CN114088916A - Method for increasing soil carbon reserve for carbon sequestration agriculture - Google Patents
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Abstract
The invention provides a method for increasing soil carbon reserve for carbon sequestration agriculture, which comprises the following steps: s10, establishing at least one project area, wherein each project area comprises at least one sample band; s20, selecting at least one measuring point in each sample band, and measuring and recording soil parameters of the measuring points; s30, performing operation activities for improving the carbon fixation amount of the soil in the project area; s40, measuring and recording the soil parameters of the measuring points again after operation; s50, calculating the net change value of the soil carbon density of each sample zone in each project area, the total net change value of the soil carbon density of all sample zones in all the project areas and the contribution of a carbon sink reserve buffer area based on the measured soil parameters; the invention has the beneficial effect of effectively increasing the carbon storage of soil and is suitable for the field of carbon sequestration.
Description
Technical Field
The invention belongs to the technical field of carbon sequestration, and particularly relates to a method for increasing soil carbon reserve for carbon sequestration agriculture.
Background
Carbon sequestration agriculture aims at reducing the loss of carbon reserves in the production process and simultaneously improving the productivity and the carbon sequestration; in addition to carbon sequestration, carbon sequestration agriculture also has the benefits of: erosion and soil loss are reduced; improving the soil structure; the soil fertility is increased; reduce soil salinity, enhance disease resistance of soil, vegetation and animals, increase biological diversity, resist drought, and improve water use efficiency.
In addition to carbon sequestration, carbon sequestration agriculture is also considered to be a mechanism by which one can obtain or develop a form of carbon offset, defined as offsetting or offsetting emissions elsewhere with a reduced amount of carbon dioxide greenhouse gas.
Many national governments are implementing carbon sequestration agricultural projects by providing financial incentives to encourage improved land and increased soil carbon sequestration; some of these items measure carbon sequestration efficiency by measuring and recording the amount of carbon-based gas emissions that result from consuming carbon reserves in the soil; such incentives are heavily regulated, and are typically provided in the form of carbon offsets that individuals and companies use to offset carbon emissions from other activities;
the projects that have been implemented are typically strictly regulated to ensure that any potential carbon credit purchaser is credited with good regard to true, measurable and verifiable greenhouse gas emissions reduction; because, most projects involve a high degree of accountability throughout the project application process and the reporting or auditing process following project approval; all of these implemented projects rely to some extent on the development of stored carbon reserves, and therefore, the ability to store and fix carbon is of paramount importance.
With respect to carbon sequestration agriculture, many approaches have emerged in an attempt to satisfy such highly accountable mechanisms, and to seek methods to measure and influence changes in land carbon reserves; existing methods that have emerged to date rely on one or more specific compliance treatments or improvements to a particular plot of land to increase soil carbon reserves; such methods are limited to determining space and time, and do not take into account the inherent factors of climate, geology, and land use diversity associated with a single sheet of land.
Furthermore, the existing methods do not provide any incentive for participants to maintain a land management activity suitable for increasing the carbon reserves of the soil, and therefore many participants, for example, who have planted trees for carbon sequestration, once the planted trees reach the sales size, fell the trees, thereby releasing the captured carbon.
Furthermore, existing methods prescribe a specific land use pattern or treatment process to be undertaken to form the carbon sequestration, and therefore, these methods do not allow for or take into account the possible technological improvements or other innovations that may occur during the project; since technological improvements relating to carbon sequestration projects often present the problem of long project life, this necessarily entails that the project participants have to adopt methods that may not be optimal routine practice within a prescribed time.
Furthermore, existing methods require the participation of a particular individual land owner and the commitment of that land owner to the project. Thus, the assessment risks associated with such projects, and the assessment risks associated with maintaining carbon reserves on land in such projects, must always be high in view of the risks associated with each of the different supporters.
In view of the above, alternative methods of facilitating carbon reserve development maintenance are needed.
Disclosure of Invention
Aiming at the defects in the related technology, the technical problem to be solved by the invention is as follows: the method for increasing the soil carbon reserve for the carbon sequestration agriculture is used for effectively measuring and analyzing the soil carbon content before and after the land operation activities, improving the soil carbon sequestration capacity and further effectively increasing the soil carbon reserve.
In order to solve the technical problems, the technical scheme adopted by the invention is as follows:
a method of increasing soil carbon reserve for carbon sequestration agriculture comprising the steps of:
s10, establishing at least one project area, wherein each project area comprises at least one sample band;
s20, selecting at least one measuring point in each sample band, and measuring and recording soil parameters of the measuring points;
s30, performing operation activities for improving the carbon fixation amount of the soil in the project area;
s40, measuring and recording the soil parameters of the measuring points again after operation;
s50, calculating the net change value of the soil carbon density of each sample zone in each project area, the total net change value of the soil carbon density of all sample zones in all the project areas and the contribution of a carbon sink reserve buffer area based on the measured soil parameters;
wherein the contribution of the carbon sequestration capacity buffer contribution is the difference between the total net change in soil carbon density and the claimed net change in soil carbon density; the total net change in soil carbon density is greater than the claimed net change in soil carbon density.
Preferably, a method of increasing soil carbon reserve for carbon sequestration agriculture, further comprising:
s60, quantifying the net change value of the soil carbon density into a soil carbon reserve and a carbon offset value; wherein the carbon offset value is used to calculate a carbon credit;
s70, managing carbon sink reserve buffering to counter balance variability of soil carbon fixation amounts associated with each project area.
Preferably, in step S30, the business action for increasing the carbon fixation amount of soil includes: one or more of the land management activities performed below;
increasing photosynthesis of vegetation on the soil;
increasing the proportion and duration of the vegetation coverage;
the damage to the soil structure is reduced;
increasing water retention and improving water balance at least 30 cm from the beginning of the soil profile;
promoting the propagation of underground organisms to ensure that the conservation quantity of the underground organisms is higher than the propagation conservation quantity of the organisms above a measurement standard;
promote the multiplication of soil biological groups.
Preferably, in step S10, the method further includes: recording reference information of each sample band in an item area, wherein the item area reference information comprises:
crop/grazing density and crop rotation;
the number of plowing times per year;
any fertilizer type used and application rates by weight per hectare per year;
nitrogen weight percent content of each type of fertilizer used according to data published by the manufacturer;
the type of any biological input/culture used and the rate of application by weight per hectare per year;
the nitrogen weight percent content of each type of biological input/culture used was based on manufacturer published data.
Preferably, in the step S20 and the step S40, soil parameters of the measuring point are measured and recorded, and the recording includes:
and recording the soil sample position of each measuring point and the soil code corresponding to the soil sample position.
Preferably, the method further comprises the following steps:
setting an examination period; and repeating the steps S30-S60 in the assessment period; wherein the assessment period is 5 years.
Preferably, the soil parameters include:
total Carbon (TC), Total Organic Carbon (TOC), soil type/structure, total available phosphorus for plants, and total moisture.
Preferably, the measurement points are: a 15cm deep carbon reservoir in soil.
Preferably, in step S10, each sample band is: there is a generally consistent potential rate of change of soil carbon levels when affected by typical local variations.
Preferably, in step S10, the method further includes: defining a partition for each project area; the defined method comprises: one or more of the following methods;
electronic marker circles, field surveys, enclosure/farm history, hyperspectral imaging, soil maps and aerial photography.
The invention has the beneficial technical effects that:
in the present invention, one or more land operations suitable for enhancing the carbon content of soil may be performed in each project area by initially measuring one or more soil parameters from one or more sample strips from each project area; and before and after the operation, the soil parameters of the measuring points are measured and recorded respectively, and based on the measured soil parameters, the net change value of the soil carbon density of each sample zone in each project area, the total net change value of the soil carbon density of all the sample zones in all the project areas and the contribution of the carbon sink reserve buffer area are calculated, the buffering of carbon sequestration stocks may also act to encourage participants to continue with land management activities, which may improve or maintain soil carbon reserves, and can effectively manage individual changeability, volatility or opportunity risk related to the soil carbon reserve of the discrete project area set, through calculating and managing the carbon reserve buffer area contribution, therefore, the individual risk related to the continuous behavior of maintaining the soil carbon reserves in the given project area is reduced, the soil carbon reserves are effectively increased through the management mode, and the practicability is extremely strong.
Drawings
FIG. 1 is a schematic flow chart of a method for increasing soil carbon reserve for carbon sequestration agriculture according to an embodiment of the present invention;
fig. 2 is a schematic flow chart of a method for increasing soil carbon reserve for carbon sequestration agriculture according to the second embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention. The described embodiments are a subset of the embodiments of the invention and not all embodiments; all other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Next, the present invention will be described in detail with reference to the drawings, and in the detailed description of the embodiments of the present invention, the cross-sectional views illustrating the structure of the device will not be partially enlarged in a general scale for convenience of description, and the drawings are only examples, and should not be construed as limiting the scope of the present invention. In addition, the three-dimensional dimensions of length, width and depth should be included in the actual fabrication.
An embodiment of the present invention is described in detail below with reference to the accompanying drawings.
Example one
FIG. 1 is a schematic flow chart of a method for increasing soil carbon reserve for carbon sequestration agriculture according to an embodiment of the present invention; as shown in fig. 1, a method for increasing carbon reserves in soil for carbon sequestration agriculture, comprising the steps of:
s10, establishing at least one project area, wherein each project area comprises at least one sample band;
s20, selecting at least one measuring point in each sample band, and measuring and recording soil parameters of the measuring points;
s30, performing operation activities for improving the carbon fixation amount of the soil in the project area;
s40, measuring and recording the soil parameters of the measuring points again after operation;
s50, calculating the net change value of the soil carbon density of each sample zone in each project area, the total net change value of the soil carbon density of all sample zones in all the project areas and the contribution of a carbon sink reserve buffer area based on the measured soil parameters;
wherein the contribution of the carbon sequestration capacity buffer contribution is the difference between the total net change in soil carbon density and the claimed net change in soil carbon density; the total net change in soil carbon density is greater than the claimed net change in soil carbon density.
In this embodiment, the carbon sink buffer is configured to inversely balance the variability of the soil carbon fixation amount associated with each project area, so that the total net change in soil carbon density is greater than the claimed net change in soil carbon density; generally, variability in the amount of soil carbon fixation associated with one or more project areas refers to changes or fluctuations in the amount of soil carbon reserve being established and maintained in one or more project areas that may occasionally occur in or between certain soil environments over time due to environmental, biological, climatic and/or other influences or factors; the carbon reserve is measured as a carbon offset or in tons of carbon based on a claimed net change in soil carbon density.
In this embodiment, the term "carbon sequestration buffering" refers to the aggregate or shared variation in soil carbon density, or the aggregate or shared greenhouse gas emission subtraction subtracted from the claimed net soil carbon density variation or the claimed net greenhouse gas emission subtraction, respectively, selected to determine a cancellation value for calculating carbon credit units;
all participants can contribute to the carbon reserve buffer, all contributions are recorded in the book, and according to the overall performance of all project areas over time, the carbon reserve buffer is redistributed to the participants in a possible part after a specified time period, and the redistribution can be carried out according to the initial contribution proportion of the participants to the carbon reserve buffer.
In the present invention, one or more land operations suitable for enhancing the carbon content of soil may be performed in each project area by initially measuring one or more soil parameters from one or more sample strips from each project area; and before and after the operation, the soil parameters of the measuring points are measured and recorded respectively, and based on the measured soil parameters, the net change value of the soil carbon density of each sample zone in each project area, the total net change value of the soil carbon density of all the sample zones in all the project areas and the contribution of the carbon sink reserve buffer area are calculated, the carbon sequestration reserve buffering may also act to encourage participants to continue with land management activities, which may improve or maintain soil carbon reserves, and can effectively manage individual changeability, volatility or opportunity risk related to the soil carbon reserve of the discrete project area set, through calculating and managing the carbon reserve buffer area contribution, therefore, the individual risk related to the continuous behavior of maintaining the soil carbon reserves in the given project area is reduced, the soil carbon reserves are effectively increased through the management mode, and the practicability is extremely strong.
In this embodiment, the step S10 further includes: defining a partition for each project area; the defined method comprises: one or more of the following methods; electronic marker circles, field surveys, enclosure/farm history, hyperspectral imaging, soil maps and aerial photography.
In particular, project areas may be any suitable size, shape, and type of land, project areas may be adjacent to one another, or project areas may be geographically separated from one another; it may be preferred that one or more project areas are geographically separated; typically, each project area may be defined by a geographic boundary, each geographic boundary may be made up of one or more polygons that define discrete areas of land; in this embodiment, each entry region may be further subdivided into one or more sample bands or tiles defined by a single polygon; and may electronically record the waypoints of the polygons or polygons that define the project area and each sample band or patch within the project area.
Further, project areas may be further subdivided into one or more sample zones or tiles according to climate zones, soil type and land utilization, such that each sample zone or tile can be reasonably expected; in defining the project area and one or more sample bands or tiles within the project area, consider: lithology, topographical patterns and elements, current and expected vegetation coverage, grade, drainage, relative elevation, climate, soil type and structure, land utilization, and land management activities; the soil carbon level change rate in the area affected by the typical local change may have consistency, and therefore, in step S10, it is preferable that each sample strip is: there is a generally consistent potential rate of change of soil carbon levels when affected by typical local variations.
Once defined, each sample strip or patch may be assigned to a category according to its combination of climate zone, soil type and land utilization; for example, the climate may be divided into humid tropical regions, arid tropical regions or hills/high lands; the soil types can be classified as sandy/alluvial soil, clay/clay loam or volcanic soil; land use can be divided into grasslands/thin-tree grasslands, wide-ranges/intensive agriculture or forestry/re-establishment vegetation. Based on the combination of climate zones, soil types, and land utilization, any category or combination of categories may be used to define a sample zone or patch.
In this embodiment, the step S10 further includes: recording reference information of each sample band in an item area, wherein the item area reference information comprises:
crop/grazing density and crop rotation;
the number of plowing times per year;
any fertilizer type used and application rates by weight per hectare per year;
nitrogen weight percent content of each type of fertilizer used according to data published by the manufacturer;
the type of any biological input/culture used and the rate of application by weight per hectare per year;
the nitrogen weight percent content of each type of biological input/culture used was based on manufacturer published data.
The present invention should in no way be limited to the categories and combinations of categories given above.
In general, land management activities are activities that increase photosynthesis, which is considered to be a major source of increasing soil carbon reserves by fixing carbon dioxide from the atmosphere; the fixed carbon can be transferred into the soil by the increase in biomass of the plant roots or by other organisms causing photosynthesis, and subsequently by the transfer of carbon structures from the plant or such other organisms on and off the soil.
In this embodiment, the participants of the land management activities can select one of the land management activities or a combination of the land management activities having the ability to increase photosynthesis according to their own land management preferences.
Specifically, in step S30, the business activity of increasing the carbon fixation amount of soil includes: one or more of the land management activities performed below;
increasing photosynthesis of vegetation on the soil;
increasing the proportion and duration of the vegetation coverage;
the damage to the soil structure is reduced;
increasing water retention and improving water balance at least 30 cm from the beginning of the soil profile;
promoting the propagation of underground organisms to ensure that the conservation quantity of the underground organisms is higher than the propagation conservation quantity of the organisms above a measurement standard;
promote the multiplication of soil flora.
Further, if a participant of a land management activity chooses to use biofertilizer/culture instead of chemical fertilizer, the participant needs to verify that the total nitrogen applied per year (by weight) in the project area is lower than that applied under baseline conditions, with minimal farming methods and reduced use of non-biofertilizer for one or more project areas while conducting one or more other land management activities.
Further, at least two land management activities suitable for increasing the carbon fixation of the soil may be performed in the project area; at least two land management activities performed may be matched to project areas, i.e., project areas having dominant land utilization and land type and climate or regional conditions specific to each project area, and to preferences and prior skills of land managers.
Typically, a suitable sample is taken from each sample strip or patch for soil measurement to determine the total mass of carbon present at a depth of 30 cm in the soil of each sample strip or patch; soil measurements follow ISO standard [ ISO10381-2] or other standard procedures suitable for such activities.
Samples may be taken from each sample strip or patch and soil measured at any number of suitable locations and at any number of suitable times; for example, a 20 hectare project area may include 4 sample strips or patches, 2 samples per strip or patch being collected for soil testing; for example, a project area of 5000 hectares may include 15 sample strips or patches, with 6 samples collected per strip or patch for soil testing.
In this embodiment, in step S20 and step S40, the soil parameters at the measurement point are measured and recorded, and the recording includes: and recording the soil sample position of each measuring point and the soil code corresponding to the soil sample position.
Specifically, the measurement points are: a 15cm deep carbon reservoir in soil.
Further, the soil parameters include: total Carbon (TC), Total Organic Carbon (TOC), soil type/structure, total available phosphorus for plants, and total moisture.
Further, after determining one or more soil parameters for each collected soil sample, parameters may be collected from all sample zones or patches within a project area, adjusted to ensure statistical certainty of the overall parameters assigned to each project area.
Further, step S40, after the operation, measuring and recording the soil parameters of the measuring point again; the same method as that of step S20 can be used, such as: total organic carbon analysis can be performed using dry combustion or mid-infrared (MIR) spectroscopy.
In this embodiment, the calculation of the net change in soil carbon density or net reduction of greenhouse gases typically includes a reservoir of soil carbon at a depth of about 30 cm within each project area, the reservoir being calculated from measurements recorded at 15cm from the top of the soil profile.
The net change in soil carbon density and/or net greenhouse gas emission reduction typically also includes an assessment of the land management activities that have been conducted to establish soil carbon sequestration that results in changes in soil carbon reserves.
In calculating the net change in soil carbon density and/or the net reduction in greenhouse gases, the TOC determined in steps S20 and S40 of the present invention may be averaged to calculate an average TOC for each sample band or patch. The average TOC (expressed as a weight percent) for each sample strip or patch can be calculated by averaging all TOC measurements taken from the tested locations within the sample strip or patch at a depth of 15 centimeters.
The calculated standard deviation value for the average TOC measurement for each sample band or patch is also calculated for each sample band or patch; the soil bulk density necessary to convert the percentage of carbon in the sample to carbon density can be estimated from the organic carbon measurements using a combined soil transfer function.
The change in carbon density (in tC/ha) of the sample band or patch after step S40 may be calculated by determining the net change in carbon density of the sample band or patch from the measured values of carbon density determined in steps S20 and S40; the method comprises the following steps: a stratified confidence interval for the change in carbon density of the sample zone or patch, preferably 90%; based on the calculation of the change in carbon density for each sample band or patch, the net reduction in greenhouse gas may then be calculated; the net reduction in greenhouse gas in the project area can be calculated as the sum of all carbon density changes for all sample bands or patches in the project area minus any intestinal emissions.
In particular, intestinal emissions may be calculated in any suitable manner or form based on methane emissions of livestock raised in one or more project areas; then summing the greenhouse gas net reduction amount of all project areas to calculate the greenhouse gas net reduction amount of the project areas; after the net change of the soil carbon density combination or the net emission reduction of the greenhouse gas combination is calculated, the buffering contribution of the carbon sink reserve can be calculated; as with the soil carbon density combined net change or greenhouse gas combined net reduction, the carbon sink reserve buffer contribution may be calculated based on the soil parameter combined net change from one or more sample bands or patches of the project area.
Further, however, typically each project area carbon sequestration contribution represents the difference between the calculated net change in soil carbon density or net reduction in greenhouse gas for the project area and the claimed net change in soil carbon density or net reduction in greenhouse gas for the project area, respectively; the net change in soil carbon density or net greenhouse gas reduction claimed for the project area may be calculated as the product of the calculated net change in soil carbon density or net greenhouse gas reduction and the percentage of carbon sequestration buffered.
For the initial five year period, a 50% carbon sink reserve buffer may be used; in the present invention, applicants have found that 50% may be an ideal buffer of initial carbon sequestration reserves because it provides a high degree of confidence among project participants at all levels by effectively providing an initial reserve equivalent to 100% of all changes in soil carbon density or emissions reduction, which confidence can be exploited to subsequently create incentives to participate in the process, such as carbon sequestration or other trading instruments that may be sold.
In this embodiment, the TOCs determined in steps S20 and S40 of the present invention may be averaged to calculate the average TOC for each sample band or tile as follows:
wherein:
TOCStotal organic carbon, expressed as weight percent, to a depth of 15cm of the sample strip or zone;
TOCsiTOC measurement to a depth of 15cm of the sample band or zoneFixed value, position ('i') expressed in weight percent;
n is the number of locations within the sample strip or patch where soil is being tested.
And defining each sample band or patch to calculate TOCsiStandard deviation of values STOCS；
Soil bulk density can be estimated from organic carbon measurements based on the average of three independent transfer functions:
wherein:
TOC is total organic carbon expressed as mass percent;
the carbon density (in tC/Ha) and standard deviation of each sample band or patch can then be determined from the TOC measurements as follows.
SOCS＝TOCS*BDSDepth DCF 10000 equation (3)
Wherein:
SOCScarbon density to 30 cm depth of sample band/zone piece, in tC/Ha;
TOCSposition (i), expressed as a weight percentage, of the TOC measurement of the sample band/patch;
BDSthe bulk density of the sample band/patch according to equation 2 based on TOCs in units;
the depth is 0.15 m;
DCF-a depth correction factor for deriving carbon density from 15cm to 30 cm depth;
After step S40, the change in carbon density (in tC/ha) of the sample strip or patch can be calculated as follows:
ΔSOCS＝SOCSτ1-SOCSτ0StratumConfidence interval equation 5
Wherein:
ΔSOCSthe carbon density change of the sample band or patch, in tC/Ha units;
SOCSτ1the carbon density of the sample tape or patch measured again in step S40, in tC/Ha units;
SOCSτ0the carbon density of the sample tape or patch measured in step S20, in tC/Ha units;
the layered confidence interval is the 90% confidence interval of the carbon density change of the sample band or the zone piece, and the tC/Ha is taken as a unit; for calculating SOCSτ0And SOCSτ1The confidence interval of the difference between the two can be represented by the following formula;
wherein:
the stratification confidence interval, which is the 90% confidence interval in tC/Ha for the difference between the carbon densities of t1 (step S40) and t0 (step S20) for a given sample band/patch;
Nτ0number of sample bands/tiles at t 0;
Nτ1the number of sample bands/patches at t 1;
the net change in carbon density of the soil in the project area can be calculated by summing all the changes in carbon density for all sample bands or patches within the project area as follows:
wherein:
n delta SOC is the net change of the soil carbon density in the project area and takes tC/Ha as a unit;
ΔSOCi(ii) the change in carbon density of the (i) th sample band or patch, in tC/Ha;
Areaiarea of the (i) th sample band or patch, in Ha.
Example two
As shown in fig. 2, on the basis of the first embodiment, a method for increasing soil carbon reserve for carbon sequestration agriculture further comprises:
s60, quantifying the net change value of the soil carbon density into a soil carbon reserve and a carbon offset value; wherein the carbon offset value is used to calculate a carbon credit;
s70, managing carbon sequestration buffering to counter balance variability in soil carbon fixation associated with each project area.
In this embodiment, the claimed net change in soil carbon density value may be selected to determine a carbon offset value for quantifying the soil carbon reserve being established or maintained; this, in turn, can be used to calculate the carbon credit unit according to the corresponding legal system of the country or entity in which it is located or according to any relevant procedure applicable to the market in which this carbon credit is sold.
In particular, the claimed net change in soil carbon density or the claimed net reduction in greenhouse gas may be selected to serve as a basis for issuing carbon credits according to the respective legal system of the country or entity in which it is located or according to any relevant procedures applicable to the market in which such carbon credits are sold.
Further, the carbon sink reserve buffer of the project area can be calculated as the product of the net change of soil carbon density or the net reduction of greenhouse gas and the remainder of the carbon sink reserve buffer, and is expressed by percentage; depending on the length of time (check period) for which the method of the invention is carried out, it can be set that the total contribution of carbon sequestration buffering will decrease in proportion to the duration of time for which the method is carried out. For example, a method that has been practiced for only 5 years may have a carbon sequestration capacity buffering contribution of 50% of the net change in soil carbon density or net greenhouse gas emission achieved, while a method practiced for more than 10 years may have a partial initial contribution at year 11 back to the carbon sequestration capacity buffering or reduction followed by a recorded revenue with its total carbon sequestration capacity buffering contribution reaching 10% of the net change in soil carbon density or net greenhouse gas emission achieved during that period.
Further, any redistribution contributed from the carbon reserve buffer in the present invention depends on the cumulative performance of all projects over time and is proportional to the contribution made by the project participants to the carbon reserve buffer during the last 5 years of participation; thus, carbon sequestration buffering can simultaneously act to encourage participants to continue with land management activities, which can improve or maintain soil carbon reserves and can effectively manage individual changeability, volatility, or opportunity risks associated with maintaining soil carbon reserves aggregated from discrete project areas.
The net reduction in greenhouse gas for a project area can be calculated by summing all the changes in carbon density for all sample bands or patches within the project area and subtracting all intestinal emissions:
wherein:
NGGA is the net reduction of greenhouse gas in the project area, and the unit is tC02 e;
Δ SOCi ═ th (i) th sample band or patch carbon density change, in tC/Ha units;
area (i) the area of the sample band or patch, in Ha;
CO2e conversion factor-3.67 times the CO2 conversion factor to tCO2 e.
Intestinal emissions may be calculated in any suitable manner or form based on methane emissions of livestock raised in one or more project areas; the net reduced greenhouse gas emissions for all project zones may then be summed to calculate an aggregate net reduced greenhouse gas emission for the project zones:
wherein:
PooledNGGAVNGGA for all project areas, in tCO2e units;
NGGApvthe greenhouse gas emission reduction in project area is in tCO2e units.
After the combined net change in soil carbon density or the combined net reduction in greenhouse gas is calculated, the carbon sequestration contribution may be calculated; however, typically the carbon sequestration capacity contribution from each project area represents the difference between the net change in soil carbon density or the net reduction in greenhouse gases calculated for the project area and the net change in soil carbon density or the net reduction in greenhouse gases claimed for the project area.
The net change in soil carbon density claimed for the project area may be calculated as follows:
CN Δ SOC ═ N Δ SOC × PBN/100 formula 11
Wherein:
CN delta SOC is the net change of soil carbon density claimed by the project area, and takes tC/Ha as a unit;
n Δ SOC is the net change in soil carbon density calculated in the project area, and is given by tC/Ha;
PBN ═ carbon sink buffer number 50, expressed as a percentage.
The net greenhouse gas reduction claimed for the project area may be calculated as follows:
wherein:
NAN, the net reduction volume claimed for the project area in tCO2e units;
NGGN ═ is the net displacement reduction calculated for the project area in tCO2e units;
PSA ═ carbon sequestration buffer number 50, expressed as a percentage.
In the present invention, the claimed net change in soil carbon density may be used to determine a carbon offset value, i.e., which in turn may be used to calculate carbon credit units.
In this embodiment, the carbon sequestration buffer for the project area may be calculated according to the following formula:
buffer ═ N Δ SOC (1- (PBN/100)) formula 13
Wherein:
buffer is the carbon sink reserve Buffer of the project area, and the unit is tC/Ha;
n delta SOC is the net change of the soil carbon density in the project area and takes tC/Ha as a unit;
PEN ═ carbon sink buffer number 50, expressed as a percentage.
In addition, the carbon reserve buffer of the project area may also be calculated according to the following formula:
buffer (NGGA) (1- (PBN/100)) formula 14
Wherein:
buffer-carbon sink reserve Buffer for project area in tCO2e units;
NGGA is the net reduction of greenhouse gas, in tCO2 e;
PEN ═ carbon sink buffer number 50, expressed as a percentage.
The above calculations exemplify the case where the net greenhouse gas reduction is 50% carbon sink buffer.
EXAMPLE III
On the basis of the first embodiment, the method for increasing the soil carbon reserve for the carbon sequestration agriculture further comprises the following steps: setting an examination period; and repeating the steps S30-S60 in the assessment period; wherein the assessment period is 5 years.
In this example, the invention should be implemented within an initial reporting period of five years; step S30 may then be repeated for an additional reporting period of five years, developing business activities for increasing the carbon fixation of the soil in the project area.
For all calculations, taking the carbon sequestration reserve buffering with a net change in soil carbon density of 50%, the total contribution to carbon sequestration reserve buffering will decrease proportionally to the duration of time over which the method of the present invention is performed, depending on the length of time over which the method is performed. For example, a method that has been practiced for only 5 years may have a carbon sequestration reserve buffering contribution of 50% net change in soil carbon density achieved, while a method practiced for more than 10 years may have a partial initial contribution at 11 years back to the carbon sequestration reserve buffering or a reduction in subsequent recorded revenue, with its total carbon sequestration reserve buffering contribution reaching 10% of the net change in soil carbon density achieved during that period.
Any redistribution contributed from the carbon reserve buffer in the present invention depends on the cumulative performance of all projects over time and is proportional to the contribution made by the project participants to the carbon reserve buffer during the previous 5 years of participation in the campaign; thus, carbon sequestration buffering can simultaneously act to encourage participants to continue with land management activities, which can improve or maintain soil carbon reserves, enabling the centralized, efficient management of one or more project areas associated with each project area having one or more individual volatility, or uncertainty.
In addition, in order to better monitor the implementation effect of the invention, the method further comprises the following steps: publishing and permanently storing in spreadsheet form all parameters determined in steps S20 and S40; the published data is accessible to designated external reviewers/validators.
In the description of the present invention, it is to be understood that the terms "mounted," "connected," "secured," and the like are intended to be construed broadly and, for example, as meaning either a fixed connection, a removable connection, or an integral part, unless expressly stated or limited otherwise; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, various embodiments or examples and features of different embodiments or examples described in this specification can be combined and combined by one skilled in the art without contradiction.
In the foregoing embodiments, the descriptions of the respective embodiments have respective emphasis, and for parts that are not described in detail in a certain embodiment, reference may be made to related descriptions of other embodiments.
The modules described as separate parts may or may not be physically separate, and parts displayed as modules may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the units can be selected according to actual needs to achieve the purpose of the solution of the embodiment.
Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; while the invention has been described in detail and with reference to the foregoing embodiments, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present invention.
Claims (10)
1. A method of increasing soil carbon reserve for carbon sequestration agriculture, comprising: the method comprises the following steps:
s10, establishing at least one project area, wherein each project area comprises at least one sample band;
s20, selecting at least one measuring point in each sample band, and measuring and recording soil parameters of the measuring points;
s30, performing operation activities for improving the carbon fixation amount of the soil in the project area;
s40, measuring and recording the soil parameters of the measuring points again after operation;
s50, calculating the net change value of the soil carbon density of each sample zone in each project area, the total net change value of the soil carbon density of all sample zones in all the project areas and the contribution of a carbon sink reserve buffer area based on the measured soil parameters;
wherein the contribution of the carbon sequestration capacity buffer contribution is the difference between the total net change in soil carbon density and the claimed net change in soil carbon density; the total net change in soil carbon density is greater than the claimed net change in soil carbon density.
2. The method of increasing soil carbon reserve for carbon sequestration agriculture according to claim 1, wherein: further comprising:
s60, quantifying the net change value of the soil carbon density into a soil carbon reserve and a carbon offset value; wherein the carbon offset value is used to calculate a carbon credit;
s70, managing carbon sequestration buffering to counter balance variability in soil carbon fixation associated with each project area.
3. The method of increasing soil carbon reserve for carbon sequestration agriculture according to claim 1, wherein: in step S30, the operation for increasing the carbon fixation amount of the soil includes: one or more of the land management activities performed below;
increasing photosynthesis of vegetation on the soil;
increasing the proportion and duration of the vegetation coverage;
the damage to the soil structure is reduced;
increasing water retention and improving water balance at least 30 cm from the beginning of the soil profile;
promoting the propagation of underground organisms to ensure that the conservation quantity of the underground organisms is higher than the propagation conservation quantity of the organisms above a measurement standard;
promote the multiplication of soil biological groups.
4. The method of increasing soil carbon reserve for carbon sequestration agriculture according to claim 1, wherein: in step S10, the method further includes: recording reference information of each sample band in an item area, wherein the item area reference information comprises:
crop/grazing density and crop rotation;
the number of plowing times per year;
any fertilizer type used and application rates by weight per hectare per year;
nitrogen weight percent content of each type of fertilizer used according to data published by the manufacturer;
the type of any biological input/culture used and the rate of application by weight per hectare per year;
the nitrogen weight percent content of each type of biological input/culture used was based on manufacturer published data.
5. The method of increasing soil carbon reserve for carbon sequestration agriculture according to claim 1, wherein: in the step S20 and the step S40, soil parameters of the measurement point are measured and recorded, and the recording includes:
and recording the soil sample position of each measuring point and the soil code corresponding to the soil sample position.
6. A method of increasing soil carbon reserves for carbon sequestration agriculture according to claim 2, wherein: further comprising:
setting an examination period;
and repeating the steps S30-S60 in the assessment period;
wherein the assessment period is 5 years.
7. The method of increasing soil carbon reserve for carbon sequestration agriculture according to claim 1, wherein: the soil parameters include:
total Carbon (TC), Total Organic Carbon (TOC), soil type/structure, total available phosphorus of the plant and total moisture.
8. The method of increasing soil carbon reserve for carbon sequestration agriculture according to claim 7, wherein: the measurement points are as follows: a 15cm deep carbon reservoir in soil.
9. The method of increasing soil carbon reserve for carbon sequestration agriculture according to claim 1, wherein: in step S10, each sample band is: there is a generally consistent potential rate of change of soil carbon levels when affected by typical local variations.
10. The method of increasing soil carbon reserve for carbon sequestration agriculture according to claim 1, wherein: in step S10, the method further includes: defining a partition of each project area; the defined method comprises: one or more of the following methods;
electronic marker circles, field surveys, enclosure/farm history, hyperspectral imaging, soil maps and aerial photography.
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