| Langxi Town,Yinjiang County is a typical trough-type karst small waters-hed with a valley area of 167 km~2,of which the karst area is 153.67 km~2.T-he rocky desertification phenomenon is serious and the ecosystem is extremely fragile,which seriously restricts the local economic development.Level and pe-ople's living standards.According to the general arrangement and deployment of the“Grade of Rocky Desertification Comprehensive Management in Karst Region(2006-2015)”and the“13th Five-Year Plan for the Comprehensive M-anagement of Rocky Desertification in Karst Areas(2016-2020),Under the tec-hnical guidance of the local government and relevant scientific research institut-ions,Langxi Town began to implement a series of ecological treatment projects in combination with the local conditions:carrying out the land enhancement measures,constructing the water diversion and storage infrastructure,and adjus-ting the agricultural planting according to the rectified production conditions.S-tructure,vigorously develop the ecological industry based on fruit industry,tea industry and aquaculture industry.In order to scientifically evaluate the input and output of various ecological industries in Langxi Town and the comprehen-sive benefits of rock desertification ecological management in Langxi Town,th-is study uses Langxi Town's fruit industry subsystem,aquaculture subsystem,e-cological tea industry subsystem and compound The agro-ecological economic system is the research object,and the Hexi Village,Xipu Village,Sancun Vill-age and Ganlong Village of Langxi Town are selected as representative areas,in 2007(the first year of the first comprehensive treatment of rocky desertifi-cation)and 2015(The last year of the first phase of comprehensive evaluation of rocky desertification)is the research period,using energy theory and meth-ods to analyze the changes in the input and output of the eco-economic syste-m before and after the implementation of various ecological industries in the s-tudy area and the implementation of the rocky desertification control project.The economic and ecological aspects of the evaluation of the energy value in-dex evaluation system,comprehensive evaluation of the ecological management benefits of the study area,the main conclusions are:(1)The total input energy value of Longxi Town's fruit industry subsystem in 2015 was 3.06E+19sej;the output energy value was 4.77E+19sej;the syst-em renewable rate was 81.84%,the energy output rate was 3.05,and the envi-ronmental load rate was 0.22.In addition,the economic performance of the fr-uit industry represented by Xipu Village is high.It shows that the Longxi To-wn Economics Subsystem is highly efficient in use of renewable resources,has a small load on the ecological environment,and has a large output.The indu-stry is an environmentally friendly ecological industry with high economic retu-rns.(2)The total input energy value of the agro-industrial subsystem of Lan-gxi Town in 2015 was 2.53E+18sej;the output energy value was 7.41E+18sej;the system renewable rate was 78.86%,the energy output rate was 3.02,and the environmental load rate was 0.27..In addition,the aquaculture units repre-sented by Sancun Village have high economic benefits.It shows that the oper-ation of the aquaculture subsystem of Langxi Town mainly relies on the labor force,the pressure on the ecological environment is small,and the output is large.The industry is an ecological industry with high economic benefits but low level of modernization.(3)The total input energy value of Longxi Town Ecological Tea Industry Subsystem in 2015 is 1.67E+19sej;the output energy value is 2.70E+18sej;the system renewable rate is 84.43%,the energy output rate is 1.07,and the env-ironmental load rate is 0.18.In addition,the ecological tea industry represented by Ganlong Village has high economic benefits.It shows that the operation of the ecological tea industry subsystem of Langxi Town mainly relies on the labor force,and the pressure on the ecological environment is extremely small.Compared with the tea gardens in other regions,the output is relatively high.The industry is a sustainable development with great development potential and high ecological benefits.industry.(4)Among the three subsystems of the fruit industry,aquaculture industry and ecological tea industry in Langxi Town,combined with the energy value analysis and economic benefit analysis results,the ecological and economic be-nefits of the fruit industry and the ecological tea industry are higher.High ren-ewability,sustainability,and the most productive advantage.Although the aqua-culture industry has a high output rate and low pressure on the ecological env-ironment,the economic investment to maintain the industrial operation is relati-vely high.Therefore,the scale of the aquaculture industry should be reasonably controlled to prevent blind expansion of the scale of farming and bring econ-omic pressure and risks to local farmers.(5)In terms of social benefits,the per capita energy value and energy de-nsity of the compound agricultural eco-economic system in Langxi Town have been improved,indicating that the living standards of the people in Langxi To-wn have been improved to a certain extent and the social development level has increased.In terms of economic benefits,the monetary value of the energy value of the compound agricultural eco-economic system in Langxi Town has increased,but the net energy output rate has not changed,indicating that the economic value of various characteristic agricultural products in Langxi Town has been improved,but the economic benefits.There is no major improvement for the time being.In terms of ecological benefits,the environmental load ra-te and energy value investment rate of the compound agricultural eco-economic system in Langxi Town have been improved,and the sustainable development index has declined slightly,indicating the dependence of some industries in Langxi Town on the ecological environment.Larger,the application of pesticid-es and fertilizers has increased the pressure on the local ecological environment,but it still has high vitality and development potential. |
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