| In order to actively respond to climate change,China has proposed its own goal of "carbon peak and carbon neutrality".In 1998,China recognized the importance of forest resources due to a major flood,and therefore proposed a Natural Forest Protection Project,the "NFPP".After 20 years of conservation,the results of the project are obvious.However,with the completion of the second phase of the NFPP,the next step of natural forest protection and forest carbon sink development has become the focus.As the main force of forest carbon sinks,natural forests,and the NFPP area,the main production area of China’s forest carbon sinks,need to take up this responsibility.In order to promote the further growth of forest carbon sinks forest carbon sink development,this study tries to study the evolution of forest carbon sink efficiency in the area since the implementation of the NFPP,and analyze its influencing factors,so as to provide reference for forest carbon sink development by improving carbon sink efficiency,and provide some reference for the choice of focus on further protection and development of forests in the NFPP area,which has certain theoretical and practical significance.Firstly,this article reviews literature on forest carbon sequestration efficiency both domestically and internationally,and studies theoretical knowledge such as forest carbon sequestration and forest carbon sequestration efficiency.Secondly,the development status of forest carbon sink in China’s NFPP area and the region is simply sorted out.On this basis,the forest area,the completion amount of forestry fixed investment,the number of employees in the forestry system,and the rate of forestry pest control are selected as input indicators;Select the forest carbon sink calculated by the biomass expansion method as the output indicator.Using the DEA Malmquist model,a systematic study was conducted on the evolution of forest carbon sink efficiency in 16 provinces(cities,districts)within China’s natural protection project area from static and dynamic aspects during the sixth to ninth forest resource inventory(1999-2018)in the sample area.Using the DEA model to calculate the forest carbon sink efficiency value of the NFPP II project(2010-2020)as the dependent variable,combined with theoretical research to select 7 influencing factors under different indicators,empirical research was conducted using the Tobit model to obtain the overall impact effect and differences of forest carbon sink efficiency between the NFPP area and each partition.The results of the study show that in terms of static efficiency,the overall forest carbon sink in the NFPP area is at an ineffective medium level.Only Jilin,Sichuan and Yunnan in the region have reached DEA effective forest carbon sink efficiency,and most of the regions have ineffective forest carbon sink efficiency under the limitation of scale efficiency.The differences among the three NFPP sub-regions are obvious,and the overall carbon sink efficiency of the key state-owned forest area and the upper Yangtze River area is significantly higher than that of the middle and upper Yellow River area.From the dynamic analysis,the increase of forest carbon sink efficiency in the NFPP area is getting bigger and bigger,and the technical efficiency index and technical progress index keep progressing,from pure technical progress to double promotion with technical efficiency,and the total factor production efficiency in a few areas shows a decreasing trend.The above issues all limit the further development of forest carbon sinks: insufficient scale efficiency increases the cost of forest carbon sink development,the level of forestry management cannot guarantee the supervision of forest carbon sink development,low technical efficiency increases the difficulty of forest carbon sink development,weak technological innovation limits the benefits of forest carbon sink development,and regional efficiency differences hinder forest carbon sink development planning.From the results of Tobit model,forest cover,forest disaster area,forestry fixed investment amount,total forestry output value,and forestry control rate have a negative influence on the overall forest carbon sink efficiency in the NFPP area.The amount of forest harvesting,urbanization rate,and number of forestry system units positively contribute to the overall forest carbon sink efficiency in the NFPP area.From the perspective of the NFPP sub-regions,the effect and significance of different indicators exhibited by different sub-regions differed.Combined with the results of efficiency analysis,it is believed that the problems of forest carbon sink development in the area mainly come from unreasonable forest structure,low forest management and protection level,lack of forestry funds,backward forestry technology,and imperfect policies,regulations,and systems related to carbon sink development.Based on the above research,combined with the overall and regional conditions of the NFPP area,and taking into account the problems and causes of forest carbon sink development,targeted adjustments are proposed to the forest management structure,strengthen the foundation of carbon sink development,deepen industrial transformation and management,provide guarantees for carbon sink development,improve the carbon trading market,stimulate forest carbon sink development,promote forestry technology innovation,reduce the difficulty of carbon sink development,and improve relevant laws and regulations,optimize the carbon sink development environment and other countermeasures and suggestions,so as to help each natural conservation project zone improve the efficiency of forest carbon sink,further develop forest carbon sink,and accelerate the pace of achieving the goal of "carbon neutrality". |
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