The structure and functions of a compound agro-ecosystem for utilization of the uncultivated land in the suburb of Tianjin

Uncultivated land is a waste of valuable agricultural resources,especially in the suburbs. In order to fully utilization of the waste land in Tianjin suburb,a compound agro-ecosystem was built based on eco-engineering at the test plot.The system is a feature of "fruit fish-domestic animal-domestic bird". The structure and functions of this system were analysed to provide ways for exploiting the abundant waste land in suburbs.