CN113912444A - Biological humic acid compound fertilizer and preparation method thereof - Google Patents
Biological humic acid compound fertilizer and preparation method thereof Download PDFInfo
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- CN113912444A CN113912444A CN202111205163.XA CN202111205163A CN113912444A CN 113912444 A CN113912444 A CN 113912444A CN 202111205163 A CN202111205163 A CN 202111205163A CN 113912444 A CN113912444 A CN 113912444A
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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
- C05G3/00—Mixtures of one or more fertilisers with additives not having a specially fertilising activity
-
- C—CHEMISTRY; METALLURGY
- C05—FERTILISERS; MANUFACTURE THEREOF
- C05B—PHOSPHATIC FERTILISERS
- C05B13/00—Fertilisers produced by pyrogenic processes from phosphatic materials
- C05B13/02—Fertilisers produced by pyrogenic processes from phosphatic materials from rock phosphates
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- C—CHEMISTRY; METALLURGY
- C05—FERTILISERS; MANUFACTURE THEREOF
- C05F—ORGANIC FERTILISERS NOT COVERED BY SUBCLASSES C05B, C05C, e.g. FERTILISERS FROM WASTE OR REFUSE
- C05F17/00—Preparation of fertilisers characterised by biological or biochemical treatment steps, e.g. composting or fermentation
- C05F17/50—Treatments combining two or more different biological or biochemical treatments, e.g. anaerobic and aerobic treatment or vermicomposting and aerobic treatment
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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
- C05G3/00—Mixtures of one or more fertilisers with additives not having a specially fertilising activity
- C05G3/40—Mixtures of one or more fertilisers with additives not having a specially fertilising activity for affecting fertiliser dosage or release rate; for affecting solubility
-
- 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
- C05G3/00—Mixtures of one or more fertilisers with additives not having a specially fertilising activity
- C05G3/80—Soil conditioners
-
- 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
- C05G5/10—Solid or semi-solid fertilisers, e.g. powders
- C05G5/12—Granules or flakes
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W30/00—Technologies for solid waste management
- Y02W30/40—Bio-organic fraction processing; Production of fertilisers from the organic fraction of waste or refuse
Abstract
The invention relates to a biological humic acid compound fertilizer and a preparation method thereof, belonging to the technical field of compound fertilizers, and the compound fertilizer is prepared by the following steps: fully mixing the livestock and poultry manure, urea, plant ash and attapulgite; adding humic acid and nano calcium carbonate powder, uniformly mixing, adjusting the water content, and adjusting the pH value by using a pH regulator to obtain a mixture; secondly, performing primary fermentation on the mixture; and then carrying out secondary fermentation, after the fermentation is finished, adding a water retention additive and quaternary ammonium salt chitosan, stirring and mixing, and finally granulating to obtain the biological humic acid compound fertilizer. In the preparation process of the compound fertilizer, the water-retaining additive is added, the salt tolerance of the compound fertilizer can be improved by introducing the nonionic long-chain hydrophobic monomer into the molecules of the water-retaining additive, and the compound fertilizer has a certain slow release function by matching with humic acid, can chelate trace elements in soil and effectively improves the utilization rate of the fertilizer.
Description
Technical Field
The invention belongs to the technical field of compound fertilizers, and particularly relates to a biological humic acid compound fertilizer and a preparation method thereof.
Background
The fertilizer as an important agricultural product plays a remarkable role in improving the crop yield and is an indispensable production element in modern agriculture. The inorganic fertilizer is used in a large amount for a long time by people, and due to the fact that the using mode is improper, the utilization rate of the fertilizer is low, the fertilizer is lost in a large amount, soil and water are polluted, the stress resistance of crops is reduced, the sustainable development of agriculture is affected, the soil fertility is reduced easily due to the large application of the inorganic fertilizer, the acid-base balance of soil is damaged, and the problems of reduction of the organic matter content of the soil, soil hardening and the like are caused.
Disclosure of Invention
In order to solve the technical problems mentioned in the background technology, the invention provides a biological humic acid compound fertilizer and a preparation method thereof.
The purpose of the invention can be realized by the following technical scheme:
a biological humic acid compound fertilizer comprises the following raw materials in parts by weight:
60-80 parts of livestock and poultry manure, 20-30 parts of urea, 20-35 parts of humic acid, 15-25 parts of plant ash, 8-12 parts of attapulgite, 3-5 parts of nano calcium carbonate powder, 15-25 parts of a water retention additive and 10-12 parts of quaternary ammonium salt chitosan;
a preparation method of a biological humic acid compound fertilizer comprises the following steps:
firstly, fully mixing livestock and poultry manure, urea, plant ash and attapulgite; adding humic acid and nano calcium carbonate powder, mixing uniformly, adjusting the water content to 50-55%, and adjusting the pH value to 5.0-6.5 by using a pH regulator to obtain a mixture;
secondly, performing primary fermentation on the mixture for 5 days, wherein the fermentation temperature is controlled to be 50-55 ℃; and then heating to 55-65 ℃, carrying out secondary fermentation for 10 days, adding a water retention additive and quaternary ammonium salt chitosan after the fermentation is finished, stirring and mixing, and finally granulating to obtain the biological humic acid compound fertilizer. The water-fast-dissolving cationic chitosan quaternary ammonium salt has good antibacterial property, film forming property, cation adsorption property, moisture absorption and retention property, flocculation property, antistatic property and other properties, and the antibacterial effect of the compound fertilizer is improved by adding the water-fast-dissolving cationic chitosan quaternary ammonium salt into the biological humic acid compound fertilizer, thereby being beneficial to storage.
Further, the pH regulator is prepared from a calcium magnesium phosphate fertilizer, plant ash and diatomite according to a mass ratio of 1: 1: 1, and preparing the composition.
Further, the water retention additive is prepared by the following steps:
mixing carboxymethyl cellulose and deionized water, stirring for 40min at 75 ℃, cooling to 25 ℃ after stirring is finished, adding modified hydroxyapatite, polymerizable monomer, ammonium persulfate and N, N-methylene bisacrylamide under the protection of nitrogen, adding sodium hydroxide to adjust the pH value to 7, heating to 22 ℃, stirring for reacting for 2h, filtering, washing with ethanol with the volume fraction of 75%, and then shearing and drying to obtain the water-retaining additive.
Further, the dosage ratio of the carboxymethyl cellulose, the modified hydroxyapatite, the polymerizable monomer, the ammonium persulfate, the N, N-methylene-bisacrylamide and the deionized water is 0.6 g: 1-2 g: 8 g: 0.15 g: 0.05 g: 50 mL; the polymerizable monomer is acrylic acid and acrylamide according to the mass ratio of 1.5-2.5: 1 are mixed.
Further, the modified hydroxyapatite is prepared by the following steps:
step S11, mixing absolute ethyl alcohol and deionized water, adding gamma-aminopropyltriethoxysilane, stirring for 30min at the temperature of 25 ℃, adding hydroxyapatite, continuously stirring for 3h, adjusting the pH value to 10 with ammonia water, keeping the temperature constant, continuously stirring for reaction for 3h, filtering after the reaction is finished, washing with absolute ethyl alcohol, drying at 40 ℃ to constant weight after the washing is finished, and obtaining a solid a which is amino-containing hydroxyapatite; the hydroxyapatite containing the amino is prepared by the reaction of the silane coupling agent gamma-aminopropyl triethoxysilane and the hydroxyapatite, and the subsequent participation in the reaction is facilitated after the amino is introduced;
and step S12, mixing the solid a and tetrahydrofuran, ultrasonically dispersing for 20min, adding an octenyl succinic anhydride solution under the protection of nitrogen, stirring and reacting for 24h at the temperature of 30 ℃, filtering after the reaction is finished, washing with trichloromethane, and drying in vacuum to constant weight at the temperature of 40 ℃ after the washing is finished to obtain the modified hydroxyapatite. The hydroxyl apatite containing amino group and octenyl succinic anhydride react to introduce alkyl long chain and unsaturated double bond to prepare the modified hydroxyl apatite.
Further, the volume ratio of the absolute ethyl alcohol to the deionized water in the step S11 is 9: 1; the dosage ratio of the gamma-aminopropyltriethoxysilane, the hydroxyapatite and the absolute ethyl alcohol is 0.5 g: 2 g: 180 mL; the octenyl succinic anhydride solution in step S12 was octenyl succinic anhydride and tetrahydrofuran in an amount of 0.1 g: 5mL of the mixture, wherein the dosage ratio of the solid a, the octenyl succinic anhydride solution and the tetrahydrofuran is 0.1 g: 5mL of: 10 mL.
The invention has the beneficial effects that:
in the preparation process of the biological humic acid compound fertilizer, the water-retaining additive is added, the salt tolerance of the biological humic acid compound fertilizer can be improved by introducing the nonionic long-chain hydrophobic monomer into the molecules of the water-retaining additive, and the biological humic acid compound fertilizer has a certain slow release function by matching with humic acid, can chelate trace elements in soil and effectively improves the utilization rate of the fertilizer.
The hydroxyapatite in the raw materials for preparing the water retention additive contains rich nutrient elements such as N, P, is a high-quality biological phosphorus-calcium material, has good biocompatibility and can be naturally degraded, and the modified hydroxyapatite has a promoting effect on the water retention effect; the carboxymethyl cellulose is a natural renewable raw material which is artificially modified, and has the characteristics of good solubility, environmental friendliness, biodegradability, strong salt resistance, low price and the like; the two raw materials are used as matrixes, so that the influence on the environment is small, the water retention effect of the soil is improved, and the utilization rate of the fertilizer is also improved.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, 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 invention.
Example 1
Preparing modified hydroxyapatite:
step S11, mixing absolute ethyl alcohol and deionized water, adding gamma-aminopropyltriethoxysilane, stirring for 30min at the temperature of 25 ℃, adding hydroxyapatite, continuously stirring for 3h, adjusting the pH value to 10 with ammonia water, keeping the temperature constant, continuously stirring for reaction for 3h, filtering after the reaction is finished, washing with absolute ethyl alcohol, drying at 40 ℃ to constant weight after the washing is finished, and obtaining a solid a which is amino-containing hydroxyapatite; wherein the volume ratio of the absolute ethyl alcohol to the deionized water is 9: 1; the dosage ratio of the gamma-aminopropyltriethoxysilane, the hydroxyapatite and the absolute ethyl alcohol is 0.5 g: 2 g: 180 mL;
step S12, mixing the solid a and tetrahydrofuran, ultrasonically dispersing for 20min, adding an octenyl succinic anhydride solution under the protection of nitrogen, stirring and reacting for 24h at the temperature of 30 ℃, filtering after the reaction is finished, washing with trichloromethane, and drying in vacuum at the temperature of 40 ℃ to constant weight after the washing is finished to obtain modified hydroxyapatite; wherein the octenyl succinic anhydride solution is composed of octenyl succinic anhydride and tetrahydrofuran according to a ratio of 0.1 g: 5mL of the mixture, wherein the dosage ratio of the solid a, the octenyl succinic anhydride solution and the tetrahydrofuran is 0.1 g: 5mL of: 10 mL.
Example 2
Preparing a water retention additive:
mixing carboxymethyl cellulose and deionized water, stirring for 40min at 75 ℃, cooling to 25 ℃ after stirring is finished, adding modified hydroxyapatite, polymerizable monomer, ammonium persulfate and N, N-methylene bisacrylamide under the protection of nitrogen, adding sodium hydroxide to adjust the pH value to 7, heating to 22 ℃, stirring for reacting for 2h, filtering, washing with ethanol with the volume fraction of 75%, and then shearing and drying to obtain the water-retaining additive.
Wherein the dosage ratio of the carboxymethyl cellulose, the modified hydroxyapatite, the polymerizable monomer, the ammonium persulfate, the N, N-methylene-bisacrylamide and the deionized water is 0.6 g: 1 g: 8 g: 0.15 g: 0.05 g: 50 mL; the polymerizable monomer is acrylic acid and acrylamide according to a mass ratio of 1.5: 1, mixing; modified hydroxyapatite was prepared as in example 1.
Example 3
Preparing a water retention additive:
mixing carboxymethyl cellulose and deionized water, stirring for 40min at 75 ℃, cooling to 25 ℃ after stirring is finished, adding modified hydroxyapatite, polymerizable monomer, ammonium persulfate and N, N-methylene bisacrylamide under the protection of nitrogen, adding sodium hydroxide to adjust the pH value to 7, heating to 22 ℃, stirring for reacting for 2h, filtering, washing with ethanol with the volume fraction of 75%, and then shearing and drying to obtain the water-retaining additive.
Wherein the dosage ratio of the carboxymethyl cellulose, the modified hydroxyapatite, the polymerizable monomer, the ammonium persulfate, the N, N-methylene-bisacrylamide and the deionized water is 0.6 g: 2 g: 8 g: 0.15 g: 0.05 g: 50 mL; the polymerizable monomer is acrylic acid and acrylamide according to a mass ratio of 2.5: 1, mixing; modified hydroxyapatite was prepared as in example 1.
Example 4
A preparation method of a biological humic acid compound fertilizer comprises the following steps:
firstly, fully mixing livestock and poultry manure, urea, plant ash and attapulgite; adding humic acid and nano calcium carbonate powder, uniformly mixing, adjusting the water content to 50%, and adjusting the pH value to 5.0 by using a pH regulator to obtain a mixture;
secondly, performing primary fermentation on the mixture for 5 days, wherein the fermentation temperature is controlled at 50 ℃; and then heating to 55 ℃, carrying out secondary fermentation for 10 days, adding a water retention additive and quaternary ammonium salt chitosan after the fermentation is finished, stirring and mixing, and finally granulating to obtain the biological humic acid compound fertilizer.
Wherein the raw materials comprise the following components in parts by weight: 60 parts of livestock and poultry manure, 20 parts of urea, 20 parts of humic acid, 15 parts of plant ash, 8 parts of attapulgite, 3 parts of nano calcium carbonate powder, 15 parts of water retention additive and 10 parts of quaternary ammonium salt chitosan; the pH regulator is prepared from calcium magnesium phosphate fertilizer, plant ash and diatomite according to a mass ratio of 1: 1: 1, preparing; the water retention additive was prepared as in example 3.
Example 5
A preparation method of a biological humic acid compound fertilizer comprises the following steps:
firstly, fully mixing livestock and poultry manure, urea, plant ash and attapulgite; adding humic acid and nano calcium carbonate powder, uniformly mixing, adjusting the water content to 50%, and adjusting the pH value to 5.0 by using a pH regulator to obtain a mixture;
secondly, performing primary fermentation on the mixture for 5 days, wherein the fermentation temperature is controlled at 55 ℃; and then heating to 60 ℃, carrying out secondary fermentation for 10 days, adding a water retention additive and quaternary ammonium salt chitosan after the fermentation is finished, stirring and mixing, and finally granulating to obtain the biological humic acid compound fertilizer.
Wherein the raw materials comprise the following components in parts by weight: 70 parts of livestock and poultry manure, 25 parts of urea, 30 parts of humic acid, 20 parts of plant ash, 10 parts of attapulgite, 4 parts of nano calcium carbonate powder, 20 parts of water retention additive and 11 parts of quaternary ammonium salt chitosan; the pH regulator is prepared from calcium magnesium phosphate fertilizer, plant ash and diatomite according to a mass ratio of 1: 1: 1, preparing; the water retention additive was prepared as in example 3.
Example 6
A preparation method of a biological humic acid compound fertilizer comprises the following steps:
firstly, fully mixing livestock and poultry manure, urea, plant ash and attapulgite; adding humic acid and nano calcium carbonate powder, uniformly mixing, adjusting the water content to 55%, and adjusting the pH value to 6.5 by using a pH regulator to obtain a mixture;
secondly, performing primary fermentation on the mixture for 5 days, wherein the fermentation temperature is controlled at 55 ℃; and then heating to 65 ℃, carrying out secondary fermentation for 10 days, adding a water retention additive and quaternary ammonium salt chitosan after the fermentation is finished, stirring and mixing, and finally granulating to obtain the biological humic acid compound fertilizer.
Wherein the raw materials comprise the following components in parts by weight: 80 parts of livestock and poultry manure, 30 parts of urea, 35 parts of humic acid, 25 parts of plant ash, 12 parts of attapulgite, 5 parts of nano calcium carbonate powder, 25 parts of water retention additive and 12 parts of quaternary ammonium salt chitosan; the pH regulator is prepared from calcium magnesium phosphate fertilizer, plant ash and diatomite according to a mass ratio of 1: 1: 1, preparing; the water retention additive was prepared as in example 3.
Comparative example 1
The modified hydroxyapatite in example 3 was changed to an unmodified hydroxyapatite, and the remaining raw materials and preparation process were kept unchanged.
Comparative example 2
The water retention additive of example 5 was replaced with the sample prepared in comparative example 1, and the remaining raw materials and preparation process were kept unchanged.
Comparative example 3
The water retention additive of example 5 was not added and the remaining raw materials and preparation process remained the same.
The compound fertilizers prepared in the examples 4-6 and the comparative examples 2-3 are tested, the fertilizing amount is 30 kg/mu, and the crops are corns; the test results are shown in table 1 below:
TABLE 1
| Plant height (cm) | Average yield per mu (kg) | Yield increase (%) | |
| Example 4 | 180 | 703 | 11.7 |
| Example 5 | 182 | 705 | 12.1 |
| Example 6 | 181 | 705 | 11.9 |
| Comparative example 2 | 162 | 632 | 6.2 |
| Comparative example 3 | 150 | 610 | - |
From the above table 1, it can be seen that the compound fertilizer prepared by the present invention has an effect of promoting the yield increase of corn, i.e., the addition of the water retention additive has an effect of promoting the yield increase.
In the description herein, references to the description of "one embodiment," "an example," "a specific example" or the like are intended to mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
The foregoing is illustrative and explanatory only and is not intended to be exhaustive or to limit the invention to the precise embodiments described, and various modifications, additions, and substitutions may be made by those skilled in the art without departing from the scope of the invention or exceeding the scope of the claims.
Claims (7)
1. A biological humic acid compound fertilizer comprises the following raw materials in parts by weight: 60-80 parts of livestock and poultry manure, 20-30 parts of urea, 20-35 parts of humic acid, 15-25 parts of plant ash, 8-12 parts of attapulgite, 3-5 parts of nano calcium carbonate powder, 15-25 parts of a water retention additive and 10-12 parts of quaternary ammonium salt chitosan; the water-retaining additive is characterized by being prepared by the following steps:
mixing carboxymethyl cellulose and deionized water, stirring for 40min at 75 ℃, cooling to 25 ℃ after stirring is finished, adding modified hydroxyapatite, polymerizable monomer, ammonium persulfate and N, N-methylene bisacrylamide under the condition of nitrogen protection, adding sodium hydroxide to adjust the pH value to 7, heating to 22 ℃, and stirring for reacting for 2h to obtain the water-retaining additive.
2. The biological humic acid compound fertilizer as claimed in claim 1, wherein the dosage ratio of the carboxymethyl cellulose, the modified hydroxyapatite, the polymerizable monomer, the ammonium persulfate, the N, N-methylene bisacrylamide and the deionized water is 0.6 g: 1-2 g: 8 g: 0.15 g: 0.05 g: 50 mL; the polymerizable monomer is acrylic acid and acrylamide according to the mass ratio of 1.5-2.5: 1 are mixed.
3. The biological humic acid compound fertilizer as claimed in claim 1, wherein the modified hydroxyapatite is prepared by the following steps:
step S11, mixing absolute ethyl alcohol and deionized water, adding gamma-aminopropyltriethoxysilane, stirring for 30min at the temperature of 25 ℃, adding hydroxyapatite, continuously stirring for 3h, adjusting the pH value to 10 with ammonia water, keeping the temperature unchanged, and continuously stirring for reaction for 3h to obtain a solid a;
and step S12, mixing the solid a and tetrahydrofuran, ultrasonically dispersing for 20min, adding an octenyl succinic anhydride solution under the protection of nitrogen, and stirring and reacting for 24h at the temperature of 30 ℃ to obtain the modified hydroxyapatite.
4. The biological humic acid compound fertilizer as claimed in claim 3, wherein the volume ratio of the absolute ethyl alcohol to the deionized water in the step S11 is 9: 1; the dosage ratio of the gamma-aminopropyltriethoxysilane, the hydroxyapatite and the absolute ethyl alcohol is 0.5 g: 2 g: 180 mL; the octenyl succinic anhydride solution in step S12 was octenyl succinic anhydride and tetrahydrofuran in an amount of 0.1 g: 5mL of the mixture, wherein the dosage ratio of the solid a, the octenyl succinic anhydride solution and the tetrahydrofuran is 0.1 g: 5mL of: 10 mL.
5. The preparation method of the biological humic acid compound fertilizer as claimed in claim 1, which is characterized by comprising the following steps:
firstly, fully mixing livestock and poultry manure, urea, plant ash and attapulgite; adding humic acid and nano calcium carbonate powder, mixing uniformly, adjusting the water content to 50-55%, and adjusting the pH value to 5.0-6.5 by using a pH regulator to obtain a mixture;
secondly, performing primary fermentation on the mixture; and then carrying out secondary fermentation, after the fermentation is finished, adding a water retention additive and quaternary ammonium salt chitosan, stirring and mixing, and finally granulating to obtain the biological humic acid compound fertilizer.
6. The preparation method of the biological humic acid compound fertilizer as claimed in claim 5, wherein the pH regulator is prepared from a calcium magnesium phosphate fertilizer, plant ash and diatomite in a mass ratio of 1: 1: 1, and preparing the composition.
7. The method for preparing the biological humic acid compound fertilizer as claimed in claim 5, wherein the fermentation time of the primary fermentation is 5 days, and the fermentation temperature is controlled at 50-55 ℃; the fermentation time of the secondary fermentation is 10 days, and the fermentation temperature is controlled to be 55-65 ℃.
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Application publication date: 20220111 |