CN112679277A - Seaweed liquid chelate fertilizer and preparation method thereof - Google Patents
Seaweed liquid chelate fertilizer and preparation method thereof Download PDFInfo
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- CN112679277A CN112679277A CN202011580824.2A CN202011580824A CN112679277A CN 112679277 A CN112679277 A CN 112679277A CN 202011580824 A CN202011580824 A CN 202011580824A CN 112679277 A CN112679277 A CN 112679277A
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Abstract
The invention provides a seaweed liquid chelate fertilizer and a preparation method thereof, and the preparation method comprises the steps of pulping fresh kelp to prepare kelp pulp, adding alginate lyase liquid, cellulose, pectinase, boric acid, calcium nitrate tetrahydrate, magnesium nitrate hexahydrate and dipotassium hydrogen phosphate, stirring at constant temperature for enzymolysis and chelation, adding a surfactant, heating and keeping the temperature for a period of time, and naturally cooling; according to the invention, mannitol is used for chelating boric acid to produce a complex with higher stability, so that the problem of unnecessary loss of mannitol in the processes of enzymolysis and bacterial decomposition in the production process of the seaweed fertilizer is effectively reduced, and meanwhile, more fertilizer metal ions are chelated by the retained mannitol, so that the production time is shortened, and the production efficiency is improved; the invention utilizes the process of chelating metal ions by the seaweed extract to concentrate into one step, simultaneously carries out enzymolysis and chelation, and utilizes monosaccharide and polysaccharide in the enzymolysis liquid to chelate metal ions to the maximum extent through long-time chelation, thereby improving the chelating rate and increasing the fertility.
Description
Technical Field
The invention belongs to the technical field of seaweed fertilizer production, and particularly relates to a seaweed liquid chelated fertilizer and a preparation method thereof.
Background
In recent years, the development of seaweed fertilizers is rapid in China, and the high fertilizer efficiency of the seaweed fertilizers is widely favored by farmers and manufacturers. The mannitol content in the kelp can reach 3.2-17.8%, but most of mannitol is lost in the processing process of fresh kelp because the mannitol has good water solubility and belongs to monosaccharide and is easy to be degraded by bacteria. At present, some enterprises in China also chelate metal ions again by utilizing oligosaccharide, polysaccharide, sugar alcohol and the like in the seaweed extract to form a more stable complex, the method is generally divided into two steps and consumes a long time, and in the production process of the seaweed extract, due to the low extraction rate of mannitol, other sugar alcohol is generally required to be additionally added, so that certain economic pressure is caused.
Disclosure of Invention
Aiming at the defects in the prior art, the invention mainly aims to provide the seaweed liquid chelated fertilizer.
The second purpose of the invention is to provide a preparation method of the seaweed liquid chelate fertilizer.
In order to achieve the above primary object, the solution of the present invention is:
the seaweed liquid chelated fertilizer comprises the following components:
wherein, the algin lyase and the pectinase are purchased from Novoxil (China) biotechnology limited, and the cellulase is purchased from Nookfield technology development of Tianjin.
In one embodiment, the surfactant is selected from one or more of alkyl glycosides or dodecyl betaines.
In order to achieve the second objective, the solution of the invention is:
the preparation method of the seaweed liquid chelated fertilizer comprises the following steps:
(1) pulping 100 parts of fresh kelp, adding 3-4 parts of alginate lyase enzyme solution, 0.2-0.5 part of cellulase and 1-2 parts of pectinase, heating, and stirring to obtain a first mixed solution;
(2) adding 3-4 parts of boric acid, 12-25 parts of calcium nitrate tetrahydrate, 6-12 parts of magnesium nitrate hexahydrate and 3-4 parts of dipotassium phosphate into the first mixed solution, stirring at constant temperature, performing enzymolysis and chelation to obtain a second mixed solution;
(3) and adding 0.01-0.02 part of surfactant into the second mixed solution, heating to 60-65 ℃, preserving heat for 3-5 hours, and naturally cooling to obtain the seaweed liquid chelate fertilizer.
In one embodiment, in the step (1), the temperature is increased to 42 +/-2 ℃, and the rotation speed of stirring is 200 +/-10 r/min.
In the step (1), the enzyme preparations (including alginate lyase, cellulase and pectinase) added in the invention all have the function of enzymolyzing the fresh kelp. The macromolecular substances in the fresh kelp are enzymolyzed into water-soluble micromolecule saccharides, such as monosaccharide, alginate oligosaccharide and the like. And the organic matter is chelated with calcium, magnesium, boron and other elements through chelation to form a stable compound which can be absorbed by plants.
In one embodiment, in the step (2), the rotation speed of constant temperature stirring is 180-.
In one embodiment, in the step (2), the chelating temperature is 40-45 ℃, and the chelating time is 24-36 h.
In the step (2), the effects of various components in the seaweed liquid chelating fertilizer are independent, the added substances are all elements necessary for plant growth, and organic reagents suitable for chelation (such as boric acid, calcium nitrate tetrahydrate and magnesium nitrate hexahydrate are all common chelating reagents).
The dipotassium phosphate added in the present invention can serve not only to add phosphorus and potassium elements to the fertilizer but also to stabilize the chelate solution system (dipotassium phosphate is a commonly used solution buffer agent and maintains the stability of the chelate system by maintaining the ionization degree of the original chelate solution as much as possible by inhibiting the pH change).
The reaction equation of chelating mannitol and boric acid to generate complexing acid with stronger acidity and stronger stability is as follows:
in one embodiment, in step (3), the surfactant is selected from one or more of alkyl glycoside or dodecyl betaine.
In the step (3), the heat preservation time is 3-5h, so that the biological enzyme in the fertilizer is inactivated, and meanwhile, a chelating system is stabilized, and the stability is improved.
Due to the adoption of the scheme, the invention has the beneficial effects that:
firstly, because the seaweed fertilizer is difficult to be sterilized in the production process, the loss of mannitol is extremely large, and the invention utilizes the mannitol to chelate boric acid to produce a complex with higher stability, thereby effectively reducing the problem of unnecessary loss of mannitol in the enzymolysis and bacterial degradation processes in the production process of the seaweed fertilizer. Meanwhile, more fertilizer metal ions are chelated by using the reserved mannitol (the mannitol can chelate three metal ions of calcium, magnesium and boron), the production time is shortened, and the production efficiency is improved.
Secondly, the invention combines the production of the seaweed liquid and the chelating of metal ions, and the monosaccharide and the polysaccharide in the enzymolysis liquid are utilized to the maximum extent to chelate the metal ions through long-time chelating, thereby improving the chelating rate and further increasing the fertility.
Thirdly, the preparation technology of the invention is environment-friendly, the large-scale production process is simple, the cost is lower than that of the common process, and no waste is caused.
Detailed Description
The invention provides a seaweed liquid chelated fertilizer and a preparation method thereof.
The present invention will be further described with reference to the following examples.
Example (b):
the preparation method of the seaweed liquid chelated fertilizer comprises the following steps:
(1) crushing 100 parts of fresh kelp, adding 3.5 parts of alginate lyase liquid, 0.3 part of cellulase and 1.5 parts of pectinase, heating to 42 ℃, and stirring to 200 r/min.
(2) Adding 4 parts of boric acid, 13.5 parts of calcium nitrate tetrahydrate, 10 parts of magnesium nitrate hexahydrate and 3.5 parts of dipotassium hydrogen phosphate, and carrying out enzymolysis and chelation at constant temperature for 36 hours.
(3) After chelation is finished, 0.01 part of alkyl glycoside is added, the temperature of the chelated fertilizer is raised to 65 ℃, and the temperature is kept for 5 hours; and then naturally cooling to obtain the seaweed liquid chelated fertilizer.
Comparative example:
the preparation method of the seaweed liquid chelated fertilizer comprises the following steps:
(1) crushing 100 parts of fresh kelp, adding 3.5 parts of alginate lyase liquid, 0.4 part of cellulase and 1.2 parts of pectinase, heating to 40 ℃, and stirring to 180 r/min.
(2) And after 24h of enzymolysis, heating the enzymolysis liquid to 65 ℃, and preserving the temperature for 2h to inactivate the enzyme. And then naturally cooling.
(3) And adding 3.5 parts of boric acid, 13 parts of calcium nitrate tetrahydrate and 11 parts of magnesium nitrate hexahydrate, stirring until the mixture is completely dissolved, and centrifuging to obtain the compound seaweed fertilizer.
TABLE 1 comparison of the indices of the examples and comparative examples
| Mannitol content (%) | Low temperature stability at 4 DEG C | Clarity and color | |
| Examples | 3.11 | No precipitation in 60 days, good stability | Orange yellow clear liquid |
| Comparative example | 0.02 | After 30 days, a small amount of crystals precipitated | Brown clear liquid |
Table 1 shows that the content of mannitol in the example is not significantly reduced compared with fresh kelp, and the combination of the mannitol-boric acid chemical reaction equation shows that monosaccharide and metal ions are tightly combined together through chelation, the acidity constant of the solution is enhanced, and a better inhibition effect on microbial propagation is achieved, so that the bacterial degradation and loss of mannitol are reduced.
In the examples, surfactants and dipotassium hydrogen phosphate were added more than in the comparative examples, since dipotassium hydrogen phosphate mainly acts as a buffer in the chelating system.
In the embodiment, the chelating solution is rich in mannitol chelating metal ions, and can enter the interior of the leaf surface through leaf tissue to carry nutrient-carrying ingredients to be transported at the phloem, so that a surfactant needs to be added to enable the diluted and sprayed liquid fertilizer to be spread on the leaf surface of a plant, the fertilizer effect action time is prolonged, and the like. The seaweed fertilizer produced by the common process is mainly absorbed by the roots of plants, so that a surfactant is not required to be additionally added.
< experiment >
The seaweed liquid chelate fertilizer obtained in the example is subjected to the following fertilizer efficiency comparison experiment:
the experiment was set up in the laboratory farm of Kaepu Bio Inc., Rong Cheng City. The experimental field area is 25m2(5 m in length and 5m in width) and a total area of 75m2The shallot stock plant is purchased in the farm trade market of honor city and is cultivated by the stock plant in a separated plant mode. The three groups of experimental fields are applied with the same amount of seaweed liquid chelated fertilizer, watered regularly, and are not applied with other fertilizers.
The main difference of the seaweed fertilizer in the embodiment and the comparative example is the content of mannitol and the stability of metal ions, and the mannitol mainly acts on plant leaves and can be used for quickly transmitting and driving nutrients at plant phloem to be efficiently utilized and shortening the nutrient absorption time, so the fertilizer efficiency is considered in two aspects of mainly selecting stem thickness and yield.
Respectively randomly sampling 50 plants after culturing for 70d, measuring the stem thickness of the plants, and recording the fresh weight.
TABLE 2 Effect of different fertilisations on the growth of the stem thickness and yield of the shallots
| Treatment of | Chip yield (kg/25 m)2) | Maximum stem thickness (mm) |
| Example (dilution 600 times) | 116.3 | 9.03±0.32 |
| Comparative example (dilution 600 times) | 99.7 | 8.35±0.62 |
As can be seen from the experimental results in Table 2, the seaweed liquid chelated fertilizer in the embodiment has more obvious promotion effect on plant growth, faster plant growth and higher yield. The stem of the chive is stronger and plump, and the integral difference is smaller, which shows that the metal ions have stable effect on the plant and have greater advantages compared with the traditional process of the comparative example.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. It will be readily apparent to those skilled in the art that various modifications to these embodiments and the generic principles defined herein may be applied to other embodiments without the use of the inventive faculty. Therefore, the present invention is not limited to the above-described embodiments. Those skilled in the art should appreciate that many modifications and variations are possible in light of the above teaching without departing from the scope of the invention.
Claims (7)
1. The seaweed liquid chelated fertilizer is characterized in that: the paint comprises the following components:
2. the seaweed liquid chelated fertilizer according to claim 1, characterized in that: the surfactant is selected from more than one of alkyl glycoside or dodecyl betaine.
3. The method for preparing the seaweed liquid chelated fertilizer according to claim 1, characterized by comprising the following steps: which comprises the following steps:
(1) pulping 100 parts of fresh kelp, adding 3-4 parts of alginate lyase enzyme solution, 0.2-0.5 part of cellulase and 1-2 parts of pectinase, heating, and stirring to obtain a first mixed solution;
(2) adding 3-4 parts of boric acid, 12-25 parts of calcium nitrate tetrahydrate, 6-12 parts of magnesium nitrate hexahydrate and 3-4 parts of dipotassium phosphate into the first mixed solution, stirring at constant temperature, performing enzymolysis and chelation to obtain a second mixed solution;
(3) and adding 0.01-0.02 part of surfactant into the second mixed solution, heating to 60-65 ℃, preserving heat for 3-5 hours, and naturally cooling to obtain the seaweed liquid chelate fertilizer.
4. The production method according to claim 3, characterized in that: in the step (1), the temperature rise is 42 +/-2 ℃, and the stirring speed is 200 +/-10 r/min.
5. The production method according to claim 3, characterized in that: in the step (2), the rotation speed of the constant-temperature stirring is 180-250r/min, and the constant temperature is 42 +/-2 ℃.
6. The production method according to claim 3, characterized in that: in the step (2), the chelation temperature is 40-45 ℃, and the chelation time is 24-36 h.
7. The production method according to claim 3, characterized in that: in the step (3), the surfactant is selected from more than one of alkyl glycoside or dodecyl betaine.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114195582A (en) * | 2021-12-27 | 2022-03-18 | 威海长青海洋科技股份有限公司 | Amino acid chelated fertilizer for marine shellfish and preparation method thereof |
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2020
- 2020-12-28 CN CN202011580824.2A patent/CN112679277A/en active Pending
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| CN103242082A (en) * | 2013-05-23 | 2013-08-14 | 中国海洋大学生物工程开发有限公司 | Seaweed chelate tree nutrient solution and preparation method thereof |
| KR20150099689A (en) * | 2014-02-21 | 2015-09-01 | 시원해양 주식회사 | Extract of seaweed, feedstuff and fertilizer using the same, and preparing thereof |
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| CN107628888A (en) * | 2017-11-13 | 2018-01-26 | 华南农业大学 | A kind of seaweed liquid fertilizer with drought resisting function and preparation method and application |
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Application publication date: 20210420 |