中国种植业碳补偿率测算及空间收敛性.

It is of great significance to analyze the net carbon effect of planting industry - as it could provide theoretical basis for lowcarbon development. By considering the dual carbon effects of planting industry, this paper defined the ratio of absorption to emission as carbon compensating rate, and constructed a list to assess the carbon effect of planting industry, which consisted of agricultural input, rice field methane, straw treatment and crop carbon sequestration. Then, this paper estimated the carbon compensating rate of planting industry in China from 2000 to 2018. Besides, the evolution and distribution of the rate were explored, and the convergence of regional differences was analyzed based on the spatial econometric model. The results were：① The carbon compensating rate of planting industry in China was averagely 0.855, whose net effect presented as a carbon source. In addition, the compensating rate was 0.761, 0.852 and 1, 117 in the eastern, central and western regions respectively, indicating that the planting industry exhibited to be carbon sources in the eastern and central regions, while it showed to be a carbon sink in the western region. In the structure of emissions, straw treatment accounted for the highest (47,751%) - and rice paddies made up for the lowest (7. 518%).② Based on the provincial distribution of carbon compensation rate in major years, the planting industry in China was transiting from a carbon source to a carbon sink. There were nine provinces showing to be carbon sinks, such as Qinghai, Xinjiang and Heilongjiang, while 18 provinces presented to be carbon sources, including Fujian, Hunan, Jiangxi, etc. Besides, the planting industry in Ningxia, Sichuan and Guangxi had transformed from carbon sources to carbon sinks. (3) The cr convergence was not found in the whole country or the three regions - while all the regions formed their own conditional p convergence clubs. The carbon effect of the planting industry was spatially related, which endowed a positive spillover effect to the convergence of neighboring provinces, showing a positive evolution characteristic of mutual promotion. Based on the conclusions above, this study suggests that policymakers should implement carbon emission mitigation from specific sources, formulate different mitigation policies by targeting regions and strengthen inter-provincial cooperation, so as to provide a theoretical basis for the coordination of the relationship between crop production and the ecological environment. [ABSTRACT FROM AUTHOR]