The Input-output Efficiency of Afforestation for Carbon Sink in Mountainous Regions in Yunnan Province—Empirical Analysis of Rural Households in Tengchong City Based on DEA-Tobit Model
⑴Background——Forest is an important carbon sink resource,and afforestation is an effective means to increase carbon absorption and rebuild carbon balance.Forestry carbon sink realizes the marketization of forest ecological value,and provides a new way to exert forest ecological and economic benefits.However,how to verify the concrete results of forestry carbon sink projects and how to measure the multiple benefits of carbon sink forests are realistic problems that need to be focused on and answered in the development of forestry carbon sink.At present,the research on forestry input-output efficiency mainly focuses on two aspects,one is the measurement of efficiency,the other is the exploration of the influencing factors of efficiency value,but there is still a lack of re-search on the input-output efficiency of rural households engaged in forestry carbon sink activities.⑵ Methods——The research data came from the research group's investigation in three towns of Teng-chong City,Yunnan Province in April 2023,and a total of 380 valid questionnaires were obtained.The research objects were the rural households who participated in small-scale afforestation and reforestation projects in Teng-chong City.Firstly,this paper constructed the evaluation indicator system of input-output.Then,the first stage BCC-DEA model was used to measure the input-output efficiency.In the second stage,the effects of environ-mental variables and random factors were assessed.In the third stage,the input-output efficiency was re-meas-ured using adjusted input indicators.Finally,the key factors affecting input-output efficiency were discussed by using Tobit model.⑶ Results——The production and management of carbon sink forestry of the rural households in Teng-chong City is in the stage of increasing returns to scale,and the efficiency value of input-output is 0.598.Low pure technical efficiency is the key factor restricting the improvement of production efficiency.There are signifi-cant differences in production efficiency between different regions.Forestry subsidy policy has a significant posi-tive impact on the production efficiency of carbon sink forestry,and the degree of forestland fragmentation and logging quota application also have a positive impact on the production efficiency of carbon sink forestry.Howev-er,market distance and seedling price have negative effects on input-output efficiency.⑷ Conclusions and Discussions——Based on the above research conclusions,the following policy sug-gestions are put forward:First,expand the advantages of economies of scale and improve the efficiency of re-source utilization.Optimize the policies of forestland transfer and encourage non-forest farmers to transfer trees and contractual management rights of forestland.Second,coordinate the structure of production factors and real-ize the reasonable allocation of resources.The forest farm or village collective should provide systematic training and publicity to forest farmers,improve their project management level and related technologies,as well as the awareness of forestry carbon sink.Third,strengthen policy support to ensure the effective implementation of sub-sidies.Government departments should increase financial transfer payments to rural households in areas where forestry carbon sink projects are implemented,and increase the proportion of forestry transfer payments in their total household income.
mountainous regionsafforestation for carbon sinkinput-output efficiencyDEA-Tobit modelYun-nan Province
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