Method for researching influence of functional organic materials on physical and chemical properties of tobacco planting soil and flue-cured tobacco yield and quality
Through systematic experimental research and the application of functional organic materials, the problem of degradation in soil quality in tobacco fields has been solved, the growth status of soil and tobacco has been improved, the quality of tobacco leaves has been improved, and scientific guidance has been provided for tobacco field improvement.
Patent Information
- Application Number
- CN202510327689.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-03-19
- Publication Date
- 2025-05-23
AI Technical Summary
The decline in soil quality in tobacco fields has led to a decrease in the quality of tobacco leaf production in tobacco production, and there is currently a lack of systematic research methods for improving continuous tobacco fields of brown soil.
Through systematic experimental research, the target plot was selected, the soil physical and chemical properties and nutrient status were measured, the experimental communities were divided, functional organic materials of different quality were applied, and field experiments were conducted for three consecutive years. Finally, the optimal improvement plan was screened by monitoring the changes in soil and tobacco.
It effectively improves the physical properties and nutrient conditions of soil, improves the growth and yield of tobacco, and provides theoretical basis and technical ideas for tobacco field improvement.
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Figure CN120028524A_ABST
Abstract
Description
Technical Field
[0001] The present invention relates to the technical field of soil improvement and crop planting research, and more particularly to a method for studying the influence of functional organic materials on the physical and chemical properties of tobacco-growing soil and the yield and quality of tobacco after curing. Background Art
[0002] Tobacco is an important cash crop in my country, ranking first in the world in terms of area and output. It is an important source of national economy and fiscal revenue. Soil nutrition, space nutrition and tobacco plant nutrition are prerequisites for the formation of high-quality and high-yield tobacco leaves, among which soil nutrition status is a key restrictive factor affecting the growth and development of flue-cured tobacco and the quality of tobacco leaves. Under the continuous cropping mode of flue-cured tobacco, soil fertility decreases significantly, which can easily cause soil acidification, soil compaction, serious pollution, and a large accumulation of soil pathogens, resulting in a high incidence of tobacco soil-borne diseases and pests, and a significant reduction in tobacco leaf yield and quality. Therefore, the important problem currently facing tobacco production is the decline in soil quality in tobacco fields. Soil improvement in tobacco fields is an important measure to improve soil quality and ensure sustainable tobacco production.
[0003] Many discarded organic materials in farmland contain organic matter and various nutrient ions necessary for crops. Some high-carbon, high-potassium, and high-cation characteristics make them have important functions such as increasing soil carbon pools, improving nutrient utilization, and balancing soil acidity and alkalinity. Organic materials are rich in organic matter and mineral elements. After being put into use, they can promote the accumulation of soil organic matter, improve soil pore structure and connectivity, increase field water holding capacity and total porosity, and reduce soil bulk density. Studies by Fan Qingfeng et al. and Jiang Yong et al. also showed that adding organic materials to soil can reduce soil bulk density, increase soil organic matter content and cation exchange capacity, and have a significant effect on improving soil pH and buffering performance. Studies by Hu Yingjie et al. also showed that functional organic materials can improve soil properties and soil acidity. Studies have shown that the application of organic materials has a significant improvement on soil compaction, soil acidification, and other problems, and has a promoting effect on increasing soil nutrient content and soil water and fertilizer retention. Studies by Yang Kai et al. have shown that the application of organic materials can increase the content of available nutrients in the soil, and the content of alkaline nitrogen, available potassium, and available phosphorus has increased significantly. Soil organic matter can increase soil cohesion and thus improve the stability of soil aggregates. The application of organic materials can increase soil organic matter content and increase crop yield, thereby reducing soil bulk density and increasing porosity. Functional organic fertilizers have stable fertilizer supply and lasting fertilizer effect. When applied with appropriate fertilizers, they can not only promote the nutritional needs of flue-cured tobacco for macronutrients, but also meet the balanced absorption of trace elements by tobacco plants, making the nutrients more coordinated. Previous studies have shown that the application of organic materials can increase the dry matter mass of tobacco leaves and the yield and quality of flue-cured tobacco. However, there are few studies on the improvement of continuous cropping tobacco fields on brown soil, and there are even fewer studies on the use of different organic materials and different ratios of peanut shell powder and oyster shell powder to improve tobacco field soil. Therefore, how to provide a systematic research method to study the improvement of soil and tobacco by different organic matter has important guiding significance for crop planting. Summary of the invention
[0004] In view of this, the present invention provides a research method, which can screen out the optimal improvement plan through systematic experimental research, and provide guidance for tobacco field soil improvement and tobacco quality improvement.
[0005] To achieve the above object, the present invention adopts the following technical solution:
[0006] A method for studying the effects of functional organic materials on the physical and chemical properties of tobacco-growing soil and the quality of tobacco yield after curing, comprising the following steps:
[0007] S1. Select the target plot, measure the soil physical and chemical properties and nutrient status, and then divide the target plot into multiple experimental plots;
[0008] S2. Apply different functional organic materials of equal mass in different experimental plots, turn them into the soil with rotary tillage, and then carry out normal ridging and transplanting tobacco planting;
[0009] S3. Step S2 is repeated for three consecutive years. When the flue-cured tobacco is harvested in the third year, the soil of each plot is taken to measure the physical and chemical properties and nutrient status. At the same time, tobacco plants from different plots are collected to measure the agronomic shape, dry matter accumulation, chemical composition and yield.
[0010] Preferably, the soil physical and chemical properties and nutrient status described in steps S1 and S3 include soil bulk density and field water holding capacity, soil aggregates, soil pH, electrical conductivity, organic carbon content, total nitrogen content, available potassium content, and available phosphorus content.
[0011] Furthermore, soil bulk density and field water holding capacity were determined by the ring knife method, soil aggregates were determined by the wet sieving method, soil pH was determined by a water-soil ratio of 1:2.5, electrical conductivity was determined by a water-soil ratio of 1:5, organic carbon content was determined by potassium dichromate heating titration method, total nitrogen content was determined by semi-micro Kjeldahl method, available potassium content was determined by ammonium acetate extraction-flame photometry, and available phosphorus content was determined by molybdenum antimony countercolorimetry.
[0012] Preferably, in step S1, five plots are divided, including a conventionally treated blank control group and four experimental groups.
[0013] Furthermore, the different functional organic materials in step S2 include four types, corresponding to four experimental groups, specifically:
[0014] Straw particles, nano-carbon-based fertilizer, a composition with a mass ratio of peanut shell powder to oyster shell powder = 12:1, and a composition with a mass ratio of peanut shell powder to oyster shell powder = 3:1.
[0015] Preferably, in step S3, at least 3 tobacco plants are taken from each experimental plot.
[0016] Preferably, the agronomic traits in step S3 include plant height, stem girth, number of effective leaves, lower leaf length and leaf width, middle leaf length and leaf width, and upper leaf length and leaf width.
[0017] Preferably, the dry matter accumulation amount in step S3 is specifically determined by the following method:
[0018] The roots, stems and leaves of the flue-cured tobacco plants were sterilized at 105°C for 30 min, then dried at 80°C to constant weight, and the mass was weighed and recorded.
[0019] Preferably, the chemical components in step S3 include total alkaloids, total nitrogen, total sugars, reducing sugars, potassium, and chlorine content.
[0020] It can be seen from the above technical scheme that, compared with the prior art, the present invention discloses a method for studying the effects of functional organic materials on the physical and chemical properties of tobacco-growing soil and the quality of tobacco yield after curing, which has the following beneficial effects:
[0021] The present invention arranges different organic materials and proportions to improve brown earth tobacco-growing soil, and comprehensively screens out the application methods of functional organic materials that can alleviate different obstacle factors for tobacco planting by monitoring the soil physical properties, nutrient status, tobacco plant growth status, and tobacco yield and output value after flue-curing, thereby providing a theoretical basis and technical ideas for reasonable tobacco field improvement measures. BRIEF DESCRIPTION OF THE DRAWINGS
[0022] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the provided drawings without paying creative work.
[0023] Figure 1 The effects of different organic materials on soil pH;
[0024] Figure 2 The effects of different organic materials on soil electrical conductivity;
[0025] Figure 3 The effects of different organic materials on soil available nutrients;
[0026] Figure 4 The effects of different organic materials on the total nutrients of soil;
[0027] Figure 5 The effect of different organic materials on the chemical composition of flue-cured tobacco. DETAILED DESCRIPTION
[0028] The technical solution of the present invention will be clearly and completely described below in conjunction with the embodiments of the present invention. Obviously, the described embodiments are only 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.
[0029] Example 1
[0030] Overview of the test area: The test was conducted in Yishui County, Linyi City, Shandong Province (118°63′E, 35°70′N) in April 2020. It has a temperate monsoon climate, with an average annual sunshine of 2414.7 hours, a temperature of 12.3℃, a precipitation of about 800mm, and a frost-free period of 191.7 days. The flue-cured tobacco variety tested in the test area is Zhongyan Special Fragrance 301, which is planted in ridges.
[0031] The test soil was brown soil. Before the test, the soil nutrient status was: pH 5.05, bulk density 1.39 g cm-3 , total nitrogen 0.63g·kg -1 , organic carbon 6.17 g kg -1 , fast-acting potassium 122.32 g·kg -1 , ammonium nitrogen 4.05 mg kg -1 , nitrate nitrogen 18.22 mg kg -1 .
[0032] 1. Experimental Design
[0033] A total of 5 treatments were set up in the experiment: ① conventional treatment as blank control (CK); ② straw pellets (T1); ③ nanocarbon-based fertilizer (T2); ④ peanut shell powder: oyster shell powder = 12:1 (T3) (mass ratio); ⑤ peanut shell powder: oyster shell powder = 3:1 (T4) (mass ratio). Each treatment was repeated 3 times, with a randomized block design. Before the experimental layout, the organic material was evenly spread on the surface of each plot, turned into the soil with rotary tillage, and then normal ridge formation and transplanting were carried out. Organic materials were returned to the field for three consecutive years, and soil samples were taken for determination when the flue-cured tobacco was harvested in October 2023. At the same time, the chemical composition and yield of the tobacco leaves were determined.
[0034] 2. Sample collection and determination
[0035] In October 2023, when the flue-cured tobacco matured, the soil from the 0-20cm soil layer of each plot was collected with a circular knife to determine the soil bulk density; the soil from the plough layer was collected by the five-point sampling method, mixed and brought back to the laboratory for air drying and grinding, which was used to determine the content of soil organic carbon, total nitrogen, available potassium, effective phosphorus, alkaline nitrogen, etc. After the flue-cured tobacco reached maturity, 3 tobacco plants were taken from each plot, and the roots, stems, and leaves were fixed at 105℃ for 30min, and then dried at 80℃ to constant weight, and the quality was recorded. After the baking was completed, the tobacco leaves were naturally moistened in the curing room for 3 days, and the tobacco leaves were graded strictly according to the GB / T 2635-1992 flue-cured tobacco grading standard; the C3F grade was selected for sampling.
[0036] Soil index determination: Bulk density and field water holding capacity were determined by the ring knife method; soil aggregates were determined by the wet sieving method. Soil pH was determined by a water-soil ratio of 1:2.5, and conductivity was determined by a water-soil ratio of 1:5. Organic carbon content was determined by potassium dichromate heating titration; total nitrogen content was determined by semi-micro Kjeldahl nitrogen determination; available potassium content was determined by ammonium acetate extraction-flame photometry; effective phosphorus content was determined by molybdenum antimony anticolorimetry.
[0037] Determination of chemical components of tobacco leaves: A continuous flow analyzer was used to determine the total alkaloids, total nitrogen, total sugar, reducing sugar, potassium and chlorine contents of tobacco leaf samples.
[0038] The experimental data were sorted and analyzed using Excel 2016. SPSS26.0 was used for one-way analysis of variance and LSD method for statistical analysis, with the significance level set at α=0.05, and Origin 2021 was used for drawing.
[0039] 3. Measurement results
[0040] 3.1 Effects of different organic materials on soil physical and chemical properties
[0041] 3.1.1 Effects of different organic materials on soil physical properties
[0042] Table 1 Effects of different organic materials on soil physical properties
[0043] deal with Maximum field water holding capacity (%) <![CDATA[Unit weight (g·cm -3 )]]> CK 11.42 1.35 T1 12.47 1.38 T2 8.80 1.42 T3 11.88 1.24 T4 12.59 1.32
[0044] As shown in Table 1, the maximum field water holding capacity of T1 and T4 treatments was higher than that of CK treatment, and the maximum field water holding capacity of T4 treatment was higher than that of T1 treatment. T2 treatment significantly reduced the maximum field water holding capacity. T3 and T4 treatments reduced soil bulk density by 8.30% and 2.16% respectively.
[0045] The distribution of soil aggregates under different organic material treatments is shown in Table 2.
[0046] Table 2 Effects of different organic materials on soil aggregate distribution
[0047]
[0048]
[0049] Except for the T4 treatment, the content of 2-5 mm aggregates in the other treatments was the lowest, at 4.35%, 3.98%, 6.42% and 8.09% respectively; the content of >5 mm aggregates in the T4 treatment was the lowest, at 0.42%. The R0.25 of different organic materials was T3>T2>T1>CK>T4, and the T2 and T3 treatments were higher than the T1 and CK treatments. The effect of different organic materials on the mean mass diameter (MWD) of aggregates was the highest in the T3 treatment, followed by the T2 treatment. The T3 and T2 treatments increased by 64.36%-146.01% and 37.98%-106.53% respectively compared with the other treatments. The above results showed that the T2 and T3 treatments increased the R 0.25 and MWD, which is beneficial to improving the soil structure of farmland.
[0050] 3.1.2 Effects of different organic material treatments on soil pH
[0051] like Figure 1As shown. Different organic materials increased soil pH to a certain extent. Compared with the CK treatment, the T1, T3 and T4 treatments significantly increased soil pH by 1.02, 0.78 and 2.31 units, respectively; there was no significant difference in soil pH between the T2 treatment and CK. In summary, the increase of organic materials, especially the T4 treatment, significantly increased soil pH.
[0052] 3.1.3 Effects of different organic materials on soil electrical conductivity
[0053] Depend on Figure 2 It can be seen that the conductivity of different organic materials is 160.85~528.81μs·cm -1 , the average value is 357.22μs·cm -1 Compared with the CK treatment, the T1, T2 and T4 treatments significantly increased soil electrical conductivity by 41.02%, 78.80% and 29.71%, respectively; the T3 treatment significantly decreased soil electrical conductivity by 45.61%.
[0054] 3.1.4 Effects of different organic materials on soil available nutrients
[0055] like Figure 3 As shown. The soil alkaline nitrogen content was T3>T1>T4>T2>CK from high to low. Compared with the CK treatment, all treatments significantly increased the soil alkaline nitrogen content, with an increase of 119.57% to 469.57%. The available potassium (AK) content was T2>T1>T4>CK>T3 from high to low. Compared with the CK treatment, the T1, T3 and T4 treatments increased significantly, with increases of 78.34%, 277.04% and 31.21%, respectively. The T3 treatment significantly reduced the soil AK content, with a decrease of 33.11%. Compared with the T3 treatment, the T4 treatment significantly increased the soil available potassium content, with an increase of 96.15%. The order of available phosphorus (AP) content from high to low was T2>T4>T1>T3>CK. Compared with CK treatment, T1, T2, T3 and T4 treatments all significantly increased soil AP content, with increases of 53.52%, 152.42%, 47.46% and 72.61%, respectively. T4 increased soil available phosphorus content compared with T3 treatment, but there was no significant difference.
[0056] 3.1.5 Effects of different organic materials on soil total nutrients
[0057] like Figure 4As shown in the figure, it can be seen that the soil organic carbon content decreases in the order of T1>T3>CK>T2>T4 from high to low. Compared with the CK treatment, the T1 treatment significantly increased the soil organic carbon content, with an increase of 69.75%, and there was no significant difference between the remaining treatments and the CK control. The soil total nitrogen content decreased in the order of T1>T3>T2>CK>T4 from high to low. Compared with the CK treatment, the T1, T2, and T3 treatments all significantly increased the soil total nitrogen content, which were 0.71, 0.31, and 0.38 times that of CK, respectively.
[0058] 3.2 Effects of Different Organic Materials on Agronomic Traits of Flue-cured Tobacco
[0059] As shown in Table 3.
[0060] Table 3 Effects of Different Organic Materials on Agronomic Traits of Flue-cured Tobacco
[0061] deal with CK T1 T2 T3 T4 Plant height (cm) 106.33±1.15c 120.67±0.58a 112.00±1.00b 125.00±3.61a 125.33±4.04a Stem circumference (cm) 9.67±0.58b 10.00±0.11b 9.70±0.10b 11.35±0.23a 9.43±0.25b Number of effective leaves 16.33±0.58c 19.33±0.58a 18.33±0.58ab 18.08±1.26ab 16.67±1.15bc Lower leaf length (cm) 58.30±1.53b 65.90±0.36a 65.07±0.49a 63.68±3.06a 65.37±3.25a Lower leaf width (cm) 35.33±0.58bc 30.87±0.57d 36.67±1.16ab 33.95±1.36c 38.27±1.27a Middle leaf length (cm) 59.50±1.50c 70.07±0.40b 68.30±1.06b 73.20±1.14a 70.97±2.50ab Middle leaf width (cm) 29.00±1.00c 30.77±1.50bc 33.40±1.57a 31.97±0.98ab 33.43±1.18a Upper leaf length (cm) 50.67±0.58b 48.63±0.51b 48.57±0.55b 65.32±1.81a 41.33±1.44c Upper leaf width (cm) 15.67±0.58b 16.87±0.35ab 18.23±0.74a 18.80±2.57a 15.07±0.61b
[0062] As can be seen from Table 3, different organic materials had significant effects on the agronomic traits of flue-cured tobacco (P<0.05). The T4 treatment had greater effects on the plant height, lower leaf length, lower leaf width, middle leaf length, and middle leaf width of flue-cured tobacco, and significantly increased them by 17.87%, 12.13%, 8.32%, 17.28%, and 15.28% respectively compared with CK; followed by the T2 treatment, which had greater effects on the plant height, effective leaf number, lower leaf length, middle leaf length, width, and upper leaf width of flue-cured tobacco, and significantly increased them by 5.33%, 12.25%, 11.61%, 14.97%, 15.17%, and 16.34% respectively compared with the CK treatment. Compared with the CK control treatment, the T1 treatment significantly reduced the lower leaf width, with a decrease of 12.62%.
[0063] 3.3 Effects of Different Organic Materials on Dry Matter Accumulation of Flue-cured Tobacco
[0064] As shown in Table 4.
[0065] Table 4 Effects of Different Organic Materials on Dry Matter Accumulation of Flue-cured Tobacco
[0066] deal with Root (g) Stem(g) Leaves(g) CK 68.73±3.11b 55.20±1.64c 132.55±2.86b T1 58.84±3.20c 74.25±3.42b 121.95±9.67bc T2 29.50±1.86d 60.74±2.70c 131.92±0.50b T3 63.65±0.90bc 84.34±1.41a 168.85±3.34a T4 83.95±2.79a 61.72±2.06c 115.60±0.42c
[0067] As can be seen from Table 4, different organic materials had significant effects on the dry matter accumulation of flue-cured tobacco. Compared with the CK treatment, the T1 and T2 treatments significantly reduced the root dry matter accumulation, with decreases of 14.39% and 57.08% respectively; while the T4 treatment significantly increased the root dry matter accumulation, with an increase of 22.14%; the T1 and T3 treatments significantly increased the stem dry matter accumulation, with increases of 34.51% and 52.79% respectively; the T3 treatment significantly increased the leaf dry matter accumulation, with an increase of 27.39%, and the T4 treatment significantly reduced the leaf dry matter accumulation, with a decrease of 12.79%.
[0068] 3.4 Effects of different organic materials on flue-cured tobacco yield and quality
[0069] 3.4.1 Effects of different tillage practices on the chemical composition of flue-cured tobacco
[0070] like Figure 5 As shown, from Figure 5 It can be seen that compared with CK, T3 and T4 treatments significantly increased the total sugar content of flue-cured tobacco leaves, with increases of 8.53% and 7.28%, respectively. Compared with CK, T2, T3 and T4 treatments significantly reduced the total nitrogen and total alkaloid contents, with the decrease from high to low being T2>T3>T4, and the decreases were between 12.76% and 27.74% and 21.75% and 37.65%, respectively. Compared with CK, the trends of potassium oxide and chlorine content in each treatment were basically the same, and T1, T3 and T4 treatments all increased the potassium oxide and chlorine contents of flue-cured tobacco leaves, with a significant effect on potassium oxide content.
[0071] 3.4.2 Effects of different organic materials on flue-cured tobacco yield and output value
[0072] As shown in Table 5.
[0073] Table 5 Effects of different organic materials on flue-cured tobacco yield and main economic traits
[0074]
[0075] As can be seen from Table 5, the proportion of medium and high-quality tobacco in the T2 treatment was higher than that in the control treatment, with an increase of 0.65%. Compared with the CK treatment, the T1 and T2 treatments increased the yield and output value of flue-cured tobacco leaves, with increases of 11.69%, 2.51%, 10.39% and 5.49% respectively; the single leaf weight of the T4 treatment was higher than that of the CK control treatment, with an increase of 9.60%, and the yield and output value of flue-cured tobacco leaves were higher than those of the CK treatment, with increases of 12.20% and 11.78% respectively.
[0076] The above analysis shows that the application of functional organic materials can effectively improve soil physical properties and soil nutrient conditions, increase soil pH, enhance microbial activity, and promote tobacco plant nutrient absorption and growth, thereby increasing tobacco biomass accumulation and improving tobacco quality, which can bring higher economic benefits to tobacco farmers. However, the effects of different functional organic materials vary. Among them, according to the results of this study, the peanut shell powder: oyster shell powder = 3:1 (T4) treatment can effectively alleviate soil acidification, improve soil fertility, and increase flue-cured tobacco yield and output value compared with other treatments. It can be used as a technical measure for tobacco field acidification control and quality improvement and efficiency enhancement, and can be promoted in soil acidification production areas in my country.
[0077] The various embodiments in this specification are described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same or similar parts between the various embodiments can be referenced to each other.
[0078] The above description of the disclosed embodiments enables one skilled in the art to implement or use the present invention. Various modifications to these embodiments will be apparent to one skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to the embodiments shown herein, but rather to the widest scope consistent with the principles and novel features disclosed herein.
Claims
1. A method for studying the effects of functional organic materials on the physical and chemical properties of tobacco-growing soil and the quality of tobacco yield after curing, characterized in that: The following steps are involved: S1. Select the target plot, measure the soil physical and chemical properties and nutrient status, and then divide the target plot into multiple experimental plots; S2. Apply different functional organic materials of equal mass in different experimental plots, turn them into the soil with rotary tillage, and then carry out normal ridging and transplanting tobacco planting; S3. Step S2 is repeated for three consecutive years. When the flue-cured tobacco is harvested in the third year, the soil of each plot is taken to measure the physical and chemical properties and nutrient status. At the same time, tobacco plants from different plots are collected to measure the agronomic shape, dry matter accumulation, chemical composition and yield.
2. The method for studying the effects of functional organic materials on the physical and chemical properties of tobacco-growing soil and the quality of tobacco yield after curing according to claim 1, characterized in that: The soil physical and chemical properties and nutrient status described in steps S1 and S3 include soil bulk density and field water holding capacity, soil aggregates, soil pH, electrical conductivity, organic carbon content, total nitrogen content, available potassium content, and available phosphorus content.
3. The method for studying the effects of functional organic materials on the physical and chemical properties of tobacco-growing soil and the quality of tobacco yield after curing according to claim 2, characterized in that: Soil bulk density and field water holding capacity were determined by the ring knife method, soil aggregates were determined by the wet screening method, soil pH was determined by a water-soil ratio of 1:2.5, electrical conductivity was determined by a water-soil ratio of 1:5, organic carbon content was determined by potassium dichromate heating titration method, total nitrogen content was determined by semi-micro Kjeldahl method, available potassium content was determined by ammonium acetate extraction-flame photometry, and available phosphorus content was determined by molybdenum antimony countercolorimetry.
4. The method for studying the effects of functional organic materials on the physical and chemical properties of tobacco-growing soil and the quality of tobacco yield after curing according to claim 1, characterized in that: In step S1, the cells were divided into five groups, including a blank control group with conventional treatment and four experimental groups.
5. The method for studying the effects of functional organic materials on the physical and chemical properties of tobacco-growing soil and the quality of tobacco yield after curing according to claim 4, characterized in that: The different functional organic materials in step S2 include four types, corresponding to four experimental groups, specifically: Straw particles, nano-carbon-based fertilizer, a composition with a mass ratio of peanut shell powder to oyster shell powder = 12:1, and a composition with a mass ratio of peanut shell powder to oyster shell powder = 3:
1.
6. The method for studying the effects of functional organic materials on the physical and chemical properties of tobacco-growing soil and the quality of tobacco yield after curing according to claim 1, characterized in that: In step S3, at least 3 tobacco plants are taken from each experimental plot.
7. The method for studying the effects of functional organic materials on the physical and chemical properties of tobacco-growing soil and the quality of tobacco yield after curing according to claim 1, characterized in that: The agronomic traits in step S3 include plant height, stem girth, number of effective leaves, lower leaf length and leaf width, middle leaf length and leaf width, and upper leaf length and leaf width.
8. The method for studying the effects of functional organic materials on the physical and chemical properties of tobacco-growing soil and the quality of tobacco yield after curing according to claim 1, characterized in that: The specific determination of the dry matter accumulation amount in step S3 is carried out by the following method: The roots, stems and leaves of the flue-cured tobacco plants were sterilized at 105°C for 30 min, then dried at 80°C to constant weight, and the mass was weighed and recorded.
9. The method for studying the effects of functional organic materials on the physical and chemical properties of tobacco-growing soil and the quality of tobacco yield after curing according to claim 1, characterized in that: The chemical components in step S3 include total plant alkaloids, total nitrogen, total sugar, reducing sugar, potassium, and chlorine content.