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Registro Completo |
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Biblioteca(s): |
Embrapa Suínos e Aves. |
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Data corrente: |
09/05/2018 |
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Data da última atualização: |
22/08/2018 |
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Tipo da produção científica: |
Artigo em Periódico Indexado |
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Autoria: |
GRAVE, R. A.; NICOLOSO, R. da S.; CASSOL, P. C.; SILVA, M. L. B. da; MEZZARI, M. P.; AITA, C.; WUADEN, C. R. |
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Afiliação: |
ROBERTO ANDRÉ GRAVE, IFC/Concórdia; RODRIGO DA SILVEIRA NICOLOSO, CNPSA; PAULO CEZAR CASSOL, UDESC/Lages; MARCIO LUIS BUSI DA SILVA, CNPSA; MELISSA PAOLA MEZZARI, University of Texas; CELSO AITA, UFSM; CAMILA ROSANE WUADEN, UDESC/Lages. |
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Título: |
Determining the effects of tillage and nitrogen sources on soil N2O emission. |
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Ano de publicação: |
2018 |
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Fonte/Imprenta: |
Soil & Tillage Research, v. 175, p. 1-12, 2018. |
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Idioma: |
Inglês |
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Conteúdo: |
Abstract: Soil tillage and fertilization can affect the abundance of nitrifying and denitrifying microbial communities known to regulate N2O losses from agricultural soils. We assessed the effects of mineral and organic N sources on short-term N2O emissions from a Rhodic Nitisol under contrasting soil disturbance. The experiment followed a split-plot design with two soil tillage systems as main plots (tilled soil: TS, and no-till soil: NTS) and five fertilization treatments as subplots, where 140 kg N ha−1 were applied either as urea (UR), raw swine slurry (RS), anaerobically digested swine slurry (ADS), or composted swine slurry (CS). A treatment without N fertilization was used as control (CTR). N2O emissions were determined by using static chambers and correlated with soil (0?0.1 m) temperature, water-filled pore space (WFPS), dissolved organic carbon (DOC), ammonium (NH4 +-N), nitrate (NO3 −-N) and the abundance of specific nitrification and denitrification biomarker genes [ammonium monooxygenase (amoA), nitrate- (narG), nitrite- (nirS), nitric oxide- (qnorB) and nitrous oxide reductases (nosZ)]. Denitrification was the main source of N2O as assessed by increased narG/16S rDNA and narG/nosZ ratios regardless of soil tillage. N2O emissions were augmented in the NTS (30 to 200% higher than TS) where higher soil WFPS (0.6-0.7 cm3 cm−3 ) favored incomplete denitrification. The application of ADS in the NTS decreased denitrification rates and cumulative N2O emission by 47% in comparison with RS (2.9 and 5.6 kg N2O-N ha−1, respectively). Interestingly, N2O emission from the NTS receiving CS (4.7 kg N2O-N ha−1 ) was also promoted by the proliferation of heterotrophic nitrifying bacteria communities. Overal, swine slurry treatment can help mitigate N2O emission from agricultural soils, particularly in regions where this source of fertilizer is abundant and readily available. MenosAbstract: Soil tillage and fertilization can affect the abundance of nitrifying and denitrifying microbial communities known to regulate N2O losses from agricultural soils. We assessed the effects of mineral and organic N sources on short-term N2O emissions from a Rhodic Nitisol under contrasting soil disturbance. The experiment followed a split-plot design with two soil tillage systems as main plots (tilled soil: TS, and no-till soil: NTS) and five fertilization treatments as subplots, where 140 kg N ha−1 were applied either as urea (UR), raw swine slurry (RS), anaerobically digested swine slurry (ADS), or composted swine slurry (CS). A treatment without N fertilization was used as control (CTR). N2O emissions were determined by using static chambers and correlated with soil (0?0.1 m) temperature, water-filled pore space (WFPS), dissolved organic carbon (DOC), ammonium (NH4 +-N), nitrate (NO3 −-N) and the abundance of specific nitrification and denitrification biomarker genes [ammonium monooxygenase (amoA), nitrate- (narG), nitrite- (nirS), nitric oxide- (qnorB) and nitrous oxide reductases (nosZ)]. Denitrification was the main source of N2O as assessed by increased narG/16S rDNA and narG/nosZ ratios regardless of soil tillage. N2O emissions were augmented in the NTS (30 to 200% higher than TS) where higher soil WFPS (0.6-0.7 cm3 cm−3 ) favored incomplete denitrification. The application of ADS in the NTS decreased denitrification rates and cumulative N2O ... Mostrar Tudo |
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Palavras-Chave: |
QPCR em tempo real; Reação em cadeia quantitativa da polimerase. |
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Thesagro: |
Biodigestor; Compostagem; Dejeto; Meio Ambiente; Plantio Direto; Solo. |
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Categoria do assunto: |
-- |
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Marc: |
LEADER 02747naa a2200289 a 4500
001 2091309
005 2018-08-22
008 2018 bl uuuu u00u1 u #d
100 1 $aGRAVE, R. A.
245 $aDetermining the effects of tillage and nitrogen sources on soil N2O emission.$h[electronic resource]
260 $c2018
520 $aAbstract: Soil tillage and fertilization can affect the abundance of nitrifying and denitrifying microbial communities known to regulate N2O losses from agricultural soils. We assessed the effects of mineral and organic N sources on short-term N2O emissions from a Rhodic Nitisol under contrasting soil disturbance. The experiment followed a split-plot design with two soil tillage systems as main plots (tilled soil: TS, and no-till soil: NTS) and five fertilization treatments as subplots, where 140 kg N ha−1 were applied either as urea (UR), raw swine slurry (RS), anaerobically digested swine slurry (ADS), or composted swine slurry (CS). A treatment without N fertilization was used as control (CTR). N2O emissions were determined by using static chambers and correlated with soil (0?0.1 m) temperature, water-filled pore space (WFPS), dissolved organic carbon (DOC), ammonium (NH4 +-N), nitrate (NO3 −-N) and the abundance of specific nitrification and denitrification biomarker genes [ammonium monooxygenase (amoA), nitrate- (narG), nitrite- (nirS), nitric oxide- (qnorB) and nitrous oxide reductases (nosZ)]. Denitrification was the main source of N2O as assessed by increased narG/16S rDNA and narG/nosZ ratios regardless of soil tillage. N2O emissions were augmented in the NTS (30 to 200% higher than TS) where higher soil WFPS (0.6-0.7 cm3 cm−3 ) favored incomplete denitrification. The application of ADS in the NTS decreased denitrification rates and cumulative N2O emission by 47% in comparison with RS (2.9 and 5.6 kg N2O-N ha−1, respectively). Interestingly, N2O emission from the NTS receiving CS (4.7 kg N2O-N ha−1 ) was also promoted by the proliferation of heterotrophic nitrifying bacteria communities. Overal, swine slurry treatment can help mitigate N2O emission from agricultural soils, particularly in regions where this source of fertilizer is abundant and readily available.
650 $aBiodigestor
650 $aCompostagem
650 $aDejeto
650 $aMeio Ambiente
650 $aPlantio Direto
650 $aSolo
653 $aQPCR em tempo real
653 $aReação em cadeia quantitativa da polimerase
700 1 $aNICOLOSO, R. da S.
700 1 $aCASSOL, P. C.
700 1 $aSILVA, M. L. B. da
700 1 $aMEZZARI, M. P.
700 1 $aAITA, C.
700 1 $aWUADEN, C. R.
773 $tSoil & Tillage Research$gv. 175, p. 1-12, 2018.
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Embrapa Suínos e Aves (CNPSA) |
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| 1. |  | NOBREGA, S. R.; COELHO, A. L. F.; VEROLA, C. F.; COSTA, I. R.; VILACA, R.; LUZ, F. J. de F.; ARAÚJO, W. F. Chromosome variations and diversity of Epidendrum ibaguense Lindl. (Orchidaceae) on the Tepequém's Tepuy, Roraima, Brazil. Genetics and Molecular Research, v. 16, n.3, 2017.| Tipo: Artigo em Periódico Indexado | Circulação/Nível: A - 2 |
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