Tobacco planting nutritional agent and preparation method thereof

Abstract

The invention belongs to the technical field of cultivation in crop seedling production, and particularly relates to a tobacco planting nutritional agent and a preparation method thereof. The tobacco planting nutritional agent is prepared from the following components in parts by weight: 20 to 25 parts of modified seaweed mud, 3 to 6 parts of vitamin, 2 to 3 parts of acetylsalicylic acid, 45 to 55 parts of animal waste and 15 to 25 parts of compound fertilizer, the modified seaweed mud is obtained by roasting seaweed mud, shrimp and crab meal, magnesium sulfate and borax in a two-stage heating manner for 3-5 hours, and then grinding and sieving the roasted seaweed mud, the shrimp and crab meal, the magnesium sulfate and the borax. The nutritional agent provided by the invention provides good growth and development nutrition and a safe soil environment for the growth of seedlings after sending-planting, promotes the growth and development of root systems of the seedlings after sending-planting, cultivates strong seedlings, ensures the survival rate and good growth and development after transplanting, and has relatively good practicability and application value.

Description

Technical Field

[0001] The invention belongs to the technical field of cultivation in crop seedling production, and particularly relates to a tobacco planting nutrient agent and a preparation method thereof. Background Art

[0002] In the tobacco-growing areas in southern my country, intensive seedling raising technology is generally used for seedling cultivation in flue-cured tobacco production. Before the four leaves and one heart, the flue-cured tobacco seedlings are cultivated by floating seedling raising. After the four leaves and one heart, the two-stage seedling raising is carried out by adopting the planting technology. After the seedlings are mature, they are transplanted to the field. Due to the low temperature, low light and heavy rain in spring in southern my country, the tobacco seedlings cultivated by the floating tobacco seedling technology used in flue-cured tobacco have low root vitality, underdeveloped root system and poor stress resistance. After being transplanted to the field, they often grow slowly and have a long seedling acclimatization period, which affects the high-yield, high-quality and efficient production of flue-cured tobacco. In order to solve this problem, a two-stage seedling raising technology combining centralized floating seedling raising and nutrient soil planting is adopted in tobacco production. However, the implementation of such technical measures requires the configuration of nutrient soil for planting. The quality of nutrient soil for planting directly affects the growth and development of tobacco seedlings, their resistance to diseases and insects, and their resistance to adversity, and shortens or eliminates the seedling acclimatization period. However, in the existing two-stage flue-cured tobacco seedling cultivation, the nutrient content of the planting nutrient soil is often incomplete, insufficient, and insufficiently sterilized, resulting in poor quality of the two-stage seedlings in production and prone to disease.

[0003] Prior art CN 113563129 A proposes a carbon-based seaweed microbial fertilizer for tobacco and its preparation method. The invention includes the following raw materials: 30-40 parts of seaweed residue, 30-40 parts of straw, 25-35 parts of animal feces, 50-60 parts of biochar, 100-200 parts of charcoal ... 5-10 parts of microbial fermentation agent and 50-100 parts of water; the microbial fermentation agent is Bacillus aryabhattai, which was deposited in the General Microbiological Center of the China Microbiological Culture Collection Administration on May 9, 2020, with a deposit number of CGMCCNO.19788. The invention also provides a method for preparing the above-mentioned biofertilizer. The components of the invention are reasonably matched, which enriches the effective ingredients of the microbial fertilizer, and the combined fermentation enhances the interaction between the components, improves the fertilizer efficiency, and also has the function of preventing and treating tobacco soil-borne diseases such as black shank, comprehensively promoting tobacco growth, and improving tobacco leaf quality, which is worthy of large-scale promotion and application.

[0004] Prior art CN 114455996 A discloses a special seaweed biofertilizer for tobacco, which includes 26-35 parts of rapeseed cake fertilizer, 3-6 parts of seaweed fermentation products with biological activity, 18-22 parts of nitrogen fertilizer, 13-20 parts of phosphate fertilizer, 16-22 parts of potash fertilizer, 2-3 parts of silane coupling agent, 1-2 parts of polyaspartic acid, 0.5-2.5 parts of medium and trace elements and 0.5-1 part of roasted shell powder; the seaweed biofertilizer is crushed, mixed into water fertilizer, and then irrigated to the root part of tobacco through a special fertilization device. The biofertilizer of the invention adds a large number of nutrients, medium and trace nutrients, and active seaweed components required for tobacco growth. On the one hand, it can improve the fertility of the soil and conserve arable land. On the other hand, it can also improve the stress resistance of tobacco, reduce the occurrence of pests and diseases, and reduce the application of pesticides. It can ensure the yield and quality of tobacco and the improvement of arable land quality. At the same time, with the special fertilization device of the present invention, it can achieve a significant effect of reducing labor and cost.

[0005] The above two prior arts essentially only provide a kind of biological fertilizer for soil fertilization and promoting the growth of the above-ground part of tobacco seedlings, but they cannot solve the secondary infection caused by root injury and seedling injury during tobacco seedling transplanting, and the active ingredients for promoting root growth and rapid growth after transplanting. Summary of the invention

[0006] The purpose of the present invention is to provide a tobacco planting nutrient agent for promoting the growth and development of planting tobacco seedlings and a preparation method thereof.

[0007] In order to achieve the above object, the technical solution of the present invention is as follows:

[0008] A tobacco planting nutrient comprises, by weight, 20-25 parts of modified seaweed mud, 3-6 parts of vitamins, 2-3 parts of acetylsalicylic acid, 45-55 parts of animal feces, and 15-25 parts of compound fertilizer; the modified seaweed mud is obtained by subjecting seaweed mud, shrimp and crab powder, magnesium sulfate, and borax to two-stage temperature-increasing roasting for 3-5 hours, followed by grinding and sieving.

[0009] The present invention utilizes two-stage high-temperature roasting to decompose the organic components in the seaweed mud, fixes the porous structure of the seaweed mud, provides attachment positions and binding sites for magnesium sulfate and borax after dehydration, and enhances the effects of magnesium sulfate and borax. At the same time, the residual heat after high-temperature roasting is used to heat the shrimp and crab shell powder, and the protein in the shrimp and crab shell powder is cracked into small-molecule polypeptides or amino acids, and small-molecule substances such as chitosan in the shrimp and crab shell powder are retained. Therefore, the porous structure formed by the modified seaweed mud fertilizer and the synergistic effect of the small-molecule organic substances, zinc elements and boron elements carried by the modified seaweed mud fertilizer not only improve the ability of the seaweed mud to improve the water absorption and water retention of the rhizosphere soil, but also improve the activity of enzymes and the synthesis of chlorophyll, and promote the root development of tobacco seedlings.

[0010] Roasting shrimp and crab powder is beneficial to further remove residual oil stains and thermally crack them into small molecules, which are beneficial for tobacco seedlings to absorb.

[0011] Shrimp and crab meal and other components are complementary and synergistic. The small molecule peptides or amino acids, chitosan and other small molecule substances in shrimp and crab meal, combined with the trace elements in seaweed mud and zinc and boron elements necessary for the growth of tobacco seedlings, form a synergistic effect of 1+1+1 greater than 3.

[0012] In one of the preferred embodiments, the tobacco transplanting nutrient comprises the following raw materials in parts by weight: 22.5 parts of modified seaweed mud, 5 parts of vitamins, 2.5 parts of acetylsalicylic acid, 50 parts of animal manure, and 10 parts of compound fertilizer.

[0013] In one of the preferred embodiments, the modified seaweed fertilizer is calcined in two stages. The first stage is: seaweed mud, magnesium sulfate and borax are mixed and heated to 700-750°C, calcined for 1-2 hours, and then cooled to 200-350°C to obtain component 1; the second stage is: shrimp and crab powder is added to component 1 and roasted at 200-350°C for 2-3 hours; then cooled, ground and sieved to obtain modified seaweed fertilizer.

[0014] If the roasting temperature of modified seaweed mud is too high, it will easily lead to the decomposition of carbonates to form metal oxides, which will turn into hydroxides when in contact with water. They are highly alkaline and not conducive to root growth. If the roasting temperature is too low, the organic matter will not be completely decomposed and the porous structure will not be fixed, affecting its water absorption and water retention properties.

[0015] If the calcination temperature of the shrimp and crab powder is too high, chitosan will be easily decomposed into small molecules, which will lose its original function of promoting the growth of tobacco roots; if the temperature is too low, it will be unfavorable for the protein denaturation and slight decomposition in the shrimp and crab powder, and the purpose of modification cannot be achieved.

[0016] One-time roasting cannot take into account the temperature requirements of seaweed mud and shrimp and crab shell powder. High-temperature roasting easily leads to high-temperature carbonization of shrimp and crab shells, which cannot retain their beneficial small molecules. The porous structure of seaweed mud is unstable under low-temperature roasting. Therefore, the two-stage mode of high-temperature roasting first, cooling to the appropriate temperature and then adding shrimp and crab shell powder can effectively balance the temperature requirements of different materials and achieve the best effect.

[0017] In one preferred embodiment, seaweed mud, shrimp and crab powder, magnesium sulfate and borax are mixed in a mass ratio of (2-3):(2-3):(1-2):(1-2).

[0018] Too much seaweed mud will result in the nutrient being too absorbing and retaining moisture after being applied to the soil, and its air permeability will become poor. Too little seaweed mud will result in the nutrient being loose in texture and unable to fully exert its bonding and moisture absorption and water retention functions. Too much shrimp and crab meal roasted at low temperature contains a large amount of small molecule nitrogen and sugar substances, which lead to excessive microbial reproduction and affect the stability of the nutrient. Too little shrimp and crab meal cannot provide enough small molecule beneficial substances, weakening the structure of the nutrient and nutrient supply function. Too much magnesium sulfate can easily cause the salt content in the nutrient to be too high and produce toxic effects. Too little may lead to insufficient concentration of magnesium ions, and the absorption of the roots of the tobacco seedlings will not be utilized. Borax is a toxic substance. Excessive addition of borax can easily lead to boron accumulation in the tobacco seedlings, affecting the quality. Too little borax does not utilize the absorption of the roots of the tobacco seedlings to achieve its growth-promoting effect.

[0019] In one of the preferred embodiments, the shrimp and crab powder is obtained from kitchen waste crayfish and hairy crab shells, which are degreased, rinsed, dried and crushed at 40-50°C.

[0020] In one preferred embodiment, the particle size of the modified seaweed mud obtained after sieving is 40-50 nanometers.

[0021] In the powder state, the current simple measures can be effectively achieved. The increase in particle size does not take advantage of the modified seaweed mud, and too small a particle size increases the difficulty of achieving it.

[0022] In one preferred embodiment, the magnesium sulfate is magnesium sulfate heptahydrate MgSO4·7H2O.

[0023] In one preferred embodiment, the borax is borax hydrate Na2B4O7.10H2O.

[0024] In one preferred embodiment, the vitamins include 2-3 parts of V-B6 and 2-3 parts of V-B12.

[0025] In a preferred embodiment, the animal manure is any one or more of cow manure, pig manure, chicken manure, duck manure, sheep manure and horse manure, which are obtained by composting, fermenting and drying.

[0026] The decomposed livestock and poultry manure can be fermented in a conventional manner. The present invention has no special restrictions on the type of decomposed livestock and poultry manure, and can be obtained locally according to the type of animals raised locally, and can be any one or more of sheep manure, cow manure, pig manure, horse manure, chicken manure, and duck manure.

[0027] In one preferred embodiment, the drying is air-drying at room temperature.

[0028] In one preferred embodiment, the compound fertilizer is a compound fertilizer containing N, P, and K elements; in the compound fertilizer, the molar ratio of N:P2O5:K2O is (15-20):(15-20):(15-20).

[0029] Based on the same inventive concept, the present invention also claims a method for preparing the tobacco transplanting nutrient, which comprises the following steps:

[0030] The modified seaweed mud, vitamins and acetylsalicylic acid are uniformly mixed to obtain component 1 for later use;

[0031] The animal excrement and compound fertilizer are mixed evenly, and then component 1 is added and mixed to obtain the tobacco transplanting nutrient agent.

[0032] Based on the same invention, the present invention also claims to protect the application of the tobacco transplanting nutrient, including: mixing the tobacco transplanting nutrient with sterilized soil or mud for tobacco seedling planting.

[0033] In one of the preferred embodiments, the tobacco transplanting nutrient agent is mixed with sterilized soil or mud in a mass ratio of (1-2):(50-150).

[0034] In one of the preferred embodiments, the tobacco seedlings are flue-cured tobacco floating seedlings that are about to be planted at the 3-4 leaf stage after emergence.

[0035] The invention provides a tobacco transplanting nutrient agent, which is used for preparing transplanting nutrient soil in two-stage seedling cultivation, and provides comprehensive and sufficient nutrients for the growth and development of flue-cured tobacco seedlings during the transplanting period, as well as an environment conducive to root growth, so as to overcome the main problems existing in the existing transplanting production, cultivate strong seedlings, and realize early growth and rapid development of the seedlings after planting.

[0036] The nutrient of the present invention comprises two major components: functional substances (modified seaweed mud fertilizer, VB6, VB12, acetylsalicylic acid) and auxiliary materials (decomposed animal feces, compound fertilizer). High-temperature roasting is used to decompose the organic components in the seaweed mud to form a cavity. At the same time, the shrimp and crab shell powder is heat-insulated and roasted by the residual heat after high-temperature roasting. The protein in the shrimp and crab shell powder is destroyed during the heat-insulating roasting, and is cracked into small molecule polypeptides or amino acids. The difference in the cracking temperature between protein and carbohydrate substances is used to retain small molecule substances such as chitosan in the shrimp and crab shell powder. Therefore, through a two-stage warming modification process, a cavity with seaweed mud as a carrier is formed, and small molecule polypeptides or amino acids, chitosan and trace elements such as zinc and boron are beneficial ingredients, which complement and synergize to improve the water absorption and water retention performance of the rhizosphere soil, contribute to the activity of enzymes and the synthesis of chlorophyll, and promote the root development of tobacco seedlings. Animal feces, as the main source of organic matter, improve soil structure, increase the water retention and air permeability of non-rhizosphere soil, and promote microbial activity. VB6 and VB12 work together to promote photosynthesis and nucleic acid synthesis of plants, enhance metabolic activity and stress resistance of plants, and improve growth rate and disease resistance. On the one hand, acetylsalicylic acid can improve plant stress resistance, reduce the occurrence of diseases, and promote growth and development. At the same time, when used in combination with modified seaweed mud, seaweed mud fertilizer is rich in various trace elements, which can enhance plant disease resistance and stress resistance and improve overall growth status.

[0037] In summary, the nutrient provided by the present invention provides comprehensive nutritional support and growth promotion functions by comprehensively using the main ingredients and functional substances: 1) Improve soil quality: decomposed animal manure improves soil structure, increases organic matter and basic nutrients, and provides a good growth environment. 2) Enhance nutrient absorption: zinc sulfate and borax provide essential trace elements, which promote plant nutrient absorption and metabolism. 3) Promote plant growth: VB6 and VB12 enhance the metabolic activity and growth rate of plants, acetylsalicylic acid and seaweed extracts improve stress resistance and disease resistance, and promote the healthy growth of plants as a whole. The nutrient provided by the present invention can provide nutrients configured by nutrient soil for the two-stage seedling cultivation after floating tobacco seedlings in the southern tobacco planting area, which is conducive to promoting early growth and rapid development, and cultivating strong seedlings; for the early spring fruit and vegetable seedling cultivation in the southern region, when it is transplanted to the field, it provides the nutrients required for making dowry nutrient soil, promotes the growth and development of seedlings after transplanting, and shortens the seedling acclimatization period. The raw materials of the preparation of the present invention are widely available and inexpensive, and are easy to purchase.

[0038] At the same time, the nutrient agent of the present invention has the characteristics of simple production, low cost, convenient use and easy mastering, better effect than existing technical measures, no environmental pollution, etc., and has good application value. DETAILED DESCRIPTION

[0039] The technical solution of the present invention will be clearly and completely described below in conjunction with the specific 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.

[0040] Example 1

[0041] The experiment was conducted at a tobacco station test base in Liuyang City, Changsha. The experimental flue-cured tobacco was Yunyan 87, which was sown on December 20, 2022. The four-leaf and one-heart tobacco seedlings cultivated by floating tobacco seedlings were prepared with nutrient soil and planted for 25 days before being transplanted to the field.

[0042] The experimental design is "application of the nutrient agent of the present invention (treatment 1), no application of the nutrient agent of the present invention (control, but application of 45% (nitrogen, phosphorus and potassium content 15%) of the ternary compound fertilizer equal to that of treatment 1), treatment 2 (seaweed mud, shrimp and crab powder, magnesium sulfate and borax are directly mixed according to the mass ratio without roasting), treatment 3 (seaweed mud, magnesium sulfate and shrimp and crab powder are roasted according to the mass ratio without adding borax), treatment 4 (seaweed mud, borax and shrimp and crab powder are roasted according to the mass ratio without adding magnesium sulfate), treatment 5 (magnesium sulfate, borax and shrimp and crab powder are roasted according to the mass ratio without adding magnesium sulfate). There are ten treatments, including treatment 6 (roasting at a mass ratio without adding seaweed mud), treatment 7 (roasting seaweed mud, magnesium sulfate and borax at a mass ratio without adding shrimp and crab powder), treatment 8 (without adding acetylsalicylic acid), and treatment 9 (without adding animal feces). Each treatment area has 20 plates [50-hole black plastic floppy disks, 5×10 holes (5.0 cm, volume 55 cc) with a length of 54 cm × a width of 28 cm]. The tobacco seedlings in the treatments with and without the application of fertilizer are all four-leaf and one-heart tobacco seedlings. After the preparation of the nutrient soil for planting on February 25, 2023, they are planted; they are transplanted to the field on March 20, and the planting period is 25 days; the growth and appearance of the tobacco seedlings for planting are kept basically the same.

[0043] The nutrient agent (treatment 1) of this embodiment includes: 22.5 parts of modified seaweed mud, 5 parts of vitamins, 2.5 parts of acetylsalicylic acid, 50 parts of animal feces, and 10 parts of compound fertilizer; the modified seaweed mud is prepared by mixing seaweed mud, magnesium sulfate and borax, heating to 750°C and calcining for 2 hours, and then cooling to 200°C to obtain component 1; the second stage is: adding shrimp and crab powder to component 1 and roasting at 200°C for 3 hours; then cooling, grinding, and passing through a 100-mesh sieve to obtain the modified seaweed mud. The particle size of the modified seaweed mud is 40-50 nanometers.

[0044] The magnesium sulfate is magnesium sulfate heptahydrate MgSO4·7H2O. The borax is borax hydrate Na2B4O7.10H2O. The animal manure is obtained by fermenting and drying cow manure. The compound fertilizer is a ternary compound fertilizer containing 45% of N, P and K elements (15% each of nitrogen, phosphorus and potassium) (for example, the ternary compound fertilizer of Yunnan Mingcheng Fertilizer Co., Ltd.).

[0045] First, the functional substances (modified seaweed mud, VB6, VB12, acetylsalicylic acid) and base fertilizer (animal feces, compound fertilizer) are uniformly mixed according to the mass proportion of each component, and then the two major types of substances are uniformly mixed, and then the mixture of the present invention and the sterile dried and crushed paddy soil are mixed at a mass ratio of 1:100 to prepare the nutrient soil for planting tobacco seedlings. Planting is carried out according to the experimental design.

[0046] 25 days before transplanting, select 20 representative tobacco seedlings with basically the same growth and development for each treatment, and conduct investigation and determination of the main agronomic traits of tobacco seedlings according to the YC / T 142-1998 tobacco agronomic traits investigation method, including:

[0047] 1) Determination of tobacco seedling height and maximum leaf length and width: After the tobacco seedlings are cleaned, they are measured with a ruler (with an accuracy of 1 mm).

[0048] 2) Determination of stem circumference of tobacco seedlings: After the tobacco seedlings are cleaned, they are measured using a vernier caliper (with an accuracy of 0.01 mm).

[0049] 3) Determination and calculation of tobacco seedling leaf area: According to the length and width of the largest leaf of the tobacco seedling, the leaf area (cm2) of the largest leaf is calculated according to the formula "length × width × 0.6345". 2 ).

[0050] At the same time, the tobacco seedlings are:

[0051] 4) Determination of dry matter accumulation of tobacco seedlings: Five representative tobacco seedlings with basically the same growth were selected from each treatment to examine the "fresh weight and dry weight of the root system, stem, and leaves, and calculate the fresh-dry ratio of the aboveground part to the underground part" and the dry mass root-to-shoot ratio (R / S). The fresh weight and dry weight were determined using a balance (accuracy of 0.0001g). After absorbing the water with filter paper, the weight of the seedling leaves, stems, and roots was weighed using a balance. Finishing 15min, 80 Dry to constant weight and measure the dry mass.

[0052] 5) Root activity determination: The root activity of tobacco seedlings was determined by TTC method.

[0053] The result is as follows:

[0054] Table 1 Agronomic characteristics of tobacco seedlings under different treatments

[0055]

[0056]

[0057] The results showed that: (1) after the tobacco seedlings were treated with the composition of the present invention for 25 days, compared with the control, the stem girth, stem height, maximum leaf length, maximum leaf width, maximum leaf area, and number of leaves in the whole seedling increased by 62.5%, 15.1%, 13.6%, 13.4%, 28.8%, and 15.7%, respectively (Table 1). Therefore, the nutrient agent of the present invention was added to the nutrient soil for the tobacco seedlings in the floating seedling cultivation of four leaves and one heart, and the cultivation was carried out for 25 days, which was beneficial to promote the growth and development of the tobacco seedlings during the cultivation period and improve the agronomic traits.

[0058] Table 2 Dry weight and dry-to-fresh ratio of tobacco seedlings treated with different methods

[0059]

[0060] (2) After the tobacco seedlings were treated with the composition of the present invention for 25 days, compared with the control, 1) the dry weight of the aboveground part and the dry weight of the underground part increased by 15.2% and 10.7%, respectively; 2) the root-crown ratio of dry mass was 27.9% higher than that of the control (Table 2). The nutrient agent of the present invention was added to the nutrient soil for tobacco seedlings in the floating seedling cultivation of four leaves and one heart, and the cultivation was carried out for 25 days, which was beneficial to promote the increase of the dry matter accumulation of the roots, stems and leaves of the tobacco seedlings during the cultivation period.

[0061] Table 3 Chlorophyll content of the largest leaf of tobacco seedlings in different treatments (mg / g)

[0062]

[0063]

[0064] (3) After the tobacco seedlings were treated with the composition of the present invention for 25 days, the chlorophyll content of the largest leaf was 18.3% higher than that of the control. The nutrient agent of the present invention was added to the nutrient soil of tobacco seedlings in a floating seedling cultivation with four leaves and one heart, and the cultivation was carried out for 25 days, which was beneficial to promoting the increase of chlorophyll content in tobacco seedling leaves during the cultivation period.

[0065] Table 4 Root activity of tobacco seedlings under different treatments (μg / g·h fresh weight)

[0066]

[0067] (4) After the tobacco seedlings were treated with the composition of the present invention for 25 days, the root activity of the tobacco seedlings was 37.3% higher than that of the control. This shows that the nutrient agent of the present invention is added to the nutrient soil of the tobacco seedlings in the floating seedling cultivation of four leaves and one heart for 25 days, which is beneficial to promoting the improvement of the root activity of the tobacco seedlings during the planting period.

[0068] Therefore, in the present invention, high temperature roasting is used to decompose the organic components in the seaweed mud to form a cavity. At the same time, the residual heat after high temperature roasting is used to heat-insulate the shrimp and crab shell powder. The protein in the shrimp and crab shell powder is destroyed during the heat-insulating roasting, and is cracked into small molecule polypeptides or amino acids. The difference in the cracking temperature between protein and carbohydrate substances is used to retain small molecule substances such as chitosan in the shrimp and crab shell powder. Therefore, after a two-stage temperature increase modification process, a cavity with seaweed mud as a carrier is formed, and small molecule polypeptides or amino acids, chitosan and trace elements such as zinc and boron are used as beneficial ingredients. The complementary and synergistic effects improve the water absorption and water retention properties of the rhizosphere soil, contribute to the activity of enzymes and the synthesis of chlorophyll, and promote the root development of tobacco seedlings; on the basis of improving the non-rhizosphere soil structure with animal feces, acetylsalicylic acid, VB6 and VB12 can effectively control the infection of pathogens, promote growth and development, and improve the overall growth state. It can provide the nutrients configured in the nutrient soil for the two-stage seedling cultivation after floating tobacco seedlings in the southern tobacco-growing areas, which is beneficial to promote early growth and rapid development and cultivate strong seedlings; it can provide the nutrients needed to make dowry nutrient soil for early spring fruit and vegetable seedlings in the southern region when they are transplanted to the field, promote the growth and development of seedlings after transplanting, and shorten the seedling acclimatization period.

[0069] The raw materials of the preparation of the present invention are widely available and inexpensive, and are easy to purchase.

[0070] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A tobacco planting nutrient, characterized in that: The invention comprises, by weight, 20-25 parts of modified seaweed mud, 3-6 parts of vitamins, 2-3 parts of acetylsalicylic acid, 45-55 parts of animal feces and 15-25 parts of compound fertilizer; the modified seaweed mud is prepared by roasting seaweed mud, shrimp and crab powder, magnesium sulfate and borax for 3-5 hours through a two-stage temperature-increasing modification process, and then grinding and sieving the seaweed mud.

2. The tobacco planting nutrient according to claim 1, characterized in that The invention comprises the following raw materials in parts by weight: 22.5 parts of modified seaweed mud, 5 parts of vitamins, 2.5 parts of acetylsalicylic acid, 50 parts of animal manure and 10 parts of compound fertilizer.

3. The tobacco planting nutrient according to claim 1, characterized in that: The modified seaweed fertilizer adopts a two-stage temperature-increasing calcination, wherein the first stage is: mixing seaweed mud, magnesium sulfate and borax, heating to 700-750° C., calcining for 1-2 hours, and then cooling to 200-350° C. to obtain component 1; the second stage is: adding shrimp and crab powder to component 1, roasting at 200-350° C. for 2-3 hours; then cooling, grinding and sieving to obtain the modified seaweed fertilizer.

4. The tobacco planting nutrient according to claim 1, characterized in that: Seaweed mud, shrimp and crab powder, magnesium sulfate and borax are mixed in a mass ratio of (2-3):(2-3):(1-2):(1-2).

5. The tobacco planting nutrient according to claim 5, characterized in that: Shrimp and crab powder is obtained from kitchen waste crayfish and hairy crab shells, which are degreased, rinsed, dried and crushed at 40-50℃.

6. The tobacco planting nutrient according to claim 1, characterized in that: The particle size of the modified seaweed mud is 40-50 nanometers.

7. The tobacco planting nutrient according to any one of claims 1 to 6, characterized in that: Vitamins include 2-3 The animal manure is any one or more of cow manure, pig manure, chicken manure, duck manure, sheep manure and horse manure, which are obtained by composting, fermenting and drying.

8. The method for preparing the tobacco planting nutrient according to any one of claims 1 to 7, characterized in that: The following steps are involved: The modified seaweed mud, vitamins and acetylsalicylic acid are uniformly mixed to obtain component 1 for later use; The animal excrement and compound fertilizer are mixed evenly, and then component 1 is added and mixed to obtain the tobacco transplanting nutrient agent.

9. The use of the tobacco planting nutrient according to any one of claims 1 to 7, characterized in that: include: The tobacco transplanting nutrient agent is mixed with sterilized soil or mud for tobacco seedling transplanting.

10. The use according to claim 9, characterized in that: The tobacco transplanting nutrient agent is mixed with sterilized soil or mud in a mass ratio of (1-2):(50-150).

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