Foliar fertilizer for improving combustibility of cigar tobacco leaves and fertilizing method

Abstract

The invention relates to a foliar fertilizer for improving combustibility of cigar tobacco leaves and a fertilizing method. The foliar fertilizer comprises the following components in percentage by mass: 0.3%-0.7% of an amino acid magnesium fertilizer, 0.03%-0.07% of seaweed essence, 0.04%-0.07% of a boron fertilizer, 0.02%-0.07% of a zinc fertilizer, 0.02%-0.04% of a molybdenum fertilizer and the balance of water. The foliar fertilizer capable of improving the combustibility of the cigar tobacco leaves is formed by taking the magnesium element as a main component and adding the boron element, the zinc element, the molybdenum element and the natural active substance seaweed essence, and under the matching action of the substances, the combustibility of the cigar tobacco leaves is effectively improved, and the first-class tobacco rate is increased. Therefore, the foliar fertilizer and the fertilizing method provided by the invention can effectively improve the comprehensive combustion performance of the cigar tobacco leaves, promote the sufficient combustion of the tobacco leaves, and also have the effect of increasing the output value.

Description

Technical Field

[0001] The invention relates to the technical field of fertilizers, and in particular to a foliar fertilizer for improving the combustibility of cigar tobacco leaves and a fertilization method. Background Art

[0002] Cigar is a typical leaf-based cash crop and also a special tobacco product. It is deeply loved by smokers for its richer aroma and stronger strength. Cigar sales have been rising year by year, but there is currently a shortage of high-quality raw materials. The main problem is that some cigars have problems such as black ash, incomplete combustion, and poor combustion during the combustion process. Therefore, how to increase the output and quality of cigars and improve market competitiveness has become a top priority for improving the efficiency of cigar cultivation.

[0003] At present, in terms of improving the combustibility of tobacco leaves, some studies have improved the quality or combustibility of cigars by adding substances to the tobacco leaves after harvest (such as spraying plant extracts, pectinase, α-amylase, glycerol before cigar tobacco fermentation) to change the content of chemical substances inside the tobacco leaves. Although the above methods have certain effects, they will destroy the flavor of the cigar tobacco leaves themselves to a certain extent, and are time-consuming and labor-intensive. Compared with the method of adding substances after harvesting to improve combustibility, it is a green, safe and convenient method to improve the combustibility of tobacco leaves by using certain management techniques in the field production process to regulate the content of chemical substances in the tobacco leaves. Studies have shown that the magnesium content of tobacco leaves is positively correlated with combustibility, and has a good effect on aroma quality, aftertaste, miscellaneous gas, and irritation. In the research on improving the combustibility of cigar tobacco leaves in actual field production, some scholars applied calcium, magnesium and sulfur fertilizers as base fertilizers to examine the effects of calcium, magnesium and sulfur on the quality and combustibility of cigar tobacco leaves. They found that the application of magnesium can effectively improve the proportion of chemical substances in tobacco leaves and has the best effect on improving the combustibility of tobacco leaves, while sulfur has a significant negative impact on the combustibility of tobacco leaves.

[0004] Therefore, one of the methods to regulate the content of chemical substances in tobacco leaves is to apply fertilizers. However, the nutrient content of soil varies in different regions. Although the soil magnesium content in most parts of China is currently deficient, direct application of magnesium fertilizer without conducting a test on the dosage of magnesium fertilizer may have a negative impact, resulting in reduced tobacco quality and yield, and affecting local farmers' income and government tax revenue. Cigars are leaf-based cash crops, and the harvested objects are the leaves. The most direct effect on the leaves is foliar fertilizer, and the nutrient content of foliar fertilizer is low. When the nutrients are not excessive, it rarely causes crop quality reduction and yield reduction. Therefore, a foliar fertilizer that can improve the combustibility of cigar tobacco leaves is urgently needed in the current field production of cigar tobacco leaves. Summary of the invention

[0005] The purpose of the present invention is to overcome the above technical deficiencies, provide a foliar fertilizer and a fertilization method for improving the combustibility of cigar tobacco leaves, and solve the technical problem of poor combustibility of tobacco leaves in the prior art.

[0006] In order to achieve the above technical purpose, the technical solution provided by the present invention is: In a first aspect, the present invention provides a foliar fertilizer for improving the combustibility of cigar tobacco leaves, the foliar fertilizer comprising the following ingredients in percentage by mass: 0.3% to 0.7% of amino acid magnesium fertilizer, 0.03% to 0.07% of seaweed essence, 0.04% to 0.07% of boron fertilizer, 0.02% to 0.07% of zinc fertilizer, 0.02% to 0.04% of molybdenum fertilizer and the remainder of water.

[0007] In a second aspect, the present invention provides a method for applying the foliar fertilizer for improving the combustibility of cigar tobacco leaves, comprising the following steps: spraying the foliar fertilizer on leaves of cigar tobacco plants, wherein the spraying time is: a first spraying is performed during the clustering period of the cigar tobacco plants, and a second spraying is performed during the vigorous growth period; wherein the clustering period of the cigar tobacco plants is 28 to 33 days after transplantation, and the vigorous growth period is 45 to 55 days after transplantation.

[0008] Compared with the prior art, the beneficial effects of the present invention include: The foliar fertilizer of the present invention is a foliar fertilizer that improves the combustibility of cigar tobacco leaves by taking magnesium as the main component and adding boron, zinc, molybdenum and natural active substance seaweed extract. The magnesium element in amino acid magnesium is an important component of chlorophyll in chloroplasts and is also an important signal substance (Mg 2+ ), spraying the magnesium provided can effectively promote the photosynthetic efficiency of plants, the assimilation of photosynthetic carbon, the transportation and utilization of photosynthetic products, and is conducive to the transportation of materials between the aboveground and underground parts; spraying boron fertilizer, zinc fertilizer and molybdenum fertilizer can provide exogenous zinc, boron and molybdenum for the leaves, which can promote the activation of carbonic anhydrase and the synthesis of chlorophyll and auxin in plants, improve the photosynthetic performance of tobacco, the nitrogen accumulation rate, and enhance the aroma of tobacco leaves, and reduce the formation of gray smoke and variegated smoke; seaweed essence is a natural active substance that can promote the penetration of cigar tobacco leaves to foliar fertilizers, prolong the attachment time, promote the absorption of nutrients in foliar fertilizers by tobacco leaves, improve the metabolic level of tobacco plants, and also improve the stress resistance of tobacco plants, and reduce the risk of burning leaves of foliar fertilizers; under the coordinated action of the above substances, the combustibility of tobacco leaves is effectively improved, and the rate of high-quality tobacco is increased. Therefore, the foliar fertilizer and fertilization method provided by the present invention can effectively improve the comprehensive combustion performance of cigar tobacco leaves, promote the full combustion of tobacco leaves, and have the effect of increasing output value. BRIEF DESCRIPTION OF THE DRAWINGS

[0009] Figure 1 TG curves (left figure) and DTG curves (right figure) of cigar tobacco leaves treated in the present invention; Figure 2 It is a partial enlarged view of the TG curve (left side) and the DTG curve (right side) of each treatment of cigar tobacco leaves of the present invention; Figure 3 This is a schematic diagram of determining the combustion start temperature and burnout temperature of tobacco leaves by the TG-DTG joint definition method. DETAILED DESCRIPTION

[0010] In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0011] The invention provides a foliar fertilizer for improving the combustibility of cigar tobacco leaves and a fertilization method. The foliar fertilizer has good solubility, reasonable formula, high fertilizer utilization rate and simple application method. By promoting the absorption of magnesium and other trace elements by tobacco leaves, it is helpful to regulate the nutritional balance of plants, promote the photosynthesis of leaves, and regulate the content of chemical components in tobacco leaves, thereby improving the yield and quality of cigar tobacco leaves and improving the combustibility of tobacco leaves. Moreover, the addition of seaweed essence, a natural active substance, can increase the amount and time of the foliar fertilizer adhering to the leaf surface, promote the foliar fertilizer to penetrate the leaf biofilm and be absorbed on the leaf surface, enhance the fertilizer effect, and enhance the stress resistance of tobacco plants.

[0012] In a first aspect, the present invention provides a foliar fertilizer for improving the combustibility of cigar tobacco leaves, comprising the following ingredients in percentage by mass: 0.3% to 0.7% of amino acid magnesium fertilizer, 0.03% to 0.07% of seaweed extract, 0.04% to 0.07% of boron fertilizer, 0.02% to 0.07% of zinc fertilizer, 0.02% to 0.04% of molybdenum fertilizer and the remainder of water.

[0013] Preferably, the amino acid magnesium fertilizer contains more than 60% amino acid magnesium, and the remainder is amino acids.

[0014] More preferably, the amino acid types include amino acids in common amino acid chelate fertilizers such as glycine, leucine, aspartic acid, glutamic acid or lysine.

[0015] The amino acid magnesium fertilizer of the present invention is composed of amino acid magnesium and amino acids, and the content of amino acid magnesium in the amino acid magnesium fertilizer is more than 60%, and the balance is amino acids. The present invention provides amino acids and amino acid magnesium through amino acid magnesium fertilizer products, and amino acid magnesium is the main component; the amino acid magnesium selected in the present invention is a chelated magnesium, which is an important component of chlorophyll in tobacco chloroplasts, and is also an important signal substance (Mg 2+), which can effectively promote the photosynthetic efficiency of plants, the assimilation of photosynthetic carbon, the transportation and utilization of photosynthetic products, and facilitate the transport of materials between the aboveground and underground parts. Spraying exogenous magnesium can improve the circadian rhythm of tobacco plants, increase photosynthesis, promote the transport of carbohydrates between the aboveground and underground parts, regulate the content of chemical substances in the leaves, and improve quality.

[0016] The present invention has no special requirements for the manufacturer of the above-mentioned amino acid magnesium fertilizer, and products produced by manufacturers well known to those skilled in the art can be used.

[0017] Preferably, the boron fertilizer includes boric acid or sodium borate. The boron provided to the leaves by boric acid or sodium borate can promote the growth of tobacco plants and the accumulation of dry matter, coordinate the chemical composition of tobacco leaves, and improve the flavor of tobacco leaves.

[0018] Preferably, the zinc fertilizer includes zinc sulfate. Zinc sulfate can provide exogenous zinc to leaves, promote the activation of carbonic anhydrase and the synthesis of chlorophyll and auxin, improve tobacco photosynthetic performance, promote the growth of stems and leaves, has good water solubility, and has no adverse effects on tobacco.

[0019] Preferably, the molybdenum fertilizer includes ammonium molybdate or sodium molybdate. Ammonium molybdate or sodium molybdate can promote the nitrogen accumulation rate and photosynthesis rate of tobacco plants, enhance the aroma of tobacco leaves, and reduce the formation of gray smoke and variegated smoke.

[0020] The sources of the boron fertilizer, zinc fertilizer and molybdenum fertilizer are not particularly limited, and conventional commercially available products may be used.

[0021] The source of the seaweed extract in the foliar fertilizer is not particularly limited, and conventional commercial products can be used. In the present invention, the addition of seaweed extract can reduce the surface tension of water, prolong the attachment time of the foliar fertilizer, promote the absorption of nutrients in the foliar fertilizer by tobacco leaves, improve the metabolic level of tobacco plants, and also improve the stress resistance of tobacco plants, reducing the risk of leaf burn caused by foliar fertilizer.

[0022] The source of water in the foliar fertilizer is not particularly limited, and is preferably farmland water that meets national standards.

[0023] Preferably, the composition comprises the following components in mass percentage: 0.3% to 0.5% of amino acid magnesium, 0% to 0.2% of amino acid, 0.04% to 0.06% of seaweed essence, 0.05% to 0.06% of boron fertilizer, 0.03% to 0.07% of zinc fertilizer, 0.02% to 0.04% of molybdenum fertilizer and the balance of water.

[0024] Preferably, the composition comprises the following components in mass percentage: 0.3% to 0.35% of amino acid magnesium, 0.01% to 0.2% of amino acid, 0.04% to 0.06% of seaweed essence, 0.05% to 0.06% of boron fertilizer, 0.03% to 0.07% of zinc fertilizer, 0.02% to 0.04% of molybdenum fertilizer and the balance of water.

[0025] Preferably, the composition comprises the following components in mass percentage: 0.325% of amino acid magnesium, 0.175% of amino acid, 0.06% of seaweed essence, 0.06% of boron fertilizer, 0.06% of zinc fertilizer, 0.03% of molybdenum fertilizer and the balance of water.

[0026] In a second aspect, the present invention provides a method for applying foliar fertilizer, comprising the following steps: The above-mentioned foliar fertilizer is sprayed on the leaves of cigar plants. The spraying time is: the first spraying is carried out during the clustering stage of the cigar plants, and the second spraying is carried out during the vigorous growth stage; wherein, the clustering stage of the cigar plants is 28 to 33 days after transplanting, and the vigorous growth stage is 45 to 55 days after transplanting.

[0027] In the present invention, the amount of the foliar fertilizer is calculated according to the water consumption for spraying the foliar fertilizer and the mass fraction of the amino acid magnesium fertilizer, seaweed extract, boric acid, zinc sulfate and ammonium molybdate contained in the foliar fertilizer, and is directly added to the water after accurate weighing without any sequence requirement. The fertilizer can be applied after being stirred evenly.

[0028] Preferably, the foliar fertilizer is sprayed on a sunny day, and the time of spraying is before 9 am or after 4 pm. More preferably, it is after sunrise to before 9 am or after 4 pm to before sunset. The time of spraying can be appropriately adjusted according to the actual situation of sunrise and sunset in different regions. In the present invention, the selection of the spraying time is to avoid the cigar leaves being in a dormant, stomata closed state around noon and too early or too late, which affects the absorption of the foliar fertilizer.

[0029] Preferably, the foliar fertilizer is sprayed on the front and / or back sides of the leaves of the cigar tobacco plants.

[0030] Preferably, the amount of foliar fertilizer sprayed is: 40 mL to 60 mL per plant during the clustering stage, and 80 mL to 100 mL per plant during the vigorous growth stage.

[0031] In the present invention, the time interval between spraying in the clustering stage and the vigorous growth stage is relatively long. This spraying method is selected because tobacco begins to enter a rapid growth period after entering the clustering stage. Spraying foliar fertilizer in this period can replenish nutrition in time and promote its better growth and development. The vigorous growth period of 45-55 days after transplanting and survival is immediately before the budding stage and the topping stage of the tobacco plant. At this time, the leaves of the whole plant are vigorous and are before the leaves stretch, become longer and wider. After spraying the foliar fertilizer, the absorption and utilization rate of the nutrients therein is high, and the nutrition is supplemented in time, which has a good promoting effect on the photosynthesis, carbon and nitrogen metabolism of the leaves, and the above-ground-underground transportation efficiency of the photosynthetic products. When the foliar fertilizer is applied, the proportion of the chemical content in the cigar leaves tends to be coordinated, which reduces the occurrence of accumulation of a single substance in the leaves and improves the combustibility of the tobacco leaves.

[0032] In order to further illustrate the present invention, the foliar fertilizer and fertilization method for improving the combustibility of cigar tobacco leaves provided by the present invention are further described in detail below in conjunction with the accompanying drawings and embodiments. Among them, the raw materials used are easy to dissolve, zinc sulfate can be replaced by zinc sulfate heptahydrate according to the amount of zinc element, and ammonium molybdate is ammonium molybdate tetrahydrate replaced according to the amount of molybdenum element; the seaweed extract used is purchased from Qingdao Songtian Biotechnology Co., Ltd.

[0033] Example 1 A foliar fertilizer for improving the combustibility of cigar tobacco leaves, the foliar fertilizer comprises the following effective ingredients by mass percentage: 0.325% of magnesium amino acid, 0.175% of amino acid, 0.06% of seaweed extract, 0.06% of boric acid, 0.06% of zinc sulfate, 0.03% of ammonium molybdate, and the balance is water. The magnesium amino acid is magnesium glycinate, and the amino acid is glycine.

[0034] A fertilization method for improving the combustibility of cigar tobacco leaves comprises the following steps: (1) When the cigar tobacco seedlings enter the clumping stage (32 days after transplanting), spray foliar fertilizer on the cigar tobacco seedlings; the average amount used is 50 mL / plant.

[0035] (2) When the cigar tobacco plants enter the vigorous growth period (45 days after transplanting), spray the cigar tobacco plants with foliar fertilizer; the average amount used is 100 mL / plant.

[0036] When spraying, the above foliar fertilizer is sprayed on both sides of the cigar leaves before 9 am and after 4 pm on a sunny day.

[0037] Example 2 A foliar fertilizer for improving the combustibility of cigar tobacco leaves. The foliar fertilizer comprises the following effective ingredients by mass percentage: 0.4% of amino acid magnesium, 0.15% of amino acid, 0.06% of seaweed essence, 0.06% of boric acid, 0.068% of zinc sulfate, 0.03% of ammonium molybdate and the balance of water.

[0038] Wherein, the amino acid magnesium is magnesium glycinate, and the amino acid is glycine.

[0039] Example 3 A foliar fertilizer for improving the combustibility of cigar tobacco leaves. The foliar fertilizer comprises the following effective ingredients by mass percentage: 0.3% of amino acid magnesium (magnesium glutamate), 0.04% of seaweed essence, 0.05% of boric acid, 0.03% of zinc sulfate, 0.03% of ammonium molybdate and the balance of water.

[0040] Comparative Example 1 A foliar fertilizer comprises the following effective ingredients by mass percentage: 0.5% of magnesium sulfate heptahydrate and the balance is water.

[0041] Comparative Example 2 A foliar fertilizer comprises the following effective ingredients by mass percentage: 0.325% of amino acid magnesium, 0.175% of amino acid, and the balance is water.

[0042] Comparative Example 3 A foliar fertilizer comprises the following effective ingredients by mass percentage: 0.325% of amino acid magnesium, 0.175% of amino acid, 0.06% of boric acid, 0.06% of zinc sulfate, 0.03% of ammonium molybdate, and the balance is water.

[0043] Effect verification Treatment group 1: The foliar fertilizer of comparative example 1 (magnesium sulfate heptahydrate with an active ingredient of only 0.5%) was sprayed, and the spraying steps and dosage were the same as those in Example 1.

[0044] Treatment Group 2: The foliar fertilizer of Comparative Example 2 (with only 0.325% of amino acid magnesium and 0.175% of amino acid as active ingredients) was sprayed, and the spraying steps and dosage were the same as those in Example 1.

[0045] Treatment group 3: The foliar fertilizer of comparative example 3 (excluding seaweed essence) was sprayed, and the spraying steps and dosage were the same as those of example 1.

[0046] Treatment group 4: the foliar fertilizer and fertilization method of Example 1 were used.

[0047] On May 28, 2023, the experiment was conducted in Xianggou Village, Lvshui Town, Laifeng County, Enshi Prefecture, Hubei Province. Each treatment group was randomly assigned 180 plants for transplanting. The field management, fertilization time and amount, and harvest time were the same. The agronomic traits (Table 1), yield and output value (Table 2) of cigar tobacco obtained from treatment groups 1-4 were investigated and statistically analyzed, and the combustibility of the middle tobacco leaves was determined and analyzed. The agronomic trait investigation method of tobacco plants was based on the national standard YC / T 142-2010 "Agronomic Trait Investigation and Measurement Method for Tobacco" to measure the agronomic traits (leaf length, leaf width, number of effective leaves, leaf SPAD value) of different treatments. The yield and output value were graded and calculated according to the Hubei Provincial Local Standard "DB42 / T1549-2020 Cigar Tobacco Grade Quality Specifications", and the yield of tobacco leaves of each treatment was counted for the grade of wrapper, binder, and core. The tobacco leaf output value was calculated based on the purchase price of cigar tobacco leaves in Hubei Province in 2023.

[0048] Table 1 Survey results of agronomic traits of cigars at maturity

[0049] According to the results in Table 1, during the maturity period of cigars, the maximum leaf length, maximum leaf width and leaf SPAD value of cigar tobacco leaves in treatment group 4 were not significantly different from those in treatment groups 1-3, but in terms of values, the value of treatment group 4 was the largest. In summary, during the maturity period of cigars, treatment group 4 can promote the elongation and extension of tobacco leaves and the synthesis of leaf chlorophyll.

[0050] Table 2 Economic benefits of cigars

[0051] As can be seen from Table 2, treatment group 2 has the highest yield but the lowest rate of high-quality tobacco, while treatment group 4 has a slightly lower yield but the highest rate of high-quality tobacco, average price and output value, reaching 34%, 44.46 yuan / kg and 4783.48 yuan / mu respectively, indicating that the method of the present invention effectively improves the quality and output value of tobacco leaves.

[0052] In terms of the determination and analysis of the combustibility of cigar tobacco leaves: the middle leaves were selected and the main veins of the leaves were removed as the test samples. The combustion characteristics of tobacco leaves were analyzed using a thermogravimetric analyzer (TA) under the following conditions: air atmosphere, 10 mg of the sample passed through a 65-mesh sieve was weighed in a platinum crucible, the initial temperature was room temperature (21°C), and the temperature was raised to 980°C at 30°C / min. The curve of the change in sample weight with temperature was obtained, and the curve was differentiated once to obtain the DTG curve of the sample. In this work, based on the combustion weight loss (thermal gravity analysis, TG) curve and weight loss rate (differential thermal gravity, DTG) curve of the combustion spectrum, the TG-DTG joint definition method was used to determine the combustion characteristic parameters of tobacco leaves, such as the combustion starting temperature, maximum burning rate, maximum burning rate temperature, and residue mass fraction. The results and analysis of the cigar tobacco leaf combustibility determination are as follows: (1) Investigate the effects of different treatments on the pyrolysis behavior of cigar tobacco leaves: The results of the effects of different treatments on the pyrolysis behavior of cigar tobacco leaves are as follows: Figure 1 and Figure 2 shown.

[0053] based on Figure 1 and Figure 2The TG and DTG curves of cigar tobacco leaves burning at a heating rate of 30℃ / min showed that the thermal decomposition processes of cigar tobacco samples with different treatments were similar. As the temperature rises, the pyrolysis process of cigar tobacco leaves can be divided into five weight loss stages. Stage I (21℃~105℃) is the dehydration and drying stage, which is mainly the evaporation of free water and bound water inside the tobacco leaves; Stage II (105℃~295℃) corresponds to the thermal decomposition of low-boiling organic matter and hemicellulose, and the release of nicotine in tobacco and the decomposition of pectin also occur within this temperature range; The temperature range and peak temperature of Stage III (295℃~415℃) are close to the pyrolysis of cellulose, indicating that this stage is mainly affected by cellulose; Stage IV (415℃~820℃) is mainly the decomposition of the remaining char and lignin after the previous stage of combustion. After 405℃, the weight loss rate increases and then slows down until around 720℃, at which time the weight loss rate begins to increase, and the lignin is further decomposed and oxidized; Stage V (820℃~980℃) is a stage where the weight loss rate slows down (≤0.09% / min), and a small amount of residual carbon is mainly slowly oxidized.

[0054] The rapid pyrolysis combustion of cigar tobacco leaves mainly occurs in stages II and III, and its specific parameters and mass loss results are shown in Table 3.

[0055] Table 3 Parameters and mass loss of cigar tobacco leaves in the second and third stages of pyrolysis

[0056] Combination Figure 1-Figure 2 As shown in Table 3, compared with treatment groups 1-3, it can be seen that treatment group 4 has the highest maximum combustion rate in the pyrolysis stage II, and the maximum combustion rate in the stage III is slightly lower than that of treatment group 3. In addition, the difference in the combustion rates of treatment group 4 in stages II and III is the smallest, and the corresponding temperature at the maximum combustion rate is the lowest. In addition, the total weight loss rate of treatment group 4 in stages II and III is the highest at 48.13%, and the ash content is the lowest at 12.5%. In summary, the tobacco leaves of treatment group 4 are in a relatively stable combustion rate state in stages II and III during the combustion process, and are more completely oxidized than other treatments.

[0057] (2) Investigate the effects of different treatments on the combustion characteristic parameters of cigar tobacco leaves: Based on the TG and DTG curves of tobacco leaf combustion, the TG-DTG joint definition method was used to determine the combustion start temperature and burnout temperature parameters of tobacco leaves; the TG-DTG joint definition method is shown in Figure 3 , where the combustion starting temperature (i.e. ignition temperature) : Draw a vertical line A through the peak point of the DTG curve, intersecting the TG curve at a point, and draw a tangent line B through the point. The temperature corresponding to the intersection of the tangent line B and the upper horizontal line in the figure (when the volatile matter begins to lose weight) is the ignition temperature. : The temperature corresponding to the intersection of the above tangent line B and the lower horizontal line in the figure (i.e. when the TG curve ends weightlessness) is the burnout temperature.

[0058] Specific analysis method: The combustion process of tobacco samples is complex. In order to better evaluate the combustibility of cigar tobacco leaves, the ignition index ( )、Combustion Stability Index( ) and comprehensive combustion characteristics index ( ) to evaluate the combustion performance of cigar tobacco leaves with different treatments. The ignition performance of the samples and There is a positive correlation. The value reflects the flammability and reactivity of the sample. It is mainly used to evaluate the combustion stability of samples during the combustion process. The larger it is, the more stable the combustion. The larger the value, the better the overall combustion performance of the sample.

[0059] Ignition Index:

[0060] Combustion stability index:

[0061] Comprehensive combustion characteristics index:

[0062] Average burning rate:

[0063] In formulas (1), (2), (3), and (4), is the maximum burning rate (maximum weight loss rate), % / min; is the average burning rate, % / min; Corresponding combustion starting temperature, °C; The temperature corresponding to the maximum burning rate, °C; is the burnout temperature, °C; is the heating rate, °C / min; The sample temperature reaches the combustion start temperature The corresponding residual mass fraction of the sample is %; The sample temperature reaches the burnout temperature The corresponding remaining mass fraction of the sample is %.

[0064] The relevant results of each treatment group obtained by the TG-DTG combined definition method are shown in Table 4.

[0065] Table 4 Pyrolysis characteristic parameters of cigar tobacco leaves

[0066] Note: Corresponding combustion starting temperature, °C; The temperature corresponding to the maximum burning rate, °C; is the burnout temperature, °C, is the maximum burning rate, % / min; is the average burning rate, % / min; Ignition index, % min -1 ℃ -2 ; Is the combustion stability index, %·min -1 ℃ -1 ; is the comprehensive combustion characteristic index, % 2 ·min -2 ℃ -3 .

[0067] As shown in Table 4, compared with treatment groups 1-3, the combustion start temperature and burnout temperature of the cigar tobacco leaves in treatment group 4 were the lowest, and the maximum burning rate ( ), average burning rate ( )、Ignition Index( )、Combustion Stability Index( ) and comprehensive combustion characteristics index ( ), indicating that the cigar tobacco leaves in treatment group 4 are easy to ignite, have a stable combustion process, burn fully, and have the best comprehensive combustion performance.

[0068] The results of the embodiments show that the foliar fertilizer and fertilization method provided by the present invention can effectively improve the combustibility of tobacco leaves. The treated tobacco leaves have low ash content, maximum ignition index, combustion stability index and comprehensive combustion characteristic index, and optimal combustibility.

[0069] Different from the prior art, the present invention provides a foliar fertilizer and fertilization method for improving the combustibility of cigar tobacco leaves. The foliar fertilizer for improving the combustibility of cigar tobacco leaves of the present invention comprises the following effective ingredients: 0.3% to 0.7% of amino acid magnesium fertilizer, 0.03% to 0.07% of seaweed essence, 0.04% to 0.07% of boric acid, 0.02% to 0.07% of zinc sulfate, 0.02% to 0.04% of ammonium molybdate and the remainder of water; the amino acid magnesium fertilizer contains more than 60% of amino acid magnesium, and the remainder is amino acid. The foliar fertilizer of the present invention helps to regulate the nutritional balance of plants, promote the photosynthesis of leaves, and regulate the content of chemical components in tobacco leaves by promoting the absorption of magnesium and other trace elements by tobacco leaves, thereby improving the yield and quality of cigar tobacco leaves and improving the combustibility of tobacco leaves. The addition of seaweed essence, a natural active substance, can increase the amount and time of foliar fertilizer adhering to the surface of leaves, promote the penetration of foliar fertilizer through leaf biofilm and absorption on the surface of leaves, and enhance fertilizer efficiency. In the application example, compared with the comparative example, the tobacco leaf output value of the method of the present invention increased by 39.11 yuan to 245.55 yuan per mu, the rate of high-quality tobacco increased by 0.09% to 4.8%, and the purchase price of tobacco leaf per kilogram increased by 1.38 yuan to 2.71 yuan. In terms of the combustibility of tobacco leaves, due to the low order of magnitude of the data, it is expressed as a relative change ratio; compared with the comparative example, the ash content of the tobacco leaves treated by the method of the present invention was relatively reduced by 1.96% to 4.36%, the ignition index was relatively increased by 2.13% to 4.35%, the combustion stability index was relatively increased by 1.10% to 6.98%, and the comprehensive combustion characteristic index was relatively increased by 4.10% to 9.05%, indicating that the tobacco leaves treated by the method of the present invention are easy to ignite, the combustion process is stable, the combustion is sufficient, and the comprehensive combustion performance is good. In summary, the method of the present invention has an obvious effect on improving the combustibility of cigar tobacco leaves, is green and safe, and has a simple method of use, and at the same time has a certain effect of increasing output value.

[0070] The specific implementation of the present invention described above does not constitute a limitation on the protection scope of the present invention. Any other corresponding changes and modifications made based on the technical concept of the present invention should be included in the protection scope of the claims of the present invention.

Claims

1. A foliar fertilizer for improving the combustibility of cigar tobacco leaves, characterized in that: The foliar fertilizer comprises the following components in percentage by mass: 0.3% to 0.7% of amino acid magnesium fertilizer, 0.03% to 0.07% of seaweed essence, 0.04% to 0.07% of boron fertilizer, 0.02% to 0.07% of zinc fertilizer, 0.02% to 0.04% of molybdenum fertilizer and the balance of water.

2. The foliar fertilizer for improving the combustibility of cigar tobacco leaves according to claim 1, characterized in that: The amino acid magnesium fertilizer contains more than 60% of amino acid magnesium, and the remainder is amino acids.

3. The foliar fertilizer for improving the combustibility of cigar tobacco leaves according to claim 2, characterized in that: The foliar fertilizer comprises the following ingredients in percentage by mass: 0.3% to 0.5% of amino acid magnesium, 0% to 0.2% of amino acid, 0.04% to 0.06% of seaweed essence, 0.05% to 0.06% of boron fertilizer, 0.03% to 0.07% of zinc fertilizer, 0.02% to 0.04% of molybdenum fertilizer and the balance of water.

4. The foliar fertilizer for improving the combustibility of cigar tobacco leaves according to claim 2, characterized in that: The invention comprises the following ingredients in percentage by mass: 0.3% to 0.35% of amino acid magnesium, 0.01% to 0.2% of amino acid, 0.04% to 0.06% of seaweed essence, 0.05% to 0.06% of boron fertilizer, 0.03% to 0.07% of zinc fertilizer, 0.02% to 0.04% of molybdenum fertilizer and the balance of water.

5. The foliar fertilizer for improving the combustibility of cigar tobacco leaves according to claim 2, characterized in that: 0.325% amino acid magnesium, 0.175% amino acid, 0.06% seaweed essence, 0.06% boron fertilizer, 0.06% zinc fertilizer, 0.03% molybdenum fertilizer and the rest water.

6. The foliar fertilizer for improving the combustibility of cigar tobacco leaves according to claim 1, characterized in that: The boron fertilizer includes boric acid or sodium borate; the zinc fertilizer includes zinc sulfate; and the molybdenum fertilizer includes ammonium molybdate or sodium molybdate.

7. A method for applying foliar fertilizer to improve the combustibility of cigar tobacco leaves, characterized in that: The following steps are involved: The foliar fertilizer according to any one of claims 1 to 6 is sprayed on the leaves of cigar plants, and the spraying time is: the first spraying is carried out during the clustering stage of the cigar plants, and the second spraying is carried out during the vigorous growth stage; wherein the clustering stage of the cigar plants is 28 to 33 days after transplanting survival, and the vigorous growth stage is 45 to 55 days after transplanting survival.

8. The method for applying foliar fertilizer for improving the combustibility of cigar tobacco leaves according to claim 7, characterized in that: The foliar fertilizer is sprayed on a sunny day before 9 am or after 4 pm.

9. The method for applying foliar fertilizer for improving the combustibility of cigar tobacco leaves according to claim 7, characterized in that: The foliar fertilizer is sprayed on the front side and / or the back side of the leaves of the cigar tobacco plants.

10. The method for applying foliar fertilizer for improving the combustibility of cigar tobacco leaves according to claim 7, characterized in that: The spraying amount of the foliar fertilizer is: 40 mL to 60 mL per plant during the clustering stage, and 80 mL to 100 mL per plant during the vigorous growth stage.

Images