"双碳"目标下高标准农田建设的农业碳减排效应OA

Under the"dual carbon"goals,carbon sequestration and emission reduction in agricultural systems have become pivotal to achieving green development.High-standard farmland construction is a powerful means of enhancing China's national food security and an effective way to reduce agricultural carbon emissions.Based on panel data of agricultural carbon emissions and high-standard farm‐land construction in 13 prefecture-level cities(autonomous prefecture)and 3 county-level cities under provincial jurisdiction in Hubei Province(hereinafter referred to as the"16 prefecture-level cities")from 2014 to 2022,this study adopted a two-way fixed effects model to explore the agricultural carbon emission reduction effect of high-standard farmland construction and its underlying mechanisms.The results showed that:① The 16 prefecture-level cities of Hubei Province achieved significant results in agricultural carbon emission re‐duction,with agricultural carbon emissions having a downward trend and the reduction rate of some regions reaching 20%.② Bench‐mark regression results showed that the inhibitory effect of high-standard farmland construction on agricultural carbon emissions was significant at the 1%level,indicating that it effectively reduced agricultural carbon emissions.After replacing the explanatory vari‐ables,applying two-sided winsorization,conducting a one-period lag of analysis,and adding control variables,the carbon emission re‐duction effect of high-standard farmland construction remained significant.③ Mediation effect analysis revealed that high-standard farmland construction had a significant negative impact on agricultural inputs and significantly promoted the development of agricultur‐al socialization services.Meanwhile,the incremental effect of agricultural inputs on agricultural carbon emissions was significant at the 1%level,and the decremental effect of agricultural socialized services on agricultural carbon emissions was also significant at the 5%level.This indicated that reducing agricultural inputs and promoting the sustainable development of agricultural socialized services were the underlying mechanisms by which high-standard farmland construction suppressed agricultural carbon emissions.④ Heteroge‐neity analysis found that the carbon emission reduction effect of high-standard farmland construction was significant in hilly areas but not in plain areas.In addition,the larger the scale of high-standard farmland construction,the more pronounced its agricultural carbon emission reduction effect.Based on these findings,this study recommends establishing a long-term mechanism for high-standard farm‐land construction;enhancing the technical support system of agricultural socialized services;implementing regionally differentiated high-standard farmland construction strategies;and formulating financial subsidy policies for agricultural carbon emission reduction to sustain agricultural carbon emission cuts.