CN112521203A - Seaweed fertilizer and preparation method thereof - Google Patents
Seaweed fertilizer and preparation method thereof Download PDFInfo
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- CN112521203A CN112521203A CN202011570335.9A CN202011570335A CN112521203A CN 112521203 A CN112521203 A CN 112521203A CN 202011570335 A CN202011570335 A CN 202011570335A CN 112521203 A CN112521203 A CN 112521203A
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- C—CHEMISTRY; METALLURGY
- C05—FERTILISERS; MANUFACTURE THEREOF
- C05D—INORGANIC FERTILISERS NOT COVERED BY SUBCLASSES C05B, C05C; FERTILISERS PRODUCING CARBON DIOXIDE
- C05D1/00—Fertilisers containing potassium
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- C—CHEMISTRY; METALLURGY
- C05—FERTILISERS; MANUFACTURE THEREOF
- C05G—MIXTURES OF FERTILISERS COVERED INDIVIDUALLY BY DIFFERENT SUBCLASSES OF CLASS C05; MIXTURES OF ONE OR MORE FERTILISERS WITH MATERIALS NOT HAVING A SPECIFIC FERTILISING ACTIVITY, e.g. PESTICIDES, SOIL-CONDITIONERS, WETTING AGENTS; FERTILISERS CHARACTERISED BY THEIR FORM
- C05G5/00—Fertilisers characterised by their form
- C05G5/20—Liquid fertilisers
Abstract
The invention provides a seaweed fertilizer and a preparation method thereof. The brown algae extract is a main functional component of the existing seaweed fertilizer, potassium hydroxide, potassium carbonate and a metal chelating agent are used for forming a degradation solution, brown algae and cod skin leftovers are digested at high temperature, and a digestion clear solution obtained through separation is mixed with a culture mother solution after microalgae separation is cultured, so that the seaweed fertilizer is obtained. On one hand, the degradation condition is utilized to realize the common degradation of the seaweed and the fish leftovers, and the components such as protein peptide, amino acid and the like in the brown seaweed extract are improved; on the other hand, the chelating agent is adopted to promote the conversion of calcium alginate into alginic acid, so that the extraction rate of alginic acid is improved to 95-99%, and meanwhile, the water-soluble metal element components such as chelated calcium, magnesium and the like in the brown algae extract are improved; and the mother liquor recovered by the microalgae can be fully utilized, and the microalgae active ingredients in the brown algae extract can be improved. The seaweed fertilizer has remarkable effects of promoting crop rooting, growth, yield increase, stress resistance and the like.
Description
Technical Field
The invention belongs to the field of seaweed processing, and particularly relates to a seaweed fertilizer and a preparation method thereof.
Background
The seaweed fertilizer is a biological fertilizer taking seaweed extract as a functional component, and has good practical application effects, such as improvement of stress resistance, yield increase, improvement of product quality and the like. The existing methods for preparing the seaweed extract comprise alkali degradation, acid degradation, enzyme degradation, physical extraction and the like, whether the seaweed fertilizer is qualified or not is judged according to the content of alginic acid in the extract, and because the alginic acid subjected to alkali degradation and acid degradation has high extraction rate, polysaccharide, protein and growth hormone in seaweed can be well reserved, the method is easy to realize, the cost is low and the like, and becomes the extraction method mainly adopted in the current seaweed processing industry. Alginic acid is present in seaweed in the form of calcium alginate, which functions in fertilizers provided that it is converted into water-soluble potassium alginate. The principle of acid degradation extraction is that calcium alginate is converted into alginic acid by acid, and then alginic acid is converted into potassium alginate by an alkali neutralization mode; the alkaline degradation extraction principle is that potassium carbonate reacts with calcium alginate to be converted into potassium alginate and calcium carbonate precipitate. In the production application of the two methods, the alginic acid extraction rate of the seaweed is 70-90%, a considerable part of alginic acid cannot be extracted, and polyvalent metal elements such as calcium, magnesium and the like in the seaweed can be converted into precipitates and cannot be extracted.
Patent CN101580852A provides a method for preparing algae essence by enzymolysis, which comprises the steps of soaking crushed and desanded dry algae in water and processing the dry algae by a colloid mill, decomposing cellulose in the algae by cellulase to improve the extraction rate of the algae essence, and degrading high molecular weight alginic acid in the algae into low molecular weight alginic acid by using alginate lyase to reduce the damage of effective components in the algae. However, the method has high cost, single enzyme degradation product and much lower extraction rate of the alginic acid than chemical extraction.
Patent CN104829275A provides a production process of liquid seaweed fertilizer and the liquid seaweed fertilizer, and the production process of the liquid seaweed fertilizer sequentially comprises the following steps: (1) cleaning giant kelp, and pulverizing in a pulverizer; (2) the crushed product is thrown into a pressure tank; (3) increasing the pressure of the pressure tank to 0.8MPa, and reducing the pressure of the pressure tank to 0Pa within 1-3 seconds, so that the cell wall of the kelp is burst in the pressure difference, and active cytoplasm and cell sap are released; (4) and filtering the product in the pressure tank to remove insoluble substances, wherein the filtered green liquid is the liquid seaweed fertilizer. The process has the advantages of no need of heating and freezing, no addition of any chemical agent, simple and rapid operation, and maximally retained nutrients and active substances in the kelp. However, this process is a physical extraction method, and cannot sufficiently extract components such as protein, alginic acid, and polysaccharide.
Patent CN1229778A provides a method for producing functional seaweed fertilizer, which uses potassium hydroxide to digest seaweed, and the obtained seaweed digest is used to supplement amino acids with fish hydrolysate. However, in this method, potassium hydroxide does not sufficiently react with calcium alginate in the seaweed, resulting in low extraction rate of alginic acid. The technical route of alkali degradation needs to adopt potassium carbonate, and potassium carbonate and calcium alginate are utilized to fully extract and convert the potassium alginate.
Therefore, the following three problems are commonly present in the preparation of the seaweed fertilizer.
Firstly, the existing preparation technology of brown algae extract adopts means of acid degradation, alkali degradation, enzyme degradation, physical extraction and the like, but in production application, the extraction rate of alginic acid is generally 10% -90%, and the extraction rate is low.
Secondly, the prior brown algae extract is better in fertilizer efficiency after being compounded with fish protein, and is accepted in the seaweed fertilizer industry; however, the use cost of the fish protein used in the seaweed fertilizer industry is high, and fish protein production enterprises have the problem that the fishy smell seriously damages the environment.
And thirdly, the content of active ingredients of the seaweed is reduced due to loss or damage in the extraction process, but in recent years, artificial culture of microalgae is started, and the microalgae contains rich protein, growth factors and the like, which have a good effect of promoting the growth of plants, but culture mother liquor after the microalgae is separated is generally discarded.
Disclosure of Invention
The invention provides an alga fertilizer and a preparation method thereof, which are used for solving the problem of low alginic acid extraction rate in the existing alga fertilizer preparation and further improving active ingredients in the alga fertilizer.
In order to realize the purpose, the invention provides a preparation method of a seaweed fertilizer, which comprises the following steps:
preparing a solution for degradation, namely mixing potassium carbonate, a chelating agent and potassium hydroxide in a reactor, and adding water to prepare a solution for degradation;
preparing an extracting solution, namely putting seaweed and fish raw materials into the degradation solution in a reactor, carrying out alkaline hydrolysis reaction, filtering and separating the degraded materials to obtain an extracting solution, and adjusting the pH value of the extracting solution to 6-10 by using an acid neutralizing agent; and
and compounding a microalgae recovery mother solution, namely uniformly mixing the extracting solution and the microalgae recovery mother solution to obtain the seaweed fertilizer.
Further, in the step of preparing a solution for degradation, the weight ratio of the potassium carbonate, the chelating agent, the potassium hydroxide, and the water is (10-20): (3-30): (5-40): (500-2000).
Further, the chelating agent is a chelating agent capable of binding calcium and magnesium, such as EDTA and phosphates.
Further, the seaweed includes brown algae and other algae that can be degraded according to the methods of the present patent; the fish raw material comprises leftovers of various fishes such as cod skin.
Further, the ratio of the fish raw material to the seaweed is (1-30): 100.
further, the temperature of the alkaline hydrolysis reaction is kept between 80 ℃ and 120 ℃, and the reaction time is 6 to 24 hours.
Further, the weight ratio of the seaweed, the fish raw material, the potassium carbonate, the chelating agent, the potassium hydroxide and the water is 1: (1-20): (10-20): (3-30): (5-40): (500-2000).
Further, in the step of compounding the microalgae recovery mother liquor, the mixing volume ratio of the extracting solution to the microalgae recovery mother liquor is (3-6): 1; the microalgae recovery mother liquor is a recovery liquor of the culture mother liquor for culturing the algae after the algae are separated.
The invention also provides the seaweed fertilizer which is prepared by the preparation method of the seaweed fertilizer.
The seaweed fertilizer and the preparation method thereof have the beneficial effects that on one hand, the seaweed and fish leftovers are degraded together by using degradation conditions, and the components such as protein peptide and amino acid in the brown seaweed extract are improved; on the other hand, the chelating agent is adopted to promote the conversion of calcium alginate into alginic acid, so that the extraction rate of alginic acid is improved to 95-99%, and meanwhile, the water-soluble metal element components such as chelated calcium, magnesium and the like in the brown algae extract are improved; and the mother liquor recovered by the microalgae can be fully utilized, and the microalgae active ingredients in the brown algae extract can be improved. The seaweed fertilizer has remarkable effects of promoting crop rooting, growth, yield increase, stress resistance and the like.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings used in the description of the embodiments will be briefly introduced below. It is obvious that the drawings in the following description are only some embodiments of the application, and that for a person skilled in the art, other drawings can be derived from them without inventive effort.
FIG. 1 is a flow chart of a preparation method of the seaweed fertilizer according to the embodiment of the invention.
Detailed Description
The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application. The present invention may, however, be embodied in many different forms of embodiment, and the scope of the present invention should not be construed as limited to the embodiment set forth herein, but rather construed as being limited only by the following description of the embodiment.
Reference herein to "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment can be included in at least one embodiment of the application. The appearances of the phrase in various places in the specification are not necessarily all referring to the same embodiment, nor are separate or alternative embodiments mutually exclusive of other embodiments. It is explicitly and implicitly understood by one skilled in the art that the embodiments described herein can be combined with other embodiments.
The invention provides a preparation method of a seaweed fertilizer, which comprises the following steps:
s1, preparing a solution for degradation, namely mixing potassium carbonate, a chelating agent and potassium hydroxide in a reactor, and adding water to prepare the solution for degradation;
s2, preparing an extracting solution, namely putting seaweed and fish raw materials into the degradation solution in the reactor, carrying out alkaline hydrolysis reaction, filtering and separating the degraded materials to obtain an extracting solution, and adjusting the pH value of the extracting solution to 6-10 by using an acid neutralizing agent; and
s3, compounding a microalgae recovery mother solution, and uniformly mixing the extracting solution and the microalgae recovery mother solution to obtain the seaweed fertilizer.
In this example, in the step of preparing a solution for degradation, the weight ratio of the potassium carbonate, the chelating agent, the potassium hydroxide, and the water is (10 to 20): (3-30): (5-40): (500-2000).
In this embodiment, the chelating agent is EDTA, phosphate, or other chelating agents capable of binding with calcium and magnesium. The chelating agent serves two functions: firstly, the extraction rate of alginic acid is improved, and the principle is that the conversion of calcium alginate into alginic acid is promoted; secondly, chelate metal elements such as chelate calcium, magnesium and the like are obtained by conversion, and the principle is to avoid the system from generating calcium carbonate and magnesium carbonate precipitates. The chelating agent can increase the extraction rate of alginic acid.
In this example, the chelating agent includes disodium ethylenediaminetetraacetic acid (EDTA-2 Na).
In this example, the algae include brown algae and other algae that can be degraded according to the disclosed methods; the fish raw material comprises leftovers of various fishes such as cod skin. The fish raw material contains fish protein, seaweed and the fish raw material are subjected to co-degradation, and the seaweed degradation condition is utilized to realize utilization of the fish raw material such as cod skin.
In this embodiment, the ratio of the fish raw material to the seaweed is (1-30): 100.
in the embodiment, the temperature of the alkaline hydrolysis reaction is kept between 80 and 120 ℃, and the reaction time is 6 to 24 hours.
In this embodiment, the weight ratio of the seaweed, the fish raw material, the potassium carbonate, the chelating agent, the potassium hydroxide, and the water is 1: (1-20): (10-20): (3-30): (5-40): (500-2000).
In this embodiment, in the step of compounding the microalgae recovery mother liquor, the mixing volume ratio of the extracting solution to the microalgae recovery mother liquor is (3-6): 1, preferably 5: 1; the microalgae recovery mother liquor is a recovery liquor of the culture mother liquor for culturing the algae after the algae are separated.
The brown algae extract is a main functional component of the existing seaweed fertilizer, potassium hydroxide, potassium carbonate and a metal chelating agent are used for forming a degradation solution, brown algae and cod skin leftovers are digested at high temperature, and a digestion clear solution obtained through separation is mixed with a culture mother solution after microalgae separation is cultured, so that the seaweed fertilizer is obtained. On one hand, the degradation condition is utilized to realize the common degradation of the seaweed and the fish leftovers, and the components such as protein peptide, amino acid and the like in the brown seaweed extract are improved; on the other hand, the chelating agent is adopted to promote the conversion of calcium alginate into alginic acid, so that the extraction rate of alginic acid is improved to 95-99%, and meanwhile, the water-soluble metal element components such as chelated calcium, magnesium and the like in the brown algae extract are improved; and the mother liquor recovered by the microalgae can be fully utilized, and the microalgae active ingredients in the brown algae extract can be improved.
The invention also provides the seaweed fertilizer which is prepared by the preparation method of the seaweed fertilizer.
The seaweed fertilizer and the preparation method thereof have the beneficial effects that on one hand, fishy smell in the preparation of the seaweed fertilizer can be removed by utilizing the seaweed, on the other hand, the extraction rate of the seaweed acid can be improved to 95-99%, the seaweed fertilizer can be mixed with the culture mother liquor after the separation of the microalgae to be used as the seaweed fertilizer, and the mother liquor can be fully recovered by utilizing the microalgae.
Specifically, the following specific examples and comparative examples 1 to 3 are provided to compare and verify the beneficial effects of the present application, respectively.
Example for the application
1. Preparing a potassium carbonate-chelating agent-potassium hydroxide extraction solution: groundwater 3m350kg of potassium hydroxide, 50kg of potassium carbonate and 22kg of EDTA-2Na are stirred and dissolved.
2. The brown algae and fish raw materials are jointly digested and degraded: 300kg of Ascophyllum nodosum and 15kg of cod skin are put into a reactor to carry out alkaline hydrolysis reaction, and the temperature is kept above 90 ℃. After reaction for more than 10 hours, the degraded materials are filtered and separated to obtain clear liquid of 2.5m375kg of monopotassium phosphate is added into the clear liquid, and the pH of the clear liquid is reduced from 11 to 7.5.
3. Compounding microalgae recovery mother liquor (light green in appearance): 2.5m of extract3And microalgae recovery mother liquor of 0.5m3And (4) uniformly mixing.
As a result:
1. the final seaweed extract has the characteristic indexes that: alginic acid: 2%, algal polysaccharide: 4%, protein content: 0.75%, calcium: 0.05 percent; the extraction rate of the alginic acid reaches 99 percent.
Comparative example 1-calcium chelator Effect
1. Preparing a potassium carbonate-potassium hydroxide extraction solution: groundwater 3m350kg of potassium hydroxide and 50kg of potassium carbonate are stirred and dissolved.
2. The brown algae and fish raw materials are jointly digested and degraded: 300kg of Ascophyllum nodosum and 15kg of cod skin are put into a reactor to carry out alkaline hydrolysis reaction, and the temperature is kept above 90 ℃. After reaction for more than 10 hours, the degraded materials are filtered and separated to obtain clear liquid of 2.1m375kg of monopotassium phosphate is added into the clear liquid, and the pH is reduced from 11 to 7.5.
3. Compounding microalgae recovery mother liquor: 2.1m of extract3And microalgae recovery mother liquor of 0.42m3And (4) uniformly mixing.
As a result:
1. the final characteristic indexes of the seaweed extract are as follows: alginic acid: 2%, algal polysaccharide: 4%, protein content: 0.75%, calcium: 0.05 percent; the extraction rate of the alginic acid reaches 84 percent.
2. Compared with the comparative example 1 and the embodiment of the application, the separation clear liquid is reduced when EDTA-2Na is not added, and the reason is analyzed: on one hand, the calcium chelating agent has the functions of reducing the viscosity of the seaweed liquid and improving the separation effect (in the production process, the final part of solution is sticky and turbid and is generally used as a waste material when the degraded seaweed material in the reactor is discharged and filtered). On the other hand, EDTA-2Na can promote the alkali soluble part in seaweed to be better dissolved, such as calcium alginate.
Comparative example 2-Effect of Fish protein degradation
1. Preparing a potassium carbonate-potassium hydroxide extraction solution: groundwater 3m350kg of potassium hydroxide, 50kg of potassium carbonate and 22kg of EDTA-2Na are stirred and dissolved.
2. Digestion and degradation of brown algae: 300kg of Ascophyllum nodosum is put into a reactor to carry out alkaline hydrolysis reaction, and the temperature is kept above 90 ℃. After reaction for more than 10 hours, the degraded materials are filtered and separated to obtain clear liquid of 2.5m375kg of monopotassium phosphate is added into the clear liquid, and the pH is reduced from 11 to 7.5.
3. Compounding microalgae recovery mother liquor: 2.5m of extract3And microalgae recovery mother liquor of 0.5m3And (4) uniformly mixing.
As a result:
1. the final characteristic indexes of the seaweed extract are as follows: alginic acid: 2%, algal polysaccharide: 4%, protein content: 0.40%, calcium: 0.05 percent; the extraction rate of the alginic acid reaches 99 percent.
2. Compared with the proportion of the case 2 and the embodiment case, the protein in the system is reduced by 10.5kg, which shows that the extraction rate of the fish protein in the embodiment case reaches 70%.
Example 3 microalgae recovery mother liquor Effect
1. Preparing a potassium carbonate-chelating agent-potassium hydroxide extraction solution: groundwater 3m350kg of potassium hydroxide, 50kg of potassium carbonate and 22kg of EDTA-2Na are stirred and dissolved.
2. The brown algae and fish raw materials are jointly digested and degraded: 300kg of Ascophyllum nodosum and 15kg of cod skin are put into a reactor to carry out alkaline hydrolysis reaction, and the temperature is kept above 90 ℃. After reaction for more than 10 hours, the degraded materials are filtered and separated to obtain clear liquid of 2.5m375kg of monopotassium phosphate is added into the clear liquid, and the pH is reduced from 11 to 7.5.
As a result:
1. the final characteristic indexes of the seaweed extract are as follows: alginic acid: 2%, algal polysaccharide: 4%, protein content: 0.75%, calcium: 0.05 percent; the extraction rate of the alginic acid reaches 99 percent.
Further, the final extract and the underground water of the embodiment, the comparative example 2 and the comparative example 3 are compared and applied to test, and strawberries, celery and small tomatoes which grow well and are uniform in growth are selected for fertilization. Groundwater was used as a blank control: 2.5m of extract3And ground water 0.5m3And (4) uniformly mixing.
The experimental method comprises the following steps: spraying leaves, spraying for 1 time in seedling stage, diluting 2000 times, spraying for 1 time in fruit setting stage, diluting 10000 times, and repeating for 3 times at 15 days interval; 30 strawberries are a repeat region, 30 celery are 1 repeat region, and 30 tomatoes are a repeat region. The growth vigor is visually observed and the average weight of the single fruit is counted.
The experimental result shows that the seaweed liquid is added with the fish protein component, so that the yield increasing effect is obvious; the microalgae mother liquor component has a good effect of promoting the growth of crops. The seaweed fertilizer has remarkable effects of promoting crop rooting, growth, yield increase, stress resistance and the like.
The results are shown in the following table:
therefore, on one hand, the method realizes the joint degradation of the seaweed and the fish leftovers by using degradation conditions, improves the contents of protein peptide, amino acid and the like in the brown seaweed extract, avoids the content reduction caused by the loss or damage of seaweed active ingredients in the extraction process, and can remove the fish smell in the preparation of the seaweed fertilizer; on the other hand, the chelating agent is adopted to promote the conversion of calcium alginate into alginic acid, the extraction rate of alginic acid is improved to 95-99%, and simultaneously the water-soluble metal element components such as chelated calcium, magnesium and the like in the brown algae extract are improved, wherein the chelating agent plays two roles, namely, the extraction rate of alginic acid is improved, the principle is to promote the conversion of calcium alginate into alginic acid, and the principle is to avoid the generation of calcium carbonate and magnesium carbonate precipitates; and the mother liquor recovered by the microalgae can be fully utilized, and the microalgae active ingredients in the brown algae extract can be improved. The seaweed fertilizer has remarkable effects of promoting crop rooting, growth, yield increase and stress resistance, realizes that the seaweed fertilizer is mixed with culture mother liquor after microalgae separation and then can fully utilize microalgae to recover the mother liquor.
The seaweed fertilizer and the preparation method thereof provided by the embodiment of the application are described in detail, the principle and the embodiment of the application are explained by applying specific examples, and the description of the embodiment is only used for helping to understand the method and the core idea of the application; meanwhile, for those skilled in the art, according to the idea of the present application, there may be variations in the specific embodiments and the application scope, and in summary, the content of the present specification should not be construed as a limitation to the present application.
Claims (10)
1. The preparation method of the seaweed fertilizer is characterized by comprising the following steps:
preparing a solution for degradation, namely mixing potassium carbonate, a chelating agent and potassium hydroxide in a reactor, and adding water to prepare a solution for degradation;
preparing an extracting solution, namely putting seaweed and fish raw materials into the degradation solution in a reactor, carrying out alkaline hydrolysis reaction, filtering and separating the degraded materials to obtain an extracting solution, and adjusting the pH value of the extracting solution to 6-10 by using an acid neutralizing agent; and
and compounding a microalgae recovery mother solution, namely uniformly mixing the extracting solution and the microalgae recovery mother solution to obtain the seaweed fertilizer.
2. The method for preparing seaweed fertilizer according to claim 1, wherein in the step of preparing the degradation solution, the weight ratio of the potassium carbonate, the chelating agent, the potassium hydroxide and the water is (10-20): (3-30): (5-40): (500-2000).
3. The method for preparing the seaweed fertilizer as claimed in claim 1, wherein the chelating agent is an EDTA or phosphate chelating agent.
4. The method for preparing a seaweed fertilizer as claimed in claim 1, wherein the chelating agent comprises disodium ethylenediaminetetraacetate.
5. The method for preparing seaweed fertilizer according to claim 1, wherein in the step of preparing the extracting solution, the seaweed comprises brown algae; the fish material comprises cod skin.
6. The method for preparing seaweed fertilizer according to claim 1, wherein in the step of preparing the extracting solution, the ratio of the fish raw material to the seaweed is (1-30): 100.
7. the method for preparing seaweed fertilizer as claimed in claim 1, wherein in the step of preparing the extracting solution, the temperature of the alkaline hydrolysis reaction is maintained at 80-120 ℃ and the reaction time is 6-24 hours.
8. The method for preparing seaweed fertilizer according to claim 1, wherein in the step of preparing the extracting solution, the weight ratio of the seaweed, the fish raw material, the potassium carbonate, the chelating agent, the potassium hydroxide and the water is 1: (1-20): (10-20): (3-30): (5-40): (500-2000).
9. The method for preparing the seaweed fertilizer as claimed in claim 1, wherein in the step of compounding the microalgae recovery mother liquor, the mixing volume ratio of the extracting solution to the microalgae recovery mother liquor is (3-6): 1; the microalgae recovery mother liquor is a recovery liquor of the culture mother liquor for culturing the algae after the algae are separated.
10. An algal fertilizer, characterized by being prepared by the preparation method of the algal fertilizer of claim 1.
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| CN104876709A (en) * | 2015-05-18 | 2015-09-02 | 国家海洋局第三海洋研究所 | Method for preparing seaweed liquid fertilizer from seaweed |
| CN105669258A (en) * | 2016-01-06 | 2016-06-15 | 济南开发区星火科学技术研究院 | Resource utilization method for oil-producing microbial fermentation culture liquid |
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| CN106588257A (en) * | 2016-11-10 | 2017-04-26 | 凤台县牧碧农业发展有限公司 | High efficient foliar fertilizer utilizing algae culture complexing and preparation method thereof |
| CN107162690A (en) * | 2017-06-06 | 2017-09-15 | 威海温喜生物科技有限公司 | A kind of preparation method of the tomato special fertilizer containing Fish protein and algal polysaccharides |
| CN108822576A (en) * | 2018-06-04 | 2018-11-16 | 福州大学 | A method of extracting pigment from alginate pigment gel |
| CN108794160A (en) * | 2018-06-22 | 2018-11-13 | 中国热带农业科学院农产品加工研究所 | A kind of soil can repair the preparation method of agricultural biological bacterial manure |
| CN109722388A (en) * | 2019-03-13 | 2019-05-07 | 厦门大学 | Microalgae commensalism bacterium isolation medium, separation method and the crucial bacterium high-throughput screening method for influencing micro algae growth |
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