Abstract: Heavy industrial regions are facing great challenges in excessive resource consumption and plenty of pollutant emission. How to balance ecological protection and economic development has attracted more and more attention. Taking Liaoning Province in 2017 as an example, emergy analysis was used to calculate natural capital stocks, ecosystem service values, resource consumption including environmental services and ecological economic losses due to large industrial pollutants discharged for heavy industrial region, and evaluate green and ecological integration development. The results showed that: (1) the total natural capital stock was 5.46E+25 sej, equivalent to emergy monetary value of 1.54E+13 Em$. Geological asset had the largest contribution, accounting for 48.90%; (2) the emergy monetary value of ecosystem services was 3.27E+11 Em$ and the corresponding market price was 5.80E+10 $. The emergy monetary values of aquatic products, mineral mining, and fossil fuel mining were much higher than their market prices; (3) the total amount of resource consumption was 1.54E+24 sej, including renewable resources (3.28E+21sej), nonrenewable resources (4.99E+23sej), and input resources (1.03E+24sej), indicating that economic growth in Liaoning mainly depended on local nonrenewable resources and input resources; (4) environmental services were 9.85E+21 sej, which was 1.73 times higher than ecosystem regulating services; ecological economic losses caused by industrial pollutants were 1.84E+22sej, indicating that pollutant emissions from economic activities inevitably caused ecological overload and ecological economic losses and that input of massive resources and energy are needed for artificial purification; (5) Based on the traditional emergy accounting method, environmental services and ecological economic loss, the emergy yield rate, environmental loading rate, and emergy sustainability index were 1.47, 476 and 0.0031 respectively, indicating that Liaoning was under great pressure on ecological and environmental protection, and that its economic development highly depended on local natural resources and ecological systems. It was in state of unsustainable development. There is still a certain gap with good green ecological integration development.

Key words: natural capital, ecosystem services, eco-economic performance index, old industrial base, Liaoning Province.