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How do greenhouse gas emissions vary with biofertilizer type and soil temperature and moisture in a tropical grassland?

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Pedosphere 2020年第5期30卷 607-617页

作者： Abmael da Silva CARDOSO Juliana Bega JUNQUEIRA Ricardo Andrade REIS Ana Claudia RUGGIERIAnimal Science Departament College of Agricultural and Veterinarian SciencesSao Paulo State UniversityJaboticabal 14884-900(Brazil) Kenji Agricultural and Environmental Consultancy Ribeirdo Preto 14010-079(Brazil)

Greenhouse gases are known to play an important role in global *** this study,we determined the effects of selected soil and climate variables on nitrous oxide(N2O),methane(CH4),and carbon dioxide(CO2)emissions from a tropical grassland fertilized with chicken slurry,swine slurry,cattle slurry,and cattle *** N2O emissions did not differ between treatments and varied from 29.26 to 32.85 mg N m^-***,cumulative CH4 emissions were not significantly different among the treatments and ranged from 6.34 to 57.73 mg CH4 m^-*** and compost application induced CO2 emissions that were significantly different from those in the control *** CH4 conversion factors measured were 0.21%,1.39%,4.39%,and 5.07%for cattle compost,chicken slurry,swine slurry,and cattle slurry,respectively,differing from the recommendations of the Intergovernmental Panel on Climate Change(IPCC).The fraction of added Nemitted as N2O was 0.39%,which was lower than the IPCC default value of 2%.Our findings suggest that N2O emissions could be mitigated by replacing synthetic fertilizer sources with either biofertilizer or *** results indicate the following:N2O emission was mainly controlled by soil temperature,followed by soil moisture and then soil NH^"content;CH4 fluxes were mainly controlled by soil moisture and chamber headspace temperature;and CO2 fluxes were mainly controlled by chamber headspace temperature and soil moisture.

关键词： emission factor methane conversion factor methane oxidation methane production capacity slurry fertilizer soil moisture

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