02891naa a2200337 a 450000100080000000500110000800800410001902400570006010000200011724501250013726000090026252019080027165000120217965000250219165000290221665000130224565000140225865000130227265000120228565000160229765300150231365300240232865300170235265300220236970000160239170000200240770000200242770000180244770000220246577300660248720875802019-10-30       2018    bl uuuu     u00u1 u    #d7 ahttps://doi.org/10.1016/j.scitotenv.2017.12.1962DOI1 aGRUTZMACHER, P.  aCarbon stability and mitigation of fertilizer induced N2O emissions in soil amended with biochar.h[electronic resource]  c2018  aBiochar is a promising tool for an efficient and low environmental impact agriculture since can offer both soil carbon (C) sequestration and mitigation of nitrous oxide (N2O) emissions. The extent of biochar C stability after soil amendment and efficiency in reducing N2O emissions from an external nitrogen (N) source were accessed through laboratory incubations. A clay loam soil was amended with chicken manure (CM), sewage sludge (SS), eucalyptus sawdust (ES) and filter cake (FC) feedstocks and corresponding slow-pyrolysis (400 °C) biochars at 5 g C kg? 1 soil in combination with two N fertilizer rates (0 and 140 mg N kg? 1 soil). Carbon dioxide (CO2) and N2O emissions were measured during 60 days. Biochars and feedstocks CO2 emissions were described by an exponential first order kinetics model. For C mineralization an interaction effect was observed for feedstock source and organic amendment. Lower values of mineralizable C was found for biochars than corresponding feedstocks, except for ES. Carbon losses in 60 days of incubation totaled between 0.8 and 9.4% and 2.4 and 32% for biochars and feedstocks, respectively. Regarding to N2O emissions, only CM-biochar impacted emissions with a two-fold increase in non-fertilized soil. When NH4NO3 was co-applied, biochars reduced fertilizer induced N2O emissions, reaching a seven-fold reduction in SS-biochar treatment. The fertilizer emission factor (EF) decreased with biochar amendments as well, varying between 0.01 and 0.08% of the fertilizer N emitted as N2O, which shows the biochar potential to reduce fertilizer induced N2O emissions, with major reduction by SS-biochar mitigating 87% of the soil-fertilizer emissions. Such potential could be explored by designing biochars based on feedstock chemical and structural properties, including a mixed feedstock source biochar that promotes C sequestration and mitigates N2O emissions.  aBiochar  acarbon sequestration  aGreenhouse gas emissions  anitrogen  aPyrolysis  aBiomassa  aCarbono  aNitrogênio  aBiocarvão  aBiomassa pirolisada  aBlack carbon  aPyrolized biomass1 aPUGA, A. P.1 aBIBAR, M. P. S.1 aCOSCIONE, A. R.1 aPACKER, A. P.1 aANDRADE, C. A. de  tScience of The Total Environmentgv. 625, p. 1459-1466, 2018.