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陕西省耕地碳收支时空变化及公平性

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[目的]探讨区域农业生产碳收支和碳排放公平性的时空演变规律,为制定差异化减排增汇对策提供科学参考。[方法]基于2000-2020年陕西省农业统计数据,采用碳排放系数法对全省连续21 a的耕地碳收支进行估算,并构建碳排放公平性评价模型,从生态承载系数及经济效率系数两个方面分析陕西省耕地碳排放公平性。[结果]①21 a间,陕西省耕地碳排放总量先增后减,碳排放强度增幅达到48。15%,其中化肥是主要的碳排放源。②碳吸收总量持续上升,碳吸收强度年平均增长率13。67%,其中蔬菜的碳吸收贡献率最高。③碳排放和碳吸收均呈现关中高、陕南陕北较低的分布格局,耕地碳排放生态承载能力表现为:陕南>关中>陕北,农业经济效率呈现:陕南>陕北>关中;碳排放公平性聚类分析结果显示,陕南和西安市在一定程度上分担了陕西省其他地区的耕地碳减排压力,而铜川市、宝鸡市、榆林市、渭南市等地区则加重了耕地碳减排压力。[结论]陕西省耕地碳收支动态和公平性区域差异较大,需要针对不同区域情况制定和完善差异化减排策略。
Spatiotemporal Variation and Fairness of Cultivated Land Carbon Budget in Shaanxi Province
[Objective]The temporal and spatial evolution patterns of regional agricultural carbon budgets and carbon emission fairness were investigated,in order to provide scientific references for formulating differentiated emission reduction and carbon sequestration strategies.[Methods]Based on the agricultural statistical data of Shaanxi Province from 2000 to 2020,this study estimated the carbon budget of cultivated land in the province for 21 consecutive years using the carbon emission coefficient method.A carbon emission fairness evaluation model was constructed to analyze the carbon-emission fairness of cultivated land in Shaanxi Province from two aspects:ecological carrying capacity and economic efficiency coefficient.[Results]① The total carbon emission of cultivated land in Shaanxi Province increased first and then decreased during 2000-2020,and the carbon emission intensity increased by 48.15%,with chemical fertilizers as the main source of carbon emissions.② The total carbon absorption continued to rise,with an average annual growth rate of carbon absorption intensity of 13.67%,in which vegetables having the highest contribution to carbon absorption.③ Both carbon emissions and carbon absorption showed a high distribution pattern in Central Shaanxi Province and a low one in Northern and Southern Shaanxi,with the ecological carrying capacity of cultivated land carbon emissions being Southern Shaanxi>Central Shaanxi>Northern Shaanxi and the agricultural economic efficiency being Southern Shaanxi>Northern Shaanxi>Central Shaanxi.The results of carbon emission fairness cluster analysis showed that Southern Shaanxi and Xi'an shared the pressure of carbon emission reduction of cultivated land for other regions of Shaanxi Province to a certain extent,while Tongchuan City,Baoji City,Yulin City,and Weinan City regions increased the pressure of carbon emission reduction of cultivated land.[Conclusion]The dynamics and fairness of cultivated land carbon budget in Shaanxi Province vary greatly among different regions;thus,differentiated emission reduction strategies should be developed and improved according to different regional conditions.

cultivated landcarbon absorptioncarbon emissionscarbon budgetShaanxi Provincefairness

马超群、张莎莎、韩玲、员学锋、任朝霞、弋志强、张硕蒙

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长安大学土地工程学院,陕西西安 710054

陕西省土地整治重点实验室,陕西西安 710054

耕地 碳吸收 碳排放 碳收支 陕西省 公平性

2024

水土保持通报
中国科学院水利部水土保持研究所 水利部水土保持监测中心

水土保持通报

CSTPCD北大核心
影响因子:0.658
ISSN:1000-288X
年,卷(期):2024.44(6)