Preparation method of anti-erosion improver for reducing fertility loss of surface soil

Abstract

The invention discloses a method for preparing an anti-erosion improver for reducing the loss of fertility in the surface soil, wherein the modified cellulose-biochar is firstly configured into a rod-shaped configuration, and then the rod-shaped modified cellulose-biochar is soaked in a modified cellulose solution, and then one end of the rod-shaped modified cellulose-biochar is sprayed with a microbial agent solution, and the other end is soaked in a modified cellulose glue solution, and the two ends of the rod-shaped modified cellulose-biochar are alternately sprayed with the microbial agent solution and soaked in the modified cellulose glue solution for several times to obtain the anti-erosion improver. The anti-erosion improver of the invention can maximize the corresponding effect of biochar on soil remediation, increase the survival amount of microbial agents in the soil, increase soil nutrients, and reduce the problem of loss of fertility in the surface soil.

Description

Technical Field

[0001] The invention relates to the technical field of soil remediation, and in particular to a method for preparing an anti-erosion improver for reducing fertility loss of surface soil. Background Art

[0002] Excessive use of chemical fertilizers can lead to soil salinization and acidification, destroy soil structure, and reduce soil fertility, making it difficult for vegetation to grow in the area. Under the erosion of water and wind, soil and nutrients will be carried away by water flow and fine soil particles will be blown away.

[0003] In order to reduce the loss of fertility in the surface soil, organic fertilizers are usually used to improve soil structure and provide nutrients. However, frequent application of organic fertilizers will cause the organic matter in the organic fertilizers to decompose and produce soluble organic matter and microbial metabolites. These substances accumulate in the soil and may destroy the soil aggregate structure in the long run, causing the soil and nutrients to be taken away by wind erosion. At the same time, the nutrient content in organic fertilizers is complex. If used for a long time, it may cause some nutrients to be excessive, resulting in soil nutrient imbalance. Therefore, a new type of soil conditioner is needed to optimize the soil and reduce the problem of fertility loss in the surface soil. Summary of the invention

[0004] In order to solve the above technical problems, the present invention provides a method for preparing an anti-erosion improver for reducing the loss of fertility in the surface soil.

[0005] The technical solution of the present invention is: a method for preparing an anti-erosion improver for reducing the loss of fertility in the surface soil, firstly, the modified cellulose-biochar is configured into a rod shape, then the rod-shaped modified cellulose-biochar is soaked in a modified cellulose solution, then one end of the modified cellulose-biochar is sprayed with a microbial agent solution, and the other end is soaked in a modified cellulose glue solution, and the two ends of the modified cellulose-biochar are alternately sprayed with the microbial agent solution and soaked in the modified cellulose glue solution for several times to obtain the anti-erosion improver.

[0006] Furthermore, the preparation method of the anti-corrosion modifier specifically comprises the following steps:

[0007] Step 1, firstly shape the modified cellulose-biochar into a rod-shaped configuration, then soak the rod-shaped modified cellulose-biochar in the modified cellulose solution for 10 to 15 minutes, then dry at room temperature until the moisture content is less than 10%, and then fix the middle part of the rod-shaped modified cellulose-biochar on the fixing hole of a special perforated template;

[0008] Step 2, simultaneously, one end of the rod-shaped modified cellulose-biochar is treated with the modified cellulose glue solution, and the other end is treated with the microbial agent solution spraying; wherein, the modified cellulose glue solution soaking time is 60 to 90 seconds, the microbial agent solution spraying is spraying 40 to 50 mL / min of the microbial agent solution and drying at room temperature, and the ratio of the room temperature drying time to the microbial agent solution spraying time is 1:1;

[0009] Step 3, after the modified cellulose glue infiltration in step 2 is completed, the rod-shaped modified cellulose-biochar is turned over, that is, the special perforated template is turned over 180 degrees, and at the same time, one end of the rod-shaped modified cellulose-biochar is sprayed with the microbial agent liquid, and the other end is infiltrated with the modified cellulose glue;

[0010] Step 4: Repeat the treatment of infiltrating the modified cellulose glue solution and spraying the microbial agent solution in steps 2 and 3, so that the rod-shaped modified cellulose-biochar is turned over 3 to 5 times to obtain an anti-corrosion improver.

[0011] Description: The present invention forms a rod-shaped modified cellulose-biochar, and alternately sprays the two ends of the rod-shaped modified cellulose-biochar with a microbial agent liquid and soaks the two ends with a modified cellulose glue liquid. The two ends of the rod-shaped modified cellulose-biochar have modified cellulose at one end in the same structural layer, and have a microbial agent at the other end, so as to achieve the effect of releasing the modified cellulose and the microbial agent at the same time. In addition, this can significantly improve the preparation efficiency of the anti-erosion improver, save production costs, and improve the efficiency of quantitative production. At the same time, through such a structural design of the anti-erosion improver, the slow-release effect can be improved, and the long-term durability of the anti-erosion improver in reducing the loss of fertility in the surface soil can be improved. In addition, the low-speed air drying method should be adopted for room temperature drying, and the wind speed should be controlled at about 1m / s. The wind speed should not be too large, otherwise it will affect the effect of spraying the microbial agent liquid.

[0012] Furthermore, the modified cellulose liquid is a mixed liquid formed by mixing sodium carboxymethyl cellulose and water in a volume ratio of 2 to 7:50; the modified cellulose glue liquid is a mixed liquid formed by mixing sodium carboxymethyl cellulose and water in a volume ratio of 20 to 30:50; the microbial agent liquid is a mixed liquid formed by mixing mixed bacterial powder and water in a mass ratio of 5 to 10:30, and the mixed bacterial powder is a mixture of Bacillus subtilis, Bacillus licheniformis, phosphate-solubilizing bacteria, and photosynthetic bacteria in a mass ratio of 2 to 3:1 to 4:0.5 to 1:1 to 2, and the effective viable count of the mixed bacterial powder is ≥4.5×10 8 CFU / g.

[0013] Description: By using sodium carboxymethyl cellulose, modified cellulose can be used to absorb soil moisture while producing a certain adsorption effect on nutrient ions in the soil. In addition, it can cooperate with biochar to improve soil aeration and promote the growth and reproduction of microorganisms, beneficial bacteria and fungi, thus playing an important role in the formation of soil texture and the circulation of nutrients, and promoting the healthy development of the soil ecosystem.

[0014] At the same time, biochar can improve soil water retention, reduce water loss, increase soil water storage, and biochar combines with soil particles to form a tiny aggregate structure, which enhances the adhesion of water in the soil and reduces soil water evaporation, thereby improving soil water holding capacity; biochar can also adsorb and store large amounts of organic matter and nutrients, thereby providing a lasting source of nutrition for plant growth in the soil; and biochar can stabilize organic matter and nutrients, reduce their loss and conversion rates, and increase soil fertility, thereby reducing the loss of surface soil fertility.

[0015] Furthermore, the temperature of the modified cellulose glue is controlled at 30°C±3°C.

[0016] Note: By controlling the modified cellulose glue at a temperature slightly higher than room temperature, the short temperature difference between the room temperature of 25°C of the rod-shaped modified cellulose-biochar and the rod-shaped modified cellulose-biochar can be utilized to promote the infiltration effect of the modified cellulose glue at this temperature on the rod-shaped modified cellulose-biochar, thereby making the anti-corrosion improver have a better use effect.

[0017] Furthermore, the preparation method of the modified cellulose-biochar is as follows: the biochar is soaked in an acidic solution, then washed to neutrality and dried, and then the biochar and the modified cellulose are mixed in a mass ratio of 10:1 to 2 to obtain the modified cellulose-biochar;

[0018] The method for shaping the modified cellulose-biochar into a rod-shaped configuration is: pressing the modified cellulose-biochar to obtain the rod-shaped modified cellulose-biochar.

[0019] Note: Pre-immersion of biochar in an acidic solution can effectively remove inorganic impurities and ash, such as metal oxides, sulfides, etc., thereby improving the purity and adsorption capacity of biochar, and can remove impurities on the surface and pores of biochar, increase its specific surface area and porosity, which enables biochar to better combine with modified cellulose.

[0020] Furthermore, the acidic solution is 1 mol / L hydrochloric acid, and the soaking time is 3 to 5 hours.

[0021] Note: Using hydrochloric acid at this concentration to dissolve inorganic salts and heavy metal compounds in biochar can effectively reduce the heavy metal content and effectively remove the floating ash on the surface of biochar and the ash in the pores, thereby providing basic conditions for subsequent compounding with modified cellulose.

[0022] Furthermore, before the rod-shaped modified cellulose-biochar is soaked in the modified cellulose solution, the rod-shaped modified cellulose-biochar is pretreated. Specifically, the rod-shaped modified cellulose-biochar is heated to 240-250° C. for carbonization treatment to obtain the carbonized rod-shaped modified cellulose-biochar.

[0023] Description: Carbonization of rod-shaped modified cellulose-biochar can enhance the bonding effect between modified cellulose and biochar matrix, thereby optimizing the use effect of rod-shaped modified cellulose-biochar in soil remediation, improving the surface roughness of rod-shaped modified cellulose-biochar, and thus improving the effect of subsequent microbial agent liquid spraying and modified cellulose glue liquid infiltration.

[0024] Furthermore, after the carbonization treatment is completed, the modified cellulose liquid is used to spray and cool the rod-shaped modified cellulose-biochar, and the spraying amount is 20-40 mL / s until the rod-shaped modified cellulose-biochar is cooled to room temperature.

[0025] Description: The modified cellulose liquid can be used for post-treatment of the rod-shaped modified cellulose-biochar after carbonization treatment through spray cooling treatment. When the rod-shaped modified cellulose-biochar is cooled rapidly, a temperature gradient inside it will form rapidly, which will help to fix the microstructure of the rod-shaped modified cellulose-biochar and reduce structural damage during the cooling process. Compared with slow cooling, the spray cooling can reduce the thermal stress of the internal structure of the biochar caused by long-term high temperature, thereby improving the structural stability, and helping to maintain the porosity of the rod-shaped modified cellulose-biochar and maintain excellent performance. At the same time, a small amount of modified cellulose can be attached to the surface of the rod-shaped modified cellulose-biochar to improve the use effect of the rod-shaped modified cellulose-biochar.

[0026] Furthermore, the application amount of the anti-erosion modifier is 100-300 kg per ton of soil to be treated.

[0027] Note: The application dosage of the above-mentioned anti-erosion modifier can effectively treat the soil to be repaired, thereby reducing the loss of fertility in the surface soil, improving soil fertility, and maintaining soil moisture and aeration.

[0028] The beneficial effects of the present invention are:

[0029] (1) The anti-erosion improver of the present invention utilizes the combination of modified cellulose and biochar to significantly alleviate the situation of soil compaction and excessive compaction when only modified cellulose is applied, and can maximize the corresponding effect of biochar on soil remediation, increase the survival rate of microbial agents in the soil, increase soil nutrients, and reduce the problem of loss of surface soil fertility.

[0030] (2) The anti-erosion improver of the present invention uses rod-shaped modified cellulose-biochar as a matrix, and the two ends of the rod-shaped modified cellulose-biochar are alternately sprayed with a microbial agent liquid and soaked with a modified cellulose glue liquid, which can achieve the effect of simultaneously releasing the modified cellulose and the microbial agent, and significantly improve the preparation efficiency of the anti-erosion improver, save production costs, and improve the efficiency of quantitative production.

[0031] (3) The anti-erosion modifier of the present invention adopts a special structural design, which can enhance the slow-release effect while increasing the contact area with the soil through the structural morphology of the anti-erosion modifier. Compared with spherical particles and other configurations, the rod-shaped configuration enhances the binding effect with soil particles and reduces the problem of loose soil being susceptible to wind erosion. DETAILED DESCRIPTION

[0032] The present invention is further described in detail below in conjunction with specific implementation methods to better reflect the advantages of the present invention.

[0033] Embodiment 1: A method for preparing an anti-erosion improver for reducing the loss of fertility in the surface soil, firstly forming modified cellulose-biochar into a rod-shaped configuration, then soaking the rod-shaped modified cellulose-biochar in a modified cellulose solution, then spraying a microbial agent solution on one end of the rod-shaped modified cellulose-biochar, and soaking the other end in a modified cellulose glue solution, repeating the spraying of the microbial agent solution and soaking in the modified cellulose glue solution on both ends of the rod-shaped modified cellulose-biochar four times alternately, to obtain an anti-erosion improver;

[0034] The preparation method of the rod-shaped modified cellulose-biochar is as follows: the biochar is placed in an acidic solution for 4 hours, the acidic solution is 1 mol / L hydrochloric acid, then washed with deionized water until neutral and dried, and then the biochar and modified cellulose are mixed in a mass ratio of 20:3 to obtain modified cellulose-biochar; and the modified cellulose-biochar is configured into a rod shape, specifically, the modified cellulose-biochar is pressed to obtain the rod-shaped modified cellulose-biochar;

[0035] Before soaking the rod-shaped modified cellulose-biochar in the modified cellulose solution, the rod-shaped modified cellulose-biochar is pretreated, wherein the pretreatment is as follows: the rod-shaped modified cellulose-biochar is heated to 247°C for carbonization treatment to obtain the carbonized rod-shaped modified cellulose-biochar; the modified cellulose glue solution is a mixed solution formed by mixing sodium carboxymethyl cellulose and water in a volume ratio of 13:25; the microbial agent solution is a mixed solution formed by mixing mixed bacterial powder and water in a mass ratio of 4:15, wherein the mixed bacterial powder is a mixture of Bacillus subtilis, Bacillus licheniformis, phosphate-solubilizing bacteria, and photosynthetic bacteria in a mass ratio of 26:30:8:17, and the effective viable count of the mixed bacterial powder is ≥4.5×10 8 CFU / g.

[0036] The preparation method of the above-mentioned anti-corrosion modifier specifically comprises the following steps:

[0037] Step 1, firstly forming the modified cellulose-biochar into a rod-shaped configuration, then soaking the rod-shaped modified cellulose-biochar in a modified cellulose solution for 12 minutes, then drying at room temperature until the moisture content is 8%, and then fixing the middle of the rod-shaped modified cellulose-biochar on a fixing hole of a special perforated template; wherein the modified cellulose solution is a mixed solution of sodium carboxymethyl cellulose and water in a volume ratio of 1:10;

[0038] It can be understood that the special perforated template is a plate made of a corrosion-resistant material (such as ceramic) with a plurality of fixing holes, which is used to fix the middle of the rod-shaped modified cellulose-biochar by using the fixing holes to facilitate the processing of the two ends of the rod-shaped modified cellulose-biochar;

[0039] Step 2, simultaneously, one end of the rod-shaped modified cellulose-biochar is treated with the modified cellulose glue solution, and the other end is treated with the microbial agent solution spraying; wherein, the modified cellulose glue solution soaking time is 80 seconds, the microbial agent solution spraying is spraying 45mL / min of the microbial agent solution and drying at room temperature, and the room temperature drying time and the microbial agent solution spraying time are 1:1, that is, the microbial agent solution spraying time is 40 seconds, and the room temperature drying time is 40 seconds;

[0040] Step 3, after the modified cellulose glue infiltration in step 2 is completed, the rod-shaped modified cellulose-biochar is turned over, that is, the special perforated template is turned over 180 degrees, and at the same time, one end of the rod-shaped modified cellulose-biochar is sprayed with the microbial agent liquid, and the other end is infiltrated with the modified cellulose glue;

[0041] Step 4: Repeat the treatment of infiltrating the modified cellulose glue solution and spraying the microbial agent solution in steps 2 and 3, so that the rod-shaped modified cellulose-biochar is turned over 4 times to obtain an anti-corrosion improver.

[0042] The soil of a certain plot in this city is now treated, and the surface 50cm of the soil to be treated is taken as the treatment object. The soil nutrient content of the treated soil is measured, and the results are as follows Table 1:

[0043] Table 1 Nutrient content of soil to be treated in a plot of land in this city

[0044] project <![CDATA[Nitrate nitrogen (NO3 - -N)]]> Available P Available K Content (mg / kg) 22.64 14.47 121.87

[0045] The anti-erosion modifier of Example 1 is now used to treat the soil to be treated in the plot. Specifically, the application amount of the anti-erosion modifier is 220 kg per ton of soil to be treated. The anti-erosion modifier is evenly sprinkled and the soil to be treated is stirred, and 1 L of water is sprinkled per square meter of the surface of the soil to be treated. The nutrient content of the treated soil is measured for 30 days, and the results are shown in Table 2 below:

[0046] Table 2 Soil nutrient content after treatment in a plot of land in this city

[0047] project <![CDATA[Nitrate nitrogen (NO3 - -N)]]> Available P Available K Content (mg / kg) 39.52 22.34 174.21

[0048] From the results in Table 2 above, it can be seen that after 30 days of restoration treatment with anti-erosion modifiers, the nutrient content of the soil is significantly improved, among which the content of nitrate nitrogen in the soil is increased by 74.6% compared with that of untreated soil, the content of available phosphorus in the soil is increased by 54.4% compared with that of untreated soil, and the content of available potassium in the soil is increased by 42.9% compared with that of untreated soil. It can be seen that the use of anti-erosion modifiers can effectively improve the problem of soil surface fertility, and after 30 days of treatment with anti-erosion modifiers, the soil of the plot has been significantly improved, the water content has increased, the water retention rate has been improved, and the anti-erosion ability has been significantly improved.

[0049] At the same time, in order to further verify the effect of the anti-erosion modifier, a control is set up. Specifically, the same amount of sodium carboxymethyl cellulose, biochar and mixed bacterial powder as the anti-erosion modifier are directly added and stirred to the soil to be treated, and 1L of water is sprinkled on the surface of the soil to be treated per square meter. The nutrient content of the treated soil is measured for 30 days. The results are shown in Table 3 below:

[0050] Table 3 Soil nutrient content after treatment in a plot of land in this city

[0051]

[0052]

[0053] It can be seen from the results in Table 3 above that the nutrient content of the soil was significantly improved after 30 days of restoration treatment with the anti-erosion modifier, among which the content of nitrate nitrogen in the soil increased by 40.8% compared with that of the untreated soil, the content of available phosphorus in the soil increased by 28.7% compared with that of the untreated soil, and the content of available potassium in the soil increased by 20.9% compared with that of the untreated soil. By comparing with the results in Table 2, the nutrient content of each soil decreased to a certain extent by directly adding the same amount of sodium carboxymethyl cellulose, biochar and mixed bacterial powder. Therefore, the use of anti-erosion modifiers can better reduce the loss of soil fertility in the soil surface layer, and have a significant effect on fertilizing and consolidating the soil.

[0054] Example 2: This example is different from Example 1 in that the preparation method of the rod-shaped modified cellulose-biochar is as follows: the biochar is immersed in an acidic solution for 3 hours, the acidic solution is 1 mol / L hydrochloric acid, and then washed with deionized water until neutral and dried, and then the biochar and modified cellulose are mixed in a mass ratio of 10:1 to obtain modified cellulose-biochar; the modified cellulose-biochar is then formed into a rod-shaped configuration, specifically, the modified cellulose-biochar is pressed to obtain a rod-shaped modified cellulose-biochar; and before the rod-shaped modified cellulose-biochar is soaked in the modified cellulose solution, the rod-shaped modified cellulose-biochar is pretreated, and the pretreatment is as follows: the rod-shaped modified cellulose-biochar is heated to 240°C for carbonization treatment to obtain the carbonized rod-shaped modified cellulose-biochar.

[0055] Example 3: This example is different from Example 1 in that the preparation method of the rod-shaped modified cellulose-biochar is as follows: the biochar is immersed in an acidic solution for 5 hours, the acidic solution is 1 mol / L hydrochloric acid, and then washed with deionized water until neutral and dried, and then the biochar and modified cellulose are mixed in a mass ratio of 5:1 to obtain modified cellulose-biochar; the modified cellulose-biochar is then formed into a rod-shaped configuration, specifically, the modified cellulose-biochar is pressed to obtain a rod-shaped modified cellulose-biochar; and before the rod-shaped modified cellulose-biochar is soaked in the modified cellulose solution, the rod-shaped modified cellulose-biochar is pretreated, and the pretreatment is as follows: the rod-shaped modified cellulose-biochar is heated to 250°C for carbonization treatment to obtain the carbonized rod-shaped modified cellulose-biochar.

[0056] Example 4: This example is different from Example 1 in that the modified cellulose glue is a mixture of sodium carboxymethyl cellulose and water in a volume ratio of 2:5; the microbial agent liquid is a mixture of mixed bacterial powder and water in a mass ratio of 1:6; and the modified cellulose liquid is a mixture of sodium carboxymethyl cellulose and water in a volume ratio of 1:25.

[0057] Example 5: This example is different from Example 1 in that the modified cellulose glue is a mixture of sodium carboxymethyl cellulose and water in a volume ratio of 3:5; the microbial agent liquid is a mixture of mixed bacterial powder and water in a mass ratio of 1:3; and the modified cellulose liquid is a mixture of sodium carboxymethyl cellulose and water in a volume ratio of 7:50.

[0058] Example 6: This example is different from Example 1 in that the mixed bacterial powder is a mixture of Bacillus subtilis, Bacillus licheniformis, phosphate-solubilizing bacteria, and photosynthetic bacteria in a mass ratio of 4:2:1:2.

[0059] Example 7: This example is different from Example 1 in that the mixed bacterial powder is a mixture of Bacillus subtilis, Bacillus licheniformis, phosphate-solubilizing bacteria, and photosynthetic bacteria in a mass ratio of 3:4:1:2.

[0060] Example 8: This example is different from Example 1 in that the rod-shaped modified cellulose-biochar is soaked in the modified cellulose solution for 10 minutes.

[0061] Example 9: This example is different from Example 1 in that the rod-shaped modified cellulose-biochar is soaked in the modified cellulose solution for 15 minutes.

[0062] Example 10: The difference between this example and Example 1 is that the time of infiltrating the modified cellulose glue is 60 seconds, and the spraying of the microbial agent liquid is 40 mL / min of the microbial agent liquid and drying at room temperature, that is, the spraying time of the microbial agent liquid is 30 seconds, and the drying time at room temperature is 30 seconds.

[0063] Example 11: This example is different from Example 1 in that the time of impregnation with modified cellulose glue is 90 seconds, the spraying of microbial agent liquid is 50 mL / min of microbial agent liquid and drying at room temperature, the spraying time of microbial agent liquid is 45 seconds, and the drying time at room temperature is 45 seconds.

[0064] Example 12: This example is different from Example 1 in that the template is flipped three times to obtain the anti-corrosion improver.

[0065] Example 13: This example is different from Example 1 in that the template is flipped 5 times to obtain the anti-corrosion improver.

[0066] In order to study the influence of various parameters of the preparation method of the anti-erosion modifier on the anti-erosion modifier, the same treatment method as in Example 1 was used to measure the nutrient content of the treated soil for 30 days. The results are shown in Table 4 below:

[0067] Table 4 Soil nutrient content after treatment in a plot of land in this city

[0068]

[0069]

[0070] From the results in Table 4 above, it can be seen that after 30 days of restoration treatment with the anti-erosion modifiers of each embodiment, the nutrient content of the soil is significantly improved, but there are certain differences in the nutrient content. By comparing Example 2, Example 3 with Example 1, it can be seen that different acid solution immersion times and carbonization treatment temperatures have a certain impact on the use effect. Among them, the use effect of Example 3 is not much different from that of Example 1, but Example 3 uses a longer process treatment time. From the perspective of economy, Example 1 is relatively optimal; by comparing Example 4, Example 5 with Example 1, it can be seen that when using different modified Cellulose glue, microbial agent liquid, and modified cellulose liquid have certain effects on the use effect. Changing the consistency of modified cellulose and increasing or decreasing the concentration of microbial agent all cause the use effect of the anti-erosion modifier to decline to a certain extent, among which Example 1 is relatively optimal. By comparing Example 6 and Example 7 with Example 1, it can be seen that the use of microbial agent liquids with different ratios has a certain influence on the use effect. After changing the ratio of Bacillus subtilis, Bacillus licheniformis, phosphate-solubilizing bacteria, and photosynthetic bacteria, the use effect of the anti-erosion modifier declines to a certain extent, among which Example 1 is relatively optimal. By comparing Example 8 and Example 9, it can be seen that the use effect of the anti-erosion modifier declines to a certain extent, among which Example 1 is relatively optimal. From the comparison between Example 9 and Example 1, it can be seen that the infiltration time of different modified cellulose solutions has a certain influence on the use effect. After reducing or extending the infiltration time, the use effect of the anti-erosion modifier has decreased to a certain extent, among which Example 1 is relatively optimal; from the comparison between Example 10 and Example 1, it can be seen that the infiltration of different modified cellulose glue solutions, spraying of microbial agent solutions and drying at room temperature have a certain influence on the use effect. After reducing these parameter conditions, the use effect of the anti-erosion modifier has decreased to a certain extent, and after increasing these parameter conditions, the use effect of the anti-erosion modifier has increased. Therefore, from the perspective of economy, Example 1 is relatively optimal; from the comparison of Example 12 and Example 13 with Example 1, it can be seen that the anti-corrosion modifiers prepared with different template flipping times have a certain influence on the use effect. After reducing the number of template flipping times, that is, the number of infiltration and spraying of the anti-corrosion modifier is reduced, its use effect is reduced to a certain extent, and after increasing the number of template flipping times, its use effect is not significantly improved. This may be due to the influence of the sustained release effect, and the full effect of the anti-corrosion modifier cannot be exerted for 30 days.

[0071] Example 14: This example is different from Example 1 in that the temperature of the modified cellulose glue is controlled at 30°C.

[0072] Example 15: This example is different from Example 14 in that the temperature of the modified cellulose glue is controlled at 27°C.

[0073] Example 16: This example is different from Example 14 in that the temperature of the modified cellulose glue is controlled at 33°C.

[0074] On the basis of Example 1, we set the temperature of the modified cellulose glue solution, and through the short temperature difference between the rod-shaped modified cellulose-biochar and the room temperature of 25°C, the effect of the infiltration of the modified cellulose glue solution at this temperature of the rod-shaped modified cellulose-biochar was promoted. The same treatment method as in Example 1 was used to measure the nutrient content of the treated soil for 30 days. The results are shown in Table 5 below:

[0075] Table 5 Soil nutrient content after treatment in a plot of land in this city

[0076] project <![CDATA[Nitrate nitrogen (NO3 - -N)]]> Available P Available K Embodiment 14 41.85 23.27 175.86 Embodiment 15 41.03 23.11 175.29 Example 16 41.24 23.12 175.47

[0077] It can be seen from the results in Table 5 above that the effect of the anti-corrosion modifier is improved to a certain extent by subjecting the modified cellulose glue to a short-range temperature difference treatment between the temperature of the modified cellulose-biochar in the form of a rod at a room temperature of 25°C. At the same time, by comparing Example 15 and Example 16 with Example 14, it can be seen that the effect of the anti-corrosion modifier decreases to a certain extent when increasing or decreasing the short-range temperature difference treatment, among which the preparation effect of Example 14 is the best.

[0078] Example 17: This example is different from Example 1 in that after the carbonization treatment is completed, the modified cellulose liquid is used to spray and cool the rod-shaped modified cellulose-biochar, and the spraying rate is 30 mL / s until the rod-shaped modified cellulose-biochar is cooled to room temperature; it can be understood that the modified cellulose liquid is at room temperature 25°C.

[0079] Example 18: This example is different from Example 17 in that after the carbonization treatment, the modified cellulose liquid is used to spray and cool the rod-shaped modified cellulose-biochar, and the spraying rate is 20 mL / s until the rod-shaped modified cellulose-biochar is cooled to room temperature.

[0080] Example 19: This example is different from Example 17 in that after the carbonization treatment, the modified cellulose liquid is used to spray and cool the rod-shaped modified cellulose-biochar, and the spraying rate is 40 mL / s until the rod-shaped modified cellulose-biochar is cooled to room temperature.

[0081] On the basis of Example 1, we optimized the carbonization treatment of the rod-shaped modified cellulose-biochar. The spray cooling treatment was helpful to fix the microstructure of the rod-shaped modified cellulose-biochar. The same treatment method as Example 1 was used to measure the nutrient content of the treated soil for 30 days. The results are shown in Table 6 below:

[0082] Table 6 Soil nutrient content after treatment in a plot of land in this city

[0083] project <![CDATA[Nitrate nitrogen (NO3 - -N)]]> Available P Available K Embodiment 17 42.74 23.89 177.43 Embodiment 18 42.10 23.14 176.89 Embodiment 19 42.81 23.93 177.56

[0084] At the same time, a control was set up, where the modified cellulose liquid was replaced with water at room temperature of 25°C, and the other preparation conditions remained unchanged. The obtained anti-erosion modifier was treated in the same manner as in Example 1, and the nutrient content of the treated soil was measured for 30 days. The results are shown in Table 7 below:

[0085] Table 7 Soil nutrient content after treatment in a plot of land in this city

[0086] project <![CDATA[Nitrate nitrogen (NO3 - -N)]]> Available P Available K Content (mg / kg) 40.71 22.89 175.68

[0087] It can be seen from the results in Table 7 above that after cooling treatment with water, compared with Example 1, nitrate nitrogen, available phosphorus and available potassium are improved to a certain extent, but the improvement is larger than that of Example 17 to Example 19. It can be seen that the use effect of the anti-corrosion modifier can be improved to a certain extent when using modified cellulose liquid as a cooling liquid for spray cooling.

Claims

1. A method for preparing an anti-erosion modifier for reducing the loss of fertility in the surface soil, characterized in that: First, the modified cellulose-biochar is configured into a rod-shaped configuration, and then the rod-shaped modified cellulose-biochar is soaked in a modified cellulose solution, and then one end of the rod-shaped modified cellulose-biochar is sprayed with a microbial agent solution, and the other end is soaked in a modified cellulose glue solution, and the two ends of the rod-shaped modified cellulose-biochar are alternately sprayed with the microbial agent solution and soaked in the modified cellulose glue solution for several times to obtain an anti-corrosion improver; The preparation method of the modified cellulose-biochar is as follows: the biochar is immersed in an acidic solution, wherein the acidic solution is 1 mol / L hydrochloric acid, and the immersion time is 3 to 5 hours, and then the biochar is washed to neutrality and dried, and then the biochar and the modified cellulose are mixed in a mass ratio of 10:1 to 2 to obtain the modified cellulose-biochar; the method of forming the modified cellulose-biochar into a rod-shaped configuration is as follows: the modified cellulose-biochar is pressed to obtain the rod-shaped modified cellulose-biochar; The modified cellulose liquid is a mixed liquid formed by mixing sodium carboxymethyl cellulose and water in a volume ratio of 2-7:50; the modified cellulose glue liquid is a mixed liquid formed by mixing sodium carboxymethyl cellulose and water in a volume ratio of 20-30:50; the microbial agent liquid is a mixed liquid formed by mixing mixed bacterial powder and water in a mass ratio of 5-10:30, wherein the mixed bacterial powder is a mixture of Bacillus subtilis, Bacillus licheniformis, phosphate-solubilizing bacteria, and photosynthetic bacteria in a mass ratio of 2-3:1-4:0.5-1:1-2, and the effective viable bacteria count of the mixed bacterial powder is ≥4.5×10 8 CFU / g.

2. The method for preparing an anti-erosion improver for reducing fertility loss of surface soil according to claim 1, characterized in that: The preparation method of the anti-corrosion modifier specifically comprises the following steps: Step 1, firstly forming the modified cellulose-biochar into a rod-shaped configuration, then soaking the rod-shaped modified cellulose-biochar in a modified cellulose solution for 10-15 minutes, and then drying at room temperature until the moisture content is less than 10%; Step 2, simultaneously, one end of the rod-shaped modified cellulose-biochar is treated with the modified cellulose glue solution, and the other end is treated with the microbial agent solution spraying; wherein, the modified cellulose glue solution soaking time is 60-90s, the microbial agent solution spraying is spraying 40-50mL / min of the microbial agent solution and drying at room temperature, and the room temperature drying time and the microbial agent solution spraying time are 1:1; Step 3, after the modified cellulose glue infiltration in step 2 is completed, the rod-shaped modified cellulose-biochar is turned over, and at the same time, one end of the rod-shaped modified cellulose-biochar is sprayed with a microbial agent liquid, and the other end is infiltrated with the modified cellulose glue; Step 4: Repeat the treatment of infiltrating the modified cellulose glue solution and spraying the microbial agent solution in steps 2 and 3, so that the rod-shaped modified cellulose-biochar is turned over 3 to 5 times to obtain an anti-corrosion improver.

3. The method for preparing an anti-erosion improver for reducing fertility loss of surface soil according to claim 2, characterized in that: The infiltration time of the modified cellulose glue is 60-90 seconds, and the temperature of the modified cellulose glue is controlled at 30°C±3°C.

4. The method for preparing an anti-erosion improver for reducing fertility loss of surface soil according to claim 1, characterized in that: Before the rod-shaped modified cellulose-biochar is soaked in the modified cellulose solution, the rod-shaped modified cellulose-biochar is pretreated. Specifically, the rod-shaped modified cellulose-biochar is heated to 240-250° C. for carbonization treatment to obtain the carbonized rod-shaped modified cellulose-biochar.

5. The method for preparing an anti-erosion improver for reducing fertility loss of surface soil according to claim 4, characterized in that: After the carbonization treatment is completed, the modified cellulose liquid is used to spray the rod-shaped modified cellulose-biochar to cool it down, and the spraying amount is 20-40 mL / s until the rod-shaped modified cellulose-biochar is cooled to room temperature.

Images