基于净碳汇的农业生态效率测度、时空演进及收敛性研究——以贵州78个县域为例
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贵州财经大学大数据应用与经济学院

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贵州省科技计划项目(黔科合基础-ZK[2021]一般197)


Measurement, spatial-temporal evolution, and convergence of agricultural eco-efficiency based on net carbon sink: A case study of 78 counties in Guizhou
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Guizhou University of Finance and Economics

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Guizhou Provincial Science and Technology Projects (QKHJC-ZK[2021]YB197)

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    摘要:

    本文借助2015—2020年贵州省78个县域面板数据,将农业净碳汇纳入期望产出,采用基于SBM方向性距离函数的Malmquist-Luenberger指数测度农业生态效率,综合运用Dagum基尼系数分解法、Kernel密度估计法和β收敛模型系统分析贵州农业生态效率的时空演变特征。研究发现:贵州全省及五大区域农业生态效率总体呈波动上升趋势;各区域内差异均呈现扩大趋势,说明各区域内部不同县域农业生态效率不均衡问题日益突出;五大区域间差异总体呈扩大趋势,说明不同区域的农业生态效率逐渐失衡;对差异进行分解发现区域间差异已大于超变密度,成为差异主要贡献来源。贵州全省及五大区域核密度分布曲线在观测期内均存在右移趋势,且存在不同程度的极化趋势。全省及五大区域基本支持绝对β收敛,考虑差异化影响因素之后,不同区域农业生态效率会逐渐收敛至各自稳态水平。

    Abstract:

    Based on a panel data of 78 counties in Guizhou from 2015 to 2020, this paper incorporates agricultural net carbon sink into expected output, uses the Malmquist-Luenberger index based on the SBM directional distance function to measure the agricultural eco-efficiency, and comprehensively applies the Dagum Gini coefficient decomposition method, kernel density estimation method, and β-convergence model to systematically analyze the spatial-temporal evolution characteristics of agricultural eco-efficiency in Guizhou. This study finds that the agricultural eco-efficiency of Guizhou and its five regions showed a fluctuating and increasing trend. The intra-reginal differences of each region showed an expanding trend, indicating that the imbalance of agricultural eco-efficiency in different counties within each region has become increasingly prominent. The inter-regional differences of the five regions showed a generally expanding trend, indicating that the agricultural eco-efficiency in different regions was gradually unbalanced. By decomposing the differences this paper also finds that he inter-regional differences had exceeded the intensity of trans-variation, which became the main source of differences. The kernel density distribution curves of Guizhou and its five regions showed a rightward trend during the observation period with different degrees of polarization trends. The whole province and the five regions basically supported absolute β-convergence, and after considering the different influencing factors, the agricultural eco-efficiency in different regions will gradually converge to their own steady-state level.

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李晓龙,袁帅强,王伟. 基于净碳汇的农业生态效率测度、时空演进及收敛性研究——以贵州78个县域为例[J]. 农业现代化研究, 2023, 44(4): 680-691
LI Xiao-long, YUAN Shuai-qiang, WANG Wei. Measurement, spatial-temporal evolution, and convergence of agricultural eco-efficiency based on net carbon sink: A case study of 78 counties in Guizhou[J]. Research of Agricultural Modernization, 2023, 44(4): 680-691

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  • 收稿日期:2023-01-10
  • 最后修改日期:2023-06-20
  • 录用日期:2023-06-21
  • 在线发布日期: 2023-09-18
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