Novel fertilizer containing seaweed oligosaccharide and application of novel fertilizer in acidified cultivated land

Abstract

The invention relates to a novel fertilizer containing seaweed oligosaccharide and application of the novel fertilizer in acidified cultivated land, and relates to the technical field of fertilizer.The novel fertilizer containing seaweed oligosaccharide comprises, by weight, 8-12 parts of seaweed oligosaccharide; 30-40 parts of lignite humic acid; 20-30 parts of a nitrogen-phosphorus-potassium compound fertilizer; and 10-12 parts of calcium silicate. The novel fertilizer is applied to acidified cultivated land and is also applied to promotion of plant root growth and improvement of plant acid resistance and immunocompetence. The fertilizer not only has the effect of improving acidified soil, but also is beneficial to the root growth of plants and improves the immunocompetence and acid resistance.

Description

Technical Field

[0001] The invention relates to the technical field of fertilizers, in particular to a novel fertilizer containing seaweed oligosaccharides and application of the fertilizer in acidified farmland. Background Art

[0002] Red soil is one of the important soil types in southern my country, covering 13 provinces (regions), 619 counties (cities) and an area of ​​1.13 million km. 2 , accounting for 11% of the country's soil area, plays a very important role in my country's food security. However, in recent years, the acidification of red soil has intensified, seriously restricting the sustainable development of agriculture in the region. Studies have shown that excessive application of chemical nitrogen fertilizers is the main reason for the acidification of farmland soil in red soil areas. For example, chemical nitrogen fertilizers applied to the soil are generally converted into nitrate nitrogen within one month and release hydrogen ions (H + ), acidifying the soil; if the generated nitrate nitrogen is not absorbed and utilized by crops, it will be lost due to rainfall leaching, causing permanent soil acidification.

[0003] When soil acidification is severe, it will have an adverse effect on plant growth and development, causing the loss of exchangeable cations in the soil and increasing the solubility of harmful elements such as aluminum, manganese, and cobalt in the soil. This will limit the development of plant roots, reduce the effectiveness of nutrients, make plants susceptible to diseases and pests, and even affect plant yield and quality.

[0004] At present, lime-based substances are generally used in agricultural production to improve acidified soil. The application of lime cannot fundamentally solve the problem of soil acidification, and there are also some adverse effects, such as: reducing soil permeability, slowing the growth of leguminous and non-leguminous crops, and reducing plant absorption of phosphorus.

[0005] The inventors have proposed a new type of fertilizer containing seaweed oligosaccharides and its application in acidified farmland, which not only has the effect of improving acidified soil, but also is beneficial to the root growth of plants, and improves immunity and acid resistance. Summary of the invention

[0006] In view of the shortcomings of the prior art, the purpose of the present invention is to provide a new type of fertilizer containing seaweed oligosaccharides and its application in acidified farmland, which can not only effectively improve the effect of acidified soil, but also is beneficial to the growth of plant roots and improve the immunity and acid resistance of plants.

[0007] The following are the specific technical solutions: A novel fertilizer containing seaweed oligosaccharides comprises the following components in parts by weight: 8-12 parts of seaweed oligosaccharides; 30-40 parts of lignite humic acid; 20-30 parts of nitrogen, phosphorus and potassium compound fertilizer; and 10-12 parts of calcium silicate. For plants, seaweed oligosaccharides can not only promote the growth of plant roots and improve photosynthesis efficiency, but also enhance the stress resistance and immunity of plants, thereby improving quality and yield; for soil, seaweed oligosaccharides can be combined with calcium silicate to improve acidified soil, and the effect of the combination of the two is much greater than that of a single use. At the same time, seaweed oligosaccharides, as natural chelating agents, can enhance the stability and biological activity of trace elements in plants, and seaweed oligosaccharides can ensure the stability of lignite humic acid and nitrogen, phosphorus and potassium compound fertilizers to a certain extent, thereby reducing the supplementation and use of fertilizers during plant growth.

[0008] The novel fertilizer also includes 10 to 12 parts of composite amino acids. The composite amino acids include aspartic acid, arginine, and threonine. Adding composite amino acids to the fertilizer, the amino acids cooperate with seaweed oligosaccharides to further promote the growth of plant roots, and are also beneficial to promoting the growth of the aboveground parts of plants. At the same time, seaweed oligosaccharides can also help ensure the stability and slow release of amino acids. The aspartic acid used specifically participates in the synthesis of proteins in the plant body and provides nitrogen for growth during stress periods; arginine can enhance root development, is a precursor for the synthesis of plant endogenous hormone polyamines, and can also improve the ability of crops to resist salt stress; threonine can improve the tolerance of crops and resistance to insect pests and diseases, while promoting the humification process, and can have a good compatibility with lignite humic acid; in general, after supplementing aspartic acid, arginine and threonine, not only can the stress resistance of crops be improved, but also the use of nitrogen fertilizers can be reduced to a certain extent.

[0009] The novel fertilizer also includes 8 to 10 parts of silicon dioxide and 8 to 10 parts of magnesium oxide. Under the action of seaweed oligosaccharides, silicon dioxide and magnesium oxide have good stability and slow release, and can gradually release silicon dioxide and magnesium oxide into the soil, playing a more lasting and effective role in treating acidified soil. At the same time, silicon dioxide can promote the formation of silicified cells in plants, thicken the cell walls on the surface of plant stems and leaves, increase the cuticle, and improve the ability of crops to prevent cracked fruits and lodging; in addition to improving acidified soil, magnesium oxide can increase soil fertility and promote microbial activity, and can also provide the magnesium element required for plant growth, promote the synthesis of chlorophyll, and work together with seaweed oligosaccharides, complex amino acids, etc. to promote the development of plant roots and improve plant stress resistance.

[0010] The novel fertilizer also includes 4 to 8 parts of microbial agents. The microbial agents include humic acid nitrogen-fixing bacteria, humic acid phosphate-dissolving bacteria, humic acid potassium-dissolving bacteria, Bacillus subtilis, and silicate colloid bacillus. The mass ratio of the humic acid nitrogen-fixing bacteria fertilizer, the humic acid phosphate-dissolving bacteria fertilizer, the humic acid potassium-dissolving bacteria fertilizer, the Bacillus subtilis, and the silicate colloid bacillus is 1:(1~2):(1~2):(2~4):(2~4). Supplementing microbial agents in fertilizers can significantly improve the soil environment and further play a role in slow-release elements required for crops. For example, the humic acid nitrogen-fixing bacteria, the humic acid phosphate-dissolving bacteria, and the humic acid potassium-dissolving bacteria can decompose the effective substances in lignite humic acid, thereby providing the required elements for plant growth. The composite composition of seaweed oligosaccharides and Bacillus subtilis performs well in promoting plant growth. Silicate colloidal Bacillus not only has the function of decomposing calcium silicate, but also controls the decomposition efficiency of calcium silicate under the action of seaweed oligosaccharides, which not only treats acidified soil but also plays a role in slowly releasing silicon.

[0011] Application of a new type of fertilizer containing seaweed oligosaccharides in acidified farmland. Application of a new type of fertilizer containing seaweed oligosaccharides in promoting plant root growth and improving plant acid resistance and immunity. Apply the new fertilizer to the soil at 60-100 kg / mu. The new type of fertilizer containing seaweed oligosaccharides can not only be applied to acidified farmland to help treat acidified soil and provide a better growth environment for plants; it can also be applied to promote plant root growth and improve plant acid resistance and immunity. The amount of the new type of fertilizer containing seaweed oligosaccharides is significantly lower than that of ordinary fertilizers. The new type of fertilizer containing seaweed oligosaccharides has better utilization and conversion rates, and can further reduce soil acidification caused by excessive application of fertilizers.

[0012] In summary, the present invention includes the following beneficial technical effects: 1. For plants, seaweed oligosaccharides can not only promote the growth of plant roots and improve the efficiency of photosynthesis, but also enhance the stress resistance of plants and improve their immunity, thereby improving quality and yield; for soil, seaweed oligosaccharides can be combined with calcium silicate to improve acidified soil, and the effect of the combination of the two is far greater than the effect of using them alone. At the same time, seaweed oligosaccharides, as natural chelating agents, can enhance the stability and biological activity of trace elements in plants, and seaweed oligosaccharides can ensure the stability of lignite humic acid, nitrogen, phosphorus and potassium compound fertilizers, compound amino acids, silicon dioxide, magnesium oxide, and microbial agents to a certain extent, thereby reducing the supplementation and use of fertilizers during plant growth.

[0013] 2. Adding complex amino acids to fertilizers. Amino acids and seaweed oligosaccharides can further promote the growth of plant roots, reduce the amount of fertilizer used, and promote the growth of the aboveground parts of plants. At the same time, seaweed oligosaccharides can also help ensure the stability and slow release of amino acids. Aspartic acid participates in protein synthesis in plants and provides nitrogen for growth during stressful periods. Arginine can enhance root development and is a precursor for the synthesis of endogenous plant hormones, polyamines, and can also improve the ability of crops to resist salt stress. Threonine can improve crop tolerance and resistance to insect and disease damage, while promoting the humification process, and can have a good compatibility with lignite humic acid.

[0014] 3. Under the action of seaweed oligosaccharides, silicon dioxide and magnesium oxide have good stability and slow release properties, which can gradually release silicon dioxide and magnesium oxide into the soil, playing a more lasting and effective role in treating acidified soil; at the same time, silicon dioxide can promote the formation of silicified cells in plants, thicken the cell walls on the surface of plant stems and leaves, increase the cuticle, and improve the ability of crops to prevent fruit cracking and lodging; in addition to improving acidified soil, magnesium oxide can increase soil fertility, promote microbial activity, provide the magnesium element required for plant growth, promote the synthesis of chlorophyll, and work together with seaweed oligosaccharides, complex amino acids, etc. to promote the development of plant roots and improve plant stress resistance.

[0015] 4. Supplementing microbial agents in fertilizers can significantly improve the soil environment and further play a role in slowly releasing the elements needed by crops. Among them, humic acid nitrogen-fixing bacteria, humic acid phosphate-dissolving bacteria, and humic acid potassium-dissolving bacteria can decompose the effective substances in lignite humic acid, thereby providing the elements required for plant growth; the composite composition of seaweed oligosaccharides and Bacillus subtilis performs well in promoting plant growth. Silicate colloidal Bacillus not only has the function of decomposing calcium silicate, but also controls the decomposition efficiency of calcium silicate under the action of seaweed oligosaccharides, not only treating acidified soil, but also playing a role in slowly releasing silicon. DETAILED DESCRIPTION

[0016] The present invention is described in further detail below. Example 1

[0017] A novel fertilizer containing seaweed oligosaccharides comprises the following components in parts by weight: 10 parts of seaweed oligosaccharide, seaweed oligosaccharide purchased from Shanghai Jinhaizao Biotechnology Development Co., Ltd., with a molecular weight of 10-50; 35 parts of lignite humic acid, the organic matter content of the humic acid is ≥70%, and the humic acid content is ≥10%; 25 parts of nitrogen, phosphorus and potassium compound fertilizer, in which the mass ratio of nitrogen, phosphorus and potassium is 15:5:8; 11 parts of calcium silicate, calcium silicate purchased from Aladdin; 11 parts of complex amino acids, of which aspartic acid, arginine and threonine were added in a mass ratio of 3:1:1, and aspartic acid, arginine and threonine were purchased from Shanghai Yuanye; 9 parts of silicon dioxide, silicon dioxide was purchased from Aladdin; 9 parts of magnesium oxide, magnesium oxide purchased from Aladdin; 6 parts of microbial agents, including humic acid nitrogen-fixing bacteria, humic acid phosphate-dissolving bacteria, humic acid potassium-dissolving bacteria, Bacillus subtilis, and silicate colloidal Bacillus, with a mass ratio of 1:1.5:1.5:3:3, and the microbial agents were from our research group.

[0018] The new fertilizer obtained is a mixed powder, which is convenient for storage and transportation. When used, it needs to be diluted with water. The dilution multiple in this embodiment is 400 times. It is specifically used for treating and improving acidified farmland, promoting plant root growth, and improving plant acid resistance and immunity. Example 2-3

[0019] The difference between Example 2-3 and Example 1 is that the weight parts of seaweed oligosaccharides added are different, that is, 8 parts by weight are added in Example 2, and that in Example 3, 12 parts by weight are added. Embodiment 4-5

[0020] The difference between Example 4-5 and Example 1 is that the weight parts of lignite humic acid added are different, the weight parts added in Example 4 is 30 parts, and the weight parts added in Example 5 is 40 parts. Embodiment 6-7

[0021] The difference between Example 6-7 and Example 1 is that the weight parts of the added nitrogen, phosphorus and potassium compound fertilizers are different. The weight parts added in Example 6 are 20 parts, and the weight parts added in Example 7 are 30 parts. Embodiment 8-9

[0022] The difference between Example 8-9 and Example 1 is that the weight parts of calcium silicate added are different. The weight parts added in Example 8 are 10 parts, and the weight parts added in Example 9 are 12 parts. Embodiment 10-11

[0023] The difference between Example 10-11 and Example 1 is that the weight parts of the added composite amino acids are different, that is, 10 parts by weight are added in Example 10, and 12 parts by weight are added in Example 11. Examples 12-14

[0024] The difference between Examples 12-14 and Example 1 is that the amino acids added in Example 12 are all aspartic acid, the amino acids added in Example 13 are all arginine, and the amino acids added in Example 14 are all threonine. Examples 15-16

[0025] The difference between Examples 15-16 and Example 1 is that the weight parts of silicon dioxide added are different. In Example 15, the weight parts of silicon dioxide added are 8 parts, and in Example 16, the weight parts of silicon dioxide added are 10 parts. Examples 17-18

[0026] The difference between Examples 17-18 and Example 1 is that the weight parts of magnesium oxide added are different. In Example 17, the weight parts of magnesium oxide added are 8 parts, and in Example 18, the weight parts added are 10 parts. Examples 19-20

[0027] The difference between Examples 19-20 and Example 1 is that the weight parts of the microbial agents added are different. The weight parts added in Example 19 are 4 parts, and the weight parts added in Example 20 are 8 parts. Examples 21-22

[0028] The difference between Example 21-22 and Example 1 is that the mass ratio of each strain in the microbial agent is different. In Example 21, the mass ratio of humic acid nitrogen-fixing fertilizer, humic acid phosphate-dissolving fertilizer, humic acid potassium-dissolving fertilizer, Bacillus subtilis, and silicate colloidal Bacillus is 1:1:1:2:2, and the weight ratio in Example 22 is 1:2:2:4:4. Embodiment 23-24

[0029] The difference between Examples 23-24 and Example 1 is that the dilution multiples of the new fertilizer are different. The dilution multiple in Example 23 is 300 times, and the dilution multiple in Example 24 is 500 times. Embodiment 25

[0030] The difference between Example 25 and Example 1 is that no complex amino acid is added. Embodiment 26

[0031] The difference between Example 26 and Example 1 is that no silicon dioxide is added. Embodiment 27

[0032] The difference between Example 27 and Example 1 is that magnesium oxide is not added. Embodiment 28

[0033] The difference between Example 28 and Example 1 is that no microbial agent is added. Embodiment 29

[0034] The difference between Example 29 and Example 1 is that the microbial agent does not include humic acid nitrogen-fixing fertilizer, humic acid phosphate-dissolving fertilizer, and humic acid potassium-dissolving fertilizer. Embodiment 30

[0035] The difference between Example 30 and Example 1 is that the microbial agent does not include Bacillus subtilis. Embodiment 31

[0036] The difference between Example 31 and Example 1 is that the microbial inoculant does not include silicate colloid Bacillus. Comparative Example 1

[0037] The difference between Comparative Example 1 and Example 1 is that no seaweed oligosaccharide is added. Comparative Example 2

[0038] The difference between Comparative Example 2 and Example 1 is that no calcium silicate is added. Comparative Example 3

[0039] The difference between Comparative Example 3 and Example 1 is that lignite humic acid is not added. Comparative Example 4

[0040] The difference between Comparative Example 4 and Example 1 is that only nitrogen, phosphorus and potassium compound fertilizers of the same mass and dilution multiple are used. Field trial 1

[0041] 1. Test crops and varieties: Crop: Rice Variety: Jiafengyou No. 3 2. Test location: Tenghui Family Farm, Pujiang County, Hongshan Village, Tanxi Town, Pujiang County 3. Test period: March 2023 to December 2023 (no serious natural disasters occurred during the entire test) 4. Experimental design and methods: Control group: Comparative Example 4, planting according to farmers' habits.

[0042] Test group: Example 1, farmers' habitual planting.

[0043] To a certain extent, the experimental group had thicker stems and more vigorous tillering than the control group, and the rice fruit set rate and 1000-grain weight increased. Compared with the control group, the 1000-grain weight of rice in the experimental group increased by 1.2% (Table 1). The rice yield of the experimental group increased compared with the control group, and the average increase in rice yield in the experimental group was 17.8% (Table 2).

[0044] Table 1

[0045] Table 2 Field trial 2

[0046] 1. Test crops and varieties: Crop: Rice Variety: Jiafengyou No. 3 2. Experimental location: Pujiang Shangshan Cultural Site 3. Test period: March 2023 to November 2023 (no serious natural disasters occurred during the entire test) 4. Experimental design and methods: Control group: Comparative Example 4, planting according to farmers' habits.

[0047] Test group: Example 1, farmers' habitual planting.

[0048] Compared with the control group with conventional fertilization, the rice stalks in the experimental group were thicker, tillering was vigorous, and the rice fruiting rate and 1000-grain weight increased. Compared with the conventional fertilization (control group), the 1000-grain weight of rice in the experimental group increased by 7.3% (Table 3). Compared with the control group with conventional fertilization, the rice yield of the experimental group increased. Compared with the conventional fertilization (control group), the increase in the experimental group was 16.3% (Table 4).

[0049] Table 3

[0050] Table 4 Results Analysis

[0051] 1. Compared with Examples 1-24, all of them can effectively improve the effect of soil acidification, and are beneficial to the root growth of rice and improve the immunity and acid resistance of plants.

[0052] 2. Comparing Example 1, Examples 12-14 and Example 25, Example 25 did not add the composite amino acid, and the growth of rice was obviously not as good as that of Example 1, and the acid resistance and resistance to insect pests and diseases were also not as good as those of Example 1. The main reason may be that aspartic acid in the composite amino acid participates in the synthesis of proteins in the plant body and provides nitrogen for growth during stress periods; arginine can enhance root development, is a precursor for the synthesis of plant endogenous hormone polyamines, and can also improve the ability of crops to resist salt stress; threonine can improve the tolerance of crops and resistance to insect pests and diseases, and promote the humification process, and can have a good compatibility with lignite humic acid.

[0053] 3. Comparing Example 1 with Example 26, Example 26 did not add silicon dioxide, which had a certain effect on the treatment of acidified soil and the ability of crops to resist lodging, and also had a certain effect on the quality of crops. This may be because silicon dioxide can promote the formation of silicified cells in plants, thicken the cell walls on the surface of plant stems and leaves, increase the cuticle, and improve the ability of crops to prevent fruit cracking and resist lodging.

[0054] 4. Comparing Example 1 with Example 27, Example 27 did not add magnesium oxide, which had a certain effect on the treatment of acidified soil and the growth and development of crop roots. This may be because in addition to improving acidified soil, magnesium oxide can increase soil fertility and promote microbial activity, and can also provide the required magnesium element for plant growth and promote the synthesis of chlorophyll. It works together with seaweed oligosaccharides, complex amino acids, etc. to promote the development of plant roots and improve plant stress resistance.

[0055] 5. Comparing Example 1 with Example 28, Example 28 does not add microbial agents, and the utilization of lignite humic acid is affected to a certain extent, and it also has a certain impact on the growth of crops and the treatment of acidified soil. This may be because humic acid nitrogen-fixing bacteria, humic acid phosphate-dissolving bacteria, and humic acid potassium-dissolving bacteria can decompose the effective substances in lignite humic acid, thereby providing the required elements for plant growth; the composite composition of seaweed oligosaccharides and Bacillus subtilis performs well in promoting plant growth. Silicate colloidal Bacillus not only has the function of decomposing calcium silicate, but also controls the decomposition efficiency of calcium silicate under the action of seaweed oligosaccharides, not only treats acidified soil, but also plays a role in slowly releasing silicon.

[0056] 6. Comparing Example 1 with Example 29, the microbial agent in Example 29 does not include humic acid nitrogen-fixing fertilizer, humic acid phosphate-dissolving fertilizer, and humic acid potassium-dissolving fertilizer. The utilization of lignite humic acid is affected to a certain extent, and the growth of crops is also affected to a certain extent. This may be because humic acid nitrogen-fixing bacteria, humic acid phosphate-dissolving bacteria, and humic acid potassium-dissolving bacteria can decompose the effective substances in lignite humic acid, thereby providing the required elements for plant growth.

[0057] 7. Comparing Example 1 with Example 30, the microbial agent in Example 30 does not include Bacillus subtilis, which has a certain effect on the growth of crops. This may be because the composite composition of seaweed oligosaccharides and Bacillus subtilis performs well in promoting plant growth.

[0058] 8. Comparing Example 1 with Example 31, the microbial agent of Example 31 does not include silicate colloidal Bacillus, which has a certain impact on the growth of crops and the treatment of acidified soil. This may be because silicate colloidal Bacillus not only has the function of decomposing calcium silicate, but also controls the decomposition efficiency of calcium silicate under the action of seaweed oligosaccharides, which not only treats the acidified soil, but also plays a role in slowly releasing silicon.

[0059] 9. Comparing Example 1 with Comparative Example 1, Comparative Example 1 does not add seaweed oligosaccharides, which not only has a greater impact on the growth and yield quality of crops and the treatment of acidified soil, but also requires more fertilizer to be added in the subsequent growth stage of crops. This may be because seaweed oligosaccharides can not only promote the growth of plant roots and improve photosynthesis efficiency, but also enhance the stress resistance of plants and improve their immunity, thereby improving quality and yield; for soil, seaweed oligosaccharides can be combined with calcium silicate to improve acidified soil, and the effect of the combination of the two is much greater than the effect of single use. At the same time, seaweed oligosaccharides, as natural chelating agents, can enhance the stability and biological activity of trace elements in plants, and seaweed oligosaccharides can ensure the stability of lignite humic acid, nitrogen, phosphorus and potassium compound fertilizers, compound amino acids, silicon dioxide, magnesium oxide, and microbial agents to a certain extent, thereby reducing the supplementation and use of fertilizers during plant growth.

[0060] 10. Comparing Example 1 with Comparative Example 2, the comparative example 2 did not add calcium silicate, which had a relatively large impact on the treatment of acidified soil. This may be because seaweed oligosaccharides can play a role in improving acidified soil after being combined with calcium silicate.

[0061] 11. Comparing Example 1 with Comparative Example 3, no lignite humic acid was added in Comparative Example 3, which had a certain impact on plant growth, because no lignite humic acid provided the nutrients required for plant growth.

[0062] 12. Comparing Example 1 with Comparative Example 4, the fertilizer used in Comparative Example 4 is different. It only uses nitrogen, phosphorus and potassium compound fertilizers of the same mass and dilution multiple, which not only fails to play a role in treating acidified soil, but also the plant growth, yield and quality of the fertilizer used in Comparative Example 4 are far inferior to those in Example 1. And after the subsequent addition of nitrogen, phosphorus and potassium compound fertilizers, the plant growth, yield and quality are still far inferior to those in Example 1.

[0063] This specific embodiment is merely an explanation of the present application and is not a limitation of the present application. After reading this specification, a person skilled in the art may make non-creative modifications to the present embodiment as needed, but such modifications are protected by the Patent Law as long as they are within the scope of the present application.

Claims

1. A novel fertilizer containing seaweed oligosaccharides, characterized in that: The invention comprises the following components in parts by weight: 8-12 parts of seaweed oligosaccharide; 30-40 parts of lignite humic acid; 20-30 parts of nitrogen, phosphorus and potassium compound fertilizer; and 10-12 parts of calcium silicate.

2. The novel fertilizer containing seaweed oligosaccharides according to claim 1, characterized in that: The novel fertilizer also includes 10 to 12 parts of complex amino acids.

3. The novel fertilizer containing seaweed oligosaccharides according to claim 2, characterized in that: The complex amino acids include aspartic acid, arginine and threonine.

4. The novel fertilizer containing seaweed oligosaccharides according to claim 1, characterized in that: The novel fertilizer also includes 8-10 parts of silicon dioxide and 8-10 parts of magnesium oxide.

5. The novel fertilizer containing seaweed oligosaccharides according to claim 1, characterized in that: The novel fertilizer also includes 4 to 8 parts of microbial agents.

6. The novel fertilizer containing seaweed oligosaccharides according to claim 5, characterized in that: The microbial agent includes humic acid nitrogen-fixing bacteria, humic acid phosphate-dissolving bacteria, humic acid potassium-dissolving bacteria, Bacillus subtilis, and silicate colloidal Bacillus.

7. The novel fertilizer containing seaweed oligosaccharides according to claim 6, characterized in that: The mass ratio of the humic acid nitrogen-fixing bacterial fertilizer, the humic acid phosphate-dissolving bacterial fertilizer, the humic acid potassium-dissolving bacterial fertilizer, the Bacillus subtilis, and the silicate colloidal Bacillus is 1:(1-2):(1-2):(2-4):(2-4).

8. Application of a new type of fertilizer containing seaweed oligosaccharides in acidified farmland.

9. Application of a new type of fertilizer containing seaweed oligosaccharides in promoting plant root growth and improving plant acid resistance and immunity.

10. Use of the novel fertilizer containing seaweed oligosaccharides according to claim 8 or 9 in acidified farmland, characterized in that: Apply the new fertilizer to the soil at a rate of 60-100 kg / mu.

Images