Efficient cultivation method for reducing chlorine content of tobacco field

Abstract

The invention provides an efficient cultivation method for reducing the chlorine content of a tobacco field. The method comprises the steps that after tobacco leaves are picked, field residues are cleaned; deep ploughing is conducted for at least 30 cm 15-20 days before crop rotation, drainage ditches with the depth being 15-20 cm and distributed in a # shape are formed, and soaking is conducted once every 6-7 days and is continuously conducted twice or more, and 24 hours are conducted every time. Small spring crops of peas or broad beans are planted, and the density is 50-70 kilograms per hectare. Deep ploughing is conducted again after harvesting, and water management is guaranteed through the drip irrigation or micro-spray irrigation technology. And the ridging equipment is provided with a plurality of ridging modules and transverse ditching cutter cylinders, so that the integrated operation of ridging and ditching is realized, and the working efficiency is improved. According to the method, deep ploughing, water soaking and crop rotation are combined, and a complete and efficient soil chlorine content control system is formed. The problem that the content of chloride ions in soil is high is solved, the soil quality is comprehensively improved through a series of comprehensive measures, and the method conforms to the development trend of green agriculture and has important application and popularization value.

Description

Technical Field

[0001] The invention relates to the technical field of tobacco planting, and in particular to a high-efficiency cultivation method for reducing the chlorine content in tobacco fields. Background Art

[0002] As an important economic crop, tobacco is widely grown around the world, and its growth and final product quality are extremely sensitive to soil conditions. It is particularly noteworthy that tobacco is a chlorine-sensitive crop, that is, chloride ions (Cl - ) content has a significant impact on its growth and development as well as the quality of tobacco leaves. When the chloride ion concentration in the soil is too high, it will have a negative impact on the normal physiological functions of tobacco.

[0003] Effects of Chloride Ions on Tobacco

[0004] Absorption and accumulation: During the entire growth cycle of tobacco, chloride ions in the soil will be absorbed into the tobacco through the root system and gradually accumulate in the tobacco leaves. If this accumulation exceeds a certain limit, it will inhibit the normal growth and development of tobacco.

[0005] Physiological disorders: Excessive chloride ions can damage the tobacco root system, hinder the absorption of water and nutrients, and cause the leaves to become scorched and yellowed.

[0006] The quality of tobacco leaves decreases: Tobacco leaves with high chlorine content are lighter in color, lack luster, are difficult to cut into shreds, have poor combustion performance, and have a pungent taste, all of which will reduce the industrial value of tobacco leaves and cannot meet the market demand for high-quality tobacco products.

[0007] Causes of increased soil chlorine content

[0008] As agricultural activities develop, many factors have contributed to the increase in soil chloride levels in tobacco fields:

[0009] Unreasonable use of fertilizers: For a long time, some tobacco farmers have relied too much on fertilizers containing high chlorine content in pursuit of short-term yields, which directly increases the chlorine load in the soil.

[0010] Influence of climate conditions: Under dry and rainy climate conditions, chloride ions in the soil are difficult to be lost with water and tend to accumulate on the surface.

[0011] Poor drainage: If the soil does not drain well, chloride ions will remain in the soil after excessive irrigation, further exacerbating the problem of chlorine contamination.

[0012] Continuous cropping obstacles: Continuous cropping of tobacco will not only reduce soil fertility, but may also cause the accumulation of certain harmful substances in the soil, forming a vicious circle.

[0013] Therefore, an efficient cultivation method for reducing the chlorine content in tobacco fields is proposed to solve the above problems. Summary of the invention

[0014] The present invention provides an efficient cultivation method for reducing the chlorine content in tobacco fields, aiming to solve the negative impact of excessive chlorine content in the soil on tobacco growth and tobacco leaf quality in the prior art. Through a series of scientific and reasonable agricultural measures, the present invention can not only effectively reduce the chloride ion content in tobacco field soil, but also improve the physical and chemical properties of the soil, improve tobacco quality, and at the same time reduce the input costs of tobacco farmers and increase economic benefits.

[0015] In this method, first, the tobacco plants remaining in the field are cleaned up immediately after the tobacco leaves are picked. This operation can effectively prevent the spread of diseases and pests, avoid the plant tissues remaining in the field from becoming overwintering places for pathogens or pests, reduce the chloride ion content in the soil, and thus ensure the safe planting of subsequent crops.

[0016] Next, 15-20 days before the early spring crop rotation, use deep tillage equipment to till the soil to a depth of at least 30 cm to break up soil compaction, promote root growth, and help remove chloride ions in the deep soil during the soaking stage. Set up drainage ditches with a depth of 15-20 cm, one every 5 ridges, in a "well" or "cross" shape. The design of the drainage ditch ensures good drainage performance, prevents water retention and salt accumulation, and ensures effective drainage and reduces the accumulation of chloride ions in the soil.

[0017] Afterwards, soak in water once every 6 to 7 days, and soak in water for more than two times in a row, with each soaking time of 24 hours. This method can effectively remove chloride ions and other soluble salts in the soil through irrigation water, significantly reduce the chlorine content in the soil, improve the soil environment, and is conducive to the healthy growth of tobacco.

[0018] Further description of the above method, the depth of the drainage ditch is 15-20 cm. This design ensures sufficient drainage capacity without damaging the soil structure due to excessive depth. A drainage ditch is set every 5 ridges or so, forming a "well" or "cross" distribution. This layout makes the water flow in the entire field more uniform and enhances the effect of eluting chloride ions. Each soaking in water for 24 hours is enough time for water to fully penetrate into the deep soil layer, carrying out excess chloride ions to the maximum extent, while avoiding the problem of too fast evaporation of water, and improving the efficiency of water resource utilization.

[0019] Preferably, early spring crops such as peas or broad beans are selected for planting, and the planting density is set at 50 to 70 kg per hectare. These crops are not only excellent rotation crops, but their roots have strong nitrogen fixation and absorption of excess salt, which helps to improve soil texture and increase soil organic matter content. In addition, reasonable control of planting density can maximize its salt absorption without affecting the growth of the crops themselves, further reduce soil chlorine pollution, and improve soil fertility.

[0020] Furthermore, after the early spring crops are harvested, deep plowing equipment is used again to plow the soil layer to at least 30 centimeters. In this process, the pH value and chloride ion content of the tobacco field soil are first tested, and lime powder is added to the soil to make the soil pH range from 5.8 to 6.5. At the same time, according to the test results, 500 to 1000 kg of zeolite or bentonite is added per mu of land. Lime powder can adjust the pH value of acidic soil, making it more suitable for tobacco growth, and promote the combination of chloride ions and calcium ions to form insoluble compounds, thereby reducing their mobility in the soil and plant absorption. Zeolite and bentonite, due to their good cation exchange properties, can fix chloride ions in the soil and reduce the possibility of their absorption by tobacco. This step not only improves the chemical properties of the soil, but also provides better basic conditions for subsequent tobacco planting.

[0021] Preferably, in order to ensure water management after transplanting tobacco seedlings, drip irrigation or micro-sprinkler irrigation is used. These two water-saving irrigation technologies can accurately provide the tobacco seedlings with the required water, avoiding the water waste caused by traditional flooding and the problems of salt concentration on the soil surface and accumulation of chloride ions in the surface soil. The drip irrigation system can directly transport water to the vicinity of the root zone, maintain appropriate soil moisture, and promote rapid rooting of tobacco seedlings; micro-sprinkler irrigation can evenly moisten the surface soil, create a good microclimate environment, and help the tobacco seedlings grow healthily, while also reducing the risk of salt changes caused by excessive or insufficient water.

[0022] The present invention specially designs an efficient ridging device, including a plurality of evenly installed ridging modules, each module consisting of a mounting seat, a soil-breaking plowshare, a spring telescopic member, an adjusting rod and a ridger. The soil-breaking plowshare is used for preliminary cutting of the soil, and the adjusting rod allows the operating depth to be adjusted to adapt to different soil conditions; the ridger is responsible for the final shaping, and flexible adjustment is achieved through the spring telescopic member to ensure that the ridge shape is regular and highly consistent.

[0023] Furthermore, there are five ridging modules evenly distributed on the ridging equipment to ensure uniform ridge spacing, which is conducive to mechanized operation and later management. The longitudinal furrowing plowshares with adjustable depth set on both sides of the ridging equipment can adjust the furrowing depth according to actual needs, ensuring that furrows are dug while ridging, so that excess water can be quickly discharged to prevent salinization caused by excessively high groundwater levels, which also helps to remove some dissolved chloride ions.

[0024] Even better, the ridging equipment is also equipped with a transverse ditching knife cylinder, which is installed behind the ridging module through the landing gear to achieve "cross" ditch excavation in certain positions. The hydraulic rod on the landing gear drives the lifting and lowering of the transverse ditching knife cylinder, and the transmission shaft drives the knife cylinder to rotate, realizing the integrated operation of ridging and ditching. This design can not only complete multiple tasks at one time, saving time and labor, but also accurately control the ditching depth and width, ensure good drainage between ridges, reduce the probability of disease, and also help to carry out subsequent work such as fertilization and sowing.

[0025] Further description of the above scheme, the ridging equipment is equipped with a traction device, which is convenient for use with a tractor or other agricultural machinery. The traction device can also adjust the working speed as needed to ensure that the ridging quality is not affected, while reducing labor intensity and improving the modernization level of agricultural production.

[0026] By implementing the above method, the present invention can bring the following significant benefits:

[0027] Significantly reduce soil chlorine content: According to experimental data, the soil chlorine content after applying the method of the present invention is reduced by more than 41% compared with the traditional method, which greatly improves the soil environment and is conducive to the healthy growth of tobacco.

[0028] Improve tobacco leaf quality: The chlorine content in tobacco leaves is greatly reduced (about 41%-58%), making the tobacco leaves more colorful, glossy, easier to cut, with better combustion performance and a mellower taste, thereby increasing the industrial availability and market value of tobacco leaves.

[0029] Improve soil quality: Continuing this approach can gradually restore and enhance the physical and chemical properties of the soil, such as increasing soil permeability, water retention and fertility, forming a virtuous circle.

[0030] Eco-friendly and sustainable development: The invention emphasizes natural agricultural practices, reduces dependence on chemical substances, promotes the maintenance of soil biodiversity, and helps to establish a long-term stable ecosystem.

[0031] Increased economic benefits: unnecessary fertilizer and pesticide expenses are reduced, while tobacco farmers can obtain higher sales prices and total benefits due to improved tobacco leaf quality and yield.

[0032] The main innovation of the present invention is to combine deep plowing, soaking and crop rotation to form a complete and efficient soil chlorine content control system. It not only solves the problem of soil chlorine pollution, but also achieves a comprehensive improvement in soil quality through a series of comprehensive measures. This method is in line with the development trend of green agriculture and meets actual production needs, and has important promotion and application value. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0034] Figure 1 A schematic diagram of the overall process provided by an embodiment of the present invention;

[0035] Figure 2 A schematic diagram of a top view of a ridging device provided in an embodiment of the present invention;

[0036] Figure 3 A schematic side view of a ridging device provided in an embodiment of the present invention;

[0037] Figure 4 A schematic diagram of the structure of a ridging device provided in an embodiment of the present invention;

[0038] Figure 5 A schematic diagram of the ridging module structure provided in an embodiment of the present invention.

[0039] Among them, the reference numerals in the figure are:

[0040] 1. Horizontal furrowing knife drum; 2. Ridge module; 21. Soil-breaking plowshare; 22. Spring telescopic part; 23. Rotating shaft; 24. Ridder; 25. Adjusting rod; 26. Mounting seat; 3. Longitudinal furrowing plowshare; 4. Transmission shaft; 5. Hydraulic rod; 51. Landing gear.

[0041] The above drawings have shown clear embodiments of the present invention, which will be described in more detail below. These drawings and text descriptions are not intended to limit the scope of the present invention in any way, but to illustrate the concept of the present invention for those skilled in the art by referring to specific embodiments. DETAILED DESCRIPTION

[0042] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0043] To make the technical solutions and advantages of the present invention more clear, the embodiments of the present invention will be described in further detail below with reference to the accompanying drawings.

[0044] The present invention discloses a high-efficiency cultivation method for reducing the chlorine content in tobacco fields, such as Figure 1 As shown, in this method, first, the tobacco plants remaining in the field are cleaned up immediately after the tobacco leaves are picked to prevent the spread of pests and diseases, avoid the plant tissues remaining in the field from becoming overwintering places for pathogens or pests, and reduce the chloride ion content, thereby ensuring the safe planting of subsequent crops. 15-20 days before the rotation of the early spring crops, use deep tillage equipment to plow the soil layer to a depth of at least 30 cm to break the soil compaction, promote root growth, and help soak in water later to remove chloride ions in the deep soil. When the deep tillage equipment is working, it can simultaneously dig drainage ditches with a depth of 15-20 cm, one every 5 ridges, and distribute them in a "well" or "cross" shape. The design of the drainage ditch ensures good drainage performance, prevents water retention from causing salt accumulation, and ensures effective drainage and reduces the accumulation of chloride ions in the soil, removing chloride ions in the soil.

[0045] Afterwards, soak in water once every 6 to 7 days, and soak in water for more than two times in a row, with each soaking time of 24 hours. After soaking in water completely, drain the water quickly, and take away the chloride ions and other soluble salts in the soil through irrigation water, which significantly reduces the chlorine content in the soil, improves the soil environment, and is conducive to the healthy growth of tobacco.

[0046] It should be noted that the depth of the drainage ditch is 15-20 cm. This design ensures sufficient drainage capacity without damaging the soil structure due to excessive depth. A drainage ditch is set up every 5 ridges or so, forming a "well" or "cross" distribution. This layout makes the water flow more evenly throughout the field and enhances the effect of eluting chloride ions. Each soaking in water for 24 hours is enough time for the water to fully penetrate into the deep soil layer, carrying out excess chloride ions to the maximum extent, while avoiding the problem of water evaporation too quickly, and improving the efficiency of water resource utilization.

[0047] The present invention selects to plant early spring crops such as peas or broad beans, and the planting density is set to 50 to 70 kilograms per hectare. Peas and broad beans belong to leguminous plants, and their roots are symbiotic with rhizobia, which can fix nitrogen in the air and convert it into a form that can be used by plants. This not only reduces the demand for exogenous nitrogen fertilizers, but also increases the content of organic nitrogen in the soil, helps to improve soil fertility, and provides more abundant nutrients for subsequent tobacco planting. The root systems of the two crops have strong water absorption and salt tolerance, and can absorb chloride ions and other soluble salts in the soil to a certain extent. By means of crop rotation, peas and broad beans can effectively reduce the chlorine content in the soil during growth and alleviate the problem of soil salinization.

[0048] In addition: Peas and beans have well-developed and deep root systems that can penetrate compacted soil layers, increase soil porosity, and promote air circulation and water infiltration. This physical action helps break up the plow bottom layer, improve soil aeration and water permeability, and thus facilitate the development of tobacco roots. Rotating peas or beans can also break the life cycle of pests and diseases, reduce the number of specific pathogens and pests, and reduce the incidence of pests and diseases during tobacco growth. In addition, diversified crop planting helps maintain farmland biodiversity and promotes the stability and health of the ecosystem.

[0049] After the early spring crops are harvested, deep plowing equipment is used again to plow the soil layer to at least 30 centimeters. In this process, the pH value and chloride ion content of the tobacco field soil are first tested, and lime powder is added to the soil to make the soil pH range 5.8-6.5. At the same time, according to the test results, 500 to 1000 kg of zeolite or bentonite are added per mu of land. Lime powder can adjust the pH value of acidic soil, making it more suitable for tobacco growth, and promote the combination of chloride ions and calcium ions to form insoluble compounds, thereby reducing their mobility in the soil and plant absorption. Zeolite and bentonite have good cation exchange properties, which can fix chloride ions in the soil and reduce the possibility of their absorption by tobacco. This step not only improves the chemical properties of the soil, but also provides better basic conditions for subsequent tobacco planting.

[0050] In order to ensure water management after transplanting tobacco seedlings, drip irrigation or micro-sprinkler irrigation is used. These two water-saving irrigation technologies can accurately provide the tobacco seedlings with the required water, avoiding the water waste caused by traditional flooding and the problems of salt concentration on the soil surface and accumulation of chloride ions in the surface soil. The drip irrigation system can directly transport water to the vicinity of the root zone, maintain appropriate soil moisture, and promote the rapid rooting of tobacco seedlings; micro-sprinkler irrigation can evenly moisten the surface soil, create a good microclimate environment, and help the tobacco seedlings grow healthily, while also reducing the risk of salt changes caused by excessive or insufficient water.

[0051] The present invention also discloses an efficient ridging device, such as Figure 2-Figure 5As shown, it includes several evenly installed ridging modules 2, each module is composed of a mounting seat 26, a soil-breaking plowshare 21, a spring telescopic member 22, an adjusting rod 25 and a ridger 24. The soil-breaking plowshare 21 is installed at the bottom of the adjusting rod 25, and the top of the adjusting rod 25 can be slidably installed on the mounting seat 26 to facilitate height adjustment. The ridger 24 is installed behind the soil-breaking plowshare 21, and the top front side of the ridger 24 is connected to the mounting seat 26 through a rotating shaft 23; the top rear side of the ridger 24 is connected to the rotating shaft 23 at the end of the spring telescopic member 22, and the other end of the spring telescopic member 22 is installed on the mounting seat 26. By changing the length of the spring telescopic member 22, the ridging height can be changed. The soil-breaking plowshare 21 is used for preliminary cutting of the soil, and the adjusting rod 25 allows the operating depth to be adjusted to adapt to different soil conditions; the ridger 24 is responsible for the final shaping, and flexible adjustment is achieved through the spring telescopic member 22 to ensure that the ridge shape is regular and highly consistent, or the ridge height setting is achieved by replacing the spring and changing the spring position. In this embodiment, there are 5 ridging modules 2, which are evenly distributed on the ridging equipment to ensure uniform ridge spacing, which is conducive to mechanized operation and later management. The longitudinal furrowing plowshares 3 with adjustable depth arranged on both sides of the ridging equipment can adjust the furrowing depth according to actual needs, ensure that furrows are dug while ridging, so that excess water can be quickly discharged to prevent the groundwater level from being too high and causing salinization, which also helps to take away some of the chloride ions in a dissolved state.

[0052] like Figure 2 , 3 As shown in Figure 4, the ridging equipment is also provided with a transverse ditching knife cylinder 1, which is installed behind the ridging module 2 through a landing gear 51. The landing gear 51 is provided with a hydraulic rod 5 for driving the landing gear 51 and the transverse ditching knife cylinder 1 to rise and fall, and a transmission shaft 4 for driving the transverse ditching knife cylinder 1 to rotate, so as to realize transverse excavation at certain positions, and form a "cross" ditch with the longitudinal ditch dug by the longitudinal ditching plowshare 3. During operation, the hydraulic rod 5 on the landing gear 51 drives the transverse ditching knife cylinder 1 to rise and fall, and the transmission shaft 4 drives the knife cylinder to rotate, so as to realize the integrated operation of ridging and ditching. This design can not only complete multiple operation tasks at one time, but also accurately control the ditching depth and width, ensure good drainage between ridges, and prevent the ridges from being damaged again by the transverse ditching equipment after ridging. The ridging equipment is equipped with a traction device, which is convenient for use with a tractor or other agricultural machinery. The traction device can also adjust the working speed as needed to ensure that the ridging quality is not affected, while reducing the labor intensity and improving the modernization level of agricultural production.

[0053] For the purpose of greater clarity, the invention is described in detail through the following embodiments.

[0054] Example 1

[0055] Step 1: Immediately after the tobacco leaves are picked, clean up the remaining tobacco plants in the field to ensure that no diseased residues are left in the soil to reduce the occurrence of diseases and pests.

[0056] Step 2: 20 days before the early spring crop rotation, use deep tillage equipment to till the soil layer to a depth of 30 cm, and set up drainage ditches with a depth of 15 cm, one every 5 ridges, in a tic-tac-toe pattern. Soak the soil in water once every 7 days after deep tillage, and soak it in water twice in a row, each time for 24 hours.

[0057] Step 3: Plant early spring crops of peas and broad beans, with the planting density set at 50 kg per hectare.

[0058] Step 4: After harvesting the early spring crops, use deep tillage equipment again to plow the soil to a depth of 30 cm.

[0059] Step 5: 30 days before transplanting tobacco seedlings, use ridging equipment to make ridging, and ensure that the height of the ridging reaches 30 cm. Similarly, soak in water once every 7 days, twice in a row, each time for 24 hours, to help wash away excess chloride ions.

[0060] Example 2

[0061] Step 1: Immediately after the tobacco leaves are picked, clean up the remaining tobacco plants in the field to ensure that no diseased residues are left in the soil to reduce the occurrence of diseases and pests.

[0062] Step 2: 20 days before the early spring crop rotation, use deep tillage equipment to till the soil layer to a depth of 35 cm, and set up drainage ditches with a depth of 20 cm, one every 5 ridges, in a tic-tac-toe pattern. Soak the soil in water once every 7 days after deep tillage, and soak it in water twice in a row, each time for 24 hours.

[0063] Step 3: Plant early spring crops of peas and broad beans, with the planting density set at 60 kg per hectare.

[0064] Step 4: After harvesting the early spring crops, use deep tillage equipment again to plow the soil to a depth of 35 cm.

[0065] Step 5: 30 days before transplanting tobacco seedlings, use ridging equipment to make ridging, and ensure that the height of the ridging reaches 35 cm. Similarly, soak in water once every 7 days, twice in a row, each time for 24 hours, to help wash away excess chloride ions.

[0066] Example 3

[0067] Step 1: Immediately after the tobacco leaves are picked, clean up the remaining tobacco plants in the field to ensure that no diseased residues are left in the soil to reduce the occurrence of diseases and pests.

[0068] Step 2: 20 days before the early spring crop rotation, use deep tillage equipment to till the soil layer to a depth of 40 cm, and set up drainage ditches with a depth of 15 cm, one every 5 ridges, in a tic-tac-toe pattern. Soak the soil in water once every 6 days after deep tillage, and soak it in water twice in a row, each time for 24 hours.

[0069] Step 3: Plant early spring crops of peas and broad beans, with the planting density set at 70 kg per hectare.

[0070] Step 4: After harvesting the early spring crops, use deep tillage equipment again to plow the soil to a depth of 30 cm.

[0071] Step 5: 20 days before transplanting tobacco seedlings, use ridging equipment to make ridging, and ensure that the height of the ridging reaches 40 cm. Similarly, soak in water once every 7 days, twice in a row, each time for 24 hours, to help wash away excess chloride ions.

[0072] Comparative Example 1

[0073] As a control group, only the following actions were performed:

[0074] Clean up the tobacco plants in the field immediately after the tobacco leaves are picked.

[0075] In winter, the soil layer should be plowed to a depth of 20 cm.

[0076] The ridge height is 25 cm and enough water is provided to ensure that the roots are firmly established.

[0077] The results of soil chlorine content in Example 1, Example 2, Example 3 and Comparative Example 1 were measured, and the results are shown in Table 1:

[0078] Table 1 Soil chlorine content

[0079] deal with Chlorine content Chlorine content reduction Example 1 28.5 41.36％ Example 2 27.9 42.59％ Example 3 28.3 41.77％ Comparative Example 1 48.6 --

[0080] As shown in Table 1, compared with Comparative Example 1, the soil chlorine content of Examples 1, 2, and 3 was significantly reduced by more than 41%, among which Example 2 had the largest reduction of 42.59%. This shows that the present invention effectively reduces the chlorine content of tobacco fields and promotes soil ecological balance.

[0081] The chlorine content of tobacco leaves of Example 1, Example 2, Example 3 and Comparative Example 1 was measured, and the results are shown in Table 2:

[0082] Table 2 Chlorine content of tobacco leaves

[0083] deal with Chlorine content Chlorine content reduction Example 1 0.5 58.33％ Example 2 0.7 41.67％ Example 3 0.6 50.00％ Comparative Example 1 1.2 --

[0084] As shown in Table 2, compared with Comparative Example 1, the chlorine content of tobacco leaves in Examples 1, 2, and 3 was significantly reduced by more than 41%, especially Example 1, which achieved a reduction of 58.33%. Therefore, the present invention not only effectively reduces the chlorine content in the first-cured tobacco leaves, but also improves the industrial availability of tobacco leaves, meeting market demand.

[0085] Through the analysis of the specific operations and measurement results of the above embodiments, it can be seen that the efficient cultivation method for reducing the chlorine content in tobacco fields provided by the present invention has a significant effect. It can not only effectively reduce the chlorine content in the soil and tobacco leaves, improve the tobacco growth environment, and improve the quality of tobacco leaves, but also promote the healthy and stable development of the soil ecosystem. In addition, the method can also reduce input costs, increase the economic benefits of tobacco farmers, and provide strong technical support for modern agricultural production.

[0086] Those skilled in the art will readily appreciate other embodiments of the present invention after considering the specification and practicing the present invention. This application is intended to cover any variations, uses or adaptations of the present invention that follow the general principles of the present invention and include common knowledge or customary techniques in the art that are not disclosed by the present invention. The specification and examples are to be considered exemplary only, and the true scope and spirit of the present invention are indicated by the claims above.

[0087] It should be understood that the present invention is not limited to the exact construction that has been described above and shown in the drawings and that various modifications and changes may be made without departing from the scope thereof. The scope of the present invention is limited only by the appended claims.

Claims

1. An efficient cultivation method for reducing the chlorine content in tobacco fields, characterized in that: The following steps are involved: S1: Clean up the remaining tobacco plants in the field immediately after the tobacco leaves are picked; S2: 15-20 days before the early spring crop rotation, use deep tillage equipment to deep till the soil layer ≥ 30cm, set up drainage ditches, soak in water once every 6-7 days, and soak in water for more than two times in a row; S3: Planting early spring crops such as peas and broad beans; S4: After harvesting early spring crops, deep tillage equipment is used to till the soil layer ≥ 30 cm; S5: 20-30 days before transplanting tobacco seedlings, use ridging equipment to make ridges with a height of ≥30cm. Soak in water once every 6-7 days, and soak in water twice in a row.

2. The high-efficiency cultivation method for reducing chlorine content in tobacco fields according to claim 1, characterized in that: The depth of the drainage ditch is 15-20 cm, and one is set every 5 ridges, in a "well" or "cross" shape. The soaking time of each time is 24 hours.

3. The efficient cultivation method for reducing chlorine content in tobacco fields according to claim 1, characterized in that: The planting density of the early spring crops, peas and broad beans, is 50-70 kilograms per hectare.

4. The high-efficiency cultivation method for reducing chlorine content in tobacco fields according to claim 1, characterized in that: In step S4, the pH value and chloride ion content of the tobacco field soil are first detected, and while the deep tillage equipment is used to deeply till the soil layer, lime powder is added to the soil to make the pH value of the soil range from 5.8 to 6.5, and 500 to 1000 kg of zeolite or bentonite is added per mu.

5. The efficient cultivation method for reducing chlorine content in tobacco fields according to claim 1, characterized in that: After the tobacco seedlings are transplanted, drip irrigation and micro-sprinkler irrigation are used.

6. The efficient cultivation method for reducing chlorine content in tobacco fields according to claim 1, characterized in that: The ridging equipment comprises a plurality of ridging modules (2), wherein the ridging modules (2) comprise a mounting seat (26), a soil-breaking plowshare (21), a spring telescopic member (22), an adjusting rod (25) and a ridger (24), wherein the soil-breaking plowshare (21) is mounted at the bottom of the adjusting rod (25), and the top of the adjusting rod (25) is slidably mounted on the mounting seat (26); the ridger (24) is mounted behind the soil-breaking plowshare (21), and the top front side of the ridger (24) is connected to the mounting seat (26) via a rotating shaft (23); the top rear side of the ridger (24) is connected to the rotating shaft (23) at the end of the spring telescopic member (22), and the other end of the spring telescopic member (22) is mounted on the mounting seat (26).

7. The efficient cultivation method for reducing chlorine content in tobacco fields according to claim 6, characterized in that: There are five ridging modules (2) evenly mounted on the ridging device, and longitudinal furrowing plowshares (3) with adjustable depth are also arranged on both sides of the ridging device.

8. The efficient cultivation method for reducing chlorine content in tobacco fields according to claim 6, characterized in that: The ridging equipment is also provided with a transverse furrowing knife drum (1), and the transverse furrowing knife drum (1) is installed behind the ridging module (2) through a landing gear (51), and the landing gear (51) is provided with a hydraulic rod (5) for driving the landing gear (51) and the transverse furrowing knife drum (1) to rise and fall, and a transmission shaft (4) for driving the transverse furrowing knife drum (1) to rotate.

9. The high-efficiency cultivation method for reducing chlorine content in tobacco fields according to claim 6, characterized in that: The ridging equipment is equipped with a traction device and is used in conjunction with a tractor or other agricultural machinery.

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