CN111849503B - Soil heavy metal pollution remediation composition based on agriculture and forestry residue enzyme, preparation method thereof and soil remediation method thereof - Google Patents
Soil heavy metal pollution remediation composition based on agriculture and forestry residue enzyme, preparation method thereof and soil remediation method thereof Download PDFInfo
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Abstract
A soil heavy metal pollution remediation composition based on agriculture and forestry remainder ferment, a preparation method thereof and a soil remediation method thereof belong to the field of soil remediation materials. The invention aims to solve the technical problem that enzyme prepared from plants polluted by heavy metals is used for solving the problem of remediation of soil polluted by heavy metals. The composite enzyme comprises an enzyme residue compound and an enzyme liquid, wherein the enzyme residue compound is mainly prepared from 10-15 parts by weight of enzyme residue, 2-5 parts by weight of limestone, 2-10 parts by weight of charcoal, 1-10 parts by weight of carbohydrate and 2-5 parts by weight of organic fertilizer, and the enzyme residue and the enzyme liquid are prepared from agricultural and forestry residues. The invention realizes the recycling of the restoration plant resources, further enhances the restoration effect, and can improve the removal rate of the heavy metals in the soil by more than 7.5 percent after one year. The invention is used for soil remediation.
Description
Technical Field
The invention belongs to the field of soil remediation materials; in particular to a soil heavy metal pollution remediation composition based on agriculture and forestry remainder ferment, a preparation method thereof and a soil remediation method thereof.
Background
The restoration of the heavy metal pollution of the soil by using plants is an important means for the treatment of the heavy metal pollution of the soil, and the restoration of the heavy metal soil by using the plants can improve the landscape and beautify the environment and can generate economic benefits. In the process of restoring soil polluted by heavy metals by plants, attention is usually paid to restoration of heavy metals or beautification of the environment by plants, and subsequent cyclic utilization of the plants is ignored, so that popularization and application of plant restoration are severely restricted.
The ferment is prepared from animal, plant, fungus, etc. by fermenting with microorganism and contains specific bioactive components. The ferment has multiple functions, and different formulas and fermentation processes can be used for preparing the ferment with different functions, such as drinks, fertilizers and the like. The enzyme product classification guide rules classify enzymes into six types, namely, edible enzymes, daily chemical enzymes, feed enzymes, agricultural enzymes, environment-friendly enzymes and other enzymes according to the application fields of the products. At present, plant enzyme raw materials are all healthy and pollution-free plants as sources, and the field of enzymes manufactured by plants based on heavy metal pollution is not researched.
Disclosure of Invention
The invention aims to provide a soil heavy metal pollution remediation composition based on agricultural and forestry residue enzyme, a preparation method thereof and a soil remediation method thereof, aiming at solving the problem of soil heavy metal pollution remediation by using enzyme prepared from plants polluted by heavy metal.
The invention is realized by the following technical scheme:
the soil heavy metal pollution repair composition based on the agriculture and forestry remainder enzyme comprises an enzyme residue compound and an enzyme liquid, wherein the enzyme residue compound is mainly prepared from 10-15 parts by weight of enzyme residue, 2-5 parts by weight of limestone, 2-10 parts by weight of biochar, 1-10 parts by weight of saccharides and 2-5 parts by weight of organic fertilizer, and the enzyme residue and the enzyme liquid are prepared from the agriculture and forestry remainder.
The soil heavy metal pollution remediation composition based on the agriculture and forestry residue ferment is characterized in that the saccharide substances comprise brown sugar or white sugar.
The soil heavy metal pollution remediation composition based on the agriculture and forestry residue enzyme comprises 50-70 wt% of organic matters and the total nutrient mass fraction N + P5O2+K2More than 5 percent of O, less than or equal to 30 percent of water content and 5.5-5.8 of pH.
The preparation method of the soil heavy metal pollution remediation composition based on the agriculture and forestry residue ferment comprises the following steps:
step 1, collecting and pretreating agricultural and forestry residue raw materials;
step 2, preparing the agricultural and forestry residue enzyme;
and 3, preparing the soil heavy metal pollution remediation composition based on the agriculture and forestry remainder enzyme.
The invention relates to a preparation method of an agricultural and forestry residue enzyme-based soil heavy metal pollution remediation composition, in the step 1, the agricultural and forestry residues comprise leaves or fallen leaves of coniferous trees, broad-leaved trees, leaves or whole plants of herbaceous plants and leaves or whole plants of waste vegetables, the collected agricultural and forestry residues are washed clean, sheared and dried, and the shearing sizes are no more than 5cm in length, no more than 5cm in width and no more than 2cm in height, so that the treated agricultural and forestry residues are obtained.
The preparation method of the soil heavy metal pollution remediation composition based on the agriculture and forestry residue enzyme comprises the steps of weighing the sugar substance, the treated agriculture and forestry residue and water according to the mass ratio of 1-1.2: 2.5-4.5: 8-12, placing the weighed sugar substance, the treated agriculture and forestry residue and water in a sealed container for fermentation for 6-10 months, and stirring for 1 week in the fermentation process until the fermentation liquor is completely covered by the white foam to obtain the agriculture and forestry residue enzyme.
According to the preparation method of the soil heavy metal pollution remediation composition based on the agriculture and forestry residue ferment, the saccharide substance in the step 2 is brown sugar or white sugar.
According to the preparation method of the soil heavy metal pollution remediation composition based on the agriculture and forestry residue enzyme, in the step 3, the agriculture and forestry residue enzyme is filtered to obtain enzyme residues and enzyme liquid, limestone, biochar, saccharides and organic fertilizer are added into the obtained enzyme residues according to parts by weight, an enzyme residue compound is obtained after uniform stirring, and the obtained enzyme liquid is filled into a container and sealed for storage.
The application method of the soil heavy metal pollution remediation composition based on the agriculture and forestry residue ferment comprises the following steps:
a, digging a pit in a plant root system of heavy metal polluted soil within 100cm, uniformly distributing an enzyme residue compound in the pit, covering soil in situ to mix the enzyme residue compound with the soil, measuring the pH of the soil after 1-5 days, adding limestone into the soil in the pit and uniformly mixing if the pH of the soil is less than 6, and adjusting the pH of the soil to be 6-6.5;
and b, directly pouring 400-500 ml of enzyme liquid into the enzyme residue compound pit, digging a diversion trench to ensure that the plant rhizosphere is lower than the pit, and pouring 400-500 ml of enzyme liquid into the enzyme residue compound pit every month.
According to the application method of the soil heavy metal pollution remediation composition based on the agriculture and forestry remainder enzyme, the adding amount of the enzyme residue compound in the pit in the step a is 1.0-2.5 kg.
The invention has the beneficial effects that:
after the fermentation of the agriculture and forestry residue enzyme is finished, relevant indexes of the agriculture and forestry residue enzyme are measured, and the indexes mainly comprise pH value, total sugar, alcoholic strength, total phenol, total protein, vitamin E, antioxidant capacity, heavy metal content and the like. The determination of the oxidation resistance recommends the use of DPPH method, ABTS method and FRAP method, and the heavy metal species mainly depends on the pollution property of the restored soil.
The application method of the soil heavy metal pollution remediation composition based on the agriculture and forestry remainder enzyme measures the biomass of the plant, the adsorption rate of heavy metals, the heavy metal transfer rate and other indexes after the plant without the enzyme residue compound and the enzyme solution and the same plant with the enzyme residue compound and the enzyme solution are subjected to the same adsorption period, establishes the relationship between the indexes of the environment-friendly enzyme component, the oxidation resistance and the like and the adsorption effect index, and evaluates the soil heavy metal remediation effect enhanced by the plant environment-friendly enzyme. Based on the evaluation data, the subsequent plant environment-friendly enzyme application scheme can be further optimized.
The soil heavy metal pollution remediation composition based on the agriculture and forestry residue enzyme is applied to enhancing phytoremediation of soil heavy metal pollution, and meanwhile, in the most important aspect, the invention focuses on the process of phytoremediation of total metals in soil, so that the cyclic utilization of the phytoremediation resources is realized, the remediation effect is further enhanced, and the removal rate of heavy metals in soil can be improved by more than 7.5% after one year.
The soil heavy metal pollution restoration composition based on the agriculture and forestry remainder enzyme provided by the invention can be used for manufacturing the soil heavy metal pollution restoration composition in a circulating mode.
Drawings
FIG. 1 is a photograph of the ferment of agricultural and forestry residues prepared by the method of one embodiment;
FIG. 2 is a photograph of a processed agricultural and forestry residue material used in accordance with an embodiment;
FIG. 3 is a photograph of a ferment liquid prepared by a method according to an embodiment;
FIG. 4 is a photograph of a ferment residue complex prepared by a method according to an embodiment;
FIG. 5 is a photograph showing the application of the ferment residue complex to soil according to one embodiment.
Detailed Description
The first embodiment is as follows:
the soil heavy metal pollution restoration composition based on the agriculture and forestry residue enzyme comprises an enzyme residue compound and an enzyme liquid, wherein the enzyme residue compound is mainly prepared from 10 parts by weight of enzyme residue, 2 parts by weight of limestone, 5 parts by weight of charcoal, 3 parts by weight of carbohydrate and 3 parts by weight of organic fertilizer, and the enzyme residue and the enzyme liquid are prepared from the agriculture and forestry residue.
In the soil heavy metal pollution remediation composition based on the agriculture and forestry residue ferment, the sugar is brown sugar.
In the soil heavy metal pollution remediation composition based on the agriculture and forestry residue ferment, the organic fertilizer contains 51% of organic matters, 9% of total nutrients, 12% of water and 5.5 of pH.
The preparation method of the soil heavy metal pollution remediation composition based on the agriculture and forestry residue ferment in the embodiment comprises the following steps:
step 1, collecting and pretreating agricultural and forestry residue raw materials;
step 2, preparing the agricultural and forestry residue enzyme;
and 3, preparing the soil heavy metal pollution remediation composition based on the agriculture and forestry remainder enzyme.
In the method for preparing the soil heavy metal pollution remediation composition based on the agriculture and forestry remainder enzyme according to the embodiment, in the step 1, the agriculture and forestry remainder includes leaves or fallen leaves of conifers, broad-leaved trees, leaves or whole plants of herbaceous plants, and leaves or whole plants of waste vegetables, and the collected agriculture and forestry remainder is washed clean, sheared and dried, wherein the shearing size is not more than 5cm in length, not more than 5cm in width, and not more than 2cm in height, so that the treated agriculture and forestry remainder is obtained.
In the preparation method of the soil heavy metal pollution remediation composition based on the agriculture and forestry residue enzyme according to the embodiment, in the step 1, the agriculture and forestry residue is a mixture of 2kg of pine needles, 2kg of ginkgo leaves and 3.57kg of eucommia leaves.
In the preparation method of the agricultural and forestry residue enzyme-based soil heavy metal pollution remediation composition according to the embodiment, in the step 2, the agricultural and forestry residue enzyme preparation method includes weighing the sugar substance, the treated agricultural and forestry residues and the water according to the mass ratio of 2.86:7.57:28.57, placing the weighed sugar substance, the treated agricultural and forestry residues and the water in a sealed container for fermentation for 10 months, and stirring for 1 time in the fermentation process until the white foam completely covers the fermentation liquid, so as to obtain the agricultural and forestry residue enzyme as shown in fig. 1.
In the method for preparing the soil heavy metal pollution remediation composition based on the agriculture and forestry residue ferment according to the embodiment, the sugar substance in the step 2 is brown sugar.
In the method for preparing the soil heavy metal pollution remediation composition based on the agriculture and forestry residue enzyme according to the embodiment, after the agriculture and forestry residue enzyme is filtered in the step 3, enzyme residues and an enzyme liquid are obtained, wherein the enzyme residues are shown in fig. 2, the obtained enzyme liquid is filled in a container and is stored in a sealed manner, the enzyme liquid is shown in fig. 3, and the color of the enzyme liquid is dark yellow. Adding limestone, biochar, saccharides and organic fertilizer into the obtained enzyme residue according to parts by weight, and uniformly stirring to obtain an enzyme residue compound, as shown in fig. 4.
The application method of the soil heavy metal pollution remediation composition based on the agriculture and forestry residue ferment in the embodiment comprises the following steps:
a, digging a pit in the root system of a plant planted in heavy metal polluted soil within 100cm, uniformly distributing an enzyme residue compound in the pit, covering soil in situ to mix the enzyme residue compound with the soil, measuring the pH of the soil to be 6.3 after 1 day, and covering enzyme residues in the pit as shown in a figure 5;
and b, directly pouring 500ml of enzyme liquid into the enzyme residue compound pit, digging a diversion trench to ensure that the plant rhizosphere is lower than the pit, and pouring 500ml of enzyme liquid into the enzyme residue compound pit every month.
In the method for using the soil heavy metal pollution remediation composition based on the agriculture and forestry residue ferment of the present embodiment, the adding amount of the ferment residue compound in the pit in the step a is 2kg, as shown in fig. 5.
In the method for using the soil heavy metal pollution remediation composition based on the agriculture and forestry residue ferment, the pH of the soil is determined to be 6.3.
In the soil heavy metal pollution remediation composition based on the agriculture and forestry residue enzyme, the pH value, total sugar, alcoholic strength, total phenol, total protein, vitamin E, oxidation resistance and Sb, As, Pb and Cd contents in the enzyme solution are measured, wherein the oxidation resistance is measured by a DPPH method, an ABTS method and a FRAP method. The measurement results are shown in table 1:
TABLE 1 fermentation performance of the agricultural and forestry residues according to embodiment one
In the soil heavy metal pollution remediation composition based on the agriculture and forestry remainder enzyme according to the embodiment, the agriculture and forestry remainder enzyme has a pH of 6.4 and contains Sb and Pb heavy metals.
In the method for using the soil heavy metal pollution remediation composition based on the agriculture and forestry residue ferment, compared with a forest not using the ferment residue and the ferment liquid, the forest using the ferment residue and the ferment liquid after one year has a growth amount increased by more than 20%, and a heavy metal removal rate is increased by more than 5%.
The second embodiment is as follows:
the soil heavy metal pollution restoration composition based on the agriculture and forestry residue enzyme comprises an enzyme residue compound and an enzyme liquid, wherein the enzyme residue compound is mainly prepared from 12 parts by weight of enzyme residue, 3 parts by weight of limestone, 2 parts by weight of charcoal, 1 part by weight of carbohydrate and 2 parts by weight of organic fertilizer, and the enzyme residue and the enzyme liquid are prepared from the agriculture and forestry residue.
In the soil heavy metal pollution remediation composition based on the agriculture and forestry residue ferment, the sugar substance is white sugar.
In the soil heavy metal pollution remediation composition based on the agriculture and forestry residue ferment, the organic fertilizer contains 53% of organic matters, 5% of total nutrients, 20% of water and 5.7 of pH.
The preparation method of the soil heavy metal pollution remediation composition based on the agriculture and forestry residue ferment in the embodiment comprises the following steps:
step 1, collecting and pretreating agricultural and forestry residue raw materials;
step 2, preparing the agricultural and forestry residue enzyme;
and 3, preparing the soil heavy metal pollution remediation composition based on the agriculture and forestry remainder enzyme.
In the method for preparing the soil heavy metal pollution remediation composition based on the agriculture and forestry remainder enzyme according to the embodiment, in the step 1, the agriculture and forestry remainder includes leaves or fallen leaves of conifers, broad-leaved trees, leaves or whole plants of herbaceous plants, and leaves or whole plants of waste vegetables, and the collected agriculture and forestry remainder is washed clean, sheared and dried, wherein the shearing size is not more than 5cm in length, not more than 5cm in width, and not more than 2cm in height, so that the treated agriculture and forestry remainder is obtained.
In the method for preparing the soil heavy metal pollution remediation composition based on the agricultural and forestry residue enzyme according to the embodiment, the agricultural and forestry residue in the step 1 is the whole plant of the mesona chinensis benth.
In the preparation method of the agricultural and forestry residue enzyme-based soil heavy metal pollution remediation composition according to the embodiment, in the step 2, the agricultural and forestry residue enzyme preparation method includes weighing the sugar substance, the treated agricultural and forestry residues and the water according to the mass ratio of 4.29:12.86:42.99, placing the weighed sugar substance, the treated agricultural and forestry residues and the water in a sealed container for fermentation for 9 months, and stirring for 1 time in the fermentation process until the fermentation liquor is completely covered by the white foam, so that the agricultural and forestry residue enzyme is obtained.
In the method for preparing the soil heavy metal pollution remediation composition based on the agriculture and forestry residue ferment according to the embodiment, the sugar substance in the step 2 is white sugar.
In the preparation method of the soil heavy metal pollution remediation composition based on the agriculture and forestry residue enzyme, after the agriculture and forestry residue enzyme is filtered in step 3, enzyme residues and enzyme liquid are obtained, limestone, biochar, saccharides and organic fertilizer are added into the obtained enzyme residues according to parts by weight, an enzyme residue compound is obtained after uniform stirring, and the obtained enzyme liquid is filled into a container and sealed for storage.
The application method of the soil heavy metal pollution remediation composition based on the agriculture and forestry residue ferment in the embodiment comprises the following steps:
a, digging a pit in the root system of a plant planted in heavy metal polluted soil within 100cm, uniformly distributing an enzyme residue compound in the pit, covering soil in situ to mix the enzyme residue compound with the soil, and measuring the pH value of the soil to be 6.4 after 2;
and b, directly pouring 500ml of enzyme liquid into the enzyme residue compound pit, digging a diversion trench to ensure that the plant rhizosphere is lower than the pit, and pouring 500ml of enzyme liquid into the enzyme residue compound pit every month.
In the method for using the soil heavy metal pollution remediation composition based on the agriculture and forestry residue ferment of the present embodiment, the adding amount of the ferment residue compound in the pit in the step a is 1.5 kg.
In the soil heavy metal pollution remediation composition based on the agriculture and forestry residue enzyme according to the embodiment, the pH value, total sugar, alcoholic strength, total phenol, total protein, vitamin E and antioxidant capacity of the enzyme solution are measured, wherein the antioxidant capacity is measured by a DPPH method, an ABTS method and a FRAP method. The measurement results are shown in table 2:
TABLE 2 ferment Properties of the agricultural and forestry residues according to embodiment II
In the soil heavy metal pollution remediation composition based on the agriculture and forestry remainder enzyme according to the embodiment, the pH of the agriculture and forestry remainder enzyme is 6.66.
In the method for using the soil heavy metal pollution remediation composition based on the agriculture and forestry residue ferment, compared with a forest not using the ferment residue and the ferment liquid, the forest using the ferment residue and the ferment liquid after one year has a growth amount increased by more than 25%, and a heavy metal removal rate is increased by more than 5%.
The application method of the soil heavy metal pollution remediation composition based on the agriculture and forestry residue ferment can also be applied to a cleaning agent, can well remove various oil stains, and is a good cleaning agent.
The third concrete implementation mode:
the soil heavy metal pollution restoration composition based on the agriculture and forestry remainder enzyme comprises an enzyme residue compound and an enzyme liquid, wherein the enzyme residue compound is mainly prepared from 15 parts by weight of enzyme residue, 5 parts by weight of limestone, 10 parts by weight of charcoal, 10 parts by weight of carbohydrate and 5 parts by weight of organic fertilizer, and the enzyme residue and the enzyme liquid are prepared from the agriculture and forestry remainder.
In the soil heavy metal pollution remediation composition based on the agriculture and forestry residue ferment, the sugar substance is white sugar.
In the soil heavy metal pollution remediation composition based on the agriculture and forestry residue ferment, the organic fertilizer contains 60% of organic matters, 15% of total nutrients, 25% of water and 5.7 of pH.
The preparation method of the soil heavy metal pollution remediation composition based on the agriculture and forestry residue ferment in the embodiment comprises the following steps:
step 1, collecting and pretreating agricultural and forestry residue raw materials;
step 2, preparing the agricultural and forestry residue enzyme;
and 3, preparing the soil heavy metal pollution remediation composition based on the agriculture and forestry remainder enzyme.
In the method for preparing the soil heavy metal pollution remediation composition based on the agriculture and forestry remainder enzyme according to the embodiment, in the step 1, the agriculture and forestry remainder includes leaves or fallen leaves of conifers, broad-leaved trees, leaves or whole plants of herbaceous plants, and leaves or whole plants of waste vegetables, and the collected agriculture and forestry remainder is washed clean, sheared and dried, wherein the shearing size is not more than 5cm in length, not more than 5cm in width, and not more than 2cm in height, so that the treated agriculture and forestry remainder is obtained.
In the preparation method of the soil heavy metal pollution remediation composition based on the agriculture and forestry remainder enzyme, the agriculture and forestry remainder is 6.43kg of waste pumpkins and 6.43kg of waste white gourds.
According to the preparation method of the soil heavy metal pollution remediation composition based on the agriculture and forestry remainder enzyme, in the step 2, the agriculture and forestry remainder enzyme is prepared by weighing the sugar substance, the treated agriculture and forestry remainder and the water according to the mass ratio of 4.29:12.86:42.86, placing the weighed sugar substance, the treated agriculture and forestry remainder and the water in a sealed container for fermentation for 6 months, and stirring for 1 time in the fermentation process until the fermentation liquor is completely covered by the white foam to obtain the agriculture and forestry remainder enzyme.
In the method for preparing the soil heavy metal pollution remediation composition based on the agriculture and forestry residue ferment according to the embodiment, the sugar substance in the step 2 is white sugar.
In the preparation method of the soil heavy metal pollution remediation composition based on the agriculture and forestry residue enzyme, after the agriculture and forestry residue enzyme is filtered in step 3, enzyme residues and enzyme liquid are obtained, limestone, biochar, saccharides and organic fertilizer are added into the obtained enzyme residues according to parts by weight, an enzyme residue compound is obtained after uniform stirring, and the obtained enzyme liquid is filled into a container and sealed for storage.
The application method of the soil heavy metal pollution remediation composition based on the agriculture and forestry residue ferment in the embodiment comprises the following steps:
a, digging a pit in the root system of a plant planted in heavy metal polluted soil within 100cm, uniformly distributing an enzyme residue compound in the pit, covering soil in situ to mix the enzyme residue compound with the soil, and measuring the pH value of the mixed soil to be 6.1 after 3 days;
and b, directly pouring 500ml of enzyme liquid into the enzyme residue compound pit, digging a diversion trench to ensure that the plant rhizosphere is lower than the pit, and pouring 500ml of enzyme liquid into the enzyme residue compound pit every month.
In the method for using the soil heavy metal pollution remediation composition based on the agriculture and forestry residue ferment of the present embodiment, the adding amount of the ferment residue compound in the pit in the step a is 2.5 kg.
In the soil heavy metal pollution remediation composition based on the agriculture and forestry residue enzyme according to the embodiment, the pH value, total sugar, alcoholic strength, total phenol, total protein, vitamin E and antioxidant capacity of the enzyme solution are measured, wherein the antioxidant capacity is measured by a DPPH method, an ABTS method and a FRAP method. The measurement results are shown in table 3:
TABLE 3 ferment Properties of the agricultural and forestry residues according to embodiment III
In the soil heavy metal pollution remediation composition based on the agriculture and forestry remainder enzyme according to the embodiment, the pH of the agriculture and forestry remainder enzyme is 3.69.
In the method for using the soil heavy metal pollution remediation composition based on the agriculture and forestry residue ferment, compared with a forest not using the ferment residue and the ferment liquid, the forest using the ferment residue and the ferment liquid after one year has a growth amount increased by more than 10%, and a heavy metal removal rate is increased by more than 7.5%.
The fourth concrete implementation mode:
the soil heavy metal pollution repair composition based on the agriculture and forestry remainder enzyme comprises an enzyme residue compound and an enzyme liquid, wherein the enzyme residue compound is mainly prepared from 10-15 parts by weight of enzyme residue, 2-5 parts by weight of limestone, 2-10 parts by weight of biochar, 1-10 parts by weight of saccharides and 2-5 parts by weight of organic fertilizer, and the enzyme residue and the enzyme liquid are prepared from the agriculture and forestry remainder.
The soil heavy metal pollution remediation composition based on the agriculture and forestry residue enzyme is applied to enhancing the plant remediation of the soil heavy metal pollution, meanwhile, the plant remediation of the total metal process is focused, the cyclic utilization of the plant resource remediation is realized, the remediation effect is further enhanced, and the removal rate of the heavy metal in the soil after one year can be improved by more than 7.5%.
In the soil heavy metal pollution remediation composition based on the agriculture and forestry residue ferment, the planted plants can be recycled for manufacturing the soil heavy metal pollution remediation composition.
The fifth concrete implementation mode:
according to the fourth embodiment, the agricultural and forestry residue enzyme-based soil heavy metal pollution remediation composition comprises sugar or brown sugar.
The sixth specific implementation mode:
according to a fourth specific embodiment, the soil heavy metal pollution remediation composition based on the agricultural and forestry residue enzyme comprises 50-70 wt% of organic matters and the total nutrient mass fraction is N + P5O2+K2More than 5 percent of O, less than or equal to 30 percent of water content and 5.5-5.8 of pH.
The seventh embodiment:
according to the fourth specific embodiment, the preparation method of the soil heavy metal pollution remediation composition based on the agriculture and forestry remainder ferment comprises the following steps:
step 1, collecting and pretreating agricultural and forestry residue raw materials;
step 2, preparing the agricultural and forestry residue enzyme;
and 3, preparing the soil heavy metal pollution remediation composition based on the agriculture and forestry remainder enzyme.
Detailed description of the invention
According to a seventh embodiment of the invention, in the step 1, the agricultural and forestry residues include coniferous trees, leaves or fallen leaves of broadleaf trees, leaves or whole plants of herbaceous plants, and leaves or whole plants of waste vegetables, the collected agricultural and forestry residues are washed clean, sheared and dried, and the shearing sizes are not more than 5cm in length, not more than 5cm in width, and not more than 2cm in height, so as to obtain the treated agricultural and forestry residues.
Detailed description of the invention
According to a seventh embodiment, in the step 2, the method for preparing the agriculture and forestry remainder enzyme comprises the steps of weighing the sugar substance, the treated agriculture and forestry remainder and the water according to a mass ratio of 1-1.2: 2.5-4.5: 8-12, fermenting the weighed sugar substance, the treated agriculture and forestry remainder and the water in a sealed container for 6-10 months, and stirring for 1 time in the fermentation process for 1 week until the fermentation liquor is completely covered by the white foam, so as to obtain the agriculture and forestry remainder enzyme.
The detailed implementation mode is ten:
according to a seventh embodiment of the method for preparing the soil heavy metal pollution remediation composition based on the agriculture and forestry remainder ferment, the sugar substance in the step 2 is brown sugar or white sugar.
The concrete implementation mode eleven:
according to a seventh embodiment of the invention, in the step 3, the agricultural and forestry residue enzyme is filtered to obtain enzyme residue and enzyme liquid, limestone, biochar, saccharides and organic fertilizer are added to the obtained enzyme residue according to parts by weight, and an enzyme residue compound is obtained after uniform stirring, and the obtained enzyme liquid is filled in a container and sealed for storage.
The specific implementation mode twelve:
according to the fourth embodiment, the application method of the soil heavy metal pollution remediation composition based on the agriculture and forestry remainder ferment comprises the following steps:
a, digging a pit in a plant root system of heavy metal polluted soil within 100cm, uniformly distributing an enzyme residue compound in the pit, covering soil in situ to mix the enzyme residue compound with the soil, measuring the pH of the soil after 1-5 days, adding limestone into the soil in the pit and uniformly mixing if the pH of the soil is less than 6, and adjusting the pH of the soil to be 6-6.5;
and b, directly pouring 400-500 ml of enzyme liquid into the enzyme residue compound pit, digging a diversion trench to ensure that the plant rhizosphere is lower than the pit, and pouring 400-500 ml of enzyme liquid into the enzyme residue compound pit every month.
In the method for using the soil heavy metal pollution remediation composition based on the agriculture and forestry residue enzyme according to the embodiment, after the plant without the enzyme residue compound and the enzyme solution and the same plant with the enzyme residue compound and the enzyme solution experience the same adsorption period, the biomass of the plant, the adsorption rate of heavy metals, the heavy metal transfer rate and other indexes are determined, the relationship between the indexes such as the environment-friendly enzyme component and the oxidation resistance and the adsorption effect index is established, and the plant environment-friendly enzyme reinforced soil heavy metal remediation effect is evaluated. Based on the evaluation data, the subsequent plant environment-friendly enzyme application scheme can be further optimized.
The specific implementation mode is thirteen:
according to a twelfth embodiment of the method for using the soil heavy metal pollution remediation composition based on the agricultural and forestry residue enzymes, in the step a, the amount of the enzyme residue compound added into the pit is 1.0 to 2.5 kg.
Claims (6)
1. The soil heavy metal pollution remediation composition based on the agriculture and forestry remainder enzyme is characterized in that: the soil heavy metal pollution remediation composition based on the agriculture and forestry remainder enzyme comprises an enzyme residue compound and an enzyme liquid, wherein the enzyme residue compound is prepared from 10-15 parts by weight of enzyme residue, 2-5 parts by weight of limestone, 2-10 parts by weight of biochar, 1-10 parts by weight of carbohydrate and 2-5 parts by weight of organic fertilizer;
the organic fertilizer comprises 50-70 wt% of organic matters and the mass fraction of total nutrients N + P5O2+K2More than 5% of O, less than or equal to 30% of water content and pH of 5.5-5.8; what is needed isThe preparation method of the agriculture and forestry remainder enzyme comprises the steps of weighing the sugar substances, the treated agriculture and forestry remainder and water according to the mass ratio of 1-1.2: 2.5-4.5: 8-12, placing the weighed sugar substances, the treated agriculture and forestry remainder and water in a sealed container for fermentation for 6-10 months, and stirring for 1 time in the fermentation process until white foam completely covers fermentation liquor to obtain the agriculture and forestry remainder enzyme.
2. The agricultural and forestry residue enzyme-based soil heavy metal pollution remediation composition according to claim 1, wherein: the saccharide substance comprises brown sugar or white sugar.
3. The preparation method of the agricultural and forestry residue enzyme-based soil heavy metal pollution remediation composition of claim 1, wherein the preparation method comprises the following steps: the method comprises the following steps:
step 1, collecting and pretreating agricultural and forestry residue raw materials;
step 2, preparing the agricultural and forestry residue enzyme;
and 3, filtering the agriculture and forestry remainder enzyme to obtain enzyme residues and enzyme liquid, adding limestone, biochar, saccharides and organic fertilizer into the obtained enzyme residues according to parts by weight, uniformly stirring to obtain an enzyme residue compound, filling the obtained enzyme liquid into a container, and sealing and storing.
4. The method for preparing the soil heavy metal pollution remediation composition based on the agriculture and forestry residue ferment of claim 3, wherein the soil heavy metal pollution remediation composition comprises: and (2) in the step (1), the agriculture and forestry residues comprise coniferous trees, leaves or fallen leaves of broad-leaved trees, leaves or whole plants of herbaceous plants and leaves or whole plants of waste vegetables, and the collected agriculture and forestry residues are washed clean, sheared and dried, wherein the shearing size is that the length is not more than 5cm, the width is not more than 5cm, and the height is not more than 2cm, so that the treated agriculture and forestry residues are obtained.
5. The use method of the agricultural and forestry residue enzyme-based soil heavy metal pollution remediation composition of claim 1, wherein the soil heavy metal pollution remediation composition comprises the following steps: the method comprises the following steps:
a, digging a pit in a plant root system of heavy metal polluted soil within 100cm, uniformly distributing an enzyme residue compound in the pit, covering soil in situ to mix the enzyme residue compound with the soil, measuring the pH of the soil after 1-5 days, adding limestone into the soil in the pit and uniformly mixing if the pH of the soil is less than 6, and adjusting the pH of the soil to be 6-6.5;
and b, directly pouring 400-500 ml of enzyme liquid into the enzyme residue compound pit, digging a diversion trench to ensure that the plant rhizosphere is lower than the pit, and pouring 400-500 ml of enzyme liquid into the enzyme residue compound pit every month.
6. The use method of the agricultural and forestry residue enzyme-based soil heavy metal pollution remediation composition according to claim 5, wherein the soil heavy metal pollution remediation composition comprises the following steps: in the step a, the adding amount of the enzyme residue compound in the pit is 1.0-2.5 kg.
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