Effects Of Different Amounts Of Urea And Treatment On Greenhouse Gases Emission And Ammonia Volatilization In Potato Field

Assessment of ammonia volatilization and greenhouse gases emissions play significant role in improving nitrogen utilization rate and reducing environmental risk.In this study,through different urea rate and urease inhibitors To explore the characteristics of greenhouse gas emission and ammonia volatilization in potato fields under different treatments,providing scientific basis for reasonable fertilization in Inner Mongolia Yinshan Mountain potato planting system.The main findings are as follows:1.Greenhouse gas emissions from potato fieldsThe cumulative CO2 emissions of the three trials in drip potato field were 5840.10?20231.33 kg/hm2.The treatment of fertilization significantly increased CO2 emissions compared to non-fertilization treatments.The CH4 cumulative absorption of 0.21?0.54 kg/hm2,and are not the highest fertilization treatment,fertilization had no significant effect on CH4.The content of N2O emission reached the peak after 3 days of applying nitrogen fertilizer.N2O emission loss reached 0.64?3.52 kg N/hm2.Excessive fertilization can significantly increase the cumulative N20 emissions;the gas concentration of different soil layers in the potato field profile showed different differences.the concentration of CO2 and N2O increased the rise of soil depth,But the increase of CH4 concentration showed a decreasing trend.The basic characteristics of greenhouse gas concentration in the same soil layer was:the concentration of CO2,CH4 and N2O in excessive fertilization treatment is significantly higher than other treatments;Excessive fertilization treatment could significantly increase the global warming(GWP)and greenhouse intensity(GHGI)of potatoes,but the potato yield was not significantly improved.2.Ammonia volatilization in potato fieldsThree tests showed that,The volatilization rate of ammonia was the highest at 1?5 days after fertilization,The rate of ammonia volatilization increased with the rise of fertilizer application rate.Amount of ammonia volatilization loss was 1.87?3.96 kg N/hm2 and net loss accounts for 0.21%?1.02%of N application rate.Excessive fertilization treatment of ammonia volatilization and nitrous oxide emissions were significantly higher than the other treatments.The addition of urease inhibitors reduced the amount of ammonia volatilization but did not reach significant levels.The results of experiments in the drip potato field showed that the excess nitrogen application rate significantly increased ammonia volatilization and greenhouse gas emissions.The amount of nitrogen applied to optimize and control can reduce the greenhouse effect and ammonia volatilization losses without affecting production.The addition of urease inhibitors could reduces ammonia volatilization and greenhouse gas emissions,but did not reach significant levels;Soil moisture and soil temperature have an effect on greenhouse gas emissions and ammonia volatilization...