The researchers studied how enhanced UV-B radiation affects respiration and N2O emissions in winter wheat fields. They found that UV-B radiation did not change the diurnal variations of respiration rate or N2O emissions, but it did inhibit respiration rate. At certain growth stages, UV-B radiation significantly decreased respiration rate and N2O emissions from the soil-winter wheat system. Overall, UV-B radiation had varying impacts on different stages of plant growth, affecting respiration and N2O emissions in winter wheat ecosystems.