摘要
为系统考察中国粮食主产区耕地利用效率的分布特征。该研究将耕地利用碳排放作为非期望产出纳入耕地利用效率的测度框架中,以中国粮食主产区2000—2016年数据为支撑,综合运用SBM-Undesirable模型和核密度估计方法对粮食主产区耕地利用效率的空间格局及演进特征进行定量刻画。结果表明:1)粮食主产区整体和各省份耕地利用碳排放都表现出不同幅度的增长态势,其中河南的绝对增长量最大,由2000年的487.40万t变化至2016年的806.99万t,净增长319.59万t,其次是内蒙古和黑龙江,江西的绝对增长量最低,研究期内共增长了59.64万t;2)考虑碳排放后,粮食主产区整体和各省份耕地利用效率明显降低,2000年和2016年,不考虑耕地利用碳排放时,粮食主产区平均耕地利用效率分别为0.774 4和0.917 9,而考虑碳排放后,平均效率指数分别为0.639 4和0.843 8;3)粮食主产区耕地利用效率表现出明显的区域差异,根据SBM-Undesirable模型测度结果可将13个粮食主产区分为耕地利用效率优势区、平缓区和劣势区3种类型;4)从核密度估计结果来看,粮食主产区整体和不同类型区耕地利用效率都表现出明显的偏态分布及不同程度的极化特征,而且,与2000年相比,粮食主产区整体、平缓区和劣势区2016年密度曲线的变化区间明显变小,表明耕地利用效率的地区差距有所缓解,但优势区的区间变化幅度并不明显。该研究可以为粮食主产区耕地资源高效、低碳利用提供科学依据和决策参考。
To systematically investigate the spatial-temporal distribution characteristics of cultivated land use efficiency in major grain producing areas of China from low carbon perspective, this study took carbon emissions resulting from cultivated land utilization, which acted as an undesirable output, into the measurement framework of cultivated land use efficiency, and quantitatively analyzed the spatial pattern and evolution of cultivated land use efficiency in major grain producing areas from 2000 to 2016. Methods applied in this study include SBM-Undesirable model and kernel density estimation. The results showed that： 1） Carbon emissions resulting from cultivated land utilization in the main grain producing areas and each province all showed upward trend at different rates. The absolute growth of carbon emissions from cultivated land utilization in Henan Province ranked the first, whose carbon emissions changed from 487.40×104 to 806.99×104 t during the period of from 2000 to 2016, with a net increase of 319.59×104 t. Carbon emissions resulting from cultivated land utilization in Inner Mongolia and Heilongjiang ranked the second and third, respectively. The absolute growth of carbon emissions resulting from cultivated land utilization in Jiangxi Province ranked the lowest, with a total increase of 59.64×104 t during the study period. 2） Cultivated land use efficiency of the major grain producing areas and provinces was reduced significantly when the carbon emissions resulting from cultivated land utilization were taken into account. In the year of 2000 and 2016, the average values of cultivated land use efficiency in major grain producing areas measured by the traditional CCR model were 0.7744 and 0.9179, respectively, while the average efficiency measured by SBM-Undesirable model was 0.6394 in 2000 and 0.8438 in 2016. 3） Cultivated land use efficiency in major grain producing areas showed characteristics with significant spatial disparities. As can be seen from the results calculated by SBM-Undesirab
作者
匡兵
卢新海
韩璟
张祚
Kuang Bing;Lu Xinhai;Han Jing;Zhang Zuo(College of Public Administration,Huazhong University of Science and Technology,Wuhan 430074,China;College of Public Administration,Central China Normal University,Wuhan 430079,China)
出处
《农业工程学报》
EI
CAS
CSCD
北大核心
2018年第11期1-8,共8页
Transactions of the Chinese Society of Agricultural Engineering
基金
国家自然科学基金面上项目(71673096
41501589
71774066)
国家社会科学基金(17CGL029)
关键词
土地利用
碳排放
粮食主产区
耕地利用效率
差异
演进
land use
carbon emissions
major grain producing areas
cultivated land use efficiency
difference
evolution
