Generally, zinc is one of the essential elements in the body. In recent years, it has been used as a tool for reducing the use of antibiotics and to prevent diarrheal diseases in weaned piglets. To achieve the antimicrobial activity, zinc should be administered in high doses (2000 – 2500 mg/kg diet) and usually in the form of zinc oxide. These over-limit doses of zinc lead to excessive accumulation in pig manure, which is subsequently applied as a fertilizer for maize. This creates a problem when soils are supersaturated with over limit of zinc. The solution can be the use of latest nanotechnology-based techniques, where zinc doses can be dramatically reduced while its effect is maintained. The aim of this methodology was to create a coherent process of zinc nanocomplexes synthesis using phosphates. The microbiological characteristics of the individual nanocomplexes of zinc are part of the methodology.