By integrated application of SD feedback dynamic complexity analysis method and agricultural engineering,environment engineering and other disciplines we exploited thePig-biogas-energycircular engineerings in the base and created theAnaerobic digester effluent third class filter delay storage and diffluence from the irrigating water engineeringengineering.After having proved thatthere still has serious pollutionwith SD delay function theory,we established five new breeding and planting biology chains circul...