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利用土柱模拟农田污灌下的包气带环境，对人工微生物在包气带中反硝化作用除氮进行了研究。并讨论了脱氮机理、脱氮效果及环境影响因素
Soil column was used to simulate the aeration zone under farmland sewage irrigation, and the denitrification of artificial microorganisms in aeration zone was studied. The mechanism of denitrification, denitrification and environmental factors were also discussed