Abstract: Emergy analysis was used to compare the resource utilization, product production, environmental stress, and sustainability of two agro-economic systems in Chaoyang (an agricultural base) and Fushun (an industrial base) of Liaoning Province over past 25 years. The results demonstrated that during the production process in the two systems, the dependence on purchased resources was increasing, and, because of the higher dependence on the purchased nonrenewable resources, a heavier load was produced on the environment. During the past 25 years, the ecological sustainability of the two systems decreased dramatically. In Chaoyang, the sustainability had a more rapid decrease, with its sustainability index being decreased from 1.25 to 0.11. The same process of industrialization of Chaoyang as Fushun brought more stress to its weaker environment. Environmental protection and restoration rather than greater amount of purchased non-renewable resources should be a good strategy to reduce the loss of non-renewable indigenous resources in two bases.

Key words: Earthworm feces, Systemic induction resistance, Polyphenol oxidase, Peroxidase, Phenylalanine ammonia-lyase, Anthracnose