Dynamic Response of Soil Enzymes and Microbial Diversity to Continuous Application of Atrazine in Black Soil of a Cornfield without Rotation in Northeast China

Atrazine has been extensively used in China’s agricultural production for a long time and the potential risks to environment have received widespread attention. The purpose of this study was examine effect continuous application atrazine on soil herbicide residues, enzyme activity, microbial community structure, as well provide theoretical reference appropriate improvement soil. Previous studies focused effects microorganisms, but experiments higher doses than recommended. To reveal actual recommended dose 0, 1, 2 years. We studied residues activity soil, phospholipid fatty acids (PLFA) were measured structure microbiome. results show that rate degradation occurred rapidly after initial administration, with increase its half-life decreased from 24.6 d first year 14.1 second year. significantly affected urease cellulase it had no significant saccharase activity. biomass cultured bacteria not culturable fungi actinomycetes Furthermore, PLFA analysis These indicate during is related high adaptability