaping and forestation in rocky mountains of China, the forestation tree species for protection slopes, barren mountains, and rocky mountains in south China are enriched greatly, and novel, rare and special landscape tree species are provided for landscaping.

Description

technical field [0001] The invention belongs to the technical field of asexual propagation of ornamental plants, and relates to a method for grafting ground silver birch to form a weeping silver birch. Background technique [0002] Silver birch (Grevillea) is an evergreen flowering plant in the Proteaceae family, native to Australia, New Guinea, New Caledonia, and Sulawesi in central Indonesia. The distribution range is wide, from tropical rainforest with annual rainfall of 3000mm to desert area with annual rainfall of 200mm, from alpine to coastal and arid inland. There are about 360 kinds of genotypes, and the varieties vary from ground cover silver birch less than 0.5m to 1-5m shrubs and trees up to 35m. [0003] The introduction and cultivation of silver birch in my country has a history of about 90 years, and the early introduction is mainly the tree silver birch (G. Robusta A. Cunn). In Yunnan Province, it is cultivated more in the subtropical and quasi-tropical area...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): A01G1/06
CPCA01G2/30
Inventor 裘珍飞曾炳山李湘阳刘英范春节
Owner RES INST OF TROPICAL FORESTRY CHINESE ACAD OF FORESTRY
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