A sugarcane point-line fertilization method

Abstract

This invention provides a point-to-line fertilization method for sugarcane. When planting newly planted sugarcane, single-point fertilization is adopted (the position of the sugarcane seedling); during the tillering stage, four-point fertilization is carried out at points (3), (4), (5), and (6), and the sugarcane planting furrow is fertilized in a parallel line. When planting ratoon sugarcane, four-point fertilization is carried out at points (3), (4), (5), and (6) in an isosceles trapezoidal shape of the sugarcane planting profile, and the sugarcane planting furrow is fertilized in a parallel line; during the sugarcane tillering stage, two-point fertilization is carried out at points (4) and (6) in the sugarcane planting profile, and the sugarcane planting furrow is fertilized in a parallel line; the positions of points (3) and (5) are: 20-30cm wide and 30cm deep on the left and right sides of the sugarcane planting; the positions of points (4) and (6) are: 40-60cm wide and 10cm deep on the left and right sides of the sugarcane planting. This fertilization method reduces fertilizer usage, improves fertilizer utilization, and helps sugarcane farmers reduce costs and increase efficiency; it is an efficient management approach to achieve the comprehensive goal of high-quality sugarcane production.

Description

Technical Field

[0001] This invention relates to the field of agricultural fertilization, specifically a method for applying fertilizer to sugarcane using a point-to-line method. Background Technology

[0002] Studies have found that sugarcane's fertilizer requirements vary significantly at different growth and development stages. Currently, sugarcane production in sugarcane-growing areas mainly involves applying fertilizer to the surface in one go or in multiple applications. While this method compensates for some of the shortcomings of traditional fertilization methods regarding the varying fertilizer requirements at different growth stages, it merely adjusts the amount of fertilizer and pesticides used. The lack of targeted and precise fertilization means that the yield and sugar content potential of sugarcane are still not fully realized.

[0003] Therefore, there is an urgent need for a sugarcane fertilization method to solve the problems of low sugarcane yield and low sugar content. Summary of the Invention

[0004] To address the shortcomings of existing technologies, this invention provides a sugarcane point-line fertilization method to solve some of the problems mentioned in the background art. This invention meets the nutrient requirements of sugarcane throughout its entire growth period by mechanizing, uniformly, quantitatively, and at fixed points and times during sugarcane ratoon management, reducing fertilizer usage, improving fertilizer utilization, and promoting cost reduction and efficiency for sugarcane farmers. At the same time, it simultaneously completes ridging and loosening of the stubble to improve soil aeration, ensuring that the sugarcane shoots and underground sugarcane roots receive sufficient oxygen to promote germination. The aim is to improve the sugarcane fertilization system and achieve a simplified and efficient management approach that integrates the comprehensive goals of high-yield, green, high-efficiency, ecological, and high-quality sugarcane production.

[0005] To achieve the above objectives, the present invention provides a sugarcane spot-line fertilization method, comprising the following steps:

[0006] When the sugarcane is newly planted, single-point fertilization is applied to the sugarcane planting profile at the time of planting; during the sugarcane tillering period, four-point fertilization is applied to the sugarcane at the third (3), fourth (4), fifth (5) and sixth (6) points of the sugarcane planting profile, and parallel-line fertilization is applied to the sugarcane planting furrow.

[0007] When sugarcane is in ratooning stage, four-point fertilization is carried out on the third (3), fourth (4), fifth (5) and sixth (6) points of the isosceles trapezoidal sugarcane planting profile during ratooning management, and parallel-line fertilization is carried out in the sugarcane planting furrow; during the sugarcane tillering stage, two-point fertilization is carried out on the fourth (4) and sixth (6) points of the sugarcane planting profile, and parallel-line fertilization is carried out in the sugarcane planting furrow.

[0008] The location for single-point fertilization is where the sugarcane seedlings are placed;

[0009] The location of the third point (3) is: a point 40-60cm wide and 10cm deep on the left side of the sugarcane planting;

[0010] The location of the fourth point (4) is: a point 20-30cm wide and 30cm deep on the left side of the sugarcane planting;

[0011] The location of the fifth point (5) is: a point 40-60cm wide and 10cm deep to the right of the sugarcane planting;

[0012] The location of point 6 is: 20-30cm wide and 30cm deep to the right of the sugarcane planting.

[0013] The specific amount of fertilizer applied to sugarcane is determined based on the actual soil nutrient test results, with a formula and a certain proportion of organic matter. Sugarcane requires elements including macronutrients N, P, and K, and micronutrients such as Ca, Mg, Fe, Mn, and Zn. However, the available amounts of macronutrients in the soil are generally low and cannot meet the needs of sugarcane throughout its entire growth period. Therefore, the final formula and specific fertilizer application rate need to be calculated based on the actual soil nutrient test results, the sugarcane's growth requirements, and fertilizer utilization rate. Simultaneously, micronutrient deficiencies should be addressed by timely supplementation. Fertilizer application at planting / ramp management accounts for 25% of the total fertilizer application, while fertilization during the tillering stage accounts for 75% of the total fertilizer application.

[0014] Furthermore, select organic-inorganic compound fertilizers with a strength higher than 30N and a moisture absorption rate of less than 5%;

[0015] Organic-inorganic compound fertilizers include compound fertilizers or compound fertilizers plus bio-organic fertilizers, which contain N, P2O5, K2O and organic matter.

[0016] Compound fertilizer is a formulated compound fertilizer that includes N, P2O5, and K2O; bio-organic fertilizer is an organic fertilizer produced using filter mud, bagasse, and potassium humate, which are by-products of sugar factories, as organic materials.

[0017] Furthermore, the first formula of the sugarcane-specific organic-inorganic compound fertilizer is formed into 2-4mm spherical particles after machine mixing and granulation; the second formula of the sugarcane-specific organic-inorganic compound fertilizer is formed by mechanically mixing and granulating chemical fertilizer compound fertilizer and bio-organic fertilizer into 2-4mm spherical particles.

[0018] Furthermore, the method also includes: applying 25% of the total fertilizer amount at the time of sowing / during the rootstock management period, and applying 75% of the total fertilizer amount during the tillering period.

[0019] Furthermore, the fertilization process utilizes a fully biodegradable membrane for complete coverage; the membrane has a width of 1.5–2.8 m, a thickness of 0.012–0.013 mm, and a water vapor permeability of <400 g / (m²). 2 After aging for 24 hours, the nominal strain of longitudinal fracture is ≥120% after aging for 100 hours, and the nominal strain of transverse fracture is ≥200% after aging for 100 hours.

[0020] Beneficial effects

[0021] 1. This invention promotes increased sugarcane yield and sugar content.

[0022] This sugarcane spot-and-line fertilization method uses a sugarcane-specific organic-inorganic compound fertilizer with a certain proportion of organic matter. The fertilizer is concentrated at the root growth point of the sugarcane, improving current sugarcane fertilization techniques. It moves from surface fertilization to deep fertilization, and from applying fertilizer at the base of the sugarcane to applying it at the optimal distance from the side, thus increasing sugarcane yield and sugar content. The organic matter is rich in various beneficial substances, including organic acids, peptides, and abundant nutrients such as nitrogen, phosphorus, and potassium, providing sufficient nutrients for sugarcane with a long-lasting effect. Newly planted sugarcane yield and sugar content can be increased by 559.70-716.18 kg / mu and 0.09-0.43 percentage points, respectively; ratooned sugarcane yield and sugar content can be increased by 1158.87-1179.70 kg / mu and 0.10-0.43 percentage points, respectively.

[0023] 2. This invention improves fertilizer partial productivity.

[0024] This invention facilitates nutrient uptake by sugarcane roots, reduces fertilizer surface runoff, improves fertilizer utilization efficiency, and increases fertilizer partial productivity. Compared to the control, the fertilizer partial productivity of newly planted sugarcane increased by 13.58 kg / kg and 18.09 kg / kg, respectively, representing increases of 9.14% and 11.53%. For ratooned sugarcane, the fertilizer partial productivity increased by 28.13 kg / kg and 29.79 kg / kg, respectively, representing increases of 18.06% and 18.27%. This increase in fertilizer partial productivity fully demonstrates the contribution of fertilizer and soil nutrients to sugarcane yield.

[0025] 3. This invention avoids the problem of "white pollution".

[0026] This sugarcane spot-line fertilization method, with the sugarcane covered by a fully biodegradable film, can not only increase temperature and retain moisture, promote seedling emergence, and control weeds, but also achieve high-efficiency degradation, eliminating the problems of ordinary polyethylene film being difficult to degrade and recycle.

[0027] It should be understood that the above general description and the following detailed description are exemplary and explanatory only, and do not limit this application. Attached Figure Description

[0028] The above and other objects, features and advantages of this application will become more apparent from the more detailed description of exemplary embodiments of this application taken in conjunction with the accompanying drawings, wherein the same reference numerals generally represent the same components in the exemplary embodiments of this application.

[0029] Figure 1 This is a schematic diagram of the fertilization location in a sugarcane dot-line fertilization method according to the present invention.

[0030] Figure 2 This is a schematic diagram of the fertilization location when planting newly planted sugarcane using a point-line fertilization method according to the present invention.

[0031] Figure 3 This is a schematic diagram showing the fertilization location during the tillering stage of newly planted sugarcane according to the sugarcane dot-line fertilization method of the present invention;

[0032] Figure 4 This is a schematic diagram illustrating the fertilization location during the management of ratoon sugarcane using a point-line fertilization method according to the present invention.

[0033] Figure 5 This is a schematic diagram illustrating the fertilization location during the tillering stage of ratoon sugarcane, a method for applying fertilizer in a point-line manner according to the present invention.

[0034] The specific numbers in the diagram:

[0035] Point 1 (1) and point 2 (2) are the fertilization profile points when newly planted sugarcane is sown;

[0036] The locations of the third point (3) and the seventh point (7) are: 20-30cm wide and 30cm deep to the left of the sugarcane planting;

[0037] The location of the fourth point (4) is: a point 40-60cm wide and 10cm deep on the left side of the sugarcane planting;

[0038] The positions of the fifth point (5) and the ninth point (9) are: 20-30cm wide and 30cm deep to the right of the sugarcane planting;

[0039] The positions of the sixth point (6) and the eighth point (8) are: 40-60cm wide and 10cm deep to the right of the sugarcane planting;

[0040] Points 10 (10), 11 (11), 12 (12) and 13 (13) are the profile points of sugarcane planting locations. Detailed Implementation

[0041] Embodiments of this application will now be described in more detail with reference to the accompanying drawings. While embodiments of this application are shown in the drawings, it should be understood that this application may be implemented in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided to make this application more thorough and complete, and to fully convey the scope of this application to those skilled in the art.

[0042] The nutrient requirements of sugarcane vary greatly at different growth stages, generally showing a pattern of lower requirements at the beginning and end, and higher requirements in the middle. Budding stage: Primarily relies on nutrients stored in the seedling itself, requiring no external nutrient absorption. Seedling stage: Nutrient requirements are extremely low, but urgent, with nitrogen, phosphorus, and potassium requirements accounting for less than 1%, with slightly higher nitrogen requirements followed by phosphorus and potassium. Tillering stage: Nutrient requirements gradually increase, with nitrogen, phosphorus, and potassium absorption accounting for 6%, 5.5%, and 3%, respectively. Elongation stage: A critical fertilization period for sugarcane, with nitrogen absorption accounting for approximately 50%–60%, and phosphorus and potassium absorption each accounting for 70%. Maturity stage: Nutrient requirements decrease, with nitrogen absorption accounting for 30%–40%, and phosphorus and potassium each accounting for approximately 20%.

[0043] A sugarcane spot-line fertilization method is a green and environmentally friendly technology that integrates mechanization, specialized fertilizers, agricultural cultivation measures, and a fully biodegradable membrane. Specifically, it combines mechanized ridging and loosening of the sugarcane stubble with fertilizer application during planting, ratooning management, and the tillering stage. In this process, organic-inorganic compound fertilizer is applied in strips, evenly, at fixed times, quantities, and locations on both sides of the sugarcane stalks at the root growth points during planting, ratooning management, and the tillering stage, according to the actual growth needs of the sugarcane. Furthermore, it improves upon existing sugarcane fertilization techniques by moving from surface fertilization to deep fertilization and from applying fertilizer directly to the stubble to applying it at a certain distance from the side, reducing fertilizer loss and improving fertilizer utilization. This invention not only determines the different distances and depths for fertilizing the root growth points during sugarcane planting / ratonic management and tillering, but also provides an in-depth and detailed description of the sugarcane point-line fertilization method based on different terrains, geological conditions, field row spacing, and sugarcane basket depths.

[0044] The key to the sugarcane point-line fertilization method lies in selecting suitable organic-inorganic compound fertilizers that can be applied by mechanization and meet the needs of sugarcane throughout its entire growth period, using fully biodegradable membranes for insulation, water retention and moisture conservation, and rationally allocating human and material resources to achieve a high-efficiency, green and high-quality sugarcane production strategy.

[0045] Example 1:

[0046] This invention provides a technical solution: a sugarcane dot-line fertilization method, the fertilization method is described in the appendix. Figure 1 , Figure 2 and Figure 3 Taking the sugarcane grown on the dry slopes by overseas Chinese in Gengma Dai and Wa Autonomous County, Lincang City, Yunnan Province as an example, the main steps include:

[0047] Step 1: Select round-grained fertilizer that meets the intensity requirements for mechanized fertilization. The fertilizer should have a smooth surface, a particle strength higher than 30N, low moisture absorption, and should not clump, stick, or break when squeezed by hand. It should be a sugarcane-specific organic-inorganic compound fertilizer with a moisture absorption rate of less than 5%. Formula 1: Total nutrients ≥33%, N+P2O5+K2O: 17-7-9, organic matter content ≥15% (the organic matter portion is potassium humate, a sugarcane byproduct); Formula 2: Compound fertilizer (total nutrients ≥36%, N+P2O5+K2O: 16-7-13) + bio-organic fertilizer (total nutrients ≥5%, 45% organic matter, 200 million live bacteria / g, moisture 10%).

[0048] Step 2: The terrain is dry, gently sloping land with red soil. The row spacing in the field is 1.2m. Fertilizer application settings for Formula 1: At the time of sowing / perennial management, the fertilizer application at the designated point is 25% of the total fertilizer application of 120kg / mu, i.e., 30kg / mu; at the tillering stage, the fertilizer application at the designated point is 75% of the total fertilizer application of 120kg / mu, i.e., 90kg / mu. Fertilizer application settings for Formula 2: At the time of sowing / perennial management, the fertilizer application at the designated point is 25% of the total fertilizer application of 80kg / mu + 120kg / mu, i.e., 24kg / mu + 30kg / mu; at the tillering stage, the fertilizer application at the designated point is 75% of the total fertilizer application of 80kg / mu + 120kg / mu, i.e., 56kg / mu + 90kg / mu.

[0049] Step 3: For newly planted sugarcane, apply fertilizer at a single point on the sugarcane planting profile (fertilize at the location where the seedlings are placed). For ratooned sugarcane, apply fertilizer at four points on the sugarcane planting profile: the third (3), fourth (4), fifth (5), and sixth (6). Apply fertilizer in parallel lines in the sugarcane planting furrow (connect the points of the parallel lines in the sugarcane planting furrow to form a line for fertilization).

[0050] Step 4: Select a fully biodegradable membrane for full membrane coverage. The fully biodegradable membrane is 1.5m wide, 0.012mm thick, and has a water vapor permeability of 395g / (m³). 2 The nominal strain at fracture (longitudinal) after aging for 24 hours was 227% after aging for 100 hours, and the nominal strain at fracture (transverse) after aging for 100 hours was 438%.

[0051] Step 5: During the sugarcane tillering stage, apply fertilizer at four points on the sugarcane planting profile: the third (3), fourth (4), fifth (5), and sixth (6) points. Apply fertilizer in parallel lines in the sugarcane planting furrows (connecting the parallel lines of the sugarcane planting furrows to form a line for fertilization). For ratooned sugarcane, apply fertilizer at two points on the sugarcane planting profile: the fourth (4) and sixth (6) points. Apply fertilizer in parallel lines in the sugarcane planting furrows (connecting the parallel lines of the sugarcane planting furrows to form a line for fertilization).

[0052] The location of the third point (3) is: a point 60cm wide and 10cm deep on the left side of the sugarcane planting;

[0053] The location of the fourth point (4) is: 30cm wide and 30cm deep on the left side of the sugarcane planting;

[0054] The location of the fifth point (5) is: a point 60cm wide and 10cm deep to the right of the sugarcane planting;

[0055] The location of point 6 is: 30cm wide and 30cm deep to the right of the sugarcane planting.

[0056] The location and depth of fertilization should be determined based on the actual geographical environment and soil type:

[0057] Dry flat land: Flat land itself has no slope, and the distance and depth of mechanical fertilization can be determined only based on the row spacing and the depth of the sugarcane stubble: When the sugarcane row spacing is 1.2m, the distance between fertilization points during the tillering stage is 30cm wide and 30cm deep on both sides of the sugarcane, and 60cm wide and 10cm deep; when the sugarcane row spacing is 0.8m, the distance between fertilization points during ratooning management is 30cm wide and 30cm deep on both sides of the sugarcane, and 60cm wide and 10cm deep, and the distance for fertilization during the tillering stage is 40cm on both sides of the sugarcane.

[0058] Dry terraces: Terraces are essentially flat land, but due to their generally narrow characteristics, different solutions are needed for digging horizontal and vertical trenches. When digging vertical trenches in narrower areas, it is difficult to achieve mechanized fertilization driven by large tractors. Small hydraulic mechanized fertilization should be selected, with the fertilization distance and depth the same as on flat land.

[0059] When sugarcane is planted on sloping land, the distance and depth of mechanical fertilization need to be determined based on the slope, row spacing, and sugarcane stubble depth. Because sugarcane roots exhibit geotropism, the location of fertilization at the root growth point needs to be adjusted for different slopes. Fertilization methods suitable for dry, flat land can also be applied.

[0060] When the soil is sandy, the roots are more likely to grow deep. The fertilization distance remains the same, but the fertilization depth should be appropriately increased by 5-10cm.

[0061] When the soil is clay, the roots should not grow too deep. The fertilization distance remains the same, but the fertilization depth should be appropriately shallower, about 5cm.

[0062] When the soil is loam, fertilize normally according to the different fertilization locations mentioned above.

[0063] In this embodiment, the sugarcane-specific organic-inorganic compound fertilizer includes two formulations. Formula one is: total nutrients ≥33%, organic matter content ≥15% (organic matter is potassium humate, a byproduct of sugarcane); Formula two is: compound fertilizer + bio-organic fertilizer (produced using filter mud, bagasse, and potassium humate, byproducts of sugar mills, as organic materials). The total nutrients of the compound fertilizer are 36%, i.e., N, P2O5, K2O = 16-7-13. The bio-organic fertilizer has N+P2O5+K2O ≥5%, organic matter content ≥45%, effective viable bacteria count ≥200 million / g, pH ≤8.5, and moisture ≤13%.

[0064] In this embodiment, the sugarcane-specific organic-inorganic compound fertilizer formula is formed into 2-4mm spherical particles by machine mixing and granulation.

[0065] In this embodiment, the distance, depth, and amount of mechanical fertilization need to be adjusted according to the terrain, geological conditions, row spacing, cane depth, planting period, growth stage, and sugarcane variety. In this plot, the sugarcane row spacing is 120cm. During the tillering stage, fertilization is applied at points 30cm wide and 30cm deep on both sides of the sugarcane planting, and at points 60cm wide and 10m deep on both sides. For ratoon sugarcane under ratoon management, fertilization is applied at points 30cm wide and 30cm deep on both sides of the sugarcane planting, and at points 60cm wide and 10m deep on both sides. During the tillering stage, fertilization is applied at points 60cm wide and 10m deep on both sides of the sugarcane planting.

[0066] In this embodiment, the amount of fertilizer applied is determined based on factors such as variety, target yield, and soil fertility, and the specific amount of fertilizer is specified by soil testing and formula application as much as possible. The organic matter content of sugarcane fertilizer should account for a certain proportion. The specific amount of fertilizer is 120 kg / mu of 33% organic-inorganic compound fertilizer in Formula 1 and 80 kg / mu of 36% compound fertilizer + 120 kg / mu of bio-organic fertilizer in Formula 2. Based on different periods, the fertilizer application rates for Formula 1 are as follows: At the sowing / rhizome management stage, the fertilizer application rate at the designated location is 25% of the total fertilizer application rate of 120 kg / mu, i.e., 30 kg / mu; at the tillering stage, the fertilizer application rate at the designated location is 75% of the total fertilizer application rate of 120 kg / mu, i.e., 90 kg / mu. The fertilizer application rates for Formula 2 are as follows: At the sowing / rhizome management stage, the fertilizer application rate at the designated location is 25% of the total fertilizer application rate of 80 kg / mu + 120 kg / mu, i.e., 24 kg / mu + 30 kg / mu; at the tillering stage, the fertilizer application rate at the designated location is 75% of the total fertilizer application rate of 80 kg / mu + 120 kg / mu, i.e., 56 kg / mu + 90 kg / mu.

[0067] In this embodiment, the width and thickness, water vapor transmission rate, nominal strain at break (longitudinal) after 100 hours of aging, and nominal strain at break (transverse) after 100 hours of aging of the fully biodegradable film all meet the GB / T35795-2017 standard "Fully Biodegradable Agricultural Ground Cover Film".

[0068] Comparative Example 1

[0069] Experimental method: Following the sugarcane spot-line fertilization method provided in Example 1, taking newly planted and ratooned sugarcane spot-line fertilization as examples, single-point fertilization (fertilization at the seed bud placement position) is carried out only at the time of planting / ratoon management. The fertilizer amount of Formula 1 is 120 kg / mu, and the fertilizer amount of Formula 2 is 80 kg / mu compound fertilizer + 120 kg / mu organic fertilizer. No fertilizer is applied during the tillering stage.

[0070] Experimental Results: Table 1 shows that, compared with Example 1 and Comparative Example 1, the sugarcane fertilization method significantly promoted sugarcane yield, sugar content, and fertilizer utilization. By changing the fertilization location and method, point-line fertilization at different growth stages of sugarcane significantly improved the single stalk weight, yield, and fertilizer partial productivity of sugarcane. Compared with Comparative Example 1, the yield and sugar content of newly planted sugarcane in Formula 1 of Example 1 increased by 716.18 kg / mu and 0.43 percentage points, respectively; the yield and sugar content of ratooned sugarcane increased by 1179.70 kg / mu and 0.09 percentage points, respectively. The yield and sugar content of newly planted sugarcane in Formula 2 of Example 1 increased by 559.70 kg / mu and 0.10 percentage points, respectively; the yield and sugar content of ratooned sugarcane increased by 1158.87 kg / mu and 0.43 percentage points, respectively.

[0071] Table 1. Effects of different fertilization methods on yield, sucrose content, and fertilizer partial productivity of newly planted and ratooned sugarcane.

[0072]

[0073] Example 2

[0074] A method for spot-line fertilization of sugarcane, employing a typical fertilization method of this invention, taking dry terrace sugarcane in Mengding Town, Gengma Dai and Wa Autonomous County, Lincang City, Yunnan Province as an example, includes the following steps:

[0075] Step 1: Select round-grained fertilizers that meet the intensity of mechanized fertilization, with smooth surfaces, a particle strength higher than 30N, low moisture absorption, no clumping, no sticking, and can not be crushed by hand. Sugarcane compound fertilizer (total nutrients ≥36%, N+P2O5+K2O: 16-7-13) + bio-organic fertilizer (total nutrients ≥5%, 45% organic matter, 200 million effective live bacteria / g, 10% moisture).

[0076] Step 2: The terrain is dry terraced, the soil is red soil, the row spacing in the field is 1.2m, the point fertilizer application at the time of sowing is 25% of the total fertilizer application of 120kg / mu, that is, 30kg / mu; the point line fertilizer application during the tillering period is 75% of the total fertilizer application of 120kg / mu, that is, 90kg / mu, and the fertilizer application for each line is 22.5kg / mu;

[0077] Step 3: When planting sugarcane, apply fertilizer at a single point on the sugarcane planting profile (fertilize at the location where the seedlings are placed) and apply fertilizer in parallel lines in the sugarcane planting furrows (connect the points in the parallel lines of the sugarcane planting furrows to form a line for fertilization).

[0078] Step 4: Select a fully biodegradable membrane for full membrane coverage. The fully biodegradable membrane is 1.5m wide, 0.012mm thick, and has a water vapor permeability of 395g / (m³). 2 The nominal strain at fracture (longitudinal) after aging for 24 hours was 227% after aging for 100 hours, and the nominal strain at fracture (transverse) after aging for 100 hours was 438%.

[0079] Step 5: During the sugarcane tillering stage, apply fertilizer to newly planted sugarcane at the third (3), fourth (4), fifth (5), and sixth (6) points of the sugarcane planting profile in a four-point isosceles trapezoidal pattern (points 30cm wide and 30cm deep on both sides of the sugarcane planting and points 60cm wide and 10m deep on both sides). Apply fertilizer in a parallel line pattern to the sugarcane planting furrow (connecting the parallel lines of the sugarcane planting furrow forms a linear fertilization pattern).

[0080] Comparative Example 2

[0081] Experimental method: Following the sugarcane spot-line fertilization method provided in Example 2, taking newly planted sugarcane as an example, Comparative Example 2 followed steps one, three, and four above, applying fertilizer at a single point on the sugarcane planting profile (fertilizing at the location of the seed bud) and applying fertilizer in parallel lines in the sugarcane planting furrows (connecting the parallel lines of the sugarcane planting furrows to form a line), with a fertilizer application rate of 120 kg / mu 25%, or 30 kg / mu. In step five, during the tillering stage, fertilizer was also applied at a single point on the sugarcane growth point and applied in parallel lines in the sugarcane planting furrows (connecting the parallel lines of the sugarcane planting furrows to form a line), with a fertilizer application rate of 120 kg / mu 75%, or 90 kg / mu.

[0082] Experimental Results: Table 2 shows that, comparing the schemes of Example 2 and Comparative Example 2, different fertilization locations and methods significantly affect sugarcane yield, sugar content, and fertilizer utilization. Point-to-line fertilization at different growth stages of sugarcane significantly increased single-stalk weight, yield, and fertilizer partial productivity. Compared with Comparative Example 2, the yield, sugar content, and fertilizer partial productivity of newly planted sugarcane in Example 2 increased by 1149.05 kg / mu, 0.47 percentage points, and 29.01 kg / kg, respectively, representing increases of 21.03%, 3.30%, and 31.03%.

[0083] Table 2. Effects of different fertilization methods on yield, sucrose content, and fertilizer partial productivity of newly planted sugarcane.

[0084]

[0085] The various embodiments of this application have been described above. These descriptions are exemplary and not exhaustive, nor are they limited to the disclosed embodiments. Many modifications and variations will be apparent to those skilled in the art without departing from the scope and spirit of the described embodiments. The terminology used herein is chosen to best explain the principles, practical application, or improvement of the technology in the market, or to enable others skilled in the art to understand the embodiments disclosed herein.

Claims

1. A method for applying fertilizer to sugarcane using a point-to-line method, characterized in that, The method includes the following steps: When the sugarcane is newly planted, single-point fertilization is carried out on the sugarcane planting profile; during the sugarcane tillering stage, four-point fertilization is carried out on the sugarcane planting profile at the third (3), fourth (4), fifth (5) and sixth (6) points, and parallel-line fertilization is carried out in the sugarcane planting furrow. When the sugarcane is ratoon sugarcane, four-point fertilization is carried out on the ratoon sugarcane at the third (3), fourth (4), fifth (5) and sixth (6) points of the sugarcane planting profile, and parallel-line fertilization is carried out in the sugarcane planting furrow; during the sugarcane tillering period, two-point fertilization is carried out on the ratoon sugarcane at the fourth (4) and sixth (6) points of the sugarcane planting profile, and parallel-line fertilization is carried out in the sugarcane planting furrow. The location for single-point fertilization is the placement position of the sugarcane seedlings; The location of the third point (3) is: a point 40-60cm wide and 10cm deep on the left side of the sugarcane planting; The location of the fourth point (4) is: a point 20-30cm wide and 30cm deep on the left side of the sugarcane planting; The location of the fifth point (5) is: a point 40-60cm wide and 10cm deep on the right side of the sugarcane planting; The location of the sixth point (6) is: a point 20-30cm wide and 30cm deep to the right of the sugarcane planting; The location and depth of fertilization are further subdivided according to the actual geographical environment and soil type: For dry flat land: When the sugarcane row spacing is 1.2m, the distance between fertilizer application points during the tillering stage is 30cm wide and 30cm deep on both sides of the sugarcane, and 60cm wide and 10cm deep on both sides; when the sugarcane row spacing is 0.8m, the distance between fertilizer application points during ratoon management is 30cm wide and 30cm deep on both sides of the sugarcane, and 60cm wide and 10cm deep on both sides; the distance between fertilizer application points during the tillering stage is 40cm on both sides of the sugarcane. Dry terraces: Fertilization distance and depth are the same as on flat land; Dry slopes: Fertilization methods suitable for dry flat land; When the soil is sandy, the fertilization distance remains the same, and the fertilization depth is 5-10cm deeper; When the soil is clay, the fertilization distance remains the same, but the fertilization depth is shallower, 5cm. When the soil is loam, apply fertilizer normally according to the different terrain and fertilizer application locations.

2. The fertilization method according to claim 1, characterized in that, The fertilizer selected in the method is an organic-inorganic compound fertilizer with an intensity higher than 30N and a moisture absorption rate of less than 5%. The organic-inorganic compound fertilizer includes a formula compound fertilizer or compound fertilizer plus bio-organic fertilizer, which includes N, P2O5, K2O and organic matter. The compound fertilizer is a formulated compound fertilizer including N, P2O5, and K2O; the bio-organic fertilizer is an organic fertilizer produced using sugar factory by-products such as filter mud, bagasse, and potassium humate as organic materials.

3. The fertilization method according to claim 2, characterized in that, The first organic-inorganic compound fertilizer formula is formed into 2-4mm spherical particles after machine mixing and granulation; the second organic-inorganic compound fertilizer formula is formed by mechanically mixing and granulating chemical compound fertilizer and bio-organic fertilizer into 2-4mm spherical particles.

4. The fertilization method according to claim 1, characterized in that, The method further includes applying 25% of the total fertilizer at the time of sowing / during the rootstock management period, and 75% of the total fertilizer at the tillering stage.

5. The fertilization method according to claim 1, characterized in that, The fertilization process described herein involves full coverage with a fully biodegradable membrane; the membrane has a width of 1.5-2.8 m, a thickness of 0.012-0.013 mm, and a water vapor permeability of <400 g / (m²). 2 After aging for 24 hours, the nominal strain of longitudinal fracture is ≥120% after aging for 100 hours, and the nominal strain of transverse fracture is ≥200% after aging for 100 hours.

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