Dynamic evaluation of agricultural eco-economic system in Guangxi

【Objective】 The operating efficiency and sustainable development status of agricultural eco-economic system in Guangxi were evaluated dynamically, to provide countermeasures and suggestions for the sustainable development of agriculture in Guangxi.【Method】 Used emergy analysis theories and methods, 33 indicators were established from three aspects:emergy input, emergy output, and system evaluation, to in-depth study the emergy input, output and system operation status of Guangxi's agricultural eco-economic system from 2000 to 2019, and calculate the agricultural green GDP. Compared the research results of Guangxi with the national average level and Guizhou, Yunnan.【Result】 From 2000 to 2019, the total input emergy and total output emergy of Guangxi's agricultural eco-economic system increased by 9.54% and 44.61% respectively. The insufficient auxiliary emergy input restricted the efficiency of agricultural resource development and utilization. Agriculture was in a traditional development stage that was highly dependent on natural resources and labor-intensive, and characteristic and advantageous industries were not prominent. Although the system was in a state of sustainable development, it was not stable enough. Especially since 2015, the sustainability index had dropped by 38.85%, indicating that the system was still facing great environmental pressure. The per capita emergy consumption and emergy density were low, which restricted farmers' living standards and agricultural economic development. The proportion of agricultural green GDP was relatively low, and it had gradually decreased from 60.13% in 2000 to 47.73% in 2019.The sustainability index of Guangxi's agricultural eco-economic system was higher than the national average and Guizhou, but lower than Yunnan;the proportion of agricultural green GDP was higher than the national average, but lower than Guizhou and Yunnan.【Suggestion】 By improving the quality of agricultural labor, increasing investment in agricultural machinery and technology, developing ecological circular agriculture, optimize the structure of emergy input, improve the efficiency of agricultural resource development and utilization, and maintain the sustainable development of the agricultural eco-economic system. Making full use of forest and marine resources, to create characteristic leisure agriculture, forest eco-tourism and marine farms and pastures, and realize the value of agricultural ecological products.