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CN-122004057-A - Seedling raising method for promoting root growth of albizia julibrissin cutting seedlings

CN122004057ACN 122004057 ACN122004057 ACN 122004057ACN-122004057-A

Abstract

The invention relates to the technical field of planting of albizia julibrissin, in particular to a seedling raising method for promoting root system growth of albizia julibrissin cutting seedlings, which comprises the following steps of S1, cutting branch pretreatment, namely taking branches of a albizia julibrissin excellent plant, cutting all leaves on the branches, and reserving a plurality of sections as cutting branches; S2, inducing rooting treatment, namely cutting a cutting opening of the cutting branch, quickly immersing the cutting opening in an antioxidant solution for shaking for 5-10min, immersing the cutting opening of the cutting branch in a rooting inducer for 0.5-2h, wherein the rooting inducer comprises 150-300mg/L ABT, S3, performing cutting and planting, namely inserting the cutting branch in the step S2 into a prepared cutting matrix, wherein the cutting depth is 3-5cm, and the cutting branch is tightly attached to the matrix by using a light-pressure matrix, and S4, performing management after cutting. Compared with the prior art, the rooting inducer components obtained through the antioxidation solution and screening process the silktree albizia cutting branches, the time for forming stable root systems of the branches is shortened to 30 days, and the obtained root system configuration of the cutting seedlings is good.

Inventors

  • OU HANBIAO
  • MA JINMAN
  • LU QIUJIE
  • WEI LIXING
  • WANG ZHIHUI
  • LI JUAN
  • ZHANG YE
  • HUANG LIYA
  • ZHANG JING
  • LI YANLI
  • MENG XIN

Assignees

  • 广西壮族自治区林业科学研究院

Dates

Publication Date
20260512
Application Date
20260129

Claims (10)

  1. 1. The seedling raising method for promoting the root growth of the albizia julibrissin cutting seedlings is characterized by comprising the following steps of: S1, pretreatment of cutting branches, namely taking branches of a albizia julibrissin excellent plant, cutting all leaves on the branches, and reserving a plurality of knots as cutting branches; s2, inducing rooting treatment, namely cutting a cutting opening of the cutting branch, quickly immersing the cutting opening in an antioxidant solution for shaking for 5-10min, and immersing the cutting opening of the cutting branch in a rooting inducer for 0.5-2h, wherein the rooting inducer comprises 150-300mg/L ABT; S3, cutting and planting, namely inserting the cutting branches in the step S2 into the prepared cutting matrix, wherein the cutting depth is 3-5cm, and lightly pressing the matrix to enable the cutting branches to be tightly attached to the matrix; s4, managing after cutting.
  2. 2. The seedling raising method for promoting root growth of albizia julibrissin cutting seedlings according to claim 1, wherein in the step S2, the preparation method of the antioxidant solution is as follows: (1) Dissolving the weighed vitamin E with absolute ethyl alcohol to obtain a vitamin E solution for standby; (2) Adding the weighed quercetin into a beaker containing distilled water, stirring and dissolving, adding sodium sulfite into the beaker, and continuing stirring and dissolving; (3) And (3) adding the vitamin E solution into the beaker in the step (2), uniformly mixing, and fixing the volume to obtain the antioxidant solution.
  3. 3. The seedling raising method for promoting root growth of albizia julibrissin cutting seedlings according to claim 2, wherein in the antioxidation solution, the concentration of sodium sulfite is 0.3-0.5%, the concentration of quercetin is 0.25-0.45%, the concentration of vitamin E is 0.05-0.09% and the balance is water.
  4. 4. The seedling raising method for promoting root growth of cutting seedling of Albizia julibrissin according to claim 1, wherein in step S2, the rooting inducer further comprises boric acid, potassium dihydrogen phosphate, calcium pectate, inositol, vitamin B 1 and vitamin B 6 .
  5. 5. The seedling raising method for promoting root growth of albizia julibrissin cutting seedlings according to claim 4, wherein the rooting inducer comprises the components of 150-300mg/L ABT, 20-50mg/L boric acid, 30-50mg/L monopotassium phosphate, 10-60mg/L calcium pectate, 25-35mg/L inositol, 5-10mg/L vitamin B 1 and 5-10mg/L vitamin B 6 , and the pH value of the solution is adjusted to 5.5-6.5.
  6. 6. The seedling raising method for promoting root growth of albizia julibrissin cutting seedlings according to claim 5, wherein the rooting inducer further comprises 10-50mg/L quercetin, 50-70mg/L luteolin and 15-20mg/L jasmonic acid.
  7. 7. The seedling raising method for promoting root growth of albizia julibrissin cutting seedlings according to claim 6, wherein the rooting inducer component is obtained by the following method: (1) Performing factor analysis on root system configuration data processed by different hormones, and detecting KMO test metric values, wherein the root system configuration data comprises root length, root surface area, root volume, root average diameter, root tip number, root bifurcation number, root intersection number and fractal dimension; (2) When the KMO test metric value is greater than 0.8, performing principal component analysis, and extracting initial factors to obtain an initial factor load matrix; (3) Calculating corresponding feature vectors by using an initial factor load matrix, and multiplying the normalized data by the feature vectors to obtain principal component expressions F 1 and F 2 ; (4) Calculating a comprehensive score F according to the main component expressions F 1 and F 2 , wherein the comprehensive score F can be used for evaluating the root growth condition of the cutting branches of the albizia julibrissin; (5) And screening the rooting inducer component by using the comprehensive score F to ensure that the rooting inducer is treated to have optimal root growth on the silktree albizia cutting branches.
  8. 8. The seedling raising method for promoting root growth of albizia julibrissin cutting seedlings according to claim 7, wherein the seedling raising method comprises the following steps of F 1 =0.3842X 1 +0.4078X 2 +0.3801X 3 -0.1739X 4 +0.373X 5 +0.3797X 6 +0.366X 7 +0.3523X 8 , The F 2 =0.2794X 1 +0.0509X 2 -0.1486X 3 -0.7719X 4 +0.2995X 5 +0.2963X 6 +0.323X 7 -0.1429X 8 ,, wherein, X 1 is root length, X 2 is root surface area, X 3 is root volume, X 4 is root average diameter, X 5 is root tip number, X 6 is root bifurcation number, X 7 is root intersection number, and X 8 is fractal dimension; F= 0.7918F 1 +0.2082F 2 .
  9. 9. The seedling raising method for promoting root growth of albizia julibrissin cutting seedlings according to claim 1, wherein in the step S3, the cutting matrix is prepared from perlite, coconut husk, decomposed melaleuca alternifolia slag or perlite, yellow core soil and decomposed melaleuca alternifolia slag according to the mass ratio of 1-2:2:1.
  10. 10. The seedling raising method for promoting root growth of albizia julibrissin cutting seedlings according to claim 1, wherein in the step S4, the post-cutting management method is as follows: (1) Temperature control, namely keeping the temperature of the cutting greenhouse at 23-28 ℃, and timely uncovering the film for ventilation and cooling when the temperature in the greenhouse is higher than 30 ℃; (2) Moisture management, namely checking the moisture of the cutting matrix every 3-4 days, and ventilating to promote the moisture evaporation of the cutting matrix when the moisture is dry and the moisture is wet; (3) And (3) rooting period management, namely generating a relatively stable root system 28-35 days after cutting, gradually improving the light transmittance to 60-70%, spraying 1 time of diluted 800-1000 times of potassium dihydrogen phosphate solution every 10-15 days, supplementing nutrition, and promoting the strong growth of the root system.

Description

Seedling raising method for promoting root growth of albizia julibrissin cutting seedlings Technical Field The invention relates to the technical field of planting of albizia julibrissin, in particular to a seedling raising method for promoting root growth of albizia julibrissin cutting seedlings. Background The dry heat valley refers to high temperature and low humidity valley regions, and is mostly distributed in mountain canyons in tropical or subtropical regions, and the altitude is below 1500-2000 m. Under the interference of long-term human activities, the vegetation coverage rate of the area is low, the hydro-thermal contradiction is prominent, drought and waterlogging disasters are serious, water and soil loss is serious, the topography is broken, and the soil is degenerated. Most of the soil is dry red soil which is not resistant to evaporation and water retention. Because of the harsher environment of the dry-heat valley area, fewer plants suitable for growing in the dry-heat valley area, the acacia of the acacia genus of the leguminosae can grow normally in the dry-heat valley area, and can be used as pioneer tree species for vegetation recovery in the dry-heat valley area. However, the research on cultivating healthy and pest-free albizia julibrissin seedlings is less at present, so that the rapid cultivation of healthy and healthy albizia julibrissin seedlings without pest and disease damage is very critical. The patent number CN202010880528.8 discloses a high-value tree species acacia senegal tissue culture rapid propagation method, and in particular discloses excellent plant selection, explant selection and treatment, primary induction, secondary proliferation culture, rooting culture and seedling hardening and transplanting to obtain strong and pest-free seedlings. Although the method can obtain the robust albizia julibrissin seedlings, the asexual propagation is complicated and high in cost, the seedlings can be obtained through tissue culture processes such as induction, proliferation and rooting, and the whole culture period is long. Patent number CN202410434641.1 discloses a method for rooting outside a bottle of a tissue culture seedling of albizia julibrissin, in particular discloses an explant material disinfection treatment, tissue culture seedling proliferation, tissue culture seedling bottle external cutting and management after cutting to obtain the albizia julibrissin seedling, but the method still needs to carry out tissue culture to obtain the tissue culture seedling, then uses the tissue culture seedling for cutting, the process is complicated, and the albizia julibrissin seedling which is cut by using the method can grow a stable root system after 50-60 days, so that the time required by the whole seedling raising period is too long. Disclosure of Invention The invention aims to provide a seedling raising method for promoting root growth of albizia julibrissin cutting seedlings, which aims to omit the tissue culture process of albizia julibrissin, shorten the seedling raising period of albizia julibrissin, promote rapid generation of the bifurcation number and the intersection number of the root of albizia julibrissin and shorten the time for cutting branches to grow stable root systems. In order to achieve the above purpose, the invention provides a seedling raising method for promoting root growth of cutting seedlings of albizia julibrissin, comprising the following steps: S1, pretreatment of cutting branches, namely taking branches of a albizia julibrissin excellent plant, cutting all leaves on the branches, and reserving a plurality of knots as cutting branches; s2, inducing rooting treatment, namely cutting a cutting opening of the cutting branch, quickly immersing the cutting opening in an antioxidant solution for shaking for 5-10min, and immersing the cutting opening of the cutting branch in a rooting inducer for 0.5-2h, wherein the rooting inducer comprises 150-300mg/L ABT; S3, cutting and planting, namely inserting the cutting branches in the step S2 into the prepared cutting matrix, wherein the cutting depth is 3-5cm, and lightly pressing the matrix to enable the cutting branches to be tightly attached to the matrix; s4, managing after cutting. In the research process, the inventor finds that the reason that the albizia julibrissin branches grow into stable root systems after being treated by ABT, IBA or GGR is probably that the albizia julibrissin branches are rich in rooting inhibiting substances such as tannins, gallic acid compounds, flavonoids, phenolic acid compounds and the like. When the acacia cutting shoots are cut, these materials flow out of the cutting cuts and are oxidized to form an isolation layer, which hinders callus formation and root primordium differentiation, resulting in longer times for the acacia cutting shoots to form stable root systems. In order to solve the technical problems, the treatment method of the technical scheme is to rapidly pu