Eco-efficiency and zoning of cultivated land use in three northeast provinces from perspective of low carbon
[Objective]The research on ecological efficiency and zoning of cultivated land use from the perspective of low carbon is of great significance to the low carbon utilization of regional cultivated land and the adjustment of land use structure,and is an important measure to form the'trinity'protection pattern of cultivated land quantity,quality and ecology,and promote the construction of cultivated land ecologi-cal civilization.[Method]In the present study,the ecological efficiency index system of cultivated land use was constructed in the view of low carbon,and the spatial-temporal differentiation characteristics of the eco-efficiency of cultivated land use in the study area were revealed u-sing the super-efficiency SBM(Super slacks-based measure)model and ArcGIS software.The ecological zoning of cultivated land use was conducted using the two-dimensional graphic clustering method,and the direction of each zoning was proposed.[Result](i)In 2010-2020,the eco-efficiency of cultivated land use in the study area fluctuated and decreased,and the peak of nuclear density showed the distri-bution characteristics of'bipeak-unipeak-bipeak',and the main peak changed from'broad peak'to'sharp peak'.The polarization char-acteristics were obvious,and the regional differences gradually eased.(ii)The low efficiency wave peak changed from'double peak'to'single peak',and the polarization of eco-efficiency tended to improve;The wave peak of medium efficiency was a double peak form of'one main peak and one small peak',and the ecological efficiency displayed the phenomenon of polarization and regional aggregation.The main peak height of high-efficiency decreased,and the internal difference of eco-efficiency gradually decreased.(iii)The ecological efficiency of cultivated land use had agglomeration effect,forming a spatial distribution pattern of high in the north and low in the south.The hot spot area expanded to the south,and the cold spot area moved around the southwest,presenting a trend of'contraction-expansion-contraction'.(iv)Finally,the cultivated land use was suggested to divide into four ecological zones:pilot zone,balanced zone,complementary zone and up-grading zone,and regional differentiated low-carbon use measures were formulated.[Conclusion]The research results are conducive to the low-carbon utilization of cultivated land and the optimization of land layout in the three northeastern provinces,so as to provide a theoretical reference for realizing sustainable utilization of cultivated land and promoting the construction of cultivated land ecological civilization.
Cultivated land use eco-efficiencySubzoneLow carbonSuper-efficiency SBM modelTwo-dimensional graphic clusterThree northeast provinces
NETL
NSTL
万方数据
