Effects of atrazine application on soil aggregates, soil organic carbon and glomalin-related soil protein

Atrazine is still widely used in China. residue (1.86-1 100 mg/kg) the soil has exceeded allowable limit (1.0 mg/kg), affecting structure and aggregate composition. To understand long-term application of atrazine on aggregates binding agent, four treatments were established cornfield planted since 1998, including without applied (AT0), (28% atrazine, 1 200-1 350 mL/ha/year) once a year from 2012 to 2018 (AT6, 167 2008 (AT10, 127.64 as well 2002 (AT16, 102 with three replications. Along increase time, mass fraction > 5 mm 2-5 decreased significantly while 0.5-2 < 0.5 increased gradually, change agents contents same that aggregates. The organic carbon (SOC) glomalin-related protein (GRSP) negatively correlated years application. Our results show although does not yearly application, its concentration markedly higher than permitted value seriously affected content SOC GRSP 2 mm, which can lead decrease stability quality.