Method for quickly recovering growth of autumn planted sugarcane after frost
By cleaning the frozen tissues of autumn-planted sugarcane after frost, covering it with film for insulation, breaking the film to protect the seedlings, and applying topdressing, combined with the use of plant growth regulators, the problems of long recovery period and low seedling emergence rate after frost in autumn-planted sugarcane have been solved, achieving rapid recovery and high seedling emergence rate, reducing economic losses and maintaining the high and stable yield characteristics of sugarcane.
Patent Information
- Application Number
- CN202511893025.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-12-16
- Publication Date
- 2026-03-27
AI Technical Summary
Existing technologies result in a long recovery period and low emergence rate for autumn-planted sugarcane after frost damage. In particular, the natural recovery rate is insufficient in cases of moderate to severe frost damage, leading to serious economic losses and affecting the sugarcane growth cycle and yield.
By cleaning and treating frozen tissues, covering with mulch for insulation, breaking the mulch to protect seedlings, and applying topdressing during the recovery period, combined with the use of plant growth regulators, the rapid recovery and growth of autumn-planted sugarcane can be achieved. Specific steps include cutting off frozen tissues, covering with mulch, breaking the mulch to protect seedlings, and spraying foliar fertilizer. The length of healthy stem tissues to be retained and the type of plant growth regulators are adjusted according to the degree of frost damage.
It enables rapid recovery of autumn-planted sugarcane after frost, with a seedling emergence rate of over 90%, shortening the recovery period, reducing economic losses, maintaining growth cycle advantages, and increasing yield.
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Figure CN121730169A_ABST
Abstract
Description
Technical Field
[0001] This invention belongs to the field of sugarcane planting technology, specifically relating to a method for rapidly restoring the growth of autumn-planted sugarcane after frost. Background Technology
[0002] Autumn-planted sugarcane, as an important sugarcane cultivation method, has become an effective way to increase sugarcane yield and achieve double income growth for sugar companies and sugarcane farmers due to its advantages such as long growth cycle, high yield, sufficient sugar accumulation, and less weed damage. It is also a common method for the rapid propagation of traditional improved varieties. However, in actual planting, autumn-planted sugarcane often faces the threat of frost damage, especially in areas with frequent low winter temperatures such as northern and northwestern Guangxi in my country. Frost usually occurs around January each year, posing a serious threat to the growth and development of autumn-planted sugarcane. Among them, the growth status of autumn-planted sugarcane plants suffering from mild, moderate, and severe frost damage is as follows: Mild frost damage (0℃ to -0.9℃): leaves wither and turn yellow, growing point dies, but the stem may survive for 3 months; Moderate frost damage (-0.9℃ to -3℃): stem buds and growing point freeze to death, internal tissues of sugarcane stem turn yellow and sour; Severe frost damage (below -3℃): internal tissues of the entire sugarcane plant freeze to death, the top turns sour, and it can only survive for 2 weeks to 1 month after freezing.
[0003] Currently, the traditional method for dealing with frost damage to autumn-planted sugarcane mainly relies on natural recovery. Under mild frost conditions, the plants can gradually recover, but the recovery period is relatively long, usually requiring 15-20 days, and the emergence rate is only about 70%. For moderate to severe frost damage, the natural recovery ability is significantly reduced, with a natural recovery rate of only 30-60%. Once the emergence rate falls below 30%, sugarcane farmers often have to choose to plow and replant, resulting in a direct cost loss of about 700 yuan per mu (approximately 0.16 acres), seriously affecting the planting efficiency.
[0004] Furthermore, since frosts mostly occur in winter, replanting can only be postponed until late winter or spring, shortening the sugarcane growth cycle and preventing autumn-planted sugarcane from realizing its inherent growth advantages. In practice, the yield of sugarcane forced to be replanted in this way is usually about 10% lower than that of autumn-planted sugarcane, further exacerbating the economic losses for sugarcane farmers. It is evident that traditional methods are significantly inadequate in dealing with moderate to severe frost damage, failing to effectively guarantee the recovery rate of affected sugarcane plants and struggling to maintain the high and stable yield characteristics that autumn-planted sugarcane should possess. Therefore, how to achieve rapid and efficient growth recovery of autumn-planted sugarcane after frost damage, especially severe frost, improve seedling emergence rate and seedling quality, and reduce economic losses for sugarcane farmers has become an urgent technical problem to be solved in sugarcane cultivation. Summary of the Invention
[0005] To address the above problems, this invention provides a method for the rapid recovery of autumn-planted sugarcane after frost. By cleaning and treating the frozen tissue, covering with film for insulation, breaking the film to protect the seedlings, and applying fertilizer during the recovery period, the method achieves rapid recovery of autumn-planted sugarcane after frost. The sugarcane plants can re-emerge in just 2 to 4 days after treatment, with an emergence rate of over 90%, which significantly shortens the recovery period and ensures that the sugarcane seedlings germinate quickly and uniformly.
[0006] This invention is achieved through the following technical solution:
[0007] A method for rapidly restoring the growth of autumn-planted sugarcane after frost includes the following steps:
[0008] (1) Cleaning and treatment of frozen tissue: 2 to 3 days after the frost, cut off the frozen tissue of the above-ground part of the autumn-planted sugarcane plants that have been damaged by frost until the healthy sugarcane stem tissue or intact healthy buds are exposed, and let the cut dry.
[0009] (2) Covering with plastic film for insulation: On the same day that the frozen tissue is cleaned and treated, cover the sugarcane ridge with plastic film. When covering with plastic film, keep the plastic film flat, taut and straight. Then use fine soil to cover and compact the plastic film around the sugarcane stump.
[0010] (3) Breaking the film to protect the seedlings: After covering the film for heat preservation, wait 2 to 4 days until the seedlings of the autumn-planted sugarcane grow again and touch the film. Then, break the film manually in time to guide the seedlings out of the film and avoid burning or damaging the seedlings.
[0011] (4) Topdressing during the recovery period: When the sugarcane seedlings have recovered and emerged uniformly, and have grown 3 to 4 leaves, spray foliar fertilizer.
[0012] Furthermore, in step (1), in order to accelerate and improve the budding efficiency, a plant growth regulator can be sprayed onto the cut of the sugarcane stump. The plant growth regulator is a compound of cyclopropene compounds or brown algae extract and chitosan.
[0013] The plant growth regulator is 1-methylcyclopropene, with an application concentration of 0.5–2.0 μL / L and an application rate of 30–40 L / mu.
[0014] The plant growth regulator is a compound of brown algae extract and chitosan, wherein the content of brown algae extract is 10-20% and the content of chitosan is 1-5%. After compounding, it is diluted 500-1000 times and the application rate is 30-40 L / mu.
[0015] Furthermore, in step (1), when autumn-planted sugarcane suffers mild frost damage, after cutting off the frost-damaged tissue, the length of the exposed healthy sugarcane stalk tissue is 6-8 cm.
[0016] Furthermore, in step (1), when autumn-planted sugarcane suffers moderate frost damage, after cutting off the frost-damaged tissue, the length of the exposed healthy sugarcane stalk tissue is 4-5 cm.
[0017] Furthermore, in step (1), when autumn-planted sugarcane suffers severe frost damage, after cutting off the frozen tissue, the length of the exposed healthy sugarcane stem tissue should be 2-3 cm, and it must be ensured that there is at least one complete healthy bud.
[0018] Further, in step (1), the specific operation of cutting is as follows: use a knife close to the ground, cut into the ground at an angle of 15 to 25 degrees with the blade facing upward, cut off in one stroke, and the cut is smooth and does not tear.
[0019] Furthermore, in step (2), the mulch film is a white mulch film with a width of 50-70cm to ensure complete coverage of the sugarcane stubble.
[0020] Furthermore, in step (2), the thickness of the fine soil covering is 8-10 cm.
[0021] Furthermore, in step (4), the foliar fertilizer is a compound foliar fertilizer containing trace elements; the foliar fertilizer is sprayed 2 to 3 times, with an interval of 5 to 7 days between each application.
[0022] Compared with the prior art, the advantages and beneficial effects of the present invention are as follows:
[0023] 1. This invention rapidly removes necrotic tissue through the cleaning and treatment of frozen tissue, and activates the regeneration and recovery ability of sugarcane stubble by combining it with plant growth regulators. Subsequently, mulching creates a stable temperature and humidity environment for the sugarcane stumps, preventing secondary frost damage and promoting germination. When seedlings emerge, the mulch is promptly removed to protect them from high-temperature scorching, ensuring a smooth transition to natural growth. Finally, topdressing during the recovery period replenishes nutrients, accelerating seedling recovery and enhancing resistance. This invention enables rapid recovery and growth of autumn-planted sugarcane after frost. Sugarcane stubble re-emerges within 2-4 days after treatment, with an emergence rate exceeding 90%, significantly improving upon traditional natural recovery methods (which have a natural recovery rate of only 30-70%). This greatly shortens the recovery cycle and ensures rapid and uniform germination of sugarcane seedlings.
[0024] 2. Compared to traditional methods that often require replanting after moderate to severe frost damage (direct cost of approximately 700 yuan per mu), this invention promotes the in-situ recovery of frozen sugarcane plants, avoiding the need for replanting and the associated costs of seeds, labor, and agricultural inputs, directly saving approximately 700 yuan per mu in economic losses. Furthermore, the recovered autumn-planted sugarcane retains its longer growth cycle, resulting in a yield increase of approximately 10% compared to spring-planted sugarcane, further generating an additional income of approximately 300 yuan per mu.
[0025] 3. This invention applies plant growth regulators to the cut surfaces of sugarcane stubble, effectively promoting wound healing and enhancing stress resistance, thus consolidating recovery capabilities. The 1-methylcyclopropene used effectively blocks ethylene ripening and senescence signals at the cut surface, slowing tissue aging and allowing time for bud sprouting and energy reserves. In another compound formulation, brown algae extract, rich in natural growth regulators and polysaccharides, stimulates cell division and enhances metabolic activity; chitosan possesses excellent film-forming and antibacterial properties, forming a protective layer on the cut surface to reduce water loss and pathogen infection. The combination of these two components provides both growth promotion and protection, synergistically promoting wound healing, activating dormant buds, and enhancing the cold and disease resistance of new seedlings, thus promoting rapid and robust growth of sugarcane seedlings.
[0026] 4. In the process of cleaning frozen tissue, this invention specifies the length of healthy sugarcane stalks to be retained based on the degree of frost damage (6-8cm for mild damage, 4-5cm for moderate damage, and 2-3cm for severe damage), and specifies the cutting angle. While preserving as much healthy tissue as possible, it ensures smooth and intact cuts that promote healing. This is followed by standardized procedures such as mulching for insulation, breaking the film to protect the seedlings, and applying fertilizer during the recovery period. This method is applicable to different levels of frost damage in autumn-planted sugarcane, has strong adaptability and operability, and is easy for sugarcane farmers to master and implement.
[0027] 5. This invention enhances the resilience of autumn-planted sugarcane by efficiently restoring it after frost damage, thus facilitating the stable promotion and application of this high-yield planting model. Furthermore, as autumn-planted sugarcane serves as a crucial pathway for the rapid propagation of superior varieties, the application of this invention's method ensures a timely and sufficient supply of seed tubers, preventing disruption to current year's production and minimizing impact on seed availability and yield in the following year. This plays a positive role in the improvement and sustainable development of the sugarcane industry. Attached Figure Description
[0028] Figure 1 This is a picture of autumn-planted sugarcane after being frost-damaged in Example 1.
[0029] Figure 2 This is a diagram of healthy sugarcane stalk tissue remaining after the frozen tissue was removed from the autumn-planted sugarcane that suffered mild frost damage in Example 1.
[0030] Figure 3 This is a diagram of healthy sugarcane stalk tissue remaining after the frozen tissue was removed from the sugarcane planted in autumn in Example 1, which suffered moderate frost damage.
[0031] Figure 4 This is a diagram of healthy sugarcane stalk tissue remaining after the frozen tissue was removed from the sugarcane planted in autumn in Example 1, which suffered severe frost damage.
[0032] Figure 5 This is a diagram showing the seedlings emerging from the soil and the film being broken to guide them out of the film in Example 1.
[0033] Figure 6This is a diagram showing the growth status of seedlings after membrane rupture in Example 1.
[0034] Figure 7 This is a diagram showing the seedlings recovering and emerging uniformly in Example 1. Detailed Implementation
[0035] The present invention will be further described in detail below through embodiments. These embodiments are only used to illustrate the present invention and do not limit the scope of protection of the present invention.
[0036] Example 1
[0037] From December 21 to 25, 2023, a sugarcane experimental base in northwestern Guangxi suffered continuous frost damage. Approximately 7 mu (about 1.15 acres) of autumn-planted sugarcane (involving multiple varieties and strains such as Guitang 42 and Guiliu 05-136) planted in September of that year suffered moderate to severe frost damage. Figure 1 The 7 mu (approximately 0.8 acres) of damaged sugarcane fields were divided into three areas, A, B, and C, each approximately 2.3 mu (approximately 0.15 acres). The following methods were used to rapidly restore the growth of autumn-planted sugarcane after frost damage:
[0038] (1) Cleaning and treatment of frozen tissue: Two days after the frost, for the frost-damaged autumn-planted sugarcane plants, use a sharp knife close to the ground, with the blade facing upwards at a 20° angle to the ground, to cut off the above-ground part of the frozen sugarcane stalk in one stroke, ensuring the cut is smooth and does not tear the sugarcane stalk tissue, until the healthy sugarcane stalk tissue below is exposed or complete healthy buds are confirmed. Depending on the degree of frost damage suffered by the autumn-planted sugarcane, the length of the healthy sugarcane stalk tissue exposed after cutting off the frozen tissue is as follows: For mild frost damage, retain 6cm ( Figure 2 When suffering moderate frost damage, retain 4cm ( Figure 3 When subjected to severe frost damage, retain 2cm ( Figure 4 ), and ensure that there is at least one complete healthy bud eye, and let the cut dry.
[0039] Area A: After removing the frozen tissue, the wound is dried to complete the treatment.
[0040] Area B: After the cut surfaces are dried, spray the cut surfaces of the sugarcane stumps with a compound of brown algae extract and chitosan, wherein the content of brown algae extract is 15% and the content of chitosan is 2%. After compounding, dilute the solution 1000 times and apply at a rate of 40L / mu.
[0041] Area C: After the cut surfaces have dried, spray the sugarcane stubble cut surfaces with the plant growth regulator 1-methylcyclopropene at a concentration of 1.5 μL / L and an application rate of 40 L / mu.
[0042] (2) Covering with film for heat preservation: On the same day that the frozen tissue is cleaned and treated, cover the sugarcane ridge with a white film with a width of 60cm. When covering the film, keep the film flat, taut and straight. Then use fine soil to cover and compact the film around the sugarcane stump, with a covering thickness of 10cm.
[0043] (3) Breaking the film to protect the seedlings: After covering the film for heat preservation, when the seedlings of the autumn-planted sugarcane have grown again and touched the film in about 3 days, break the film manually in time. Make a small hole in the film directly above the seedlings and carefully guide the seedlings to emerge from the film. Figure 5 , Figure 6 This helps prevent seedling burn or damage caused by the high temperature and humidity environment inside the film.
[0044] (4) Topdressing during the recovery period: After the sugarcane seedlings have recovered and emerged uniformly ( Figure 7 When the sugarcane has grown 3 leaves, spray it with a compound foliar fertilizer containing micronutrients twice, with an interval of 5 days between each application, to promote the rapid recovery and growth of the sugarcane seedlings and enhance their resistance.
[0045] After treatment using the method described in this embodiment, seedling emergence was observed starting 2-3 days later. The seedling emergence rate was tallied and observed again after 7 days, and the seedling emergence data was recorded in Table 1 below.
[0046] Table 1. Effects of different treatments on seedling emergence of frost-damaged autumn-planted sugarcane.
[0047]
[0048] As shown in Table 1, the frozen autumn-planted sugarcane in zones A, B, and C all recovered rapidly. In zone A, the frozen sugarcane began to sprout new shoots 3-4 days after being covered with plastic film for insulation, with a sprouting rate of 90.25% after 7 days, indicating relatively uniform sprouting. In zone B, the frozen sugarcane began to sprout new shoots 2-3 days after being covered with plastic film for insulation, with even faster sprouting time; the sprouting rate reached 96.33% after 7 days, also indicating uniform sprouting. In zone C, the frozen sugarcane began to sprout new shoots 3-4 days after being covered with plastic film for insulation, with a sprouting rate of 94.65% after 7 days, also indicating uniform sprouting.
[0049] The main reason for the differences in emergence effects among the three treatment zones in Table 1 is that the brown algae extract and chitosan compound used in Zone B have both growth-promoting and protective functions. It can stimulate cell division and enhance metabolic activity, while also forming a protective film to reduce water loss and pathogen infection, resulting in the fastest emergence, highest emergence rate, and uniform emergence of the frozen autumn-planted sugarcane. The 1-methylcyclopropene used in Zone C mainly delays tissue senescence by inhibiting ethylene, thus buying time for the buds of the frozen autumn-planted sugarcane to germinate, resulting in a better emergence rate and uniformity, but the bud-promoting speed is slightly slower than in Zone B. Zone A only underwent mulching treatment after cutting off the frozen tissue and drying the wounds, lacking the bioactivation and protective effects of plant regulators, resulting in a slightly longer emergence time and relatively lower emergence rate and uniformity.
[0050] Example 2
[0051] A method for rapidly restoring the growth of autumn-planted sugarcane after frost includes the following steps:
[0052] (1) Cleaning and treatment of frozen tissue: Three days after the frost, for the frost-damaged autumn-planted sugarcane plants, use a sharp knife close to the ground, with the blade facing upwards at a 25° angle to the ground, to cut off the frozen sugarcane stalk above ground in one stroke, ensuring the cut is smooth and does not tear the sugarcane stalk tissue, until the healthy sugarcane stalk tissue below is exposed or a complete healthy bud is confirmed. Depending on the degree of frost damage suffered by the autumn-planted sugarcane, the length of the exposed healthy sugarcane stalk tissue after cutting off the frozen tissue is as follows: 7cm for mild frost damage; 5cm for moderate frost damage; 2cm for severe frost damage, and ensure that there is at least one complete healthy bud; after drying the cut, spray the sugarcane stalk cut with a plant growth regulator, which is a compound of brown algae extract and chitosan, with the content of brown algae extract being 20% and the content of chitosan being 1%. After compounding, dilute 500 times and apply at a rate of 30L / mu.
[0053] (2) Covering with film for heat preservation: On the same day that the frozen tissue is cleaned and treated, cover the sugarcane ridge with a white film with a width of 50cm. When covering the film, keep the film flat, taut and straight. Then use fine soil to cover and compact the film around the sugarcane stump, with a covering thickness of 10cm.
[0054] (3. Breaking the film to protect the seedlings: After covering the film for heat preservation, wait 2 days until the seedlings of the autumn-planted sugarcane grow again and touch the film. Then, break the film manually in time. Make a small hole in the film directly above the seedling and carefully guide the seedling to be exposed outside the film to avoid burning or damaging the seedlings due to the high temperature and humidity environment inside the film.
[0055] (4) Topdressing during the recovery period: When the sugarcane seedlings have recovered and emerged uniformly and have grown 3 leaves, spray a compound foliar fertilizer containing micronutrients twice, with an interval of 7 days between each spraying, to promote the rapid recovery and growth of the sugarcane seedlings and enhance their resistance.
[0056] After treatment using the method described in this embodiment, the frozen autumn-planted sugarcane recovered rapidly and sprouted quickly. Healthy tissues re-germinated and sprouted in just 2 days after treatment, and the sprouting rate reached 94% in 7 days.
[0057] Example 3
[0058] A method for rapidly restoring the growth of autumn-planted sugarcane after frost includes the following steps:
[0059] (1) Cleaning and treatment of frozen tissue: Two days after the frost, for the frost-damaged autumn-planted sugarcane plants, use a sharp knife close to the ground, with the blade facing upwards at a 20° angle to the ground, to cut off the frozen sugarcane stalk above ground in one stroke, ensuring that the cut is smooth and does not tear the sugarcane stalk tissue, until the healthy sugarcane stalk tissue below is exposed or a complete healthy bud is confirmed. Depending on the degree of frost damage suffered by the autumn-planted sugarcane, the length of the healthy sugarcane stalk tissue exposed after cutting off the frozen tissue is as follows: 6 cm for mild frost damage; 4 cm for moderate frost damage; and 2 cm for severe frost damage, ensuring that there is at least one complete healthy bud. After the cut is dried, spray the sugarcane stalk cut with the plant growth regulator 1-methylcyclopropene at a concentration of 1.5 μL / L and an application rate of 40 L / mu.
[0060] (2) Covering with film for heat preservation: On the same day that the frozen tissue is cleaned and treated, cover the sugarcane ridge with a white film with a width of 70cm. When covering the film, keep the film flat, taut and straight. Then use fine soil to cover and compact the film around the sugarcane stump, with a covering thickness of 8cm.
[0061] (3. Breaking the film to protect the seedlings: After covering the film for heat preservation, wait 3 days until the seedlings of the autumn-planted sugarcane re-emerge and touch the film. Then, break the film manually in time. Make a small hole in the film directly above the seedlings and carefully guide the seedlings out of the film to avoid burning or damaging the seedlings due to the high temperature and humidity environment inside the film.
[0062] (4) Topdressing during the recovery period: When the sugarcane seedlings have recovered and emerged uniformly and have grown 4 leaves, spray a compound foliar fertilizer containing micronutrients. Spray 3 times consecutively, with an interval of 5 days between each application, to promote the rapid recovery and growth of the sugarcane seedlings and enhance their resistance.
[0063] After treatment using the method described in this embodiment, the frozen autumn-planted sugarcane recovered rapidly and sprouted quickly. Healthy tissues re-germinated and sprouted in just 3 days after treatment, and the sprouting rate reached 93% in 7 days.
[0064] Comparative Example 1
[0065] Comparative Example 1 employed a traditional natural recovery method, where autumn-planted sugarcane was subjected to no artificial intervention after frost damage. No frozen tissue was removed, no plant growth regulators were used, no mulching for insulation was applied, and no special fertilization was administered; the recovery relied solely on the sugarcane's own physiological recovery capabilities. Results showed that the natural emergence time of frost-damaged plants was delayed by 15–20 days, and the emergence rate was low. The emergence rate for mild frost damage was approximately 70%, while for moderate to severe frost damage it was only 30–60%. Furthermore, during the recovery period, plant growth was slow, seedling vigor was weak, and some sugarcane plants failed to regrow, ultimately requiring tilling and replanting.
[0066] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.
Claims
1. A method for rapidly restoring the growth of autumn-planted sugarcane after frost, characterized in that, Includes the following steps: (1) Cleaning and treatment of frozen tissue: 2 to 3 days after the frost, cut off the frozen tissue of the above-ground part of the autumn-planted sugarcane plants that have been damaged by frost until the healthy sugarcane stem tissue or intact healthy buds are exposed, and let the cut dry. (2) Covering with plastic film for insulation: On the same day that the frozen tissue is cleaned and treated, cover the sugarcane ridge with plastic film. When covering with plastic film, keep the plastic film flat, taut and straight. Then use fine soil to cover and compact the plastic film around the sugarcane stump. (3) Breaking the film to protect the seedlings: After covering the film for heat preservation, wait 2 to 4 days until the seedlings of the autumn-planted sugarcane grow again and touch the film. Then, break the film manually in time to guide the seedlings out of the film and avoid burning or damaging the seedlings. (4) Topdressing during the recovery period: When the sugarcane seedlings have recovered and emerged uniformly, and have grown 3 to 4 leaves, spray foliar fertilizer.
2. The method for rapid recovery of autumn-planted sugarcane after frost according to claim 1, characterized in that, Step (1) also includes spraying a plant growth regulator onto the sugarcane stump cut, wherein the plant growth regulator is 1-methylcyclopropene, the application concentration is 0.5-2.0 μL / L, and the application rate is 30-40 L / mu.
3. The method for rapid recovery of autumn-planted sugarcane after frost according to claim 1, characterized in that, Step (1) also includes spraying a plant growth regulator onto the cut of the sugarcane stump. The plant growth regulator is a compound of brown algae extract and chitosan, wherein the content of brown algae extract is 10-20% and the content of chitosan is 1-5%. After compounding, the solution is diluted 500-1000 times and the application rate is 30-40 L / mu.
4. The method for rapid recovery of autumn-planted sugarcane after frost according to claim 1, characterized in that, In step (1), when autumn-planted sugarcane suffers mild frost damage, after cutting off the frozen tissue, the length of the exposed healthy sugarcane stalk tissue is 6-8 cm.
5. The method for rapid recovery of autumn-planted sugarcane after frost according to claim 1, characterized in that, In step (1), when autumn-planted sugarcane suffers moderate frost damage, after cutting off the frozen tissue, the length of the exposed healthy sugarcane stalk tissue is 4-5 cm.
6. The method for rapid recovery of autumn-planted sugarcane after frost according to claim 1, characterized in that, In step (1), when autumn-planted sugarcane suffers severe frost damage, after cutting off the frozen tissue, the length of the exposed healthy sugarcane stem tissue should be 2-3 cm, and it must be ensured that there is at least one complete healthy bud.
7. The method for rapid recovery of autumn-planted sugarcane after frost according to claim 1, characterized in that, In step (1), the specific operation of cutting is as follows: use a knife close to the ground, cut at an angle of 15 to 25 degrees with the blade facing upward, cut off in one stroke, and the cut is smooth and does not tear.
8. The method for rapid recovery of autumn-planted sugarcane after frost according to claim 1, characterized in that, In step (2), the mulch film is white and its width is 50-70cm.
9. The method for rapid recovery of autumn-planted sugarcane after frost according to claim 1, characterized in that, In step (2), the thickness of the fine soil covering is 8-10 cm.
10. The method for rapid recovery of autumn-planted sugarcane after frost according to claim 1, characterized in that, In step (4), the foliar fertilizer is a compound foliar fertilizer containing micronutrients; the foliar fertilizer is sprayed 2 to 3 times, with an interval of 5 to 7 days between each application.