A sectional cutting seedling raising method
By using a segmented cutting propagation method and treating the root primordia-promoting solution and mixed bacterial solution with IBA, NAA and hymexazol, the problems of high rot rate and long rooting time in summer softwood cuttings were solved, achieving the effect of low rot rate and high rooting rate.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- WEIFANG ACADEMY OF AGRICULTURAL SCIENCES ( WEIFANG BRANCH OF SHANDONG ACADEMY OF AGRICULTURAL SCIENCES )
- Filing Date
- 2026-05-09
- Publication Date
- 2026-07-03
Smart Images
Figure CN122139571B_ABST
Abstract
Description
Technical Field
[0001] This invention relates to a method for propagating seedlings by cuttings, specifically a segmented cutting propagation method, which is suitable for woody ornamental seedlings such as lilac and rose, and belongs to the field of garden plant propagation technology. Background Technology
[0002] Softwood cuttings are a common method of propagation. After accumulating nutrients in spring, many branches are semi-lignified in summer, making it an ideal time for softwood cuttings. Therefore, many plants choose to have softwood cuttings taken in summer. However, high summer temperatures often lead to bacterial growth in greenhouses, causing cuttings to rot, especially before root formation. This is particularly true for varieties that take a long time to root. Therefore, reducing the rot rate of cuttings and shortening the rooting time is a pressing issue that needs to be addressed. Summary of the Invention
[0003] To address the aforementioned problems, this invention provides a segmented cutting propagation method. Applying this method to summer softwood cutting propagation can shorten rooting time and reduce rot rate.
[0004] To solve the above technical problems, the technical solution adopted by the present invention is as follows:
[0005] A segmented cutting propagation method includes the following steps: cutting preparation, root primordia-promoting treatment, and root-promoting treatment;
[0006] The preparation of cuttings involves cutting semi-lignified branches into cuttings.
[0007] Preferably, in the preparation of the cuttings, when cutting semi-lignified branches into cuttings, 2-3 leaves are retained, the upper cut is made horizontally, and a wedge shape is cut downwards 0.9-1.1cm from the lower cut. The epidermis of the cutting is cut from 2.8-3.2cm above the wedge to the wedge cut, reaching the xylem.
[0008] Preferably, in the preparation of the cuttings, the length of the cuttings is 9-11 cm;
[0009] The root primordia-promoting treatment involves quickly dipping the lower part of the cutting into the root primordia-promoting solution, placing the cutting on the partition of the root primordia-promoting device, and spraying the cutting on the partition with aerosol for 9-11 minutes every 2 hours until root primordia are generated, thus obtaining the cutting after root primordia-promoting treatment.
[0010] Preferably, in the root primordium-promoting treatment, the quick-dip time is 19-21 seconds;
[0011] Preferably, in the root primordia-promoting treatment, when the cuttings are placed on the partition of the root primordia-promoting device, the leaves of the cuttings do not overlap, and the distance between each cutting is 7-9 cm;
[0012] The root primordia-promoting solution is an aqueous solution of IBA, NAA, and 70% hymexazol wettable powder, wherein the mass ratio of IBA, NAA, and 70% hymexazol wettable powder is 14.8-15.2:4.8-5.2:0.9-1.1, and the total concentration of IBA, NAA, and 70% hymexazol wettable powder is 0.68-0.72 g / L.
[0013] Preferably, in the root primordia-promoting treatment, the root primordia-promoting solution further contains agricultural organosilicon, and the concentration of agricultural organosilicon is 0.9-1.1 mL / L;
[0014] Preferably, in the root primordia-promoting treatment, the root primordia-promoting device consists of a plastic tube, an aerosol generator, a timer, a plastic cover, a partition, and a plastic box. The plastic cover is a square transparent plastic cover with an open bottom, sealed sides, and a circular hole at the top for connecting the plastic tube. The aerosol generator is connected to the plastic tube, and the timer is connected to the aerosol generator. The plastic box is a square opaque plastic box with sealed sides and bottom, and an open top. A partition is placed between the plastic cover and the plastic box. The partition has a groove with a hole at the bottom of the groove, and air circulation gaps are provided between the partition and the plastic cover, and between the partition and the plastic box.
[0015] The root-promoting treatment uses river sand as the cutting substrate. Before cutting, the cutting bed is disinfected with mixed bacterial solution to saturate the cutting substrate. Holes are made in the cutting bed, and the root primordia-promoting cuttings are placed wedge-down into the holes. Water is sprayed to cultivate roots. Mixed bacterial solution is sprayed after 5-7 days.
[0016] The mixed bacterial solution is an aqueous solution of a mixed bacterial agent, and the concentration of the mixed bacterial agent in the mixed bacterial solution is 7.8-8.2 g / L;
[0017] The mixed microbial agent is composed of Trichoderma harzianum inoculum and Bacillus subtilis inoculum at a mass ratio of 0.9-1.1:0.9-1.1. The Trichoderma harzianum inoculum contains a viable count of greater than or equal to 1 billion / g, and the Bacillus subtilis inoculum contains a viable count of greater than or equal to 20 billion / g.
[0018] Preferably, in the root-promoting treatment, the mixed bacterial solution further contains agricultural organosilicon, and the concentration of agricultural organosilicon is 4.8-5.2 mL / L;
[0019] Preferably, in the root-promoting treatment, when drilling holes in the propagation bed, the drilling depth is 3.5-6 cm;
[0020] Preferably, in the root-promoting treatment, when the root primordia-treated cutting is placed into the hole with the wedge facing downwards, the cutting leaves maintain the same orientation.
[0021] Preferably, in the root-promoting treatment, when spraying water, the water is sprayed until the cuttings are in close contact with the river sand;
[0022] Preferably, in the root-promoting treatment, the cutting shed is sealed during root cultivation to maintain an air humidity of over 95% and a substrate moisture content of 30-50%.
[0023] Compared with the prior art, the beneficial effects of the present invention are as follows:
[0024] (1) Before cutting the cuttings, the epidermis at the base of the cuttings is cut, which will stimulate the production of callus tissue at the cut site, which is conducive to the formation of roots in that part;
[0025] (2) Conventional cutting propagation usually involves dipping the root primordia-promoting solution into the substrate. However, once inserted into the substrate, it is difficult to continuously apply the solution to the cuttings. This invention uses an atomized form to spray the root primordia-promoting solution onto the cuttings, ensuring that it continuously applies the solution to the cuttings during the root primordia formation process, thus promoting the formation of root primordia. When spraying, the cuttings are placed in a box, allowing direct observation of the rooting status through the lid. Rotten cuttings can be removed promptly, and the spraying can be adjusted appropriately according to the condition of the cuttings. The cuttings do not come into contact with the substrate before rooting, thus avoiding rot caused by substrate problems and reducing cross-infection caused by rotten cuttings in the substrate, thereby reducing the rot rate and alleviating the early management work.
[0026] (3) This invention adopts segmented cutting propagation. In the early stage, root primordia-promoting solution is used to stimulate the formation of root primordia while reducing the rot rate. In the later stage, mixed bacterial solution is used to promote root growth, inhibit the growth of harmful bacteria, and improve the resistance of cuttings. The commonly used hormones in softwood cutting propagation are IBA and NAA, and the commonly used fungicide is hymexazol. According to the previous test, the rooting effect of IBA and NAA mixed together is better than that of using them alone. Hymexazol is a pesticide fungicide with low toxicity. Trichoderma harzianum and Bacillus subtilis in the mixed bacterial solution are both microbial agents. While promoting plant growth, they also have the effect of improving the soil. Moreover, the combined use can enhance the effect. It is green and pollution-free and will not cause phytotoxicity.
[0027] (4) When the segmented cutting propagation method of the present invention is applied to the summer propagation of 'Zhongke No. 2' rose tender cuttings, the rot rate is 0.67-1.33%, the rooting rate is 75.33-80.67%, and the callus formation time is 4.67-5.33 days; when the segmented cutting propagation method of the present invention is applied to the summer propagation of 'Cilan' lilac tender cuttings, the rot rate is 2.00-2.67%, the rooting rate is 85.33-87.33%, and the callus formation time is 6.67-7.33 days. Attached Figure Description
[0028] Figure 1 This is a schematic diagram of the root primordium-promoting device.
[0029] Figure 2 This is a schematic diagram of the partition structure;
[0030] The components include: 1. Plastic tube; 2. Aerosol generator; 3. Timer; 4. Plastic cover; 5. Divider; 6. Plastic box. Detailed Implementation
[0031] To provide a clearer understanding of the technical features, objectives, and effects of this invention, specific embodiments of the invention will be described first.
[0032] like Figure 1 and Figure 2 As shown, the root primordia-promoting devices in Examples 1-4 and Comparative Examples 1-4 consist of a plastic tube, an aerosol generator, a timer, a plastic cover, a partition, and a plastic box.
[0033] The plastic cap is a square, transparent plastic cap with an open bottom and sealed sides. The top has a round hole for connecting a plastic tube, which connects to the aerosol generator. The aerosol generator is then connected to a timer.
[0034] The plastic box is a square, opaque plastic box, sealed on all sides and bottom, with an open top. A partition is placed between the plastic lid and the plastic box.
[0035] The partition has a groove with holes at the bottom, and there are air gaps between the partition and the plastic cover, and between the partition and the plastic box.
[0036] This invention provides a segmented cutting propagation method, comprising the following steps: cutting preparation, root primordia-promoting treatment, and root-promoting treatment;
[0037] The preparation of cuttings involves cutting semi-lignified branches into cuttings.
[0038] In the preparation of the cuttings, when cutting semi-lignified branches into cuttings, retain 2-3 leaves, make a horizontal cut at the top, and cut downwards into a wedge shape 0.9-1.1cm from the bottom cut. Cut the bark of the cutting from 2.8-3.2cm above the wedge to the wedge cut, reaching the xylem.
[0039] The length of the cutting is 9-11 cm;
[0040] The root primordia-promoting treatment involves quickly dipping the lower part of the cutting into the root primordia-promoting solution, placing the cutting on the partition of the root primordia-promoting device, and spraying the cutting on the partition with aerosol for 9-11 minutes every 2 hours until root primordia are generated, thus obtaining the cutting after root primordia-promoting treatment.
[0041] In the root primordium-promoting treatment, the quick-dip time is 19-21 seconds;
[0042] When placing the cuttings on the partition of the root primordia-promoting device, the leaves of the cuttings should not overlap, and the distance between each cutting should be 7-9 cm;
[0043] The root primordia-promoting solution is an aqueous solution of IBA, NAA, and 70% hymexazol wettable powder, wherein the mass ratio of IBA, NAA, and 70% hymexazol wettable powder is 14.8-15.2:4.8-5.2:0.9-1.1, and the total concentration of IBA, NAA, and 70% hymexazol wettable powder is 0.68-0.72 g / L.
[0044] The root primordia-promoting solution also contains agricultural organosilicon, with a concentration of 0.9-1.1 mL / L;
[0045] The root-promoting treatment uses river sand as the cutting substrate. Before cutting, the cutting bed is disinfected with mixed bacterial solution to saturate the cutting substrate. Holes are made in the cutting bed, and the root primordia-promoting cuttings are placed wedge-down into the holes. Water is sprayed to cultivate roots. Mixed bacterial solution is sprayed after 5-7 days.
[0046] The mixed bacterial solution is an aqueous solution of a mixed bacterial agent, and the concentration of the mixed bacterial agent in the mixed bacterial solution is 7.8-8.2 g / L;
[0047] The mixed microbial agent is composed of Trichoderma harzianum inoculum and Bacillus subtilis inoculum at a mass ratio of 0.9-1.1:0.9-1.1. The Trichoderma harzianum inoculum contains a viable count of greater than or equal to 1 billion / g, and the Bacillus subtilis inoculum contains a viable count of greater than or equal to 20 billion / g.
[0048] The mixed bacterial solution also contains agricultural organosilicon, with a concentration of 4.8-5.2 mL / L;
[0049] When drilling holes in the insertion bed, the drilling depth should be 3.5-6cm;
[0050] When placing the root primordia-treated cuttings with the wedge facing down into the hole, the cutting leaves should be oriented in the same direction.
[0051] When spraying water, spray until the cuttings are in close contact with the river sand;
[0052] When cultivating roots, seal the cutting shed to maintain an air humidity of over 95% and a substrate moisture content of 30-50%.
[0053] Example 1
[0054] A segmented cutting propagation method, specifically:
[0055] S1. Cutting preparation
[0056] On May 30th, healthy, disease-free, and pest-free semi-lignified branches of the current year's growth of 'Zhongke No. 2' rose were collected. The branches were 0.5cm in diameter and cut into 10cm long cuttings, retaining 2 leaves. The upper cut was made horizontally, and a wedge shape was cut downwards 1cm from the lower cut. From 3cm above the wedge to the wedge cut, the bark of the cutting was cut with a knife to the depth of the xylem.
[0057] S2, Root Primordial Promotion Treatment
[0058] Immerse the lower part of the cuttings in the root primordia-promoting solution (the root primordia-promoting solution is prepared by mixing IBA, NAA, and 70% hymexazol wettable powder in water at a mass ratio of 15:5:1, with a total concentration of 0.7 g / L). After a quick dip of 20 seconds, remove the cuttings and place them on the partition 5 of the root primordia-promoting device. When placing the cuttings, do not overlap the leaves. The distance between each cutting should be 8 cm. Use the aerosol generator 2 to atomize the root primordia-promoting solution and then spray it onto the cuttings on the partition 5 through the plastic tube 1. Set the timer 3 to spray for 10 minutes every 2 hours and continue spraying until root primordia are generated. Then immediately proceed with S3, the root-promoting treatment.
[0059] S3, Root-promoting treatment
[0060] River sand was used as the cutting substrate. Before cutting, the cutting bed was disinfected with a mixed bacterial solution (the mixed bacterial solution is an aqueous solution of a mixed bacterial agent with a concentration of 8 g / L, which is a mixture of Trichoderma harzianum and Bacillus subtilis in a mass ratio of 1:1, with Trichoderma harzianum having a viable count of 1 billion / g and Bacillus subtilis having a viable count of 20 billion / g) to saturate the cutting substrate in the cutting bed.
[0061] On June 4th, holes were drilled in the propagation bed at a spacing of 8×8cm, with a depth of 6cm. The cuttings, treated with root primordia to promote root growth, were then placed wedge-down into the holes, ensuring the leaves were aligned. Immediately after planting, water was sprayed to ensure close contact between the cuttings and the river sand. The propagation shed was then sealed to maintain an air humidity of over 95% and a substrate moisture content of 30-50%. On June 10th, a mixed bacterial solution was sprayed once at a rate of 1L / m². 2 The rooting status will be tallied starting June 20th.
[0062] Example 2
[0063] This embodiment provides a segmented cutting propagation method, the steps of which are basically the same as in Embodiment 1, except that:
[0064] In the preparation of S1 cuttings, 'Ceramic Blue' clove was used instead.
[0065] Example 3
[0066] A segmented cutting propagation method, specifically:
[0067] S1. Cutting preparation
[0068] On May 30th, healthy, disease-free, and pest-free semi-lignified branches of the current year's growth of 'Zhongke No. 2' rose were collected. The branches were 0.5cm in diameter and cut into 10cm long cuttings, retaining 2 leaves. The upper cut was made horizontally, and a wedge shape was cut downwards 1cm from the lower cut. From 3cm above the wedge to the wedge cut, the bark of the cutting was cut with a knife to the depth of the xylem.
[0069] S2, Root Primordial Promotion Treatment
[0070] Immerse the lower part of the cuttings in the root primordia-promoting solution (the root primordia-promoting solution is prepared by mixing IBA, NAA, 70% hymexazol wettable powder, and agricultural organosilicon in water. The mass ratio of IBA, NAA, and 70% hymexazol wettable powder in the root primordia-promoting solution is 15:5:1, the total concentration of IBA, NAA, and 70% hymexazol wettable powder is 0.7 g / L, and the concentration of agricultural organosilicon is 1 mL / L). After a quick dip of 20 seconds, remove the cuttings and place them on the partition 5 of the root primordia-promoting device. When placing the cuttings, do not overlap the leaves. The distance between each cutting should be 8 cm. After atomizing the root primordia-promoting solution with the aerosolizer 2, spray the cuttings on the partition 5 through the plastic tube 1. Set the timer 3 to spray for 10 minutes every 2 hours and spray continuously until root primordia are generated. Then immediately carry out S3 root-promoting treatment.
[0071] S3, Root-promoting treatment
[0072] River sand was used as the cutting substrate. Before cutting, the cutting bed was disinfected with a mixed bacterial solution (the mixed bacterial solution is an aqueous solution of mixed bacterial agent and agricultural organosilicon, with a concentration of 8 g / L for the mixed bacterial agent and 5 mL / L for the agricultural organosilicon; the mixed bacterial agent is a mixture of Trichoderma harzianum inoculant and Bacillus subtilis inoculant at a mass ratio of 1:1, with a viable count of 1 billion / g for Trichoderma harzianum inoculant and 20 billion / g for Bacillus subtilis inoculant) to saturate the cutting substrate in the cutting bed.
[0073] On June 4th, holes were drilled in the propagation bed at a spacing of 8×8cm, with a depth of 6cm. The cuttings, treated with root primordia to promote root growth, were then placed wedge-down into the holes, ensuring the leaves were aligned. Immediately after planting, water was sprayed to ensure close contact between the cuttings and the river sand. The propagation shed was then sealed to maintain an air humidity of over 95% and a substrate moisture content of 30-50%. On June 10th, a mixed bacterial solution was sprayed once at a rate of 1L / m². 2 The rooting status will be tallied starting June 20th.
[0074] Example 4
[0075] This embodiment provides a segmented cutting propagation method, the steps of which are basically the same as those in Embodiment 3, except that:
[0076] In the preparation of S1 cuttings, 'Ceramic Blue' clove was used instead.
[0077] Comparative Example 1
[0078] This comparative example provides a segmented cutting propagation method, the steps of which are basically the same as those in Example 1, except that:
[0079] 1. In the S2 root primordium facilitation treatment, the gas atomization treatment is omitted. Specifically, the S2 root primordium facilitation treatment is changed to:
[0080] S2, Root Primordial Promotion Treatment
[0081] Immerse the lower part of the cuttings in the root primordia-promoting solution (the root primordia-promoting solution is prepared by mixing IBA, NAA, and 70% hymexazol wettable powder in water at a mass ratio of 15:5:1, with a total concentration of 0.7 g / L for the three components). After a quick dip of 20 seconds, remove the cuttings and immediately proceed with S3 root-promoting treatment.
[0082] 2. In the S3 root-promoting treatment, replace the mixed bacterial solution with a 1000-fold dilution of 70% hymexazol wettable powder. Specifically, the S3 root-promoting treatment should be changed to:
[0083] S3, Root-promoting treatment
[0084] River sand was used as the cutting substrate. Before cutting, the cutting bed was disinfected with a 1000-fold dilution of 70% hymexazol wettable powder to saturate the cutting substrate.
[0085] On June 4th, holes were drilled in the propagation bed at a spacing of 8×8cm, with a hole depth of 6cm. The cuttings, after root primordia-promoting treatment, were then placed wedge-down into the holes, ensuring the leaves were aligned. Immediately after planting, water was sprayed to ensure close contact between the cuttings and the river sand. The propagation shed was then sealed to maintain an air humidity of over 95% and a substrate moisture content of 30-50%. On June 10th, a 1000-fold dilution of 70% hymexazol wettable powder was sprayed once, at a rate of 1L / m². 2 The rooting status will be tallied starting June 20th.
[0086] Comparative Example 2
[0087] This comparative example provides a segmented cutting propagation method, the steps of which are basically the same as those in Example 1, except that:
[0088] In the S2 root primordium facilitation treatment, the gas atomization process is omitted. Specifically, the S2 root primordium facilitation treatment is changed to:
[0089] S2, Root Primordial Promotion Treatment
[0090] Immerse the lower part of the cuttings in the root primordia-promoting solution (the root primordia-promoting solution is prepared by mixing IBA, NAA, and 70% hymexazol wettable powder in water at a mass ratio of 15:5:1, with a total concentration of 0.7 g / L for the three components). After a quick dip of 20 seconds, remove the cuttings and immediately proceed with S3 root-promoting treatment.
[0091] Comparative Example 3
[0092] This comparative example provides a segmented cutting propagation method, the steps of which are basically the same as those in Example 1, except that:
[0093] In the S3 root-promoting treatment, a 1000-fold dilution of 70% hymexazol wettable powder was used instead of the mixed bacterial solution. Specifically, the S3 root-promoting treatment was changed to:
[0094] S3, Root-promoting treatment
[0095] River sand was used as the cutting substrate. Before cutting, the cutting bed was disinfected with a 1000-fold dilution of 70% hymexazol wettable powder to saturate the cutting substrate.
[0096] On June 4th, holes were drilled in the propagation bed at a spacing of 8×8cm, with a hole depth of 6cm. The cuttings, after root primordia-promoting treatment, were then placed wedge-down into the holes, ensuring the leaves were aligned. Immediately after planting, water was sprayed to ensure close contact between the cuttings and the river sand. The propagation shed was then sealed to maintain an air humidity of over 95% and a substrate moisture content of 30-50%. On June 10th, a 1000-fold dilution of 70% hymexazol wettable powder was sprayed once, at a rate of 1L / m². 2 The rooting status will be tallied starting June 20th.
[0097] Results Statistics
[0098] The segmented cutting propagation method was carried out according to Examples 1-4 and Comparative Examples 1-4. 50 cuttings were taken for each propagation, and the process was repeated three times. The average rot rate, average rooting rate, average callus formation time, and rooting time of the three replicates were statistically analyzed. The results are as follows:
[0099]
[0100] Comparing Examples 1, 3, 1, 2, and 3 in the table above, it was found that (Examples 2 and 4 were planted with 'Porcelain Blue' lilac, which are different plant species and therefore cannot be compared), Example 3 yielded the best results, followed by Example 1. This demonstrates that using a root primordia-promoting solution containing IBA, NAA, and hymexazol for quick dipping and spraying, and using a mixed bacterial solution of Trichoderma harzianum and Bacillus subtilis for root promotion in a segmented cutting propagation method can reduce the rot rate, increase the rooting rate, and shorten the callus formation time. Furthermore, adding a specific concentration of agricultural organosilicon to the root primordia-promoting solution and the mixed bacterial solution can improve the cutting propagation effect.
Claims
1. A method of propagating cuttings in segments, characterized in that, Includes the following steps: Cutting preparation, root primordium-promoting treatment, and root-promoting treatment; The preparation of cuttings involves cutting semi-lignified branches into cuttings. The root primordia-promoting treatment involves quickly dipping the lower part of the cutting into the root primordia-promoting solution, placing the cutting on the partition (5) of the root primordia-promoting device, and spraying the root primordia-promoting solution onto the cutting on the partition (5) in the form of aerosol spraying for 9-11 minutes every 2 hours until root primordia are generated, thus obtaining the cutting after root primordia-promoting treatment. In the root primordia-promoting treatment, the root primordia-promoting device consists of a plastic tube (1), an aerosol generator (2), a timer (3), a plastic cover (4), a partition (5), and a plastic box (6); The plastic cap (4) is a square transparent plastic cap. The bottom of the plastic cap (4) is open and the four sides are sealed. The top has a round hole for connecting the plastic tube (1). The aerosol device (2) is connected through the plastic tube (1). The aerosol device (2) is connected to the timer (3). The plastic box (6) is a square opaque plastic box, sealed on all sides and bottom, and open on top. A partition (5) is placed between the plastic lid (4) and the plastic box (6). The partition (5) has a groove and a hole at the bottom of the groove. There are air flow gaps between the partition (5) and the plastic cover (4) and between the partition (5) and the plastic box (6). The root primordia-promoting solution is an aqueous solution of IBA, NAA, and 70% hymexazol wettable powder; The root-promoting treatment uses river sand as the cutting substrate. Before cutting, the cutting bed is disinfected with mixed bacterial solution to saturate the cutting substrate. Holes are made in the cutting bed, and the root primordia-promoting cuttings are placed wedge-down into the holes. Water is sprayed to cultivate roots. Mixed bacterial solution is sprayed after 5-7 days. The mixed bacterial solution is an aqueous solution of a mixed bacterial agent, which is a mixture of Trichoderma harzianum and Bacillus subtilis bacterial agents.
2. The segmented cuttings method according to claim 1, wherein, In the preparation of the cuttings, when cutting semi-lignified branches into cuttings, retain 2-3 leaves, make a horizontal cut at the top, and cut downwards into a wedge shape 0.9-1.1cm from the bottom cut. Cut the bark of the cutting from 2.8-3.2cm above the wedge to the wedge cut, reaching the xylem. The length of the cuttings is 9-11 cm.
3. The segmented cuttings method according to claim 1, wherein, In the root primordium-promoting treatment, the quick-dip time is 19-21 seconds; When placing the cuttings on the partition of the root primordia-promoting device, the leaves of the cuttings should not overlap, and the distance between each cutting should be 7-9 cm.
4. The segmented cuttings method according to claim 1, wherein, In the root primordia-promoting treatment, the mass ratio of IBA, NAA, and 70% hymexazol wettable powder in the root primordia-promoting solution is 14.8-15.2:4.8-5.2:0.9-1.1, and the total concentration of IBA, NAA, and 70% hymexazol wettable powder is 0.68-0.72 g / L.
5. The segmented cuttings method according to claim 1, wherein, In the root primordia-promoting treatment, the root primordia-promoting solution also contains agricultural organosilicon, with a concentration of 0.9-1.1 mL / L.
6. The segmented cuttings method according to claim 1, wherein, In the root-promoting treatment, the concentration of the mixed bacterial agent in the mixed bacterial solution is 7.8-8.2 g / L; The mass ratio of Trichoderma harzianum inoculant to Bacillus subtilis inoculant in the mixed inoculant is 0.9-1.1:0.9-1.1; the viable count of Trichoderma harzianum in the Trichoderma harzianum inoculant is greater than or equal to 1 billion / g, and the viable count of Bacillus subtilis in the Bacillus subtilis inoculant is greater than or equal to 20 billion / g.
7. The segmented cuttings method according to claim 1, wherein In the root-promoting treatment, the mixed bacterial solution also contains agricultural organosilicon at a concentration of 4.8-5.2 mL / L.
8. The segmented cuttings method according to claim 1, wherein, In the root-promoting treatment, when drilling holes in the propagation bed, the drilling depth is 3.5-6cm; In the root-promoting treatment, when the root primordia-promoted cutting is placed into the hole with the wedge facing downwards, the cutting leaves should maintain the same orientation. During the root-promoting treatment, water is sprayed until the cuttings are in close contact with the river sand.
9. The segmented cuttings method according to claim 1, wherein, In the root-promoting treatment, the cutting shed is sealed during root cultivation to maintain an air humidity of over 95% and a substrate moisture content of 30-50%.