Soil conditioner suitable for alkaline soil and preparation method thereof
By combining composite nanomaterials with other soil conditioners, the problems of high pH and high salinity in alkaline soils are solved, soil structure and nutrient supply are improved, plant growth is promoted, and agricultural yield and quality are increased.
Patent Information
- Application Number
- CN202511060912.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-07-30
- Publication Date
- 2025-11-21
AI Technical Summary
The high pH and salinity caused by alkaline soils result in compact soil structure and nutrient deficiency, which limits plant growth and agricultural yield. Existing soil conditioners are insufficient to comprehensively improve soil properties.
A soil conditioner composed of composite nanomaterials, citric acid gypsum, modified polyaspartic acid calcium salt, astaxanthin, etc., adjusts pH value, improves soil structure and provides nutrients. The preparation method includes processes such as pulping, mixing, crushing and granulation.
It effectively neutralizes alkaline soil, increases soil permeability and water retention capacity, provides plants with the nutrients they need, promotes plant growth, improves crop yield and quality, and prevents infection by Trichoderma tumefaciens.
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Abstract
Description
Technical Field
[0001] This invention belongs to the field of soil treatment technology, specifically, it relates to a soil conditioner suitable for alkaline soils and its preparation method. Background Technology
[0002] Alkaline soils are soil types with a high pH value (greater than 7), found in farmland and horticultural sites around the world. This type of soil negatively impacts plant growth and crop yields because the high pH makes it difficult for many nutrients to be effectively absorbed, and it also increases the content of salts and alkalis in the soil, thus limiting the development of plant roots.
[0003] To improve the texture and properties of alkaline soils, researchers have been searching for effective soil conditioners and improvement methods. Soil conditioners are substances added to alter the chemical, physical, and biological properties of soil, thereby enhancing its fertility, water retention capacity, and permeability, and creating a more favorable soil environment for plant growth.
[0004] In past studies, many soil conditioners have been tried and applied to improve alkaline soils. These conditioners typically include organic matter, soil amendments, minerals, and microbial preparations. However, a single conditioner often fails to meet the comprehensive needs of alkaline soil improvement, thus requiring a comprehensive soil conditioner to address the problem of alkaline soils.
[0005] In recent years, composite nanomaterials have gradually attracted the attention of researchers as a novel soil conditioner. Composite nanomaterials possess a large specific surface area and abundant active functional groups, enabling them to perform multiple functions in soil. For example, nanomaterials can neutralize alkaline substances in the soil and regulate soil pH; they can also improve soil structure, increase soil permeability and water retention capacity; furthermore, nanomaterials can act as carriers to provide plants with the nutrients they need and promote their absorption and utilization.
[0006] Against this background, this invention introduces a soil conditioner suitable for alkaline soils and its preparation method. This conditioner uses composite nanomaterials as key components, combined with citric acid gypsum, modified polyaspartic acid calcium salt, astaxanthin, and other additives. By adjusting soil pH, improving soil structure, and providing essential nutrients for plants, it aims to effectively improve the characteristics of alkaline soils, thereby enhancing soil fertility and crop yield. The preparation method, through a series of process steps from raw material selection to mixing, crushing, and granulation, realizes the preparation and production of the soil conditioner. This soil conditioner suitable for alkaline soils has potential application prospects and provides a new solution to the problem of alkaline soils. Summary of the Invention
[0007] 1. The problem to be solved
[0008] To address the problems existing in the prior art, this invention provides a soil conditioner suitable for alkaline soils and its preparation method. This invention introduces composite nanomaterials and composite microbial agents into traditional basic fertilizers, effectively improving alkaline soil conditions. This fertilizer not only effectively enhances the quality of cucumbers but also prevents infection by *Cyclocarya paliurus*. Alkaline soils typically have high pH and high salinity, leading to problems such as compact soil structure, nutrient deficiency, and restricted plant root systems. These factors limit normal plant growth and development, posing challenges to agricultural yields and sustainable land use. Soil conditioners are one of the key means to improve soil properties and texture. By adding appropriate conditioners, the chemical, physical, and biological properties of the soil can be altered, improving soil fertility, water retention capacity, and permeability, thus providing a better growing environment for plants. By using this soil conditioner, the following improvements are expected to be achieved: adjusting soil pH and neutralizing alkaline soil; improving soil structure, increasing soil permeability and water retention capacity; providing plants with the necessary nutrients and increasing soil fertility; reducing soil salinity and improving soil texture; promoting plant growth and development; and increasing crop yield and quality.
[0009] 2. Technical Solution
[0010] To solve the above problems, the present invention adopts the following technical solution.
[0011] A soil conditioner suitable for alkaline soils, comprising the following raw materials in parts by weight: 100-200 parts citric acid gypsum 40-80 parts zinc humic acid 30-60 parts boric acid 15-35 parts of modified polyaspartic calcium salt, 10-20 parts astaxanthin 10-16 parts of composite nanomaterials 5-10 parts straw biochar 1-4 parts biological sulfur EM bacterial agent 0.2-0.8 parts, EDTA chelated iron 0.1-0.6 parts.
[0012] The soil conditioner suitable for alkaline soils, by weight, comprises the following raw materials: 120-160 parts citric acid gypsum 50-70 parts zinc humic acid 40-50 parts boric acid 20-30 parts of modified polyaspartic calcium salt, Astaxanthin 12-18 parts 13-16 parts of composite nanomaterials 5-10 parts straw biochar 1-4 parts biological sulfur EM bacterial agent 0.2-0.8 parts, EDTA chelated iron 0.1-0.6 parts.
[0013] The soil conditioner suitable for alkaline soils, by weight, comprises the following raw materials: 140 parts of citric acid gypsum 60 parts zinc humic acid 20 parts of modified polyaspartic calcium salt, 13 servings of astaxanthin 45 parts boric acid 15 parts of composite nanomaterials, 8 portions of straw biochar 3 parts of biological sulfur 0.6 parts of EM inoculant, 0.3 parts of EDTA-chelated iron.
[0014] The soil conditioner suitable for alkaline soils mentioned above, wherein the citric acid gypsum is in the form of a fine powder with an apparent density of 2.8 g / cm³. 3 Its parameters are as follows: calcium sulfate content 98.2%, silicon dioxide content 1%, and magnesium oxide content 0.4%. The zinc humic acid is extracted from weathered coal and lignite using microbial fermentation technology to obtain high-molecular-weight active humic acid, with a humic acid content ≥125g / L and a chelated zinc content ≥2g / L. The EDTA-chelated iron is a fine powder, a chelate formed by the coordination bond between iron ions and ethylenediaminetetraacetic acid (EDTA). It has an iron content of approximately 12.5%-13.5%, is easily soluble in water, has a pH value between 3.5 and 5.5, and is a yellow or brownish-yellow crystalline powder, odorless and tasteless.
[0015] The soil conditioner suitable for alkaline soils, and the preparation method of the composite nanomaterials are as follows: First, by weight, 10-20 parts of Zn(CH3COO)2·2H2O are dissolved in 100-200 parts of n-butylamine to obtain solution a; 5-15 parts of thiourea are dissolved in 50-100 parts of distilled water to prepare solution b; solution a is added to b and mixed thoroughly to carry out the reaction, then transferred to a round-bottom flask. The reaction solution is refluxed for 10-20 hours and then filtered. During the filtration and washing, the filter is washed 4 times with distilled water and finally washed once with ethanol. The resulting filter cake is placed in a beaker and dried for 6-10 hours; after drying at 45°C, the sample is ground into powder and stored in a centrifuge tube to obtain the final product.
[0016] A method for preparing a soil conditioner suitable for alkaline soils includes the following steps: (1) Citric acid gypsum is slurried by passing it through a slurry generator to obtain citric acid gypsum slurry; (2) The citric acid gypsum slurry obtained in step (1) is passed through a filter press to obtain a mud cake; (3) The mud cake obtained in step (2) is mixed with zinc humic acid, boric acid, modified polyaspartic acid calcium salt, astaxanthin, composite nanomaterials, straw biochar, bio-sulfur, EM bacteria agent, and EDTA chelated iron, and mixed in a mixing box. Then, it is ultra-finely pulverized using an ultra-fine pulverizer and stirred with a high-speed stirrer to make its components uniform. (4) The uniformly mixed materials are extruded and granulated into uniformly sized granules, and then packaged to obtain granular soil conditioner suitable for alkaline soil.
[0017] In the preparation method of the soil conditioner suitable for alkaline soil, the mass percentage of citric acid gypsum slurry in step (1) is 40%-55%.
[0018] 3. Beneficial effects
[0019] Compared with the prior art, the beneficial effects of the present invention are as follows: This invention introduces composite nanomaterials and composite microbial agents into traditional basic fertilizers, effectively improving alkaline soils. These fertilizers not only effectively enhance cucumber quality but also prevent infection by *Cyclocarya paliurus*. Alkaline soils typically have high pH and high salinity, leading to compact soil structure, nutrient deficiency, and restricted plant root systems. These factors limit normal plant growth and development, posing challenges to agricultural yields and sustainable land use. Soil conditioners are a key means of improving soil properties and texture. By adding appropriate conditioners, the chemical, physical, and biological properties of the soil can be altered, improving soil fertility, water retention capacity, and permeability, providing a better growing environment for plants. Using this soil conditioner is expected to achieve the following improvements: regulating soil pH and neutralizing alkaline soils; improving soil structure, increasing soil permeability and water retention capacity; providing essential nutrients for plants and increasing soil fertility; reducing soil salinity and improving soil texture; promoting plant growth and development; and increasing crop yield and quality. Detailed Implementation
[0020] The present invention will be further described below with reference to specific embodiments.
[0021] It should be noted that the EM agent was purchased from Dongyiyang (Jinan) New Material Co., Ltd., item number: 0133.
[0022] Example 1
[0023] Soil conditioner suitable for alkaline soils, by weight, comprises the following ingredients: 100 parts of citric acid gypsum 80 parts zinc humic acid 30 parts boric acid 30 parts of modified polyaspartic calcium salt 17 servings of astaxanthin 16 parts of composite nanomaterials, 5 portions of straw biochar 4 portions of biological sulfur 0.2 parts of EM bacterial agent, 0.2 parts of EDTA chelated iron.
[0024] The soil conditioner suitable for alkaline soils mentioned above, wherein the citric acid gypsum is in the form of a fine powder with an apparent density of 1.2 g / cm³. 3Its parameters are as follows: calcium sulfate content 98.2%, silicon dioxide content 1%, and magnesium oxide content 0.4%. The zinc humic acid is extracted from weathered coal and lignite using microbial fermentation technology to obtain high-molecular-weight active humic acid, with a humic acid content ≥125g / L and a chelated zinc content ≥2g / L. The EDTA-chelated iron is a fine powder, a chelate formed by the coordination bond between iron ions and ethylenediaminetetraacetic acid (EDTA). It has an iron content of approximately 12.5%-13.5%, is easily soluble in water, has a pH value between 3.5 and 5.5, and is a yellow or brownish-yellow crystalline powder, odorless and tasteless.
[0025] The soil conditioner suitable for alkaline soils, and the preparation method of the composite nanomaterials are as follows: First, by weight, 10 parts of Zn(CH3COO)2·2H2O were dissolved in 200 parts of n-butylamine to obtain solution a; 5 parts of thiourea were dissolved in 100 parts of distilled water to prepare solution b; solution a was added to b and mixed thoroughly to carry out the reaction, then transferred to a round-bottom flask, and the reaction solution was refluxed for 10 hours and then filtered. The filter cake was washed 4 times with distilled water and finally washed once with ethanol. The resulting filter cake was placed in a beaker and dried for 10 hours; the sample was dried at 45°C and then ground into powder and stored in a centrifuge tube to obtain the final product.
[0026] A method for preparing a soil conditioner suitable for alkaline soils includes the following steps: (1) Citric acid gypsum is slurried by passing it through a slurry generator to obtain citric acid gypsum slurry; (2) The citric acid gypsum slurry obtained in step (1) is passed through a filter press to obtain a mud cake; (3) The mud cake obtained in step (2) is mixed with zinc humic acid, boric acid, modified polyaspartic acid calcium salt, astaxanthin, composite nanomaterials, straw biochar, bio-sulfur, EM bacteria agent, and EDTA chelated iron, and mixed in a mixing box. Then, it is ultra-finely pulverized using an ultra-fine pulverizer and stirred with a high-speed stirrer to make its components uniform. (4) The uniformly mixed materials are extruded and granulated into uniformly sized granules, and then packaged to obtain granular soil conditioner suitable for alkaline soil.
[0027] In the preparation method of the soil conditioner suitable for alkaline soil, the mass percentage of citric acid gypsum slurry in step (1) is 40%.
[0028] Example 2
[0029] Soil conditioner suitable for alkaline soils, by weight, comprises the following ingredients: 200 parts of citric acid gypsum 40 parts zinc humic acid 60 parts boric acid 32 parts of modified polyaspartic calcium salt 18 servings of astaxanthin 10 parts of composite nanomaterials 10 portions of straw biochar 1 part of biological sulfur, 0.8 parts of EM inoculant, 0.3 parts of EDTA-chelated iron.
[0030] The soil conditioner suitable for alkaline soils mentioned above, wherein the citric acid gypsum is in the form of a fine powder with an apparent density of 1.2 g / cm³. 3 Its parameters are as follows: calcium sulfate content 98.2%, silicon dioxide content 1%, and magnesium oxide content 0.4%. The zinc humic acid is extracted from weathered coal and lignite using microbial fermentation technology to obtain high-molecular-weight active humic acid, with a humic acid content ≥125g / L and a chelated zinc content ≥2g / L. The EDTA-chelated iron is a fine powder, a chelate formed by the coordination bond between iron ions and ethylenediaminetetraacetic acid (EDTA). It has an iron content of approximately 12.5%-13.5%, is easily soluble in water, has a pH value between 3.5 and 5.5, and is a yellow or brownish-yellow crystalline powder, odorless and tasteless.
[0031] The soil conditioner suitable for alkaline soils, and the preparation method of the composite nanomaterials are as follows: By weight, first weigh 20 parts of Zn(CH3COO)2·2H2O and dissolve them in 100 parts of n-butylamine to obtain solution a; weigh 15 parts of thiourea and dissolve them in 50 parts of distilled water to prepare solution b; add solution a to b and mix thoroughly to carry out the reaction, then transfer to a round-bottom flask, reflux the reaction solution for 20 hours and then filter it. Wash the filter with distilled water 4 times and finally wash it with ethanol once. Place the obtained filter cake in a beaker and dry it for 6 hours; after drying the sample at 45℃, grind it into powder and store it in a centrifuge tube to obtain the final product.
[0032] A method for preparing a soil conditioner suitable for alkaline soils includes the following steps: (1) Citric acid gypsum is slurried by passing it through a slurry generator to obtain citric acid gypsum slurry; (2) The citric acid gypsum slurry obtained in step (1) is passed through a filter press to obtain a mud cake; (3) The mud cake obtained in step (2) is mixed with zinc humic acid, boric acid, modified polyaspartic acid calcium salt, astaxanthin, composite nanomaterials, straw biochar, bio-sulfur, EM bacteria agent, and EDTA chelated iron, and mixed in a mixing box. Then, it is ultra-finely pulverized using an ultra-fine pulverizer and stirred with a high-speed stirrer to make its components uniform. (4) The uniformly mixed materials are extruded and granulated into uniformly sized granules, and then packaged to obtain granular soil conditioner suitable for alkaline soil.
[0033] In the preparation method of the soil conditioner suitable for alkaline soil, the mass percentage of citric acid gypsum slurry in step (1) is 55%.
[0034] Example 3
[0035] Soil conditioner suitable for alkaline soils, by weight, comprises the following ingredients: 120 parts of citric acid gypsum 70 parts zinc humic acid 40 parts boric acid 15 parts of modified polyaspartic calcium salt 13 servings of astaxanthin 16 parts of composite nanomaterials, 5 portions of straw biochar 4 portions of biological sulfur 0.2 parts of EM bacterial agent, 0.4 parts of EDTA iron.
[0036] The soil conditioner suitable for alkaline soils mentioned above, wherein the citric acid gypsum is in the form of a fine powder with an apparent density of 1.2 g / cm³. 3 Its parameters are as follows: calcium sulfate content 98.2%, silicon dioxide content 1%, and magnesium oxide content 0.4%. The zinc humic acid is extracted from weathered coal and lignite using microbial fermentation technology to obtain high-molecular-weight active humic acid, with a humic acid content ≥125g / L and a chelated zinc content ≥2g / L. The EDTA-chelated iron is a fine powder, a chelate formed by the coordination bond between iron ions and ethylenediaminetetraacetic acid (EDTA). It has an iron content of approximately 12.5%-13.5%, is easily soluble in water, has a pH value between 3.5 and 5.5, and is a yellow or brownish-yellow crystalline powder, odorless and tasteless.
[0037] The soil conditioner suitable for alkaline soils, and the preparation method of the composite nanomaterials are as follows: First, by weight, 10 parts of Zn(CH3COO)2·2H2O were dissolved in 100 parts of n-butylamine to obtain solution a; 5 parts of thiourea were dissolved in 50-100 parts of distilled water to prepare solution b; solution a was added to b and mixed thoroughly to carry out the reaction, then transferred to a round-bottom flask, and the reaction solution was refluxed for 10 hours and then filtered. The filter cake was washed 4 times with distilled water and finally washed once with ethanol. The resulting filter cake was placed in a beaker and dried for 6 hours; the sample was dried at 45°C and then ground into powder and stored in a centrifuge tube to obtain the final product.
[0038] A method for preparing a soil conditioner suitable for alkaline soils includes the following steps: (1) Citric acid gypsum is slurried by passing it through a slurry generator to obtain citric acid gypsum slurry; (2) The citric acid gypsum slurry obtained in step (1) is passed through a filter press to obtain a mud cake; (3) The mud cake obtained in step (2) is mixed with zinc humic acid, boric acid, modified polyaspartic acid calcium salt, astaxanthin, composite nanomaterials, straw biochar, bio-sulfur, EM bacteria agent, and EDTA chelated iron, and mixed in a mixing box. Then, it is ultra-finely pulverized using an ultra-fine pulverizer and stirred with a high-speed stirrer to make its components uniform. (4) The uniformly mixed materials are extruded and granulated into uniformly sized granules, and then packaged to obtain granular soil conditioner suitable for alkaline soil.
[0039] In the method for preparing the soil conditioner suitable for alkaline soil, the mass percentage of citric acid gypsum slurry in step (1) is 45%.
[0040] Example 4
[0041] Soil conditioner suitable for alkaline soils, by weight, comprises the following ingredients: 160 parts of citric acid gypsum 50 parts zinc humic acid 50 parts boric acid 25 parts of modified polyaspartic calcium salt, 15 servings of astaxanthin 13 portions of composite nanomaterials, 10 portions of straw biochar 1 part of biological sulfur, 0.8 parts of EM inoculant, 0.3 parts of EDTA-chelated iron.
[0042] The soil conditioner suitable for alkaline soils mentioned above, wherein the citric acid gypsum is in the form of a fine powder with an apparent density of 2.8 g / cm³. 3 Its parameters are as follows: the soil conditioner suitable for alkaline soils, wherein the citric acid gypsum is in fine powder form with an apparent density of 1.2 g / cm³. 3Its parameters are as follows: calcium sulfate content 98.2%, silicon dioxide content 1%, and magnesium oxide content 0.4%. The zinc humic acid is extracted from weathered coal and lignite using microbial fermentation technology to obtain high-molecular-weight active humic acid, with a humic acid content ≥125g / L and a chelated zinc content ≥2g / L. The EDTA-chelated iron is a fine powder, a chelate formed by the coordination bond between iron ions and ethylenediaminetetraacetic acid (EDTA). It has an iron content of approximately 12.5%-13.5%, is easily soluble in water, has a pH value between 3.5 and 5.5, and is a yellow or brownish-yellow crystalline powder, odorless and tasteless.
[0043] The soil conditioner suitable for alkaline soils, and the preparation method of the composite nanomaterials are as follows: By weight, first weigh 20 parts of Zn(CH3COO)2·2H2O and dissolve them in 200 parts of n-butylamine to obtain solution a; weigh 15 parts of thiourea and dissolve them in 100 parts of distilled water to prepare solution b; add solution a to b and mix thoroughly to react, then transfer to a round-bottom flask, reflux the reaction solution for 20 hours and then filter it. Wash the filter with distilled water 4 times and finally wash it with ethanol once. Place the resulting filter cake in a beaker and dry it for 10 hours; after drying the sample at 45℃, grind it into powder and store it in a centrifuge tube to obtain the final product.
[0044] A method for preparing a soil conditioner suitable for alkaline soils includes the following steps: (1) Citric acid gypsum is slurried by passing it through a slurry generator to obtain citric acid gypsum slurry; (2) The citric acid gypsum slurry obtained in step (1) is passed through a filter press to obtain a mud cake; (3) The mud cake obtained in step (2) is mixed with zinc humic acid, boric acid, modified polyaspartic acid calcium salt, astaxanthin, composite nanomaterials, straw biochar, bio-sulfur, EM bacteria agent, and EDTA chelated iron, and mixed in a mixing box. Then, it is ultra-finely pulverized using an ultra-fine pulverizer and stirred with a high-speed stirrer to make its components uniform. (4) The uniformly mixed materials are extruded and granulated into uniformly sized granules, and then packaged to obtain granular soil conditioner suitable for alkaline soil.
[0045] In the preparation method of the soil conditioner suitable for alkaline soil, the mass percentage of citric acid gypsum slurry in step (1) is 40%-55%.
[0046] Example 5
[0047] Soil conditioner suitable for alkaline soils, by weight, comprises the following ingredients: 140 parts of citric acid gypsum 60 parts zinc humic acid 45 parts boric acid 19 parts of modified polyaspartic calcium salt, 14 servings of astaxanthin 15 parts of composite nanomaterials, 8 portions of straw biochar 3 parts of biological sulfur 0.6 parts of EM bacterial agent, 0.3 parts of EDTA-chelated iron.
[0048] The soil conditioner suitable for alkaline soils mentioned above, wherein the citric acid gypsum is in the form of a fine powder with an apparent density of 2.8 g / cm³. 3 Its parameters are as follows: the soil conditioner suitable for alkaline soils, wherein the citric acid gypsum is in fine powder form with an apparent density of 1.2 g / cm³. 3 Its parameters are as follows: calcium sulfate content 98.2%, silicon dioxide content 1%, and magnesium oxide content 0.4%. The zinc humic acid is extracted from weathered coal and lignite using microbial fermentation technology to obtain high-molecular-weight active humic acid, with a humic acid content ≥125g / L and a chelated zinc content ≥2g / L. The EDTA-chelated iron is a fine powder, a chelate formed by the coordination bond between iron ions and ethylenediaminetetraacetic acid (EDTA). It has an iron content of approximately 12.5%-13.5%, is easily soluble in water, has a pH value between 3.5 and 5.5, and is a yellow or brownish-yellow crystalline powder, odorless and tasteless.
[0049] The soil conditioner suitable for alkaline soils, and the preparation method of the composite nanomaterials are as follows: First, by weight, 15 parts of Zn(CH3COO)2·2H2O were dissolved in 150 parts of n-butylamine to obtain solution a; 10 parts of thiourea were dissolved in 80 parts of distilled water to prepare solution b; solution a was added to b and mixed thoroughly to carry out the reaction, then transferred to a round-bottom flask, and the reaction solution was refluxed for 15 hours and then filtered. The filter cake was washed 4 times with distilled water and finally washed once with ethanol. The resulting filter cake was placed in a beaker and dried for 8 hours; the sample was dried at 45°C and then ground into powder and stored in a centrifuge tube to obtain the final product.
[0050] A method for preparing a soil conditioner suitable for alkaline soils includes the following steps: (1) Citric acid gypsum is slurried by passing it through a slurry generator to obtain citric acid gypsum slurry; (2) The citric acid gypsum slurry obtained in step (1) is passed through a filter press to obtain a mud cake; (3) The mud cake obtained in step (2) is mixed with zinc humic acid, boric acid, modified polyaspartic acid calcium salt, astaxanthin, composite nanomaterials, straw biochar, bio-sulfur, EM bacteria agent, and EDTA chelated iron, and mixed in a mixing box. Then, it is ultra-finely pulverized using an ultra-fine pulverizer and stirred with a high-speed stirrer to make its components uniform. (4) The uniformly mixed materials are extruded and granulated into uniformly sized granules, and then packaged to obtain granular soil conditioner suitable for alkaline soil.
[0051] In the preparation method of the soil conditioner suitable for alkaline soil, the mass percentage of citric acid gypsum slurry in step (1) is 50%.
[0052] Comparative Example 1
[0053] Soil conditioner suitable for alkaline soils, by weight, comprises the following ingredients: 140 parts of citric acid gypsum 45 parts zinc humic acid 18 parts of modified polyaspartic calcium salt 10 servings of astaxanthin 15 parts of composite nanomaterials, 8 portions of straw biochar 3 parts of biological sulfur 0.6 parts of EM inoculant, 0.3 parts of EDTA-chelated iron.
[0054] The soil conditioner suitable for alkaline soils mentioned above, wherein the citric acid gypsum is in the form of a fine powder with an apparent density of 2.8 g / cm³. 3 The soil conditioner, with parameters as described below, is suitable for alkaline soils. The citric acid gypsum is a fine powder with an apparent density of 1.2 g / cm³. 3 Its parameters are as follows: calcium sulfate content 98.2%, silicon dioxide content 1%, and magnesium oxide content 0.4%. The zinc humic acid is extracted from weathered coal and lignite using microbial fermentation technology to obtain high-molecular-weight active humic acid, with a humic acid content ≥125g / L and a chelated zinc content ≥2g / L. The EDTA-chelated iron is a fine powder, a chelate formed by the coordination bond between iron ions and ethylenediaminetetraacetic acid (EDTA). It has an iron content of approximately 12.5%-13.5%, is easily soluble in water, has a pH value between 3.5 and 5.5, and is a yellow or brownish-yellow crystalline powder, odorless and tasteless.
[0055] The soil conditioner suitable for alkaline soils, and the preparation method of the composite nanomaterials are as follows: By weight, first weigh 15 parts of Zn(CH3COO)2·2H2O and dissolve them in 150 parts of n-butylamine to obtain solution a; weigh 10 parts of thiourea and dissolve them in 80 parts of distilled water to prepare solution b; add solution a to b and mix thoroughly to carry out the reaction, then transfer to a round-bottom flask, reflux the reaction solution for 15 hours and then filter it. Wash the filter with distilled water 4 times and finally wash it with ethanol once. Place the obtained filter cake in a beaker and dry it for 8 hours; after drying the sample at 45°C, grind it into powder and store it in a centrifuge tube to obtain the final product.
[0056] A method for preparing a soil conditioner suitable for alkaline soils includes the following steps: (1) Citric acid gypsum is slurried by passing it through a slurry generator to obtain citric acid gypsum slurry; (2) The citric acid gypsum slurry obtained in step (1) is passed through a filter press to obtain a mud cake; (3) The mud cake obtained in step (2) is mixed with zinc humic acid, boric acid, modified polyaspartic acid calcium salt, astaxanthin, composite nanomaterials, straw biochar, bio-sulfur, EM bacteria agent, and EDTA chelated iron, and mixed in a mixing box. Then, it is ultra-finely pulverized using an ultra-fine pulverizer and stirred with a high-speed stirrer to make its components uniform. (4) The uniformly mixed materials are extruded and granulated into uniformly sized granules, and then packaged to obtain granular soil conditioner suitable for alkaline soil.
[0057] In the preparation method of the soil conditioner suitable for alkaline soil, the mass percentage of citric acid gypsum slurry in step (1) is 50%.
[0058] Comparative Example 2
[0059] Soil conditioner suitable for alkaline soils, by weight, comprises the following ingredients: 140 parts of citric acid gypsum 60 parts zinc humic acid 24 parts of modified polyaspartic acid calcium salt 13 servings of astaxanthin 45 parts boric acid 15 parts of composite nanomaterials, 8 portions of straw biochar 3 parts of biological sulfur 0.6 parts of EM inoculant, 0.2 parts of EDTA chelated iron.
[0060] The soil conditioner suitable for alkaline soils mentioned above, wherein the citric acid gypsum is in the form of a fine powder with an apparent density of 2.8 g / cm³. 3Its parameters are as follows: the soil conditioner suitable for alkaline soils, wherein the citric acid gypsum is in fine powder form with an apparent density of 1.2 g / cm³. 3 Its parameters are as follows: calcium sulfate content 98.2%, silicon dioxide content 1%, and magnesium oxide content 0.4%. The zinc humic acid is extracted from weathered coal and lignite using microbial fermentation technology to obtain high-molecular-weight active humic acid, with a humic acid content ≥125g / L and a chelated zinc content ≥2g / L. The EDTA-chelated iron is a fine powder, a chelate formed by the coordination bond between iron ions and ethylenediaminetetraacetic acid (EDTA). It has an iron content of approximately 12.5%-13.5%, is easily soluble in water, has a pH value between 3.5 and 5.5, and is a yellow or brownish-yellow crystalline powder, odorless and tasteless.
[0061] The soil conditioner suitable for alkaline soils, and the preparation method of the composite nanomaterials are as follows: By weight, first weigh 15 parts of Zn(CH3COO)2·2H2O and dissolve them in 150 parts of n-butylamine to obtain solution a; weigh 10 parts of thiourea and dissolve them in 80 parts of distilled water to prepare solution b; add solution a to b and mix thoroughly to carry out the reaction, then transfer to a round-bottom flask, reflux the reaction solution for 15 hours and then filter it. Wash the filter with distilled water 4 times and finally wash it with ethanol once. Place the obtained filter cake in a beaker and dry it for 8 hours; after drying the sample at 45°C, grind it into powder and store it in a centrifuge tube to obtain the final product.
[0062] A method for preparing a soil conditioner suitable for alkaline soils includes the following steps: (1) Citric acid gypsum is slurried by passing it through a slurry generator to obtain citric acid gypsum slurry; (2) The citric acid gypsum slurry obtained in step (1) is passed through a filter press to obtain a mud cake; (3) The mud cake obtained in step (2) is mixed with zinc humic acid, boric acid, modified polyaspartic acid calcium salt, astaxanthin, composite nanomaterials, straw biochar, bio-sulfur, EM bacteria agent, and EDTA chelated iron, and mixed in a mixing box. Then, it is ultra-finely pulverized using an ultra-fine pulverizer and stirred with a high-speed stirrer to make its components uniform. (4) The uniformly mixed materials are extruded and granulated into uniformly sized granules, and then packaged to obtain granular soil conditioner suitable for alkaline soil.
[0063] In the preparation method of the soil conditioner suitable for alkaline soil, the mass percentage of citric acid gypsum slurry in step (1) is 50%.
[0064] Comparative Example 3
[0065] Soil conditioner suitable for alkaline soils, by weight, comprises the following ingredients: 140 parts of citric acid gypsum 60 parts zinc humic acid 45 parts boric acid 30 parts of modified polyaspartic calcium salt 12 servings of astaxanthin 15 parts of composite nanomaterials, 8 portions of straw biochar 3 parts of biological sulfur 0.6 parts of EM bacterial agent, 0.4 parts of EDTA-chelated iron.
[0066] The soil conditioner suitable for alkaline soils mentioned above, wherein the citric acid gypsum is in the form of a fine powder with an apparent density of 2.8 g / cm³. 3 Its parameters are as follows: the soil conditioner suitable for alkaline soils, wherein the citric acid gypsum is in fine powder form with an apparent density of 1.2 g / cm³. 3 Its parameters are as follows: calcium sulfate content 98.2%, silicon dioxide content 1%, and magnesium oxide content 0.4%. The zinc humic acid is extracted from weathered coal and lignite using microbial fermentation technology to obtain high-molecular-weight active humic acid, with a humic acid content ≥125g / L and a chelated zinc content ≥2g / L. The EDTA-chelated iron is a fine powder, a chelate formed by the coordination bond between iron ions and ethylenediaminetetraacetic acid (EDTA). It has an iron content of approximately 12.5%-13.5%, is easily soluble in water, has a pH value between 3.5 and 5.5, and is a yellow or brownish-yellow crystalline powder, odorless and tasteless.
[0067] The soil conditioner suitable for alkaline soils, and the preparation method of the composite nanomaterials are as follows: By weight, first weigh 15 parts of Zn(CH3COO)2·2H2O and dissolve them in 150 parts of n-butylamine to obtain solution a; weigh 10 parts of polyvinyl alcohol and dissolve them in 80 parts of distilled water to prepare solution b; add solution a to b and mix thoroughly to react, then transfer to a round-bottom flask, reflux the reaction solution for 15 hours and then filter it. Wash the filter with distilled water 4 times and finally wash it with ethanol once. Place the resulting filter cake in a beaker and dry it for 8 hours; after drying the sample at 45°C, grind it into powder and store it in a centrifuge tube to obtain the final product.
[0068] A method for preparing a soil conditioner suitable for alkaline soils includes the following steps: (1) Citric acid gypsum is slurried by passing it through a slurry generator to obtain citric acid gypsum slurry; (2) The citric acid gypsum slurry obtained in step (1) is passed through a filter press to obtain a mud cake; (3) The mud cake obtained in step (2) is mixed with zinc humic acid, boric acid, modified polyaspartic acid calcium salt, astaxanthin, composite nanomaterials, straw biochar, bio-sulfur, EM bacteria agent, and EDTA chelated iron, and mixed in a mixing box. Then, it is ultra-finely pulverized using an ultra-fine pulverizer and stirred with a high-speed stirrer to make its components uniform. (4) The uniformly mixed materials are extruded and granulated into uniformly sized granules, and then packaged to obtain granular soil conditioner suitable for alkaline soil.
[0069] In the preparation method of the soil conditioner suitable for alkaline soil, the mass percentage of citric acid gypsum slurry in step (1) is 50%.
[0070] Comparative Example 4
[0071] Soil conditioner suitable for alkaline soils, by weight, comprises the following ingredients: 140 parts of citric acid gypsum 60 parts zinc humic acid 45 parts boric acid 32 parts of modified polyaspartic acid calcium salt 13 servings of astaxanthin 15 parts of composite nanomaterials, 8 portions of straw biochar 3 parts of biological sulfur 0.6 parts of EM bacterial agent, 0.4 parts of EDTA-chelated iron.
[0072] The soil conditioner suitable for alkaline soils mentioned above, wherein the citric acid gypsum is in the form of a fine powder with an apparent density of 2.8 g / cm³. 3 Its parameters are as follows: the soil conditioner suitable for alkaline soils, wherein the citric acid gypsum is in fine powder form with an apparent density of 1.2 g / cm³. 3 Its parameters are as follows: calcium sulfate content 98.2%, silicon dioxide content 1%, and magnesium oxide content 0.4%. The zinc humic acid is extracted from weathered coal and lignite using microbial fermentation technology to obtain high-molecular-weight active humic acid, with a humic acid content ≥125g / L and a chelated zinc content ≥2g / L. The EDTA-chelated iron is a fine powder, a chelate formed by the coordination bond between iron ions and ethylenediaminetetraacetic acid (EDTA). It has an iron content of approximately 12.5%-13.5%, is easily soluble in water, has a pH value between 3.5 and 5.5, and is a yellow or brownish-yellow crystalline powder, odorless and tasteless.
[0073] The soil conditioner suitable for alkaline soils, and the preparation method of the composite nanomaterials are as follows: By weight, first weigh 15 parts of Zn(CH3COO)2·2H2O and dissolve them in 150 parts of n-butylamine to obtain solution a; weigh 10 parts of thiourea and dissolve them in 80 parts of distilled water to prepare solution b; add solution a to b and mix thoroughly to carry out the reaction, then transfer to a round-bottom flask, reflux the reaction solution for 15 hours and then filter it. Wash the filter with distilled water 4 times and finally wash it with ethanol once. Place the obtained filter cake in a beaker and dry it for 8 hours; after drying the sample at 45°C, grind it into powder and store it in a centrifuge tube to obtain the final product.
[0074] A method for preparing a soil conditioner suitable for alkaline soils includes the following steps: (1) Citric acid gypsum is slurried by passing it through a slurry generator to obtain citric acid gypsum slurry; (2) The citric acid gypsum slurry obtained in step (1) is passed through a filter press to obtain a mud cake; (3) The mud cake obtained in step (2) is mixed with zinc humic acid, boric acid, modified polyaspartic acid calcium salt, astaxanthin, composite nanomaterials, straw biochar, bio-sulfur, EM bacteria agent, and EDTA chelated iron, and mixed in a mixing box. Then, it is ultra-finely pulverized using an ultra-fine pulverizer and stirred with a high-speed stirrer to make its components uniform. (4) The uniformly mixed materials are extruded and granulated into uniformly sized granules, and then packaged to obtain granular soil conditioner suitable for alkaline soil.
[0075] In the preparation method of the soil conditioner suitable for alkaline soil, the mass percentage of citric acid gypsum slurry in step (1) is 50%.
[0076] Comparative Example 5
[0077] Soil conditioner suitable for alkaline soils, by weight, comprises the following ingredients: 140 parts of citric acid gypsum 60 parts zinc humic acid 45 parts boric acid 35 parts of modified polyaspartic calcium salt 20 servings of astaxanthin 8 portions of straw biochar 3 parts of biological sulfur 0.6 parts of EM inoculant, 0.5 parts of EDTA-chelated iron.
[0078] The soil conditioner suitable for alkaline soils mentioned above, wherein the citric acid gypsum is in the form of a fine powder with an apparent density of 1.2 g / cm³. 3Its parameters are as follows: calcium sulfate content 98.2%, silicon dioxide content 1%, and magnesium oxide content 0.4%. The zinc humic acid is extracted from weathered coal and lignite using microbial fermentation technology to obtain high-molecular-weight active humic acid, with a humic acid content ≥125g / L and a chelated zinc content ≥2g / L. The EDTA-chelated iron is a fine powder, a chelate formed by the coordination bond between iron ions and ethylenediaminetetraacetic acid (EDTA). It has an iron content of approximately 12.5%-13.5%, is easily soluble in water, has a pH value between 3.5 and 5.5, and is a yellow or brownish-yellow crystalline powder, odorless and tasteless.
[0079] A method for preparing a soil conditioner suitable for alkaline soils includes the following steps: (1) Citric acid gypsum is slurried by passing it through a slurry generator to obtain citric acid gypsum slurry; (2) The citric acid gypsum slurry obtained in step (1) is passed through a filter press to obtain a mud cake; (3) The mud cake obtained in step (2) is mixed with zinc humic acid, boric acid, modified polyaspartic acid calcium salt, astaxanthin, composite nanomaterials, straw biochar, bio-sulfur, EM bacteria agent, and EDTA chelated iron, and mixed in a mixing box. Then, it is ultra-finely pulverized using an ultra-fine pulverizer and stirred with a high-speed stirrer to make its components uniform. (4) The uniformly mixed materials are extruded and granulated into uniformly sized granules, and then packaged to obtain granular soil conditioner suitable for alkaline soil.
[0080] In the preparation method of the soil conditioner suitable for alkaline soil, the mass percentage of phosphorus tail slurry citric acid gypsum slurry in step (1) is 50%.
[0081] Example 6
[0082] The soil conditioners prepared in Examples 1-5 and Comparative Examples 1-5 were subjected to the following tests: The specific testing method is as follows: A cucumber test site in Hefei, Anhui Province (alkaline pH value of 8.6) was selected. Healthy cucumber vines (in the initial flowering stage, cucumber seeds purchased from Tianjin Deruit Seed Industry Co., Ltd., variety "Open Field Cucumber Seeds - Deruit 10") were transplanted and the above-mentioned soil conditioner was applied (2 kg of soil conditioner and 10 kg of urea per square meter of alkaline soil). Subsequently, during the fruiting period of the cucumber vines, an infection test of Corynebacterium cucumeris was conducted to observe the characteristics of the cucumbers and determine their quality.
[0083] Table 1 Test Report
[0084]
[0085] The experiment showed (in conjunction with Table 1) that, compared with Comparative Examples 1-5, Examples 1-5 had higher yield per plant (range 7.6 kg-8.3 kg), higher average fruit set rate (range 89%-94%), lower average infection rate (range 4.6%-5.0%), and improved soil pH (range 6.8-7.0). It can be seen that the fertilizers prepared in Examples 1-5 can effectively improve the quality of cucumbers and prevent infection by Corynebacterium cucumeritum. Among them, the fertilizers prepared in Example 5 showed relatively large differences in various indicators.
[0086] In summary, this invention introduces composite nanomaterials and composite microbial agents into traditional basic fertilizers, which effectively improve alkaline soils. These fertilizers not only effectively enhance cucumber quality but also prevent infection by *Cyclocarya paliurus*. Alkaline soils typically have high pH and high salinity, leading to problems such as compact soil structure, nutrient deficiency, and restricted plant root systems. These factors limit normal plant growth and development, posing challenges to agricultural yields and sustainable land use. Soil conditioners are one of the key means to improve soil properties and texture. By adding appropriate conditioners, the chemical, physical, and biological properties of the soil can be altered, improving soil fertility, water retention capacity, and permeability, providing a better growth environment for plants. Using this soil conditioner is expected to achieve the following improvements: regulating soil pH and neutralizing alkaline soils; improving soil structure, increasing soil permeability and water retention capacity; providing the necessary nutrients for plants and increasing soil fertility; reducing soil salinity and improving soil texture; promoting plant growth and development; and increasing crop yield and quality.
[0087] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the invention can be implemented in other specific forms without departing from the spirit or essential characteristics of the invention. Therefore, the embodiments should be considered in all respects as exemplary and non-limiting, and the scope of the invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within the present invention.
[0088] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.
Claims
1. A soil conditioner suitable for alkaline soils, characterized in that: By weight, it includes the following ingredients: 100-200 parts citric acid gypsum 40-80 parts zinc humic acid 30-60 parts boric acid 15-35 parts of modified polyaspartic calcium salt, 10-20 parts astaxanthin 10-16 parts of composite nanomaterials 5-10 parts straw biochar 1-4 parts biological sulfur EM bacterial agent 0.2-0.8 parts, EDTA chelated iron 0.1-0.6 parts.
2. The soil conditioner for alkaline soils according to claim 1, characterized in that: By weight, it includes the following ingredients: 120-160 parts citric acid gypsum 50-70 parts zinc humic acid 40-50 parts boric acid 20-30 parts of modified polyaspartic calcium salt, Astaxanthin 12-18 parts 13-16 parts of composite nanomaterials 5-10 parts straw biochar 1-4 parts biological sulfur EM bacterial agent 0.2-0.8 parts, EDTA chelated iron 0.1-0.6 parts.
3. The soil conditioner suitable for alkaline soils according to claim 1, characterized in that: By weight, it includes the following ingredients: 140 parts of citric acid gypsum 60 parts zinc humic acid 45 parts boric acid 20 parts of modified polyaspartic calcium salt, 13 servings of astaxanthin 15 parts of composite nanomaterials, 8 portions of straw biochar 3 parts of biological sulfur 0.6 parts of EM inoculant, 0.3 parts of EDTA-chelated iron.
4. The soil conditioner suitable for alkaline soils according to claim 3, characterized in that: The citric acid gypsum is in the form of a fine powder with an apparent density of 2.8 g / cm³. 3 Its parameters are as follows: calcium sulfate content 98.2%, silicon dioxide content 1%, and magnesium oxide content 0.4%. The zinc humic acid is extracted from weathered coal and lignite using microbial fermentation technology to obtain high-molecular-weight active humic acid, with a humic acid content ≥125g / L and a chelated zinc content ≥2g / L. The EDTA-chelated iron is a fine powder, a chelate formed by the coordination bond between iron ions and ethylenediaminetetraacetic acid (EDTA). It has an iron content of approximately 12.5%-13.5%, is easily soluble in water, has a pH value between 3.5 and 5.5, and is a yellow or brownish-yellow crystalline powder, odorless and tasteless.
5. The soil conditioner suitable for alkaline soils according to claim 3, characterized in that: The preparation method of the composite nanomaterial is as follows: First, by weight, 10-20 parts of Zn(CH3COO)2·2H2O are dissolved in 100-200 parts of n-butylamine to obtain solution a; 5-15 parts of thiourea are dissolved in 50-100 parts of distilled water to prepare solution b; solution a is added to b and mixed thoroughly to carry out the reaction, then transferred to a round-bottom flask. The reaction solution is refluxed for 10-20 hours and then filtered. During the filtration and washing, the filter is washed 4 times with distilled water and finally washed once with ethanol. The resulting filter cake is placed in a beaker and dried for 6-10 hours; after drying at 45°C, the sample is ground into powder and stored in a centrifuge tube to obtain the final product.
6. A method for preparing a soil conditioner suitable for alkaline soils, comprising the following steps: (1) Citric acid gypsum is slurried by passing it through a slurry generator to obtain citric acid gypsum slurry; (2) The citric acid gypsum slurry obtained in step (1) is passed through a filter press to obtain a mud cake; (3) The mud cake obtained in step (2) is mixed with zinc humic acid, boric acid, modified polyaspartic acid calcium salt, astaxanthin, composite nanomaterials, straw biochar, bio-sulfur, EM bacteria agent, and EDTA chelated iron, and mixed in a mixing tank. Then, it is ultra-finely pulverized using an ultra-fine pulverizer and stirred with a high-speed stirrer to make its components uniform. (4) The uniformly mixed materials are extruded and granulated into uniformly sized granules, and then packaged to obtain granular soil conditioner suitable for alkaline soil.
7. The method for preparing the soil conditioner suitable for alkaline soil according to claim 6, characterized in that: In step (1), the mass percentage of citric acid gypsum slurry is 40%-55%.