The Effect of Amprolium and Aureomycin on the Nitrification of Poultry Manure‐Amended Soil

Abstract

Poultry manure from animals fed recommended levels of amprolium and aureomycin was added to a Guelph loam soil. A soil perfusion experiment indicated that the feed additives in the manure had no effect on the nitrification rate of the soil. The rates of nitrification were 8.8 µg NO₃^‐‐N·g soil⁻¹·day⁻¹ for the 11.2 metric tons/ha addition, 28.8 µg NO₃^‐‐N·g soil⁻¹·day⁻¹ for the 33.6 metric tons/ha manure addition, and 32.4 µg NO₃^‐‐N·g soil⁻¹·day^1‐ for the addition of 0.0028M (NH₄)₂SO₄ solution.