Crop straw recycling carbon fixation digital management method and system

Abstract

The present application is suitable for the field of agricultural waste resource utilization and carbon management technology, and provides a crop straw recycling carbon fixation digital management method and system, which comprises the following steps: giving the straw away from the field a unique physical identification, creating a digital identity file, and generating a corresponding unique carbon traceability code; real-time collection of straw storage and transportation link Internet of Things dynamic data, and binding of the storage and transportation link Internet of Things dynamic data with the unique carbon traceability code; according to the digital identity file, estimating the theoretical carbon fixation amount of the straw under different recycling utilization paths, and correcting the theoretical carbon fixation amount to obtain the actual carbon fixation amount; verifying the updated digital identity file to generate a digital carbon asset corresponding to the actual carbon fixation amount and having a unique identification. The present application fundamentally solves the problems of data island and lack of trust under the participation of multiple subjects, and improves the scientificity and accuracy of carbon measurement results.

Description

Technical Field

[0001] This invention belongs to the field of agricultural waste resource utilization and carbon management technology, and in particular relates to a digital management method and system for the recycling and carbon sequestration of crop straw. Background Technology

[0002] Climate change is a common challenge facing the world. Agriculture is a major source of greenhouse gas emissions, but it is also a region with enormous carbon sequestration potential. As a byproduct of agricultural production, crop straw is of great significance for carbon sequestration and emission reduction, improving soil organic matter, and developing biomass energy.

[0003] Currently, the recycling and management of crop straw faces several key technical bottlenecks: From field collection, transportation, and storage to processing and utilization, straw involves multiple stakeholders, including farmers, brokers, transporters, and processing companies. Data is scattered across these stages, making effective data integration difficult. Carbon footprint calculations often rely on post-event manual reporting and sampling estimates, compromising data authenticity, accuracy, and consistency, leading to a crisis of confidence in carbon sequestration assets during trading. Furthermore, current technologies for assessing the carbon sequestration effect of straw utilization often employ default values ​​or static models under laboratory conditions. However, the actual carbon sequestration amount varies significantly depending on the crop variety, origin, and processing technology (e.g., biochar yield and stability at different pyrolysis temperatures). Therefore, existing technologies lack real-time, dynamic process data spanning the entire process, resulting in coarse carbon sequestration calculations that fail to accurately reflect the true emission reduction contribution.

[0004] In summary, there is an urgent need to improve the management scheme for the recycling of crop straw. Summary of the Invention

[0005] The purpose of this invention is to provide a digital management method for the recycling and carbon sequestration of crop straw, aiming to solve the above-mentioned technical problems.

[0006] This invention is implemented as follows: a digital management method for the recycling and carbon sequestration of crop straw includes the following steps: Each straw removed from the field is assigned a unique physical identifier and a digital identity file is created, generating a corresponding unique carbon traceability code; the digital identity file includes information on the straw's origin, variety, collection time, and initial weight. Real-time collection of IoT dynamic data on straw collection, storage and transportation, and binding of the IoT dynamic data on collection, storage and transportation with the unique carbon traceability code to update the digital identity file; Based on the preset carbon sequestration potential assessment model, the theoretical carbon sequestration amount of straw under different recycling paths is estimated according to the digital identity file, and the theoretical carbon sequestration amount is corrected according to the real-time process data of the actual recycling scenario to obtain the actual carbon sequestration amount, while updating the digital identity file. Based on a pre-set blockchain smart contract, the updated digital identity profile is verified to generate a digital carbon asset that corresponds to the actual amount of carbon sequestration and has a unique identifier.

[0007] Furthermore, based on a pre-defined carbon sequestration potential assessment model, the theoretical carbon sequestration amount of straw under different recycling pathways is estimated according to the digital identity file. The theoretical carbon sequestration amount is then corrected based on real-time process data from actual recycling scenarios to obtain the actual carbon sequestration amount. Simultaneously, the digital identity file is updated. This process specifically includes: Based on the origin and variety information in the digital identity file, a preset carbon sequestration potential assessment model is invoked to generate the theoretical carbon sequestration amount of straw under different preset recycling paths, and the theoretical carbon sequestration amount is temporarily stored in the digital identity file. In the actual recycling process, the process parameters under the current recycling path are collected in real time to obtain real-time process data; The real-time process data and the theoretical carbon fixation amount are input into a preset dynamic carbon fixation correction model; the dynamic carbon fixation correction model dynamically corrects the theoretical carbon fixation amount based on the real-time process data to calculate the actual carbon fixation amount of straw. The actual amount of carbon sequestration is associated with the unique carbon traceability code and written into the digital identity file to update the digital identity file.

[0008] Furthermore, the mathematical expression of the carbon sequestration potential assessment model is as follows: ; In the formula, This represents the theoretical carbon sequestration amount under the k-th recycling pathway; Let X be the carbon sequestration prediction function under the k-th recycling path; X is the input feature vector. The model error term is represented by k=1, 2, and 3. When k=1, the straw return to the field path is represented; when k=2, the straw pyrolysis and carbonization path is represented; and when k=3, the straw anaerobic fermentation path is represented.

[0009] Furthermore, the dynamic correction model for carbon sequestration includes: The dynamic correction model for carbon sequestration in straw return path dynamically corrects the theoretical carbon sequestration amount based on soil temperature, soil moisture, return depth, and straw crushing degree in actual recycling scenarios. A dynamic correction model for carbon fixation in the straw pyrolysis and carbonization pathway dynamically corrects the theoretical carbon fixation amount by using the weight coefficients of different carbon pools in actual recycling scenarios and the number of freeze-thaw cycles. A dynamic correction model for carbon sequestration in the anaerobic fermentation pathway of straw dynamically corrects the theoretical carbon sequestration amount based on fermentation temperature, pH value, and organic load rate in actual recycling scenarios.

[0010] Furthermore, based on a pre-set blockchain smart contract, the updated digital identity profile is verified to generate a digital carbon asset with a unique identifier corresponding to the actual carbon sequestration. This process specifically includes: Obtain the digital identity file of the straw that has been recycled, extract the actual carbon sequestration amount, source information, recycling path information and unique carbon traceability code to form a dataset to be verified; The dataset to be verified is submitted to a preset blockchain smart contract, triggering an automatic verification program to obtain the verification result; If the verification result is successful, the blockchain smart contract automatically generates a digital carbon asset with a unique identifier that is equivalent to the actual amount of carbon sequestration, and records the digital carbon asset on the blockchain. According to the preset carbon emission trading account association rules, the generated digital carbon assets are automatically associated with the designated carbon emission trading account, and the association information is written to the blockchain.

[0011] Another objective of this invention is to provide a digital management system for the recycling and carbon sequestration of crop straw, used to implement the aforementioned digital management method for the recycling and carbon sequestration of crop straw, comprising: The digital identity profile creation module is used to assign a unique physical identifier to straw removed from the field and create a digital identity profile, generating a corresponding unique carbon traceability code; the digital identity profile includes information on the origin of the straw, variety information, collection time, and initial weight; The data binding module for collection, storage and transportation is used to collect real-time IoT dynamic data of straw collection, storage and transportation, and bind the IoT dynamic data of collection, storage and transportation with the unique carbon traceability code to update the digital identity file; The carbon sequestration calculation module is used to estimate the theoretical carbon sequestration amount of straw under different recycling paths based on the preset carbon sequestration potential assessment model and the digital identity file, and to correct the theoretical carbon sequestration amount based on the real-time process data of the actual recycling scenario to obtain the actual carbon sequestration amount, while updating the digital identity file. The carbon asset generation module is used to verify the updated digital identity profile based on a preset blockchain smart contract, and generate digital carbon assets that correspond to the actual amount of carbon sequestration and have a unique identifier.

[0012] Furthermore, the carbon sequestration accounting module specifically includes: The theoretical carbon sequestration estimation unit is used to call a preset carbon sequestration potential assessment model based on the origin information and variety information in the digital identity file, generate the theoretical carbon sequestration of straw under different preset recycling paths, and temporarily store the theoretical carbon sequestration in the digital identity file. The process data acquisition unit is used to collect process parameters under the current recycling path in real time during the actual recycling process, and obtain real-time process data. The actual carbon sequestration calculation unit is used to input the real-time process data and the theoretical carbon sequestration into a preset dynamic carbon sequestration correction model; the dynamic carbon sequestration correction model dynamically corrects the theoretical carbon sequestration based on the real-time process data to calculate the actual carbon sequestration of the straw. The carbon sequestration correlation unit is used to associate the actual carbon sequestration with the unique carbon traceability code and write it into the digital identity file to update the digital identity file.

[0013] Furthermore, the carbon asset generation module specifically includes: The unit for acquiring the dataset to be verified is used to acquire the digital identity files of straw that has been recycled, extract the actual carbon sequestration amount, source information, recycling path information and unique carbon traceability code to form the dataset to be verified. The data verification unit is used to submit the dataset to be verified to a preset blockchain smart contract, trigger an automatic verification program, and obtain the verification result. A carbon asset recording unit is used to automatically generate a digital carbon asset with a unique identifier that is equivalent to the actual amount of carbon sequestration if the verification result is passed, and to record the digital carbon asset on the blockchain. The carbon asset association unit is used to automatically associate the generated digital carbon assets with the designated carbon emission trading account according to the preset carbon emission trading account association rules, and write the association information into the blockchain.

[0014] This invention provides a digital management method for the recycling and carbon sequestration of crop straw. By assigning a unique carbon traceability code to straw throughout its entire life cycle, the method encrypts and dynamically updates key data across the entire chain, from straw removal from the field, collection, storage, transportation, recycling to carbon sink certification. This fundamentally solves problems such as data silos and lack of trust in a multi-stakeholder environment. Furthermore, by introducing a carbon sequestration potential assessment model and a dynamic correction mechanism driven by real-time process data, this invention achieves precise and progressive carbon sequestration accounting from theoretical predictions to actual operating conditions, significantly improving the scientific rigor and accuracy of carbon measurement results. Attached Figure Description

[0015] Figure 1A flowchart illustrating the digital management method for recycling and sequestering carbon from crop straw provided in this embodiment of the invention.

[0016] Figure 2 This is a flowchart illustrating step S300 in the digital management method for recycling carbon sequestration of crop straw provided in an embodiment of the present invention.

[0017] Figure 3 This is a flowchart illustrating step S400 in the digital management method for recycling carbon sequestration of crop straw provided in an embodiment of the present invention.

[0018] Figure 4 This is a schematic diagram of the structure of the digital management system for crop straw recycling and carbon sequestration provided in an embodiment of the present invention. Detailed Implementation

[0019] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the invention.

[0020] like Figure 1 As shown, in one embodiment of the present invention, a digital management method for the recycling and carbon sequestration of crop straw is provided, comprising the following steps: S100. Assign a unique physical identifier to the straw removed from the field and create a digital identity file, generating a corresponding unique carbon traceability code; the digital identity file includes the straw's origin information, variety information, collection time, and initial weight; S200. Real-time collection of IoT dynamic data of straw collection, storage and transportation, and binding of the IoT dynamic data of collection, storage and transportation with the unique carbon traceability code, and updating the digital identity file; S300. Based on the preset carbon sequestration potential assessment model, the theoretical carbon sequestration amount of straw under different recycling paths is estimated according to the digital identity file, and the theoretical carbon sequestration amount is corrected according to the real-time process data of the actual recycling scenario to obtain the actual carbon sequestration amount, while updating the digital identity file. S400: Based on a preset blockchain smart contract, verify the updated digital identity file and generate a digital carbon asset that corresponds to the actual amount of carbon sequestration and has a unique identifier.

[0021] In a preferred embodiment of the present invention, step S100 is implemented as follows: In the process of removing crop straw from the field, each batch or each unit package of straw is assigned a unique physical identifier, and the physical identifier is scanned by a mobile terminal. A digital identity file containing the origin information, variety information, collection time, and initial weight is created for each batch or each unit package of straw in the cloud digital management platform, and a corresponding unique carbon traceability code is generated.

[0022] In this embodiment of the invention, by assigning a unique physical identifier to each batch of straw during the straw removal process and simultaneously creating a digital identity file, precise traceability and data anchoring from the source are achieved. This method establishes a one-to-one mapping relationship between physical straw resources and digital carbon management objects. The generated unique carbon traceability code becomes a digital identity card throughout the entire life cycle of straw, laying a solid foundation for accurate data association and traceability in subsequent stages. This fundamentally solves the problems of data fragmentation and unclear origins in traditional management.

[0023] In a preferred embodiment of the present invention, step S200 is implemented as follows: In the straw collection, storage and transportation process, IoT sensing devices installed on transportation vehicles and / or weighbridges are used to collect real-time IoT dynamic data of each batch of straw, such as transportation trajectory data, handover weight data, and storage environment data. The IoT dynamic data of the collection, storage and transportation process is then bound to the aforementioned unique carbon traceability code to update the digital identity file of the straw.

[0024] In this embodiment of the invention, by deploying IoT sensing devices in the collection, storage, and transportation stages and collecting dynamic data such as transportation trajectories, handover weights, and storage environments in real time, the entire straw circulation process is made visible and transparent under supervision. This method transforms the originally scattered and lagging offline records into real-time, automatic online data streams, and deeply binds them with carbon traceability coding. This not only ensures the synchronization and consistency of logistics and information flows, but also provides reliable intermediate process data support for subsequent carbon sequestration accounting, significantly improving the integrity, timeliness, and credibility of the entire chain of data.

[0025] In a preferred embodiment of the present invention, step S300 is implemented as follows: In the straw recycling (resource utilization) stage, based on the variety information and origin information in the digital identity file, combined with a preset carbon sequestration potential assessment model, the theoretical carbon sequestration amount of the batch of straw under different resource utilization paths is estimated. Real-time process data of actual recycling scenarios (such as returning to the field, pyrolysis carbonization, anaerobic fermentation, etc.) are collected by IoT sensors deployed at the recycling site to dynamically correct the theoretical carbon sequestration amount and generate the actual carbon sequestration amount. Specifically, as... Figure 2 As shown, step S300 includes: S310. Based on the origin and variety information in the digital identity file, call the preset carbon sequestration potential assessment model to generate the theoretical carbon sequestration amount of straw under different preset recycling paths, and temporarily store the theoretical carbon sequestration amount in the digital identity file. S320. In the actual recycling process, the process parameters under the current recycling path are collected in real time to obtain real-time process data. S330. Input the real-time process data and the theoretical carbon fixation amount into a preset dynamic carbon fixation correction model; the dynamic carbon fixation correction model dynamically corrects the theoretical carbon fixation amount based on the real-time process data to calculate the actual carbon fixation amount of straw. S340. Associate the actual carbon sequestration amount with the unique carbon traceability code and write it into the digital identity file to update the digital identity file.

[0026] In a preferred embodiment of the present invention, the mathematical expression of the carbon sequestration potential assessment model is: ; In the formula, This represents the theoretical carbon sequestration amount under the k-th recycling pathway; Let X be the carbon sequestration prediction function under the k-th recycling path; X is the input feature vector. The model error term is represented by k=1, 2, and 3. When k=1, the straw return to the field path is represented; when k=2, the straw pyrolysis and carbonization path is represented; and when k=3, the straw anaerobic fermentation path is represented.

[0027] The mechanism of straw return to the field is as follows: after straw is returned to the field, some carbon is converted into stable organic carbon through microbial action and stored in the soil, but CH4 (especially in paddy fields) and N2O are released at the same time; the theoretical carbon sequestration is the increase in soil carbon pool minus the warming equivalent of greenhouse gas emissions. The formula for calculating the theoretical carbon sequestration of the straw return to the field pathway is as follows: ; In the formula, m is the initial mass of the straw; The straw collectability coefficient is determined based on the straw's origin and variety information, and its value generally ranges from 0.68 to 0.88; S c This represents the annual accumulation of soil organic carbon, which is related to the amount of carbon input into the soil from straw. For methane emission flux; This refers to the nitrous oxide emission flux; The global warming potential of methane; The global warming potential of nitrous oxide; The mechanism of straw pyrolysis carbonization is as follows: straw is pyrolyzed into biochar under limited oxygen conditions. Biochar has a highly aromatic structure and can remain stable in the soil for a long time after application, achieving long-term carbon sequestration. Simultaneously, the biomass energy produced during pyrolysis can replace fossil fuels, generating indirect emission reduction benefits. The theoretical carbon sequestration capacity calculation formula for straw pyrolysis carbonization is as follows: ; In the formula, The biochar yield is related to the pyrolysis temperature and the lignin content of the straw. The carbon content of biochar is related to the pyrolysis temperature and the variety of straw, and can be determined experimentally, generally ranging from 50% to 70%; SCS is the biochar stability coefficient, representing the proportion of biochar that is permanently fixed in the soil over a long period, assessed based on the H / C atomic ratio, and typically ranging from 0.7 to 0.9; E p E represents the energy consumption and emissions during the pyrolysis process. t Emissions during transportation; The mechanism of the straw anaerobic fermentation pathway is as follows: straw produces biogas (mainly CH4) through anaerobic fermentation, which replaces fossil fuels and reduces emissions; returning fermentation residue (biogas sludge) to the field can increase soil organic carbon, but the energy consumption and emissions during the fermentation process must be deducted. The theoretical carbon sequestration capacity of the straw anaerobic fermentation pathway is calculated using the following formula: ; In the formula, Methane collection efficiency is related to the airtightness of the fermenter and the gas collection system, and its value is generally 0.85-0.95; GP is the ability (rate) of straw to produce biogas through anaerobic fermentation, which is related to the variety and cellulose content of the straw, and can be determined experimentally. This represents the volume fraction of methane in biogas. C is the density of methane; d The carbon sequestration amount of biogas residue returned to the field, i.e., the amount of undegraded organic carbon in the biogas residue after being applied to the soil, is calculated using the same method as the return-to-field route; E A This refers to the energy consumption emissions during the fermentation process (including energy consumption emissions from processes such as heating and stirring).

[0028] In addition, the aforementioned carbon sequestration potential assessment model can be trained using machine learning algorithms (such as random forest or XGBoost) to optimize the model error term. Training data sources include historical experimental data, existing literature data, and IoT measured data (actual carbon sequestration is fed back to the model for incremental learning).

[0029] In a preferred embodiment of the present invention, the carbon fixation dynamic correction model includes: The dynamic correction model for carbon sequestration in straw return path dynamically corrects the theoretical carbon sequestration amount based on soil temperature, soil moisture, return depth, and straw crushing degree in actual recycling scenarios. A dynamic correction model for carbon fixation in the straw pyrolysis and carbonization pathway dynamically corrects the theoretical carbon fixation amount by using the weight coefficients of different carbon pools in actual recycling scenarios and the number of freeze-thaw cycles. A dynamic correction model for carbon sequestration in the anaerobic fermentation pathway of straw dynamically corrects the theoretical carbon sequestration amount based on fermentation temperature, pH value, and organic load rate in actual recycling scenarios.

[0030] Specifically, the actual carbon sequestration amount of the straw return path is significantly affected by real-time process data such as soil temperature, soil moisture, return depth, and straw crushing degree. The mathematical expression of the dynamic correction model for carbon sequestration of the straw return path is as follows: ; ; ; In the formula, The actual carbon sequestration amount along the straw return-to-field path; F ST is the soil temperature correction factor, used to describe the sensitivity of microbial activity to temperature; Q is the temperature sensitivity coefficient, representing the factor by which the rate of soil organic carbon decomposition increases for every 10°C increase in temperature, with a value generally ranging from 1.5 to 3, which can be determined experimentally based on soil type and organic matter quality; T s Real-time soil temperature; T r For reference temperature, 25℃ is usually taken; F SW W is the soil moisture correction coefficient, and a nonlinear function is used to describe the promoting effect of soil moisture on organic carbon mineralization. s W0 represents the soil water-filling porosity; W0 is the optimal soil water-filling porosity, determined based on soil type and vegetation conditions, generally ranging from 50% to 70%; F SG The tillage method correction coefficient is obtained by referring to tables based on process parameters such as the depth of straw return to the field and the degree of straw crushing. The value range is generally 0.7-1.2. It should be noted that at the same depth of straw return to the field, the higher the degree of straw crushing, the more sufficient the contact with the soil, and the larger the tillage method correction coefficient. At the same degree of straw crushing, the tillage method correction coefficient increases with the increase of the depth of straw return to the field, but it will decrease slightly due to excessive turning at too deep a depth. The core of the actual carbon sequestration capacity of straw pyrolysis carbonization pathway lies in the long-term stability of biochar in the soil, which is also affected by real-time process data such as the number of freeze-thaw cycles. This invention employs a double exponential decay model to describe the degradation kinetics of biochar. The easily decomposable pool (parts not fully carbonized) degrades rapidly in the short term, while the inert pool (highly aromatic structures) remains stable for hundreds of years. The mathematical expression of the dynamic correction model for carbon sequestration in the straw pyrolysis carbonization pathway is as follows: ; ; In the formula, This represents the actual carbon sequestration amount along the straw pyrolysis and carbonization pathway. The weighting coefficient for the i-th carbon library can be determined using a double exponential decay model; for example, 3%-5% for easily decomposable libraries and 95%-97% for inert libraries. n represents the total number of carbon libraries; in this embodiment, n=2, and the carbon libraries include easily decomposable and inert libraries. i Let be the degradation rate constant of the i-th carbon pool, determined by the pyrolysis temperature and straw variety information, and can be fitted and calibrated experimentally; t r The residence time of biochar in the soil; The freeze-thaw cycle is a disturbance factor; the repeated freezing and thawing of pore water in the freeze-thaw cycle generates mechanical stress within the biochar, leading to particle breakage and pore expansion; N FT The number of freeze-thaw cycles is monitored by a soil temperature sensor, and the number of times the temperature crosses 0℃ is counted; d is the average particle size of biochar (usually in mm). , , These are the basic damage coefficient, the cycle accumulation index, and the particle size decay coefficient, respectively, which can be determined through fitting experiments, such as... The value range is 0.001-0.01. The value range is 0.3-0.7. The value range is 0.02-0.1mm. -1 ; The anaerobic fermentation pathway of straw is a complex microbial metabolic process, and its actual gas production efficiency is affected by real-time process data such as fermentation temperature, pH value, and organic loading rate. The mathematical expression of the dynamic correction model for carbon sequestration in the anaerobic fermentation pathway of straw is as follows: ; ; ; ; In the formula, This represents the actual carbon sequestration amount via the anaerobic fermentation pathway of straw; F ATThe fermentation temperature correction factor, based on a microbial growth kinetic model, describes the changes in the activity of methanogens at different temperatures; T A This refers to the real-time fermentation temperature; T min T0 is the minimum growth temperature for methanogens, typically ranging from 20-30℃; T0 is the optimal growth temperature for methanogens, typically ranging from 35-45℃; T0 is the minimum growth temperature for methanogens. max This represents the maximum growth temperature of methanogens, typically ranging from 55-65℃; F AP The pH correction factor is used, and a Gaussian function is employed to describe the activity decay near the optimal pH range; pH A This represents the real-time pH value of the fermentation broth; pH0 is the optimal pH value for methanogens, typically ranging from 6.5 to 7.5. This is a shape parameter that controls the sensitivity to pH deviation; its value typically ranges from 0.5 to 1. F AO This is the organic loading rate correction factor, reflecting the impact of feed rate on stability; R A The real-time organic loading rate is calculated based on the ratio of the mass of volatile solids fed per unit time to the effective volume of the reactor; R0 is the preset optimal organic loading rate, which is preset based on the reactor type, straw variety information, and fermentation temperature.

[0031] In this embodiment of the invention, by introducing a carbon sequestration potential assessment model and a dynamic carbon sequestration correction model, a precise progressive carbon sequestration accounting method is achieved, moving from theoretical prediction to actual correction. This method first estimates the theoretical carbon sequestration amount based on variety and origin attributes, then dynamically corrects it based on real-time process data collected during the recycling process, ultimately outputting a precise carbon sequestration amount that closely matches actual operating conditions. This overcomes the shortcomings of traditional static accounting methods that cannot reflect the impact of process parameter fluctuations, making the carbon sequestration measurement results more scientific and accurate.

[0032] In a preferred embodiment of the present invention, step S400 is implemented as follows: In the carbon sequestration certification and trading process, a blockchain smart contract is used to verify the digital identity file that has completed recycling and has complete data. If the actual carbon sequestration amount, source information, and utilization path information contained therein are all authentic, valid, and tamper-proof, then a digital carbon asset corresponding to the actual carbon sequestration amount and having a unique identifier is automatically generated, and the digital carbon asset is associated with a designated carbon emission trading account; specifically, as shown... Figure 3 As shown, step S400 includes: S410. Obtain the digital identity file of the straw that has been recycled, extract the actual carbon sequestration amount, source information, recycling path information and unique carbon traceability code to form a dataset to be verified. S420. Submit the dataset to be verified to a preset blockchain smart contract to trigger an automatic verification program and obtain the verification result. The blockchain smart contract verifies the integrity, logical consistency and rationality of the actual carbon sequestration of the data according to preset verification rules and outputs the verification result. S430. If the verification result is successful, the blockchain smart contract automatically generates a digital carbon asset with a unique identifier that is equivalent to the actual carbon sequestration amount, and records the digital carbon asset on the blockchain. S440. According to the preset carbon emission trading account association rules, the generated digital carbon assets are automatically associated with the designated carbon emission trading account, and the association information is written to the blockchain.

[0033] In practical applications, blockchain smart contracts are pre-written with the following rules before deployment: I. Verification Rules: The digital identity profile must include a unique carbon traceability code, actual carbon sequestration, and timestamps, among other required fields; the timestamps must be in ascending order (removal from the field → harvesting, storage, and transportation → recycling → carbon sequestration accounting); the actual carbon sequestration must be within the preset range of the theoretical carbon sequestration; the same unique carbon traceability code can only trigger the generation of a digital carbon asset once. II. Carbon Emission Trading Account Association Rules: Each carbon emission trading account holder has a unique wallet address on the blockchain; carbon asset allocation weights are preset (e.g., 80% for suppliers and 20% for users); when no account is registered, digital carbon assets are temporarily stored in the platform's public account and a notification is triggered; III. Transaction Rules: Digital carbon assets are automatically transferred to the unique wallet address of the preset account; on-chain transaction records are generated (including timestamp, unique carbon traceability code hash value, transaction parties, etc.); additional status indicators are added: tradable, locked, and cancelled.

[0034] In this embodiment of the invention, by submitting the completed digital identity file for carbon sequestration accounting to a blockchain smart contract for automated verification and carbon asset issuance, the transformation from straw recycling to carbon asset value is realized. This method utilizes the immutability of blockchain technology and the automatic execution capability of smart contracts to achieve decentralization, transparency, and automation of the carbon sink certification process, significantly reducing manual review costs and trust friction costs. This enables the ecological value of straw recycling to be efficiently and compliantly converted into tradable digital carbon assets, providing a complete technological closed loop for agricultural carbon neutrality.

[0035] like Figure 4 As shown, in another embodiment of the present invention, a digital management system for crop straw recycling and carbon sequestration is also provided to implement the above-mentioned digital management method for crop straw recycling and carbon sequestration, comprising: The digital identity profile creation module 10 is used to assign a unique physical identifier to straw removed from the field and create a digital identity profile, generating a corresponding unique carbon traceability code; the digital identity profile includes the straw's origin information, variety information, collection time, and initial weight; The data binding module 20 for collecting straw collection, storage and transportation data is used to collect IoT dynamic data in the collection, storage and transportation process in real time, and bind the IoT dynamic data in the collection, storage and transportation process with the unique carbon traceability code to update the digital identity file. The carbon sequestration calculation module 30 is used to estimate the theoretical carbon sequestration amount of straw under different recycling paths based on the preset carbon sequestration potential assessment model and the digital identity file, and to correct the theoretical carbon sequestration amount based on the real-time process data of the actual recycling scenario to obtain the actual carbon sequestration amount, while updating the digital identity file. The carbon asset generation module 40 is used to verify the updated digital identity file based on a preset blockchain smart contract, and generate a digital carbon asset that corresponds to the actual amount of carbon sequestration and has a unique identifier.

[0036] In a preferred embodiment of the present invention, the carbon sequestration accounting module 30 specifically includes: The theoretical carbon sequestration estimation unit is used to call a preset carbon sequestration potential assessment model based on the origin information and variety information in the digital identity file, generate the theoretical carbon sequestration of straw under different preset recycling paths, and temporarily store the theoretical carbon sequestration in the digital identity file. The process data acquisition unit is used to collect process parameters under the current recycling path in real time during the actual recycling process, and obtain real-time process data. The actual carbon sequestration calculation unit is used to input the real-time process data and the theoretical carbon sequestration into a preset dynamic carbon sequestration correction model; the dynamic carbon sequestration correction model dynamically corrects the theoretical carbon sequestration based on the real-time process data to calculate the actual carbon sequestration of the straw. The carbon sequestration correlation unit is used to associate the actual carbon sequestration with the unique carbon traceability code and write it into the digital identity file to update the digital identity file.

[0037] In a preferred embodiment of the present invention, the carbon asset generation module 40 specifically includes: The unit for acquiring the dataset to be verified is used to acquire the digital identity files of straw that has been recycled, extract the actual carbon sequestration amount, source information, recycling path information and unique carbon traceability code to form the dataset to be verified. The data verification unit is used to submit the dataset to be verified to a preset blockchain smart contract, trigger an automatic verification program, and obtain the verification result. A carbon asset recording unit is used to automatically generate a digital carbon asset with a unique identifier that is equivalent to the actual amount of carbon sequestration if the verification result is passed, and to record the digital carbon asset on the blockchain. The carbon asset association unit is used to automatically associate the generated digital carbon assets with the designated carbon emission trading account according to the preset carbon emission trading account association rules, and write the association information into the blockchain.

[0038] It should be noted that the above modules and units can be implemented as a computer program, which can run on a computer device. The computer device's memory can store the computer program that makes up the modules or units, enabling the processor to execute the various steps of the above method.

[0039] It should be understood that although the steps in the flowcharts of the embodiments of the present invention are shown sequentially according to the arrows, these steps are not necessarily executed in the order indicated by the arrows. Unless explicitly stated herein, there is no strict order restriction on the execution of these steps, and they can be executed in other orders. Moreover, at least some steps in each embodiment may include multiple sub-steps or multiple stages. These sub-steps or stages are not necessarily completed at the same time, but can be executed at different times. The execution order of these sub-steps or stages is not necessarily sequential, but can be performed alternately or in turn with other steps or at least a portion of the sub-steps or stages of other steps.

[0040] Those skilled in the art will understand that all or part of the processes in the above embodiments can be implemented by a computer program instructing related hardware. The program can be stored in a non-volatile computer-readable storage medium, and when executed, it can include the processes of the embodiments of the above methods.

[0041] The above embodiments merely illustrate several implementation methods of the present invention, and their descriptions are relatively specific and detailed, but they should not be construed as limiting the scope of the present invention. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of the present invention, and these all fall within the protection scope of the present invention. Therefore, the protection scope of this patent should be determined by the appended claims.

Claims

1. A digital management method for the recycling and carbon sequestration of crop straw, characterized in that, Includes the following steps: Assign a unique physical identifier to straw removed from the field and create a digital identity file to generate a corresponding unique carbon traceability code; The digital identity profile includes information on the origin, variety, collection time, and initial weight of the straw. Real-time collection of IoT dynamic data on straw collection, storage and transportation, and binding of the IoT dynamic data on collection, storage and transportation with the unique carbon traceability code to update the digital identity file; Based on the preset carbon sequestration potential assessment model, the theoretical carbon sequestration amount of straw under different recycling paths is estimated according to the digital identity file, and the theoretical carbon sequestration amount is corrected according to the real-time process data of the actual recycling scenario to obtain the actual carbon sequestration amount, while updating the digital identity file. Based on a pre-set blockchain smart contract, the updated digital identity profile is verified to generate a digital carbon asset that corresponds to the actual amount of carbon sequestration and has a unique identifier.

2. The digital management method for crop straw recycling and carbon sequestration according to claim 1, characterized in that, Based on a pre-defined carbon sequestration potential assessment model, and according to the digital identity file, the theoretical carbon sequestration amount of straw under different recycling pathways is estimated. The theoretical carbon sequestration amount is then corrected based on real-time process data from actual recycling scenarios to obtain the actual carbon sequestration amount. Simultaneously, the digital identity file is updated. The specific steps include: Based on the origin and variety information in the digital identity file, a preset carbon sequestration potential assessment model is invoked to generate the theoretical carbon sequestration amount of straw under different preset recycling paths, and the theoretical carbon sequestration amount is temporarily stored in the digital identity file. In the actual recycling process, the process parameters under the current recycling path are collected in real time to obtain real-time process data; The real-time process data and the theoretical carbon fixation amount are input into a preset dynamic carbon fixation correction model; the dynamic carbon fixation correction model dynamically corrects the theoretical carbon fixation amount based on the real-time process data to calculate the actual carbon fixation amount of straw. The actual amount of carbon sequestration is associated with the unique carbon traceability code and written into the digital identity file to update the digital identity file.

3. The digital management method for crop straw recycling and carbon sequestration according to claim 2, characterized in that, The mathematical expression for the carbon sequestration potential assessment model is as follows: ； In the formula, This represents the theoretical carbon sequestration amount under the k-th recycling pathway; Let X be the carbon sequestration prediction function under the k-th recycling path; X is the input feature vector. The model error term is represented by k=1, 2, and 3. When k=1, the straw return to the field path is represented; when k=2, the straw pyrolysis and carbonization path is represented; and when k=3, the straw anaerobic fermentation path is represented.

4. The digital management method for recycling and sequestering carbon from crop straw according to claim 3, characterized in that, The dynamic correction model for carbon fixation includes: The dynamic correction model for carbon sequestration in straw return path dynamically corrects the theoretical carbon sequestration amount based on soil temperature, soil moisture, return depth, and straw crushing degree in actual recycling scenarios. A dynamic correction model for carbon fixation in the straw pyrolysis and carbonization pathway dynamically corrects the theoretical carbon fixation amount by using the weight coefficients of different carbon pools in actual recycling scenarios and the number of freeze-thaw cycles. A dynamic correction model for carbon sequestration in the anaerobic fermentation pathway of straw dynamically corrects the theoretical carbon sequestration amount based on fermentation temperature, pH value, and organic load rate in actual recycling scenarios.

5. The digital management method for crop straw recycling and carbon sequestration according to claim 1, characterized in that, The steps of verifying the updated digital identity profile based on a pre-set blockchain smart contract and generating a uniquely identified digital carbon asset corresponding to the actual carbon sequestration amount specifically include: Obtain the digital identity file of the straw that has been recycled, extract the actual carbon sequestration amount, source information, recycling path information and unique carbon traceability code to form a dataset to be verified; The dataset to be verified is submitted to a preset blockchain smart contract, triggering an automatic verification program to obtain the verification result; If the verification result is successful, the blockchain smart contract automatically generates a digital carbon asset with a unique identifier that is equivalent to the actual amount of carbon sequestration, and records the digital carbon asset on the blockchain. According to the preset carbon emission trading account association rules, the generated digital carbon assets are automatically associated with the designated carbon emission trading account, and the association information is written to the blockchain.

6. A digital management system for the recycling and carbon sequestration of crop straw, used to implement the digital management method for the recycling and carbon sequestration of crop straw as described in any one of claims 1-5, characterized in that, include: The digital identity profile creation module is used to assign a unique physical identifier to straw that has been removed from the field and to create a digital identity profile, generating a corresponding unique carbon traceability code. The digital identity profile includes information on the origin, variety, collection time, and initial weight of the straw. The data binding module for collection, storage and transportation is used to collect real-time IoT dynamic data of straw collection, storage and transportation, and bind the IoT dynamic data of collection, storage and transportation with the unique carbon traceability code to update the digital identity file; The carbon sequestration calculation module is used to estimate the theoretical carbon sequestration amount of straw under different recycling paths based on the preset carbon sequestration potential assessment model and the digital identity file, and to correct the theoretical carbon sequestration amount based on the real-time process data of the actual recycling scenario to obtain the actual carbon sequestration amount, while updating the digital identity file. The carbon asset generation module is used to verify the updated digital identity profile based on a preset blockchain smart contract, and generate digital carbon assets that correspond to the actual amount of carbon sequestration and have a unique identifier.

7. The digital management system for crop straw recycling and carbon sequestration according to claim 6, characterized in that, The carbon sequestration accounting module specifically includes: The theoretical carbon sequestration estimation unit is used to call a preset carbon sequestration potential assessment model based on the origin information and variety information in the digital identity file, generate the theoretical carbon sequestration of straw under different preset recycling paths, and temporarily store the theoretical carbon sequestration in the digital identity file. The process data acquisition unit is used to collect process parameters under the current recycling path in real time during the actual recycling process, and obtain real-time process data. The actual carbon sequestration calculation unit is used to input the real-time process data and the theoretical carbon sequestration into a preset dynamic carbon sequestration correction model; the dynamic carbon sequestration correction model dynamically corrects the theoretical carbon sequestration based on the real-time process data to calculate the actual carbon sequestration of the straw. The carbon sequestration correlation unit is used to associate the actual carbon sequestration with the unique carbon traceability code and write it into the digital identity file to update the digital identity file.

8. The digital management system for crop straw recycling and carbon sequestration according to claim 6, characterized in that, The carbon asset generation module specifically includes: The unit for acquiring the dataset to be verified is used to acquire the digital identity files of straw that has been recycled, extract the actual carbon sequestration amount, source information, recycling path information and unique carbon traceability code to form the dataset to be verified. The data verification unit is used to submit the dataset to be verified to a preset blockchain smart contract, trigger an automatic verification program, and obtain the verification result. A carbon asset recording unit is used to automatically generate a digital carbon asset with a unique identifier that is equivalent to the actual amount of carbon sequestration if the verification result is passed, and to record the digital carbon asset on the blockchain. The carbon asset association unit is used to automatically associate the generated digital carbon assets with the designated carbon emission trading account according to the preset carbon emission trading account association rules, and write the association information into the blockchain.

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