Soil conditioner as well as preparation method and application thereof

Abstract

The invention provides a soil conditioner as well as a preparation method and application thereof, and belongs to the technical field of soil remediation. The soil conditioner is prepared from the following raw materials in parts by weight: 24 to 550 parts of SiO2, 100 to 150 parts of Al2O3, 10 to 30 parts of Fe2O3, 9 to 25 parts of FeO and 1 to 6 parts of TiO2. All the raw materials of the soil conditioner have a synergistic effect, so that the pH value of soil is increased, acidified soil is improved, the content of organic matters in the soil can be increased, and the enzymatic activity in the soil can be adjusted, so that the improvement effect of the acidified soil is improved, a better environment is provided for growth of crops, and the yield and quality of the crops are improved.

Description

Technical Field

[0001] The present invention belongs to the technical field of soil remediation, and in particular relates to a soil conditioner and a preparation method and application thereof. Background Art

[0002] Soil provides fertility and a living environment for the growth of crops. As a complex ecosystem, soil has deteriorated in its rational shape and reduced its fertility due to irrational use of arable land and uncontrolled use of fertilizers and pesticides, especially soil acidification, compaction, and reduced organic matter content, which have an adverse effect on the normal growth of crops. Among them, soil acidification has aggravated the increase in soil acidity, caused a decrease in the content of a large number of soil nutrients, and reduced soil fertility, which seriously affected the yield and quality of crops.

[0003] The main reasons for soil acidification include: heavy precipitation, which causes the base ions to be dissolved after being washed away, resulting in serious loss. This causes the base ions to be unable to exchange with the exchangeable ions normally, and the H + The amount will be relatively reduced and cannot react with the aluminum compounds in the soil. Over time, the exchange acid in the soil will accumulate in large quantities, causing serious soil acidification.

[0004] In order to improve soil acidification, increase the organic matter in the soil, and effectively avoid the decline of crop products and their quality due to soil acidification or decreased fertility, it is urgent to provide a soil conditioner to improve soil acidity and increase soil fertility. Summary of the invention

[0005] In view of this, the object of the present invention is to provide a soil conditioner and a preparation method and application thereof, wherein the soil conditioner can effectively improve acidified soil and increase the organic matter in the soil.

[0006] In order to achieve the above-mentioned object of the invention, the present invention provides the following technical solutions:

[0007] The present invention provides a soil conditioner, which is made of the following raw materials in parts by weight: SiO 2 450~550 parts, Al 2 O 3 100-150 parts, Fe 2 O 3 10-30 parts, FeO 9-25 parts and TiO 2 1 to 6 servings.

[0008] Preferably, the soil conditioner is made of the following raw materials in parts by weight: SiO 2 470~520 parts, Al 2 O 3 110-140 parts, Fe 2 O 315-25 parts, FeO 12-22 parts and TiO 2 2 to 5 servings.

[0009] The present invention also provides a method for preparing the soil conditioner, comprising the following steps:

[0010] The SiO 2 、Al 2 O 3 , Fe 2 O 3 , FeO and TiO 2 After mixing, a soil conditioner is obtained.

[0011] Preferably, before the mixing, the SiO 2 、Al 2 O 3 , Fe 2 O 3 , FeO and TiO 2 The steps of crushing and sieving.

[0012] Preferably, the mesh size of the sieving is 750-850 meshes.

[0013] The present invention also provides an application of the soil conditioner or the preparation method in improving acidified soil.

[0014] The present invention also provides an application of the soil conditioner or the preparation method in increasing soil organic matter.

[0015] The present invention also provides an application of the soil conditioner or the preparation method in regulating soil enzyme activity.

[0016] Preferably, the regulation is increase, and the soil enzyme is soil sucrase.

[0017] Compared with the prior art, the present invention has the following beneficial effects:

[0018] The present invention provides a soil conditioner and a preparation method and application thereof. The raw materials of the soil conditioner have a synergistic effect, which not only improves the pH value of the soil and improves acidified soil, but also increases the organic matter content in the soil and regulates the enzyme activity in the soil, thereby improving the improvement effect of acidified soil, and further providing a better environment for the growth of crops, thereby improving the yield and quality of crops. DETAILED DESCRIPTION

[0019] The present invention provides a soil conditioner, which is made of the following raw materials in parts by weight: SiO 2 450~550 parts, Al 2 O 3 100-150 parts, Fe2 O 3 10-30 parts, FeO 9-25 parts and TiO 2 1 to 6 servings.

[0020] As an embodiment, the soil conditioner is made of the following raw materials in parts by weight: SiO 2 470~520 parts, Al 2 O 3 110-140 parts, Fe 2 O 3 15-25 parts, FeO 12-22 parts and TiO 2 2 to 5 servings.

[0021] The present invention also provides a method for preparing the soil conditioner, comprising the following steps:

[0022] The SiO 2 、Al 2 O 3 , Fe 2 O 3 , FeO and TiO 2 After mixing, a soil conditioner is obtained.

[0023] The present invention has no special limitation on the mixing method in the above preparation method, and conventional methods in the art can be used, such as stirring and mixing. 2 、Al 2 O 3 , Fe 2 O 3 , FeO and TiO 2 Before mixing, the SiO 2 、Al 2 O 3 , Fe 2 O 3 , FeO and TiO 2 Crushing and sieving, the mesh number of the sieving is preferably 750-850 mesh, more preferably 770-830 mesh, and more preferably 800 mesh. The present invention increases the contact area between the soil conditioner and the soil by crushing and sieving, thereby better improving the pH value, organic matter and sucrase activity of the soil. The preparation method of the present invention is simple and easy to operate, and is suitable for industrial production.

[0024] The present invention has found through research that the soil conditioner of the present invention not only improves the pH value of the soil and improves acidified soil, but also can increase the organic matter content in the soil and regulate the enzyme activity in the soil, thereby significantly improving the improvement effect of acidified soil.

[0025] Based on this, the present invention also provides an application of the above-mentioned soil conditioner or preparation method in improving acidified soil.

[0026] The present invention also provides an application of the soil conditioner or the preparation method in increasing soil organic matter.

[0027] The present invention also provides an application of the soil conditioner or the preparation method in regulating soil enzyme activity.

[0028] In the present invention, the regulation is to increase, and the soil enzyme is soil sucrase. The activity of soil sucrase is highly positively correlated with the content of organic carbon, total phosphorus and available nitrogen. The increase of soil sucrase activity is beneficial to improving soil fertility. The soil conditioner of the present invention increases the activity of soil sucrase, indicating that the soil conditioner is beneficial to improving soil fertility, thereby promoting plant growth and improving its quality.

[0029] In the present invention, unless otherwise specified, all raw material components are commercially available products well known to those skilled in the art.

[0030] The technical solutions provided by the present invention are described in detail below in conjunction with the embodiments, but they should not be construed as limiting the protection scope of the present invention.

[0031] Example 1

[0032] A soil conditioner, made from the following raw materials by weight:

[0033] SiO 2 500g, Al 2 O 3 120g, Fe 2 O 3 20g, FeO 17g and TiO 2 4g.

[0034] The above raw materials were weighed respectively, crushed, passed through an 800-mesh sieve, and mixed evenly to obtain a soil conditioner.

[0035] Example 2

[0036] A soil conditioner, made from the following raw materials by weight:

[0037] SiO 2 450gg、Al 2 O 3 100g, Fe 2 O 3 30g, FeO 25g and TiO 2 6g.

[0038] The above raw materials were weighed respectively, crushed, passed through a 750-mesh sieve, and mixed evenly to obtain a soil conditioner.

[0039] Example 3

[0040] A soil conditioner, made from the following raw materials by weight:

[0041] SiO 2 550g、Al 2 O 3 150g, Fe 2 O 3 10gg, FeO 9g and TiO 2 1g.

[0042] The above raw materials were weighed respectively, crushed, passed through an 850-mesh sieve, and mixed evenly to obtain a soil conditioner.

[0043] Example 4

[0044] Effect of the soil conditioner of Example 1 on soil pH

[0045] Soil pH determination method: The test soil is acidic soil and is located in Daguang Village, Hengshan County, Hengyang. The topsoil is collected and the initial pH value of the soil is tested with a pH meter. The soil is then divided into a control group and a test group (the soil conditioner of Example 1). The control group is conventionally applied with 30 kg of compound fertilizer per mu (9.5 kg / mu of urea during topdressing and 2.5 kg / mu of urea during heading, with an effective nutrient content of 15% for nitrogen, phosphorus and potassium). The test group is based on the conventional application of compound fertilizer equal to that of the control group, and then the soil conditioner of Example 1 is applied at 1 kg per mu. The pH of the soil of the control group and the test group after 5 months is tested with a pH meter. The results are shown in Table 1.

[0046] Table 1 Determination results of soil pH values ​​in different groups

[0047]

[0048]

[0049] The results in Table 1 show that after the soil organic matter treatment of the present invention, the acidic soil develops into alkaline soil, which can improve the acidity of the soil.

[0050] Method for determining soil organic matter or soil sucrase activity: The test soil is acidic soil and is located in Daguang Village, Hengshan County, Hengyang. Soil from the cultivated layer was collected to determine the initial soil organic matter. The soil was then divided into a control group and a test group (the soil conditioner of Example 1). The control group was routinely applied with 30 kg of compound fertilizer per mu (9.5 kg / mu of urea during topdressing and 2.5 kg / mu of urea during heading, with an effective nutrient content of nitrogen, phosphorus and potassium of 15%). The test group was applied with the same amount of conventional compound fertilizer as the control group, and then with 1 kg / mu of the soil conditioner of Example 1. The organic matter of the soil in the control group and the test group was determined 5 months later, and the sucrase activity of the soil in the control group and the test group was determined 5 months later.

[0051] Among them, the potassium dichromate external heating method was used to determine organic matter: 0.2 g of air-dried soil from the control group and the test group that had passed through a 0.149 mm sieve was weighed and placed in a 150 mL conical flask, and 0.10 g Ag was added. 2 SO 4 Then, add 5 mL of 0.8 mol·L -1 K 2 CrO 7 Solution and 5mL 1.84g / cm 3 H 2 SO 4 Shake well, install an air condenser at the bottle mouth, place it in a 220℃ electric sand bath for heating, start timing when condensate appears at the lower end of the condenser, and continue for 5 minutes. Remove the conical flask and cool it. Wash the condenser with distilled water and collect the washing liquid in the bottle. The total volume in the bottle is controlled at 60mL. Add 3 drops of o-phenanthroline reagent and 0.2mol / L FeSO 4 Titration residual K 2 CrO 7 , the solution turns red, and the consumed FeSO 4 Solution. Three blank experiments were performed at the same time, SiO 2 Replace soil sample.

[0052] Organic carbon (%) = 1.296 × V 1 (V 0 -V) / V 0 ;

[0053] Where: V 1 —Join K 2 CrO 7 Volume of solution, mL;

[0054] V 0 —FeSO consumed in blank calibration 4 Solution volume, mL;

[0055] V—Determination of FeSO consumption by soil sample4 Solution volume, mL.

[0056] Among them, organic carbon is also called organic matter.

[0057] Table 2 Determination results of soil organic matter in different groups

[0058]

[0059] The results in Table 2 show that the soil conditioner of the present invention increases the content of soil organic matter.

[0060] Among them, the determination of soil sucrase:

[0061] Test reagents: 8% sucrose, pH 5.5 phosphate buffer (11.867 g disodium hydrogen phosphate is dissolved in 1 L water (liquid A); 9.078 g potassium dihydrogen phosphate is weighed in 1 L water (liquid B); 0.5 mL of liquid A and 9.5 mL of liquid B are taken and mixed to obtain pH 5.5 phosphate buffer), 3,5-dinitrosalicylic acid reagent, glucose working solution (glucose is vacuum dried at 55°C, 0.5 g glucose is weighed and dissolved in 100 mL benzoic acid, which is the standard solution, and the standard solution is used to prepare a glucose working solution with a concentration of 0.01-0.5 mg / mL).

[0062] Determination method: weigh 5g of air-dried soil in a 50mL conical flask, add 5 drops of toluene, 15mL 8% sucrose and mL pH 5.5 phosphate buffer, shake at 180r / min, and place in a constant temperature incubator, incubate at 37℃ for 1d. Take out, filter, take 1mL of the filtrate in a new 10mL volumetric flask, add 3mL of dinitrosalicylic acid, heat in a water bath at nearly 100℃ for 5min, and then cool for 3min. If the solution is colored, make up the volume, and compare the color at 508nm using a spectrophotometer. Make a no-soil and no-matrix control. Draw a standard curve: take 1mL of a series of glucose working solutions, and determine it using the soil sample method. Use the glucose concentration as the horizontal axis of the curve, and the corresponding absorbance as the vertical axis. The enzyme activity is expressed as milligrams of glucose per gram of soil after 1d.

[0063] Table 3 Determination results of soil sucrase activity in different groups

[0064]

[0065] The results in Table 3 show that the soil conditioner of the present invention increases the activity of soil sucrase, thereby being beneficial to improving soil fertility.

[0066] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principle of the present invention. These improvements and modifications should also be regarded as the scope of protection of the present invention.

Claims

1. A soil conditioner, characterized in that: The invention is prepared from the following raw materials in parts by weight: 450-550 parts of SiO2, 100-150 parts of Al2O3, 10-30 parts of Fe2O3, 9-25 parts of FeO and 1-6 parts of TiO2.

2. The soil conditioner according to claim 1, characterized in that The soil conditioner is made of the following raw materials in parts by weight: 470-520 parts of SiO2, 110-140 parts of Al2O3, 15-25 parts of Fe2O3, 12-22 parts of FeO and 2-5 parts of TiO2.

3. The method for preparing the soil conditioner according to claim 1 or 2, characterized in that: The following steps are involved: The SiO2, Al2O3, Fe2O3, FeO and TiO2 are mixed to obtain a soil conditioner.

4. The preparation method according to claim 3, characterized in that: Before the mixing, the method further includes the steps of crushing and sieving the SiO2, Al2O3, Fe2O3, FeO and TiO2.

5. The preparation method according to claim 4, characterized in that: The mesh number of the sieving is 750 to 850 meshes.

6. Use of the soil conditioner according to claim 1 or 2 or the preparation method according to any one of claims 3 to 5 in improving acidified soil.

7. Use of the soil conditioner according to claim 1 or 2 or the preparation method according to any one of claims 3 to 5 in increasing soil organic matter.

8. Use of the soil conditioner according to claim 1 or 2 or the preparation method according to any one of claims 3 to 5 in regulating soil enzyme activity.

9. The use according to claim 8, characterized in that: The regulation is increasing, and the soil enzyme is soil sucrase.

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