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Shvoong Home>Science>Agronomy - Agriculture>Effect of nitrification inhibitor and aeration regulation on soil N_2O emission Summary

Effect of nitrification inhibitor and aeration regulation on soil N_2O emission

Article Summary   by:TsingHua     Original Author: Plant Nutrition and Fertilizing Science
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Laboratory incubation experiments were carried out to investigate effects of soil moisture and temperature on(nitrification) rate and N_2O emission,and effects of nitrification inhibitor(N-Serve) incorporated with sand on N_2O emission.The rate of nitrification was increased with the rising of soil temperature,with the highest rate at 30 ℃;soil moisture didn't affect the rate of nitrification significantly.N_2O emission is increased with the rising of soil temperature and moisture.The highest N_2O emission occurred at soil moisture being 28.5% and soil temperature being 20℃ or 30 ℃.At 30 ℃,N_2O production was quite low under moisture stress(14.2%) with a cumulative N_2O emission being 126.4 (mg/kg),which was primarily from nitrification;cumulative N_2O emission was decreased by 65.0% when 80mg/kg N-Serve was added.Cumulative N_2O emission increased rapidly with the cumulative emission being 764.4 mg/kg when soil moisture increased to 28.5% under which denitrification occured;however,it was decreased by 82.9% and 62.1%,(respectively) when mixing sand at a ratio of 1∶1 or adding N-Serve.We could conclude that applying N-Serve could(inhibit) nitrification at low soil moisture,while at the high soil moisture,applying sand or combine applying sand with N-serve could inhibit N_2O emission efficiently.
Published: January 25, 2006   
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