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CN-121970621-A - High-altitude layering method for efficient rooting of apocarya variety seedling branches

CN121970621ACN 121970621 ACN121970621 ACN 121970621ACN-121970621-A

Abstract

The invention discloses a high-altitude layering method for efficient rooting of branches of apocarya varieties, and belongs to the technical field of apocarya asexual propagation. The method selects the growing season of the apocarya to carry out high-altitude layering so as to promote rooting, effectively inhibits the repair and differentiation process of wound tissues to the direction of cortex by cutting off xylem tissues with the thickness of 1-3 mm at the girdling opening, and coats rooting agent at the girdling opening so as to obviously improve the formation efficiency and quantity of root systems, and finally adopts a matrix containing a certain amount of garden soil to wrap so as to promote rooting, thereby solving the technical problem that the apocarya seedlings are difficult to root and realizing the mass production of the seedlings. The rooting rate of the method can reach more than 90 percent, and the rooting number can reach more than 20 roots/branch.

Inventors

  • MO ZHENGHAI
  • ZHAI MIN
  • HU LONGJIAO
  • XUAN JIPING
  • WANG GUOMING
  • JIA ZHANHUI

Assignees

  • 江苏省中国科学院植物研究所

Dates

Publication Date
20260505
Application Date
20260128

Claims (10)

  1. 1. A high-altitude layering method for efficient rooting of branches of apocarya varieties is characterized by comprising the steps of selecting layering time, selecting branches, girdling the branches, cutting off part of xylem tissues, smearing rooting agent, wrapping matrix and managing after layering; The layering time is 6-7 months; The cutting thickness of the part of xylem tissue is 1-3 mm; The matrix consists of garden soil, humus and perlite.
  2. 2. The high-altitude layering method for efficient rooting of apocarya seedling branches according to claim 1, wherein the selecting of the branches comprises selecting branches without plant diseases and insect pests on parent trees of apocarya with 2-6 years old.
  3. 3. The high-altitude layering method for efficient rooting of branches of apocarya varieties according to claim 2, wherein the branches are 1a or more in age and 1-2 cm in thickness and are located in a position of a shade.
  4. 4. The high-altitude layering method for efficient rooting of apocarya seedling branches according to claim 1, wherein the girdling width is 4-6 cm.
  5. 5. The high-altitude layering method for efficient rooting of branches of apocarya varieties according to claim 1, wherein the cutting mode of the partial xylem tissue is annular cutting.
  6. 6. The high-altitude layering method for efficient rooting of apocarya seedling branches according to claim 1, wherein the applying of the rooting agent comprises the step of applying the rooting agent to the girdling port and cortex tissues 2-3 cm above the girdling port.
  7. 7. The high-altitude layering method for efficient rooting of apocarya seedling branches is characterized in that the rooting agent comprises talcum powder, potassium indolebutyrate and sodium naphthylacetate, and the mass ratio of the talcum powder to the potassium indolebutyrate to the sodium naphthylacetate is 100 (0.1-0.3) to 0.05.
  8. 8. The high-altitude layering method for efficient rooting of apocarya seedling branches according to claim 1, wherein the volume ratio of garden soil to humus to perlite is (1-2) 1:1.
  9. 9. The high-altitude layering method for efficient rooting of apocarya seedling branches according to claim 1, wherein the matrix wrapping comprises placing the matrix in a layering box, wrapping a girdling opening after watering thoroughly with water, and then binding the layering box.
  10. 10. The high-altitude layering method for efficient rooting of apocarya seedling branches according to claim 9, wherein layering post-treatment comprises normal maintenance of parent trees, regular checking of matrix moisture conditions in layering boxes, and timely water supplementing if dried.

Description

High-altitude layering method for efficient rooting of apocarya variety seedling branches Technical Field The invention belongs to the technical field of apocarya asexual propagation, and particularly relates to a high-altitude layering method for efficient rooting of apocarya variety seedling branches. Background The apocarya (Carya illinoinensis) is excellent woody oil and nut tree species and has higher edible, oil-use, material-use and landscape values. The fruit is thin in shell, high in kernel yield, thick in kernel, tender in texture, nutritious and delicious, and rich in zinc and manganese elements required by brain development, is an ideal leisure health-care food, and is deeply favored by consumers. Apocarya is also an important woody oil crop, the content of nutlet grease is up to 70%, and more than 85% of grease is unsaturated fatty acid beneficial to human health. Meanwhile, the apocarya is also an excellent wood species, has the advantages of straight and dry shape, tough material, compact texture, wear resistance and elasticity, can support continuous vibration, is a high-grade wood for pianos, furniture, sports equipment and the like, and belongs to a kind of walnut. In addition, in landscaping, the apocarya can be used as an upper backbone tree species. The seedling is the material basis and the primary condition for the large-scale planting of the apocarya. At present, the tree species are propagated mainly in a grafting mode. However, the cultivation of grafted seedlings usually requires 3a (years) of time (stock cultivation 2a+scion growth 1 a) or longer (the grafting survival rate of partial varieties is low, and many times of grafting are needed for many years), so that the mode has the defects of long production period, time and labor consumption, high cost and the like. In the forestry production, cutting is another widely adopted asexual propagation technology, which is a technology for cultivating the nutrient bodies such as roots, stems, leaves and the like of the cut parent plants into complete plants under certain conditions based on totipotency of plant cells. However, apocarya is a tree species which is very difficult to root by cutting, and has obvious age effect, namely the adventitious root occurrence capacity of apocarya is obviously reduced or even completely lost along with the growth of the tree age. The apocarya has a childhood of 8-10 a, and branches in an adult region almost lose rooting capacity. At present, shoots of seedlings grown in 1-2 years are used as cutting slips to induce rooting, but seedlings cannot root. For a long time, the difficulty in rooting of the seedlings of the apocarya is always an unbroken bottleneck. The high-altitude layering is an important asexual propagation means in plant breeding. Compared with grafting and cutting propagation methods, the high-altitude layering propagation method has the advantages of simplicity in operation and low cost, and is particularly suitable for woody plants which are difficult to root. In general, the layering process includes girdling or cutting branches, wrapping matrix, post-layering management and the like. The layering technology is applied to propagation of azalea (CN 113348887A), mango (CN 107371752A), crabapple (CN 103636390A) and the like, but the application of the layering technology to apocarya seedlings is not seen. The reason for this is probably that the development stage of the apocarya seedling branches is reached, the young state characteristics are lost, the seedling branches are difficult to redifferentiate, and special induction conditions are needed. Disclosure of Invention Aiming at the current situation that the apocarya variety self-rooting seedling is difficult to obtain at present, the invention provides a high-altitude layering method for efficient rooting of apocarya variety seedling branches. The rooting rate of the method can reach more than 90 percent, the rooting number can reach more than 20 roots/branch, and the important breakthrough of asexual propagation of good varieties is realized. In order to achieve the above purpose, the present invention provides the following technical solutions: The invention provides a high-altitude layering method for efficient rooting of branches of apocarya varieties, which comprises the steps of selecting layering time, selecting branches, girdling the branches, cutting off part of xylem tissues, smearing rooting agent, wrapping matrix and managing after layering; The layering time is 6-7 months; The cutting thickness of the part of xylem tissue is 1-3 mm; The matrix consists of garden soil, humus and perlite. Further, selecting the branches comprises selecting branches which are grown for 2-6 years and have no plant diseases and insect pests and strong vigor on a parent tree of the apocarya variety. Further, the branches are aged to be more than 1a, have a thickness of 1-2 cm and are positioned at the position of the back yin. Further, the