The results of soil incubation experiments showed that AM mitigated N2O emission from soil where nitrogen fertilizer had been applied. The effect of AM on reducing N2O emissions was weaker than nitrapyrin but stronger than sulfathiazole and 1-aryl-2-thiourea (Table 1). Application of AM did not inhibit soil respiration. The side effects of AM on 7 bacterial species that contribute to agricultural production in the field were tested. AM proved to inhibit the growth of these bacteria to the same degree as other inhibitors (Table 2). These results show that AM selectively inhibits nitrification bacteria and that the side effects on other bacteria are minor. It was concluded that AM can be used to mitigate N2O emissions from agricultural soil as an alternative to nitrapyrin.
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