A method for improving the carbon sequestration capacity of forests by processing forestry waste

Abstract

The application discloses a kind of forestry waste treatment methods for improving forest carbon sequestration capacity, belong to forestry waste processing technical field, the method is to carry out composting after forestry waste is returned to forest, specifically including material crushing, carbon-nitrogen ratio adjustment, moisture content and pH adjustment, heap preparation and maturity and the like step, by preparing enzyme activity control agent and mixing into material slag to compost, the high concentration glucose produced in high temperature stage decomposition is absorbed by the prepared enzyme activity control agent, to reduce the inhibitory effect of high concentration glucose on cellulase, while the control agent further improves cellulase activity, further control to water, pH and the like condition, guarantee composting efficiently, improve composting rate and degree of maturity, the fertilizer obtained by composting can effectively improve the physicochemical properties of soil in forest, promote the growth of forest trees, improve stand quality and carbon sequestration capacity, the forestry waste treatment method of the application has important significance to the resource utilization of forestry waste and forest carbon sequestration and sink.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of forestry waste treatment, and particularly relates to a forestry waste treatment method for improving forest carbon sequestration capacity. BACKGROUND

[0002] With the continuous expansion of forestry production scale, the amount of forestry waste is increasing year by year, and the traditional landfill and incineration treatment methods not only cause great waste of resources, but also cause serious environmental pollution. At the same time, forestry waste has the characteristics of large quantity, multiple types and wide distribution. Therefore, effective utilization of forestry waste resources and maximization of their value are of great significance for energy saving, carbon emission reduction, environmental protection and production promotion.

[0003] The composting treatment technology is a process of decomposing and fermenting forestry waste by microorganisms such as fungi, bacteria and actinomycetes after crushing, and finally forming stable humus. Composting is a forestry waste treatment technology with high resource utilization rate. Returning forestry waste compost products to forest can reduce the use of chemical fertilizers, improve the soil carbon sequestration capacity in forest, and improve the soil physical and chemical properties to promote the growth of forest trees, increase the biomass and carbon storage of forest trees, and thus improve the carbon sequestration capacity of forest stand. Therefore, composting of forestry waste and returning to forest is an important measure to increase the carbon sink capacity of forest.

[0004] Due to the large quantity and high weight of forestry waste, transporting it out of the forest to a specific site for composting and then transporting it back to the forest for application will greatly increase the transportation and operation costs. Therefore, in-situ composting in the forest and direct application in the forest after composting are more reasonable forestry waste composting methods. However, the turning and other management operations are more complicated when directly composting in-situ in the forest. In addition, compared with other composting raw materials, forestry waste contains more cellulose and hemicellulose and other difficult-to-decompose organic matter, and natural decomposition is extremely slow. Under conventional methods, the natural composting decomposition rate is relatively long, and if not properly treated, the composting is not completely decomposed, and stable humus is not formed, which will have adverse effects in the application process.

[0005] Therefore, it is an urgent problem to find an in-situ composting method suitable for forestry waste that can reduce management costs while improving the composting rate and degree of decomposition of forestry waste. SUMMARY

[0006] In view of this, the purpose of the present application is to provide a forestry waste treatment method for improving forest carbon sequestration capacity, which solves the problems of high management cost, slow composting decomposition rate and incomplete decomposition of forestry waste in-situ composting under conventional methods.

[0007] The present application solves the above technical problems by the following technical means:

[0008] A forest waste treatment method for improving the carbon sequestration capacity of forests, the method being as follows:

[0009] (1) Material crushing: Collecting forest waste branches and crushing them to a particle size of 0.5-5 cm to obtain refined residue;

[0010] (2) Carbon-nitrogen ratio adjustment: Adding a nitrogen source to the refined residue to adjust the carbon-nitrogen ratio;

[0011] (3) Water content and pH adjustment: Adjusting the water content and pH of the refined residue to obtain pretreated residue, then adding a compound microbial liquid and mixing thoroughly, and then adding an enzyme activity regulator and mixing to obtain a pile;

[0012] (4) Pile preparation and composting: Preparing a pile from the pile and composting it to obtain compost, and then returning it to the forest.

[0013] Further, the nitrogen source in step (2) is any one of cow manure, pig manure, chicken manure, seaweed powder, and urea.

[0014] Further, the carbon-nitrogen ratio is adjusted to (25-30):1 in step (2).

[0015] Further, the water content is adjusted to 65-75% and the pH is adjusted to 7-8 in step (3).

[0016] Further, the compound microbial liquid in step (3) is obtained by mixing Bacillus subtilis liquid, Bacillus licheniformis liquid, and high-temperature actinomycete liquid in a volume ratio of 2:1:1, and the concentration of the compound microbial liquid is 1-3×10 9 cfu / ml.

[0017] Further, the enzyme activity regulator comprises the following raw materials:

[0018] Polyethylene glycol, calcium pyrophosphate, 2wt% hydrochloric acid solution, 3-aminobenzene boronic acid, ammonium persulfate, polyethylene glycol diether, curdlan, p-t-butylaniline, graphene, and a pH=12 sodium hydroxide solution.

[0019] Further, the enzyme activity regulator is prepared as follows:

[0020] A: Dissolve polyethylene glycol in water to prepare a 2-5wt% polyethylene glycol solution, place it in a reaction kettle, add calcium pyrophosphate to a 2wt% hydrochloric acid solution, stir to dissolve, then add it to the reaction kettle, heat to 60-80°C and react for 20-40 min, cool to room temperature, adjust the pH to 6-7, add 3-aminobenzene boronic acid and stir to mix evenly, then add ammonium persulfate and polyethylene glycol diether, heat to 55-65°C and stir to react for 2-4 h, cool to room temperature, dry to a water content of 10-20%, then place it in a granulator to prepare granules with a particle size of 2-8 mm;

[0021] B: add curdlan into sodium hydroxide solution with pH=12, after stirring and dissolving, add p-tert-butyl aniline, after stirring at room temperature for 30-60 min, add graphene, stir and mix uniformly, continue to stir and react at 55-65 DEG C for 5-10 min, spray on the surface of the granules while hot, stand overnight at room temperature to obtain the enzyme activity regulator.

[0022] The forestry waste contains a large amount of cellulose and other difficult-to-degrade organic substances, when the composting is carried out, the temperature of the pile gradually rises into the high temperature stage, at this time, the microorganisms are highly active and secrete cellulase to decompose cellulose to produce glucose, when a large amount of glucose is produced by the decomposition of cellulose, the high concentration of glucose will inhibit the activity of cellulase, especially the activity of beta-glucosidase, which affects the decomposition of the remaining cellulose, and further prolongs the composting time and reduces the composting degree, therefore, the enzyme activity regulator is prepared and added into the pile for composting. Specifically, the enzyme activity regulator is prepared by loading 3-aminobenzene boronic acid into polyethylene glycol gel to form granules, and then spraying curdlan to wrap the granules. When the composting enters the high temperature stage, the curdlan wrapped on the surface of the granules is reduced to a liquid state and peeled off from the surface of the granules, at this time, the internal granules are exposed, the 3-aminobenzene boronic acid loaded in the granules adsorbs and combines glucose molecules, reduces the glucose concentration in the surrounding pile, and further reduces the inhibition of high-concentration glucose on the activity of cellulase. Further, the calcium pyrophosphate in the granules enters the pile in the form of ions to further activate the activity of cellulase, so that the enzyme activity regulator reduces the inhibition of high-concentration glucose and activates the enzyme activity to improve the decomposition of cellulose by microorganisms, accelerate the composting rate and the composting degree.

[0023] However, the 3-aminobenzene boronic acid loaded in the polyethylene glycol granules of the enzyme activity regulator adsorbs glucose molecules, and the polyethylene glycol itself has multiple active sites to adsorb amino acids, inorganic salt ions and the like in the pile, and the added calcium pyrophosphate can shield and cover these active sites, thereby reducing the non-specific adsorption of polyethylene glycol granules to inorganic salt ions and the like, and ensuring that the granules can better play the role of adsorbing glucose molecules.

[0024] Since the gel formed by curdlan needs to be reduced from a gel state to a liquid state at a temperature of about 60 DEG C, in order to ensure that the wrapped curdlan can timely separate from the granules to ensure that the granules can effectively play a role, p-tert-butyl aniline is used to treat the curdlan, the liquid transition temperature of which is reduced by reducing the aggregation degree between molecules, and graphene particles are embedded in the curdlan body, the graphene can absorb the surrounding heat to further promote the timely separation of the curdlan, and the graphene has high thermal conductivity to transfer heat in the pile, thereby ensuring the consistency of the temperature in the pile without turning the pile to promote uniform composting of the pile.

[0025] Further, the mass ratio of the polyethylene glycol solution, calcium pyrophosphate, 2wt% hydrochloric acid solution, 3-aminobenzene boronic acid, ammonium persulfate, and polyethylene glycol diether in step A is (3-6):(0.2-0.6):(1-3):(0.5-1):(0.01-0.02):(0.03-0.06).

[0026] Further, the mass ratio of the curdlan, sodium hydroxide solution, p-tert-butyl aniline, and graphene in step B is (1-2):(3-6):(0.1-0.2):(0.04-0.08).

[0027] Further, the mass ratio of the pretreated residue and the enzyme activity regulator is 100:(4-7).

[0028] Beneficial effects:

[0029] The enzyme activity regulator is prepared in the process of in-situ composting of forestry waste, and the enzyme activity regulator adsorbs high-concentration glucose generated in the high-temperature stage to reduce the inhibition of high-concentration glucose on cellulase activity, and further activates cellulase, so that cellulase can further decompose cellulose and the like in the material, shorten the composting time, improve the composting degree, and reduce the composting management cost. The fertilizer formed by composting can effectively improve the physical and chemical properties of the soil in the forest, and then promote the better growth of the forest trees and improve the quality of the forest stand. DETAILED DESCRIPTION

[0030] The application will be described in detail below in combination with specific examples:

[0031] The application discloses a forestry waste treatment method for improving the forest carbon sequestration capacity, and an enzyme activity regulator is prepared before composting of forestry waste.

[0032] Example 1: Preparation of enzyme activity regulator

[0033] A: 4 kg of 3wt% polyethylene glycol solution is prepared by dissolving polyethylene glycol in water and placed in a reaction kettle, 0.4 kg of calcium pyrophosphate is placed in 2 kg of 2wt% hydrochloric acid solution, stirred and dissolved, and then added to the reaction kettle, heated to 70℃ and reacted for 30 min, cooled to room temperature, and then adjusted to pH 6.5, 0.7 kg of 3-aminobenzene boronic acid is added and stirred to mix uniformly, and then 0.015 kg of ammonium persulfate and 0.04 kg of polyethylene glycol diether are added, heated to 60℃ and stirred for 3 h, cooled to room temperature, and then dried at 45℃ to a moisture content of 15%, and then placed in a granulator to form granules with a particle size of 4 mm;

[0034] B: 1.5 kg of curdlan was added to 4.5 kg of sodium hydroxide solution with pH = 12, after stirring and dissolving, 0.5 kg of p-t-butylaniline was added, after stirring and reacting at room temperature for 40 min, 0.05 kg of graphene was added and stirred to mix uniformly, the temperature was raised to 60°C and the stirring reaction was continued for 7 min, and then the mixture was uniformly sprayed on the surface of the granules while hot, the spraying thickness was about 1.5 mm, after standing at room temperature overnight, an enzyme activity regulator was obtained.

[0035] Example 2: Preparation of enzyme activity regulator two

[0036] A: 3 kg of 2 wt% polyethylene glycol solution was prepared by dissolving polyethylene glycol in water and placed in a reaction kettle, 0.2 kg of calcium pyrophosphate was added to 1 kg of 2 wt% hydrochloric acid solution and stirred to dissolve, then added to the reaction kettle, the temperature was raised to 60°C and reacted for 20 min, after cooling to room temperature, the pH was adjusted to 6, 0.5 kg of 3- aminobenzoic acid was added and stirred to mix uniformly, then 0.01 kg of ammonium persulfate and 0.03 kg of polyethylene glycol diether were added, the temperature was raised to 55°C and the stirring reaction was continued for 2 h, after cooling to room temperature, the mixture was dried at 45°C to a moisture content of about 10%, and then placed in a granulator to prepare granules with a particle size of 2 mm;

[0037] B: 1 kg of curdlan was added to 3 kg of sodium hydroxide solution with pH = 12, after stirring and dissolving, 0.1 kg of p-t-butylaniline was added, after stirring and reacting at room temperature for 30 min, 0.04 kg of graphene was added and stirred to mix uniformly, the temperature was raised to 55°C and the stirring reaction was continued for 5 min, and then the mixture was uniformly sprayed on the surface of the granules while hot, the spraying thickness was about 1 mm, after standing at room temperature overnight, an enzyme activity regulator was obtained.

[0038] Example 3: Preparation of enzyme activity regulator three

[0039] A: 6 kg of 4 wt% polyethylene glycol solution was prepared by dissolving polyethylene glycol in water and placed in a reaction kettle, 0.6 kg of calcium pyrophosphate was added to 3 kg of 2 wt% hydrochloric acid solution and stirred to dissolve, then added to the reaction kettle, the temperature was raised to 80°C and reacted for 40 min, after cooling to room temperature, the pH was adjusted to 7, 1 kg of 3- aminobenzoic acid was added and stirred to mix uniformly, then 0.02 kg of ammonium persulfate and 0.06 kg of polyethylene glycol diether were added, the temperature was raised to 65°C and the stirring reaction was continued for 4 h, after cooling to room temperature, the mixture was dried at 45°C to a moisture content of about 18%, and then placed in a granulator to prepare granules with a particle size of 6 mm;

[0040] B: 2 kg of curdlan was added to 6 kg of sodium hydroxide solution with pH = 12, after stirring and dissolving, 0.2 kg of p-t-butylaniline was added, after stirring and reacting at room temperature for 60 min, 0.08 kg of graphene was added and stirred to mix uniformly, the temperature was raised to 65 °C and the stirring reaction was continued for 10 min, and then the mixture was uniformly sprayed on the surface of the granules while hot, the spraying thickness was about 2 mm, and after standing at room temperature overnight, the enzyme activity regulator was obtained.

[0041] Comparative Example 1: Preparation of enzyme activity regulator

[0042] In contrast to Example 1, the only difference is that in Comparative Example 1, no calcium pyrophosphate is added in step A when preparing the enzyme activity regulator, as follows:

[0043] A: 4 kg of 3 wt% polyethylene glycol solution was prepared by dissolving polyethylene glycol in water and placed in a reaction kettle, the pH was adjusted to 6.5, 0.7 kg of 3-aminobenzoic acid was added and stirred to mix uniformly, then 0.015 kg of ammonium persulfate, 0.04 kg of polyethylene glycol diether was added, the temperature was raised to 60 °C and the stirring reaction was continued for 3 h, after cooling to room temperature, it was dried at 45 °C to a moisture content of 15%, then placed in a granulator to make granules with a particle size of 4 mm;

[0044] B: Same as Example 1

[0045] Comparative Example 2: Preparation of enzyme activity regulator

[0046] In contrast to Example 1, the only difference is that in Comparative Example 2, no p-t-butylaniline is added in step B when preparing the enzyme activity regulator, as follows:

[0047] A: Same as Example 1;

[0048] B: 1.5 kg of curdlan was added to 4.5 kg of sodium hydroxide solution with pH = 12, after stirring and dissolving, 0.05 kg of graphene was added and stirred to mix uniformly, the temperature was raised to 60 °C and the stirring reaction was continued for 7 min, and then the mixture was uniformly sprayed on the surface of the granules while hot, the spraying thickness was about 1.5 mm, and after standing at room temperature overnight, the enzyme activity regulator was obtained.

[0049] Comparative Example 3: Preparation of enzyme activity regulator

[0050] In contrast to Example 1, the only difference is that in Comparative Example 3, step B is missing when preparing the enzyme activity regulator, as follows:

[0051] A: 4 kg of 3 wt% polyethylene glycol solution was prepared by dissolving polyethylene glycol in water and put into a reaction kettle, 0.4 kg of calcium pyrophosphate was put into 2 kg of 2 wt% hydrochloric acid solution, stirred and dissolved, then added into the reaction kettle, heated to 70°C for 30 min, cooled to room temperature, adjusted to pH 6.5, added 0.7 kg of 3-aminobenzoic acid, stirred and mixed uniformly, then added 0.015 kg of ammonium persulfate, 0.04 kg of polyethylene glycol diether, heated to 60°C and stirred for 3 h, cooled to room temperature, dried at 45°C to a moisture content of 15%, then put into a granulator to form granules with a particle size of 4 mm, which is an enzyme activity regulator.

[0052] Preparation of enzyme activity regulator

[0053] In comparison with Example 1, the only difference is that in the preparation of enzyme activity regulator in Comparative Example 4, the amount of calcium pyrophosphate added is 0.05 kg, and the rest of the steps are the same as Example 1.

[0054] Preparation of enzyme activity regulator

[0055] In comparison with Example 1, the only difference is that in the preparation of enzyme activity regulator in Comparative Example 5, the amount of calcium pyrophosphate added is 0.8 kg, and the rest of the steps are the same as Example 1.

[0056] Preparation of enzyme activity regulator

[0057] In comparison with Example 1, the only difference is that in the preparation of enzyme activity regulator in Comparative Example 6, it is prepared according to the conventional method, as follows:

[0058] A: 4 kg of 3 wt% polyethylene glycol solution was prepared by dissolving polyethylene glycol in water and put into a reaction kettle, adjusted to pH 6.5, added 0.7 kg of 3-aminobenzoic acid, stirred and mixed uniformly, then added 0.015 kg of ammonium persulfate, 0.04 kg of polyethylene glycol diether, heated to 60°C and stirred for 3 h, cooled to room temperature, dried at 45°C to a moisture content of 15%, then put into a granulator to form granules with a particle size of 4 mm, which is a regulator.

[0059] Preparation of enzyme activity regulator

[0060] In comparison with Example 1, the only difference is that in the preparation of enzyme activity regulator in Comparative Example 1, the polyethylene glycol granules are replaced by activated carbon, as follows:

[0061] The activated carbon is granulated into particles with a particle size of about 4 mm; 1.5 kg of curdlan is added to 4.5 kg of a sodium hydroxide solution with a pH of 12, stirred and dissolved, then 0.5 kg of p-t-butylaniline is added, stirred and reacted at room temperature for 40 min, then 0.05 kg of graphene is added and stirred and mixed uniformly, heated to 60°C and continued to stir and react for 7 min, then uniformly sprayed onto the surface of the activated carbon particles while hot, with a spraying thickness of about 1.5 mm, and left to stand at room temperature overnight to obtain the enzyme activity regulating agent.

[0062] Example 4: Forestry waste treatment method for improving forest carbon sequestration capacity

[0063] The composite microbial liquid used in this example is obtained by mixing Bacillus subtilis liquid with a concentration of about 2 x 10 9 , high-temperature actinomycete liquid, and Bacillus licheniformis liquid in a volume ratio of 2:1:1.

[0064] (1) Material crushing: Collect forestry waste branches, crush in situ to a particle size of about 3 cm to obtain refined residue;

[0065] (2) Carbon-nitrogen ratio adjustment: Add chicken manure to the refined residue to adjust the carbon-nitrogen ratio to 26:1;

[0066] (3) Moisture content and pH adjustment: Adjust the moisture content of the refined residue to 70% and the pH to 7.5 to obtain pretreated residue; uniformly mix the pretreated residue and the composite microbial liquid in a mass ratio of 100:1, then add the enzyme activity regulating agent prepared in Example 1 in a mass ratio of pretreated residue: enzyme activity regulating agent = 100:5, and mix to obtain a pile;

[0067] (4) Pile preparation and composting: The pile is prepared in a trapezoidal shape with a pile height of 2 m, a pile width of 1.5 m, and a pile length of 1.5 m for composting.

[0068] Experiment 1: Forestry waste treatment method for improving forest carbon sequestration capacity

[0069] 1. In order to make a comparison, the enzyme activity regulating agents prepared in Examples 1 and Comparative Examples 1-7 are subjected to a forestry waste composting experiment, which is carried out in a Chinese fir forest in Jinshan Village, Shibao Town, Zhong County, Chongqing. The experiment is divided into 9 groups: experimental group 1, control groups 1-7, and a blank control group. The enzyme activity regulating agents and composting methods used in each group are as follows:

[0070] Experimental group 1: The enzyme activity regulating agent prepared in Example 1 and the composting method of Example 4 are used;

[0071] Control groups 1-7: The enzyme activity regulating agents prepared in Comparative Examples 1-7 and the composting method of Example 4 are used respectively;

[0072] Blank control group: no enzyme activity regulator is used, and the remaining steps are the same as those in Example 4.

[0073] 2. Record the completion time of each group of compost (judged by the temperature reduction of the compost center to normal temperature, no irritating odor emission, and pH stable in the range of 6.5-7.5, the compost is completed), and the cellulose degradation rate of each group is measured after the compost is completed, and the data is shown in Table 1:

[0074] Composting time (d) Cellulose degradation rate (%) Experimental group 1 36 49.67 Control group 1 38 42.55 Control group 2 37 44.29 Control group 3 40 46.13 Control group 4 37 45.96 Control group 5 37 47.52 Control group 6 41 37.47 Control group 7 40 41.94 Blank control 42 28.34

[0075] According to the data analysis of Table 1, it can be known that:

[0076] (1) In the experimental group 1, the enzyme activity regulator prepared by the method of the application is added, which can more efficiently degrade the cellulose in the forestry waste, and shorten the composting time, and the composting time is shortened to 36 days, and the cellulose degradation rate after the composting is completed can reach 49.67%.

[0077] (2) The enzyme activity regulator in the control group 1 fails to effectively activate the cellulase activity due to the absence of calcium pyrophosphate, and more active sites in the sodium alginate gel are exposed to adsorb components including microorganisms in addition to glucose molecules, reducing the adsorption amount of glucose molecules, and further inhibiting the activity of microorganisms and enzymes secreted by them, prolonging the composting time, and the cellulose degradation rate is also significantly reduced;

[0078] (3) In the enzyme activity regulator in the control group 2, the coating layer of pullulan fails to timely and efficiently detach from the colloidal particles at the high-temperature composting stage, limiting the role of the internal colloidal particles; in the enzyme activity regulator in the control group 3, the colloidal particles adsorb low-concentration glucose molecules at the initial stage of composting, which further leads to less carbon source available for microorganisms at the initial stage of composting, reduces the physiological metabolic activity of microorganisms at the initial stage of composting, and prolongs the composting time;

[0079] (4) In the control group 7, the colloidal particles are replaced by activated carbon particles, and the activated carbon indiscriminately adsorbs glucose molecules and substances including cellulase, reducing the concentration of available enzymes, and the enzyme activity is greatly inhibited, and the regulation effect on composting is small, so the composting time is long and the cellulose decomposition rate is low.

[0080] Experiment two: forestry waste afforestation experiment

[0081] The fertilizers obtained by composting the experimental group 1, the control groups 1-7 and the blank control group in experiment 1 are subjected to effect detection experiment. Specifically, the soil in the forest land of Zhongxian Shibao Town Jinshan Village is dug and packed into pots to 2 / 3 of the pots, then 40 one-year-old seedling of Phoebe bournei with consistent growth conditions are planted in the pots with the forest land soil, and then are evenly divided into 9 groups: corresponding to the experimental group 1, the control groups 1-7, the blank control group, 5 pots in each group. After 20 days, the fertilizers obtained by composting in experiment 1 are applied to each group, specifically as follows:

[0082] Experimental group 1: 1 kg of fertilizer obtained by composting in experiment 1 is applied;

[0083] Control groups 1-7: 1 kg of fertilizer obtained by composting in control groups 1-7 in experiment 1 is applied respectively;

[0084] Blank control group: 1 kg of fertilizer obtained by composting in blank control group in experiment 1 is applied.

[0085] The management and protection are carried out according to the same method, then the height growth of Phoebe bournei in each group is measured at 4 months and 8 months after the application of the fertilizer respectively, and the data are shown in Table 2:

[0086] Table 2

[0087]

[0088]

[0089] According to the data analysis of Table 2, it can be known that:

[0090] The fertilizer obtained by composting the forestry waste can provide the nutrients required for the growth of the forest trees, promote the growth of the forest trees and improve the quality of the forest stand. According to the height growth data of each group of experimental group 1, control groups 1-7 and blank control group, the fertilizer obtained by composting the forestry waste by the method of the present application is more completely decomposed, has more sufficient nutrients and has better promoting effect on the growth of the forest trees, which is specifically embodied in that the height growth of Phoebe bournei at 4 months and 8 months after the application of the fertilizer obtained by composting in experimental group 1 in experiment 1 is better than that of control groups 1-7 and the blank control group.

[0091] The above examples are only used to illustrate the technical solutions of the present application but not limit the present application. Although the present application has been described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that the technical solutions of the present application can be modified or replaced equivalently without departing from the purpose and scope of the present application, which should be covered in the scope of the claims of the present application. The technical, shape and structure parts not described in detail in the present application are all known technologies.

Claims

1. A method for treating forestry waste to improve the carbon sequestration capacity of forests, characterized in that, The method is as follows: (1) Material crushing: Collect forestry waste branches and crush them to a particle size of 0.5-5cm to obtain fine material residue; (2) Adjustment of carbon-nitrogen ratio: Add a nitrogen source to the refined slag to adjust the carbon-nitrogen ratio; (3) Adjustment of moisture content and pH: Adjust the moisture content and pH of the refined slag to obtain pretreated slag, then add compound microbial liquid and mix thoroughly, then add enzyme activity regulator and mix thoroughly to obtain stockpile; (4) Composting and composting: After composting the material, it is composted to obtain compost and then used for reforestation; In step (3), the composite microbial solution is obtained by mixing Bacillus subtilis solution, Bacillus licheniformis solution, and thermophilic actinomycete solution in a volume ratio of 2:1:1, and the concentration of the composite microbial solution is 1-3 × 10⁻⁶. 9 cfu / mL; The enzyme activity regulator comprises the following raw materials: Polyethylene glycol, calcium pyrophosphate, 2wt% hydrochloric acid solution, 3-aminophenylboronic acid, ammonium persulfate, polyethylene glycol diether, kerogen gum, p-tert-butylaniline, graphene, sodium hydroxide solution at pH=12.

2. The method for treating forest waste to improve forest carbon sequestration capacity according to claim 1, characterized in that, In step (2), the nitrogen source can be any one of cow dung, pig dung, chicken dung, seaweed powder, or urea.

3. A method for treating forest waste to improve forest carbon sequestration capacity according to claim 2, characterized in that, In step (2), the carbon-nitrogen ratio is adjusted to (25-30):

1.

4. A method for treating forestry waste to improve forest carbon sequestration capacity according to claim 3, characterized in that, In step (3), the water content is adjusted to 65-75%, and the pH is adjusted to 7-8.

5. A method for treating forest waste to improve forest carbon sequestration capacity according to claim 4, characterized in that, The enzyme activity regulator is prepared as follows: A: Dissolve polyethylene glycol in water to prepare a 2-5 wt% polyethylene glycol solution and put it into a reaction vessel. Add calcium pyrophosphate to a 2 wt% hydrochloric acid solution and stir to dissolve it. Then add the solution to the reaction vessel. Heat the mixture to 60-80℃ and react for 20-40 minutes. After cooling to room temperature, adjust the pH to 6-7. Add 3-aminophenylboronic acid and stir to mix evenly. Then add ammonium persulfate and polyethylene glycol diether. Heat the mixture to 55-65℃ and stir to react for 2-4 hours. After cooling to room temperature, dry the mixture until the water content is 10-20%. Then put the mixture into a granulator to make granules with a particle size of 2-8 mm. B: Add guar gum to a sodium hydroxide solution with pH=12, stir to dissolve, then add p-tert-butylaniline, stir at room temperature for 30-60 minutes, then add graphene and stir to mix evenly. Heat to 55-65℃ and continue stirring for 5-10 minutes. Spray the hot mixture onto the surface of the gum particles, and let it stand at room temperature overnight to obtain the enzyme activity regulator.

6. A method for treating forest waste to improve forest carbon sequestration capacity according to claim 5, characterized in that, In step A, the mass ratio of polyethylene glycol solution, calcium pyrophosphate, 2wt% hydrochloric acid solution, 3-aminophenylboronic acid, ammonium persulfate, and polyethylene glycol diether is (3-6):(0.2-0.6):(1-3):(0.5-1):(0.01-0.02):(0.03-0.06).

7. A method for treating forest waste to improve forest carbon sequestration capacity according to claim 6, characterized in that, In step B, the mass ratio of guar gum, sodium hydroxide solution, p-tert-butylaniline, and graphene is (1-2):(3-6):(0.1-0.2):(0.04-0.08).

8. A method for treating forest waste to improve forest carbon sequestration capacity according to claim 1, characterized in that, The mass ratio of the pretreated residue to the enzyme activity regulator is 100:(4-7).

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