Integrated Myco-Aquatic Polyculture for Northern Latitudes: A Systems Design Framework Combining Mycocultural Cylinder Production, Rice-Fish-Duck Polyculture, and Azolla Nitrogen Fixation for Closed-Loop Food Production in Canadian Climate Conditions

This preprint presents a systems design framework integrating three independently documented food production systems — mycocultural cylinder cultivation, rice-fish-duck polyculture, and Azolla nitrogen management — as a unified closed-loop food production architecture adapted to Canadian temperate climate conditions. The integration framework characterises shared substrate and waste stream cycling, nutrient balance across all components, and cold-climate adaptation requirements for each system. Honest qualification of performance expectations for Canadian versus tropical conditions is provided throughout, including explicit identification of the Azolla cold-climate nitrogen fixation constraint and the system phosphorus balance limitation. A one-hectare pilot protocol is proposed for southern Ontario