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第5 期 李继霞 等：“双碳”目标下中国耕地利用生态效率的区域差异、动态演进及收敛性 181

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Regional Differences Dynamic Evolution and Convergence of

Ecological Efficiency of Cultivated Land Use in China
Under the Dual Carbon Target

LI Jixia， WANG Huachun， FAN Chenglin

Abstract Scientific measurement and analysis of the ecological efficiency of cultivated land use in
China under the “dual carbon” target have important reference value for achieving the sustainable use of
cultivated land， and the high-quality development of agriculture and rural areas. Taking the connotation
of ecological efficiency of cultivated land use as the starting point，this paper constructs an evaluation in‐
dex system for ecological efficiency of cultivated land use in China from the perspectives of carbon se‐
questration， carbon emissions， and non-point source pollution. In addition，this paper analyzes the
temporal-spatial differentiation， regional differences， dynamic evolution， and convergence of ecological
efficiency of cultivated land use in China from 2001 to 2020 using methods such as the mixed super effi‐
ciency SBM-DEA model， Dagum Gini coefficient， Kernel density estimation， and spatial convergence
model， which include unexpected outputs. The results are as follows： ①The ecological efficiency of cul‐
tivated land utilization at the provincial level in China was relatively high， but showed a downward trend.
The ecological efficiency of cultivated land utilization in the three major grain functional areas showed a
regional distribution pattern in which the efficiency inmain grain sales area is higher than that of the
grain production and marketing balance area which in turn is higher than that of main grain production
area. ② Inter-regional differences and intra-regional differences are the main sources of regional differ‐
ences in the ecological efficiency of cultivated land use in China. The Gini coefficient in the main grain
producing areas and grain production and marketing balance areas is higher than the overall Gini coeffi‐
cient in the country. ③ Except for the main grain producing areas， there is a certain degree of polariza‐
tion or multi-level differentiation in the ecological efficiency of cultivated land use in the whole country
and other grain functional areas. ④ In addition to the divergence characteristics in the main grain produc‐
tion areas， there are different degrees of σ convergence， absolute β convergence and conditional β conver‐
gence in the whole country，even in the main grain sales areas and the grain production and marketing bal‐
ance areas. In addition， the level of economic development， scientific and technological progress and ur‐
banization rate and other factors have significant heterogeneity in their impact on the ecological efficiency
of cultivated land use in different grain functional areas.
Key words dual carbon target； cultivated land utilization； ecological efficiency； regional differ‐
ences； dynamic evolution； convergence

(责任编辑：金会平)