Article(id=1297211837385307104, tenantId=1146029695717560320, journalId=1296125453100220459, issueId=1297211624738284246, articleNumber=null, orderNo=null, doi=10.11975/j.issn.1002-6819.202510099, pmid=null, cstr=null, oa=null, hot=null, price=null, onlineType=0, articleFormat=0, articleType=null, articleTypeStr=null, receivedDate=1760544000000, receivedDateStr=2025-10-16, revisedDate=1774972800000, revisedDateStr=2026-04-01, acceptedDate=null, acceptedDateStr=null, onlineDate=1787209003063, onlineDateStr=2026-08-20, pubDate=1782748800000, pubDateStr=2026-06-30, doiRegisterDate=null, doiRegisterDateStr=null, onlineIssueDate=1787209003063, onlineIssueDateStr=2026-08-20, onlineJustAcceptDate=null, onlineJustAcceptDateStr=null, onlineFirstDate=null, onlineFirstDateStr=null, sourceXml=null, magXml=null, createTime=1787209003063, creator=13701087609, updateTime=1787209003063, updator=13701087609, issue=Issue{id=1297211624738284246, tenantId=1146029695717560320, journalId=1296125453100220459, year='2026', volume='42', issue='12', pageStart='1', pageEnd='396', issueExtLink='null', onlineDate='null', pubDate='1782748800000', pubDateStr='2026-06-30', beforeIssueId=null, nextIssueId=null, price=null, status=1, issueComplete=1, articleOrder=1, issueType=1, specialIssue=null, createTime=1787208952364, creator='13701087609', updateTime=1787212261177, updator='13701087609', preIssue=null, nextIssue=null, articleTotal=null, ext={EN=IssueExt(id=1297225503002357852, tenantId=1146029695717560320, journalId=1296125453100220459, issueId=1297211624738284246, language=EN, specialIssueTitle=, coverIllustrator=null, specialIssueEditor=, specialIssueAbout=), CN=IssueExt(id=1297225503002357853, tenantId=1146029695717560320, journalId=1296125453100220459, issueId=1297211624738284246, language=CN, specialIssueTitle=, coverIllustrator=null, specialIssueEditor=, specialIssueAbout=)}, issueFiles=null, downloadFileDto=null}, startPage=290, endPage=298, ext={EN=ArticleExt(id=1297211837578245089, articleId=1297211837385307104, tenantId=1146029695717560320, journalId=1296125453100220459, language=EN, title=Spatiotemporal characteristics and explainable prediction of agricultural carbon emissions in Chongqing of China, columnId=1297211819861504848, journalTitle=Transactions of the Chinese Society of Agricultural Engineering, columnName=Agricultural Bioenvironmental and Energy Engineering, runingTitle=null, highlight=null, articleAbstract=
Agricultural carbon emissions have been generated by human activities in vast regions. It is often required to accurately understand the status, spatiotemporal patterns, and future trends of agricultural carbon emissions. It is also crucial to optimize carbon sequestration and emission reduction against climate adaptation. However, current assessments can rely heavily on statistical data, where regions with incomplete statistical records can introduce great uncertainties in carbon accounting and forecasting. Taking Chongqing as a case study, a systematic investigation was conducted to explore the spatiotemporal patterns and future trends of agricultural carbon emissions from 2004 to 2023. Multi-source agricultural data was also combined with statistics and remote sensing monitoring at the county level. Furthermore, spatiotemporal analysis was employed to examine the evolution, including slope estimation, the Mann-Kendall test, Moran's I index, and the Getis-Ord Gi* index. While the prediction models were then constructed for the trends, such as ARIMA and three machine learning methods (support vector machine, random forest, and XGBoost). The results indicate that: 1) The feasible and reliable performance was achieved to evaluate agricultural carbon emission using multi-source data, particularly with the average annual agricultural carbon emission of 2.435 million tons. There was a significant correlation with the conventional statistical data (R2=0.932, P<0.001), thus compensating for missing county-level statistical data. The higher stability was also achieved after evaluation. 2) There were significant source and regional differences in agricultural carbon emissions. The primary sources were methane emissions from rice cultivation and carbon emissions from fertilizer use, with average annual emissions of 1.175 million and 0.809 million tons, respectively. The spatial agglomeration of agricultural carbon emissions was intensified year by year, with the global Moran's I index of 0.695, 0.615, and 0.64 in 2017, 2021, and 2023, respectively. Specifically, Wanzhou, Liangping, and Zhongxian were identified as emission hotspots, with average annual agricultural carbon emissions of 0.106 million, 0.105 million, and 0.089 million tons, respectively; Whereas Nan'an, Jiulongpo, and Beibei were identified as emission cold spots, with average annual emissions of 6.996 thousand, 15.694 thousand, and 29.679 thousand tons, respectively. 3) The interpretable ARIMA-XGBoost prediction model performed well on an independent test set (R²=0.936). The agricultural carbon emissions were shifted from a generally stable state to a more widespread downward trend. Total emissions were projected to gradually decrease from 2.187 million to 1.788 million tons between 2024 and 2030. More significant influencing factors were determined as the rural employees, highway mileage, and gross product in agricultural carbon emissions. Yet there was no variation in the spatially differentiated distribution over counties. Multi-source data can offer information complementarity and reliability to assess regional agricultural carbon emissions. The findings can provide a scientific foundation for low-carbon sequestration and emission reduction. A valuable reference can also serve as the low carbon strategies in similar regions.
, authors=Renfei YANG
1, Fu REN
2, Rui ZHOU
1, *, authorsList=Renfei YANG, Fu REN, Rui ZHOU, authorCompany=null, correspAuthors=Rui ZHOU, authorNote=null, correspAuthorsNote=null, copyrightStatement=Copyright © 2026 Transactions of the Chinese Society of Agricultural Engineering., copyrightOwner=null, extLink=null, articleAbsUrl=null, sourceXml=null, magXml=null, pdfUrl=null, pdf=null, pdfFileSize=null, pdfExtLink=null, richHtmlUrl=null, mobilePdfUrl=null, reviewReport=null, pdfFirstPage=null, abstractGraph=null, abstractGraphContent=null, abstractVideo=null, citation=null, cebUrl=null, magXmlContent=null, mapNumber=null, fund=null), CN=ArticleExt(id=1297211840241628144, articleId=1297211837385307104, tenantId=1146029695717560320, journalId=1296125453100220459, language=CN, title=重庆市农业碳排放时空特征分析与可解释预测, columnId=1297211820012499794, journalTitle=农业工程学报, columnName=农业生物环境与能源工程, runingTitle=null, highlight=null, articleAbstract=
准确理解区域内的农业碳排放状态、格局及变化趋势对科学合理地制定固碳减排政策具有重要意义。该研究以重庆市为例提出一套区域农业碳排放核算、分析及预测框架,融合多源统计与遥感数据核算了2004—2023年的农业碳排放,利用时空分析方法研究农业碳排放格局特征,构建可解释的ARIMA—XGBoost预测模型研究了农业碳排放趋势。结果表明:1)重庆市年均农业碳排放约243.459万t,水稻甲烷和化肥是主要碳源,年均排放量分别达117.525万t和80.933万t。2)重庆市农业碳排放存在显著的时空差异特征,万州、梁平及忠县等区县是碳排放热点,南岸、九龙坡及北碚等区县是碳排放冷点。3)预测显示,重庆市农业碳排放将由2024年的218.709万t逐渐降低至2030年的178.752万t,乡村从业人员、公路里程及农业生产总值等因素对农业碳排放变化的影响较大。研究丰富了区域碳排放评估体系,可为重庆等地的农业农村绿色低碳发展提供科学参考。
, authors=杨任飞
1, 任福
2, 周蕊
1, *, authorsList=杨任飞, 任福, 周蕊, authorCompany=null, correspAuthors=周蕊, authorNote=
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, copyrightStatement=版权所有 © 2026 农业工程学报编辑部, copyrightOwner=null, extLink=null, articleAbsUrl=null, sourceXml=xz2l9UWmF8QUNkSMg3qwXA==, magXml=6+uhaW00mGJLKHUinQbQuA==, pdfUrl=null, pdf=uhNi4XLY1vEuqsmX6dMdjA==, pdfFileSize=2682764, pdfExtLink=null, richHtmlUrl=null, mobilePdfUrl=null, reviewReport=null, pdfFirstPage=null, abstractGraph=3Hf9S6rTeFctHCfnp7eZmA==, abstractGraphContent=null, abstractVideo=null, citation=null, cebUrl=null, magXmlContent=vNJjpWIwnkmiu8awrlvrTg==, mapNumber=null, fund=null)}, authors=[Author(id=1299828268132229383, tenantId=1146029695717560320, journalId=1296125453100220459, articleId=1297211837385307104, orderNo=0, firstName=null, middleName=null, lastName=null, nameCn=null, orcid=null, stid=null, country=null, authorPic=null, dead=0, email=yangrenfei@cqaas.cn, emailSecond=null, emailThird=null, correspondingAuthor=0, authorType=1, ext={EN=AuthorExt(id=1299828268211921161, tenantId=1146029695717560320, journalId=1296125453100220459, articleId=1297211837385307104, authorId=1299828268132229383, language=EN, stringName=Renfei YANG, firstName=Renfei, middleName=null, lastName=YANG, prefix=null, suffix=null, authorComment=null, nameInitials=null, affiliation=null, department=null, xref=
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1Institute of Agricultural Science and Technology Information, Chongqing Academy of Agricultural Sciences, Chongqing 401329, China, bio=null, bioImg=null, bioContent=null, aboutCorrespAuthor=null), CN=AuthorExt(id=1299828268320973066, tenantId=1146029695717560320, journalId=1296125453100220459, articleId=1297211837385307104, authorId=1299828268132229383, language=CN, stringName=杨任飞, firstName=null, middleName=null, lastName=null, prefix=null, suffix=null, authorComment=null, nameInitials=null, affiliation=null, department=null, xref=
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1重庆市农业科学院农业科技信息研究所,重庆 401329, bio={"content":"
杨任飞,博士,高级工程师。研究方向为农业时空信息工程。Email:yangrenfei@cqaas.cn
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杨任飞,博士,高级工程师。研究方向为农业时空信息工程。Email:yangrenfei@cqaas.cn
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2School of Resource and Environment Science, Wuhan University, Wuhan 430079, China, bio=null, bioImg=null, bioContent=null, aboutCorrespAuthor=null), CN=AuthorExt(id=1299828268543271183, tenantId=1146029695717560320, journalId=1296125453100220459, articleId=1297211837385307104, authorId=1299828268383887628, language=CN, stringName=任福, firstName=null, middleName=null, lastName=null, prefix=null, suffix=null, authorComment=null, nameInitials=null, affiliation=null, department=null, xref=
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2武汉大学资源与环境科学学院,武汉 430079, bio=null, bioImg=null, bioContent=null, aboutCorrespAuthor=null)}, companyList=[AuthorCompany(id=1299828268056731907, tenantId=1146029695717560320, journalId=1296125453100220459, articleId=1297211837385307104, xref=2, ext=[AuthorCompanyExt(id=1299828268065120516, tenantId=1146029695717560320, journalId=1296125453100220459, articleId=1297211837385307104, companyId=1299828268056731907, language=EN, country=null, province=null, city=null, postcode=null, companyName=null, departmentName=null, remark=
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2武汉大学资源与环境科学学院,武汉 430079)])]), Author(id=1299828268618768657, tenantId=1146029695717560320, journalId=1296125453100220459, articleId=1297211837385307104, orderNo=2, firstName=null, middleName=null, lastName=null, nameCn=null, orcid=null, stid=null, country=null, authorPic=null, dead=0, email=zhourui@cqaas.cn, emailSecond=null, emailThird=null, correspondingAuthor=1, authorType=1, ext={EN=AuthorExt(id=1299828268723626259, tenantId=1146029695717560320, journalId=1296125453100220459, articleId=1297211837385307104, authorId=1299828268618768657, language=EN, stringName=Rui ZHOU, firstName=Rui, middleName=null, lastName=ZHOU, prefix=null, suffix=null, authorComment=null, nameInitials=null, affiliation=null, department=null, xref=
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1Institute of Agricultural Science and Technology Information, Chongqing Academy of Agricultural Sciences, Chongqing 401329, China, bio=null, bioImg=null, bioContent=null, aboutCorrespAuthor=null), CN=AuthorExt(id=1299828268794929428, tenantId=1146029695717560320, journalId=1296125453100220459, articleId=1297211837385307104, authorId=1299828268618768657, language=CN, stringName=周蕊, firstName=null, middleName=null, lastName=null, prefix=null, suffix=null, authorComment=null, nameInitials=null, affiliation=null, department=null, xref=
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1重庆市农业科学院农业科技信息研究所,重庆 401329, bio=null, bioImg=null, bioContent=null, aboutCorrespAuthor=null)}, companyList=[AuthorCompany(id=1299828267972845824, tenantId=1146029695717560320, journalId=1296125453100220459, articleId=1297211837385307104, xref=1, ext=[AuthorCompanyExt(id=1299828267981234433, tenantId=1146029695717560320, journalId=1296125453100220459, articleId=1297211837385307104, companyId=1299828267972845824, language=EN, country=null, province=null, city=null, postcode=null, companyName=null, departmentName=null, remark=
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1重庆市农业科学院农业科技信息研究所,重庆 401329)])])], keywords=[Keyword(id=1299828268941730069, tenantId=1146029695717560320, journalId=1296125453100220459, articleId=1297211837385307104, language=EN, orderNo=1, keyword=carbon emission), Keyword(id=1299828269000450326, tenantId=1146029695717560320, journalId=1296125453100220459, articleId=1297211837385307104, language=EN, orderNo=2, keyword=spatiotemporal pattern), Keyword(id=1299828269067559191, tenantId=1146029695717560320, journalId=1296125453100220459, articleId=1297211837385307104, language=EN, orderNo=3, keyword=explainable machine learning), Keyword(id=1299828269122085144, tenantId=1146029695717560320, journalId=1296125453100220459, articleId=1297211837385307104, language=EN, orderNo=4, keyword=prediction model), Keyword(id=1299828269193388313, tenantId=1146029695717560320, journalId=1296125453100220459, articleId=1297211837385307104, language=EN, orderNo=5, keyword=Chongqing), Keyword(id=1299828269281468698, tenantId=1146029695717560320, journalId=1296125453100220459, articleId=1297211837385307104, language=CN, orderNo=1, keyword=碳排放), Keyword(id=1299828269386326300, tenantId=1146029695717560320, journalId=1296125453100220459, articleId=1297211837385307104, language=CN, orderNo=2, keyword=时空格局), Keyword(id=1299828269461823772, tenantId=1146029695717560320, journalId=1296125453100220459, articleId=1297211837385307104, language=CN, orderNo=3, keyword=可解释机器学习), Keyword(id=1299828269524738333, tenantId=1146029695717560320, journalId=1296125453100220459, articleId=1297211837385307104, language=CN, orderNo=4, keyword=预测模型), Keyword(id=1299828269579264286, tenantId=1146029695717560320, journalId=1296125453100220459, articleId=1297211837385307104, language=CN, orderNo=5, keyword=重庆市)], refs=[Reference(id=1299828273068925239, tenantId=1146029695717560320, journalId=1296125453100220459, articleId=1297211837385307104, doi=null, pmid=null, pmcid=null, year=null, volume=null, issue=null, pageStart=null, pageEnd=null, url=null, language=null, rfNumber=1, rfOrder=0, authorNames=null, journalName=null, refType=null, unstructuredReference=HULTGREN A, CARLETON T, DELGADO M, et al. 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Overview of the study area, figureFileSmall=zYTf9RCCMHLWW/fRB6D+Qg==, figureFileBig=Tg6VM0FM/K9AE8Q2Vhue4A==, tableContent=null), ArticleFig(id=1299828269843505440, tenantId=1146029695717560320, journalId=1296125453100220459, articleId=1297211837385307104, language=CN, label=图1, caption=
研究区概况, figureFileSmall=zYTf9RCCMHLWW/fRB6D+Qg==, figureFileBig=Tg6VM0FM/K9AE8Q2Vhue4A==, tableContent=null), ArticleFig(id=1299828269948363041, tenantId=1146029695717560320, journalId=1296125453100220459, articleId=1297211837385307104, language=EN, label=Fig.2, caption=
Carbon emissions from agriculture in Chongqing from 2004 to 2023, figureFileSmall=wXLRhbvk8I6ztTXvIxuRCw==, figureFileBig=qz13otV+wi++U7fC+9m3Yg==, tableContent=null), ArticleFig(id=1299828270032249122, tenantId=1146029695717560320, journalId=1296125453100220459, articleId=1297211837385307104, language=CN, label=图2, caption=
2004—2023年重庆市农业碳排放量, figureFileSmall=wXLRhbvk8I6ztTXvIxuRCw==, figureFileBig=qz13otV+wi++U7fC+9m3Yg==, tableContent=null), ArticleFig(id=1299828270128718115, tenantId=1146029695717560320, journalId=1296125453100220459, articleId=1297211837385307104, language=EN, label=Fig.3, caption=
Correlation analysis of two carbon emission accounting, figureFileSmall=9SX15dTIrqc9dG/gZzpS/Q==, figureFileBig=8grs9+GuWeFfBIa5L/NvYg==, tableContent=null), ArticleFig(id=1299828270187438372, tenantId=1146029695717560320, journalId=1296125453100220459, articleId=1297211837385307104, language=CN, label=图3, caption=
两种碳排放核算结果的相关性分析, figureFileSmall=9SX15dTIrqc9dG/gZzpS/Q==, figureFileBig=8grs9+GuWeFfBIa5L/NvYg==, tableContent=null), ArticleFig(id=1299828270262935845, tenantId=1146029695717560320, journalId=1296125453100220459, articleId=1297211837385307104, language=EN, label=Fig.4, caption=
Analysis of the carbon source structure of planting industry in Chongqing, figureFileSmall=OJfLDmSVRsgSRR+L4s9rGw==, figureFileBig=qHvJAw02vViv+B3jQXQOWg==, tableContent=null), ArticleFig(id=1299828270594285862, tenantId=1146029695717560320, journalId=1296125453100220459, articleId=1297211837385307104, language=CN, label=图4, caption=
重庆市种植业碳源结构分析, figureFileSmall=OJfLDmSVRsgSRR+L4s9rGw==, figureFileBig=qHvJAw02vViv+B3jQXQOWg==, tableContent=null), ArticleFig(id=1299828270678171943, tenantId=1146029695717560320, journalId=1296125453100220459, articleId=1297211837385307104, language=EN, label=Fig.5, caption=
Spatial patterns of carbon emission in Chongqing, figureFileSmall=Fu3ah2QzvootjCDdh2zwVQ==, figureFileBig=ztQzdU1YuaN5KM7Ut5axlg==, tableContent=null), ArticleFig(id=1299828270753669416, tenantId=1146029695717560320, journalId=1296125453100220459, articleId=1297211837385307104, language=CN, label=图5, caption=
重庆市碳排放空间格局注:括号内百分数代表置信水平。
, figureFileSmall=Fu3ah2QzvootjCDdh2zwVQ==, figureFileBig=ztQzdU1YuaN5KM7Ut5axlg==, tableContent=null), ArticleFig(id=1299828270808195369, tenantId=1146029695717560320, journalId=1296125453100220459, articleId=1297211837385307104, language=EN, label=Fig.6, caption=
SHAP analysis for predictive models, figureFileSmall=dpWbwo642fHps74gzcY3lQ==, figureFileBig=etuSkCC1FjiJ95kEYQz3qw==, tableContent=null), ArticleFig(id=1299828271013716266, tenantId=1146029695717560320, journalId=1296125453100220459, articleId=1297211837385307104, language=CN, label=图6, caption=
预测模型的SHAP分析结果, figureFileSmall=dpWbwo642fHps74gzcY3lQ==, figureFileBig=etuSkCC1FjiJ95kEYQz3qw==, tableContent=null), ArticleFig(id=1299828271076630827, tenantId=1146029695717560320, journalId=1296125453100220459, articleId=1297211837385307104, language=EN, label=Fig.7, caption=
Carbon emission prediction results of representative years and the changing trends of each county, figureFileSmall=v56OIxGvUGeJ4HzBj5lcZw==, figureFileBig=9yErToFZqTYj8Uv5AvI0Hg==, tableContent=null), ArticleFig(id=1299828271139545388, tenantId=1146029695717560320, journalId=1296125453100220459, articleId=1297211837385307104, language=CN, label=图7, caption=
代表性年份的碳排放预测图与区县变化趋势, figureFileSmall=v56OIxGvUGeJ4HzBj5lcZw==, figureFileBig=9yErToFZqTYj8Uv5AvI0Hg==, tableContent=null), ArticleFig(id=1299828271240208685, tenantId=1146029695717560320, journalId=1296125453100220459, articleId=1297211837385307104, language=EN, label=Tab.1, caption=
Carbon sources and emission factors of agricultural (planting) production
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类型 Type | 项目 Item | 排放系数 Emission coefficient | 单位 Unit | 来源 Sources |
| 注:碳排放以标准碳当量计。下同。 |
| Note: Carbon emissions are measured in standard carbon equivalents. Same below. |
| 作物温室气体 | 水稻CH4 | 257.3 | kg·hm−2 | [31] |
| 水稻N2O | 0.24 | kg·hm−2 | [31] |
| 农业投入品 | 化肥 | 0.8956 | kg·kg−1 | [28–29] |
| 农药 | 4.9341 | kg·kg−1 | [28–29] |
| 农膜 | 5.186 | kg·kg−1 | [28–29] |
| 能源消耗 | 柴油 | 0.5927 | kg·kg−1 | [11] |
| 耕作管理 | 灌溉 | 20.476 | kg·hm−2 | [11] |
| 翻耕 | 3.126 | kg·hm−2 | [32] |
), ArticleFig(id=1299828271391203630, tenantId=1146029695717560320, journalId=1296125453100220459, articleId=1297211837385307104, language=CN, label=表1, caption=
农业(种植业)生产的碳源及排放系数
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类型 Type | 项目 Item | 排放系数 Emission coefficient | 单位 Unit | 来源 Sources |
| 注:碳排放以标准碳当量计。下同。 |
| Note: Carbon emissions are measured in standard carbon equivalents. Same below. |
| 作物温室气体 | 水稻CH4 | 257.3 | kg·hm−2 | [31] |
| 水稻N2O | 0.24 | kg·hm−2 | [31] |
| 农业投入品 | 化肥 | 0.8956 | kg·kg−1 | [28–29] |
| 农药 | 4.9341 | kg·kg−1 | [28–29] |
| 农膜 | 5.186 | kg·kg−1 | [28–29] |
| 能源消耗 | 柴油 | 0.5927 | kg·kg−1 | [11] |
| 耕作管理 | 灌溉 | 20.476 | kg·hm−2 | [11] |
| 翻耕 | 3.126 | kg·hm−2 | [32] |
), ArticleFig(id=1299828271483478319, tenantId=1146029695717560320, journalId=1296125453100220459, articleId=1297211837385307104, language=EN, label=Tab.2, caption=
Variable selection scheme for carbon emission prediction
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变量 Variables | 指标 Indicators | 单位 Unit |
| V1 | 农业生产总值 | 万元 |
| V2 | 农村居民人均生活消费支出 | 元 |
| V3 | 城镇化率 | % |
| V4 | 乡村从业人员 | 万人 |
| V5 | 农村用电量 | kw/h |
| V6 | 公路里程 | km |
), ArticleFig(id=1299828271814828336, tenantId=1146029695717560320, journalId=1296125453100220459, articleId=1297211837385307104, language=CN, label=表2, caption=
碳排放预测的变量选择
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变量 Variables | 指标 Indicators | 单位 Unit |
| V1 | 农业生产总值 | 万元 |
| V2 | 农村居民人均生活消费支出 | 元 |
| V3 | 城镇化率 | % |
| V4 | 乡村从业人员 | 万人 |
| V5 | 农村用电量 | kw/h |
| V6 | 公路里程 | km |
), ArticleFig(id=1299828271890325809, tenantId=1146029695717560320, journalId=1296125453100220459, articleId=1297211837385307104, language=EN, label=Tab.3, caption=
Slope estimation and significance test of carbon emission changes
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类型 Type | 名称 Name | 斜率 Slope | | 名称 Name | 斜率 Slope | | 名称 Name | 斜率 Slope |
注:*表示M-K检验在5%水平下显著。 Note: *indicate significance at the 5% levels by M-K test. |
增长趋势 区县 Growing counties | 梁平 | 0.302 | | 丰都 | 0.144 * | | 南川 | 0.080 * |
| 彭水 | 0.265 * | | 秀山 | 0.129 * | | 巫山 | 0.072 * |
| 涪陵 | 0.201 * | | 奉节 | 0.116 * | | 巫溪 | 0.065 * |
| 开州 | 0.173 * | | 武隆 | 0.099 * | | 云阳 | 0.053 * |
| 酉阳 | 0.172 * | | 忠县 | 0.099 | | 石柱 | 0.048 * |
| 垫江 | 0.167 * | | 黔江 | 0.096 * | | 城口 | 0.026 * |
下降趋势 区县 Declining counties | 巴南 | −0.308 * | | 綦江 | −0.106 * | | 南岸 | −0.037* |
| 合川 | −0.219 * | | 万州 | −0.095 | | 荣昌 | −0.030 |
| 铜梁 | −0.208 * | | 沙坪坝 | −0.081 * | | 潼南 | −0.030 |
| 江津 | −0.176 * | | 大足 | −0.066 | | 大渡口 | −0.025 * |
| 璧山 | −0.149 * | | 北碚 | −0.065* | | 长寿 | −0.003 |
| 永川 | −0.142 * | | 九龙坡 | −0.063* | | 渝中 | −0.001 * |
| 渝北 | −0.125 * | | 江北 | −0.055* | | | |
), ArticleFig(id=1299828271953240370, tenantId=1146029695717560320, journalId=1296125453100220459, articleId=1297211837385307104, language=CN, label=表3, caption=
区县碳排放变化的斜率估计与显著性检验
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类型 Type | 名称 Name | 斜率 Slope | | 名称 Name | 斜率 Slope | | 名称 Name | 斜率 Slope |
注:*表示M-K检验在5%水平下显著。 Note: *indicate significance at the 5% levels by M-K test. |
增长趋势 区县 Growing counties | 梁平 | 0.302 | | 丰都 | 0.144 * | | 南川 | 0.080 * |
| 彭水 | 0.265 * | | 秀山 | 0.129 * | | 巫山 | 0.072 * |
| 涪陵 | 0.201 * | | 奉节 | 0.116 * | | 巫溪 | 0.065 * |
| 开州 | 0.173 * | | 武隆 | 0.099 * | | 云阳 | 0.053 * |
| 酉阳 | 0.172 * | | 忠县 | 0.099 | | 石柱 | 0.048 * |
| 垫江 | 0.167 * | | 黔江 | 0.096 * | | 城口 | 0.026 * |
下降趋势 区县 Declining counties | 巴南 | −0.308 * | | 綦江 | −0.106 * | | 南岸 | −0.037* |
| 合川 | −0.219 * | | 万州 | −0.095 | | 荣昌 | −0.030 |
| 铜梁 | −0.208 * | | 沙坪坝 | −0.081 * | | 潼南 | −0.030 |
| 江津 | −0.176 * | | 大足 | −0.066 | | 大渡口 | −0.025 * |
| 璧山 | −0.149 * | | 北碚 | −0.065* | | 长寿 | −0.003 |
| 永川 | −0.142 * | | 九龙坡 | −0.063* | | 渝中 | −0.001 * |
| 渝北 | −0.125 * | | 江北 | −0.055* | | | |
), ArticleFig(id=1299828272020349235, tenantId=1146029695717560320, journalId=1296125453100220459, articleId=1297211837385307104, language=EN, label=Tab.4, caption=
Global Moran’I index of agriculture carbon emission of Chongqing
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年份 Year | Moran’s I | 年份 Year | Moran’s I | 年份 Year | Moran’s I |
| 注:*表示在5%水平下显著。 |
| Note: *indicate significance at the 5% levels. |
| 2004 | 0.254* | 2011 | 0.359* | 2018 | 0.505* |
| 2005 | 0.284* | 2012 | 0.434* | 2019 | 0.531* |
| 2006 | 0.258* | 2013 | 0.475* | 2020 | 0.482* |
| 2007 | 0.255* | 2014 | 0.495* | 2021 | 0.615* |
| 2008 | 0.286* | 2015 | 0.480* | 2022 | 0.595* |
| 2009 | 0.324* | 2016 | 0.545* | 2023 | 0.640* |
| 2010 | 0.337* | 2017 | 0.695* | | |
), ArticleFig(id=1299828272267813172, tenantId=1146029695717560320, journalId=1296125453100220459, articleId=1297211837385307104, language=CN, label=表4, caption=
重庆市农业碳排放全局莫兰指数
, figureFileSmall=null, figureFileBig=null, tableContent=
年份 Year | Moran’s I | 年份 Year | Moran’s I | 年份 Year | Moran’s I |
| 注:*表示在5%水平下显著。 |
| Note: *indicate significance at the 5% levels. |
| 2004 | 0.254* | 2011 | 0.359* | 2018 | 0.505* |
| 2005 | 0.284* | 2012 | 0.434* | 2019 | 0.531* |
| 2006 | 0.258* | 2013 | 0.475* | 2020 | 0.482* |
| 2007 | 0.255* | 2014 | 0.495* | 2021 | 0.615* |
| 2008 | 0.286* | 2015 | 0.480* | 2022 | 0.595* |
| 2009 | 0.324* | 2016 | 0.545* | 2023 | 0.640* |
| 2010 | 0.337* | 2017 | 0.695* | | |
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Comparison of the fitting performance of each machine learning models
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| 模型 Model | 验证集 Validation set | | 测试集 Test set |
| MAE | RMSE | R2 | | MAE | RMSE | R2 |
| SVM | 0.824 | 1.399 | 0.888 | | 0.934 | 1.478 | 0.876 |
| RF | 0.849 | 1.235 | 0.913 | | 1.148 | 1.563 | 0.861 |
| XGBoost | 0.150 | 0.218 | 0.997 | | 0.745 | 1.062 | 0.936 |
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不同机器学习模型的拟合效果比较
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| 模型 Model | 验证集 Validation set | | 测试集 Test set |
| MAE | RMSE | R2 | | MAE | RMSE | R2 |
| SVM | 0.824 | 1.399 | 0.888 | | 0.934 | 1.478 | 0.876 |
| RF | 0.849 | 1.235 | 0.913 | | 1.148 | 1.563 | 0.861 |
| XGBoost | 0.150 | 0.218 | 0.997 | | 0.745 | 1.062 | 0.936 |
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