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In this study, conventional large-scale cultivation of winter wheat and soybean crops as experimental material , the use of field experiment , carried out two winter wheat growing season , a soybean growing season tests. Set up a control , ozone concentration both treatments . Static tank - gas chromatography analysis of CO2 and N2O fluxes , and analyzes plant biomass, leaf nitrogen , nitrate nitrogen , ammonia nitrogen content , chlorophyll content , soluble protein content in leaves , leaf nitrate reductase activity ; analysis of soil total nitrogen, nitrate , ammonia nitrogen content . Explore the ozone concentration in soil - crop system respiration rate and N20 emissions were investigated , and preliminary analysis of the impact mechanism . For the objective evaluation of the ecological effects of elevated ozone concentrations , ozone concentration scenarios predict regional agricultural greenhouse gas emission trends provide the basis . The results showed that: the ozone concentration did not change the soil - Winter respiration rate and N20 emissions seasonal variation . Ozone concentration was significantly decreased soil - Winter Respiration rate , T1 decreased by 26.8% (p = 0.000), T2 reached 45.6% (p = 0.000); ozone concentration also significantly reduced the soil - wheat system N2O emissions , T1 drop of 23.1% (p = 0.000), T2 decreased by 27.5% (p = 0.000). Ozone concentration did not change the soil - Soybean respiration rate and N2O emissions from the seasonal variation . Ozone concentration was significantly decreased soil - soybean Respiration rate , T1, T2 group decreased by 23.5% (p = 0.000) and 20.2% (p = 0.000). For the impact of N2O emission is no certain regularity . Soil - Winter Respiration rate there is a clear diurnal variation of ozone concentration did not change its diurnal variation . Soil - Winter diurnal variation of N2O emissions system performance randomness. Ozone concentration by affecting crops on the ground , underground part and the total biomass , chlorophyll content, soluble protein content, nitrate reductase activity, total nitrogen, nitrate nitrogen , ammonia nitrogen content , and total nitrogen , nitrate , ammonia nitrogen content , thereby affecting respiration rate and N2O emissions.
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