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(Referência obtida automaticamente do Web of Science, por meio da informação sobre o financiamento pela FAPESP e o número do processo correspondente, incluída na publicação pelos autores.)

N2O emissions from urine-treated tropical soil: Effects of soil moisture and compaction, urine composition, and dung addition

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Autor(es):
Cardoso, Abmael da Silva ; Quintana, Bruna Giovani ; Janusckiewicz, Estella Rosseto ; Brito, Liziane de Figueiredo ; Morgado, Eliane da Silva ; Reis, Ricardo Andrade ; Ruggieri, Ana Claudia
Número total de Autores: 7
Tipo de documento: Artigo Científico
Fonte: CATENA; v. 157, p. 325-332, OCT 2017.
Citações Web of Science: 3
Resumo

Increasing attention is being paid to the importance of N2O emissions due to livestock activities in tropical countries. Understanding the key variables driving N2O emission could help minimize impacts of N2O release and improve the accuracy of N(2)Oinventories. We aimed to investigate the effects of soil moisture, soil compaction, urine composition, urine volume, and dung addition on N2O emissions from a urine -treated tropical Ferralsol under controlled conditions. Manipulated soil conditions (e.g., moisture content, compaction, and dung addition) affected N2O emissions when varying quantities of urine-N (p = 0.02) were applied (urine volumes remained equal) and when varying urine volumes (p = 0.04) were applied (quantities of urine-N remained equal). When the amount of urine-N applied was varied, the estimated N2O emission factor (EF) was 3.14 +/- 0.70%, 2.29 +/- 1.25%, 3.90 +/- 0.64%, 4.73 +/- 0.88%, and 6.62 +/- 1.10% for moist soil, dry soil, compacted soil, plus dung, and plus dung and compacted soil treatments, respectively. While varying the volume of urine, the estimatedN(2)O EF was 4.96 +/- 1.66%, 4.27 +/- 1.42%, 3.99 +/- 1.19%, 6.50 +/- 0.35%, and 7.37 0.76% for moist, dry soil, compacted soil, plus dung, and plus dung and compacted soils treatments, respectively. The urine-N concentration influenced N2O emissions (p = 0.02) {[}which decreased linearly (p = 0.062)] as well the volume of urine (p < 0.01) {[}which increased linearly (p < 0.01)]. The chemical form of the applied urine-N (urea, nitrate, or ammonium) did not affect N2O emissions and the emissions factor averaged 1.40 +/- 0.38%. N(2)Oproduction was affected by the KCI concentration in the urine (p < 0.01), and the effect was curvilinear. The key driving factor affecting N2O emissions was soil moisture content. The N2O response varied when the urine volume differed (in both moist and dry soil conditions), and with the addition of dung. (AU)

Processo FAPESP: 12/04605-1 - Emissões de gases de efeito estufa em pastos de Brachiaria submetidos a diferentes intensidades de pastejo
Beneficiário:Eliane da Silva Morgado
Linha de fomento: Bolsas no Brasil - Pós-Doutorado
Processo FAPESP: 12/06718-8 - Balanço de nitrogênio, emissão de gases de efeito estufa e mitigação de N2O na produção de bovinos de corte em pastagens
Beneficiário:Abmael da Silva Cardoso
Linha de fomento: Bolsas no Brasil - Doutorado
Processo FAPESP: 11/00060-8 - Balanço de gases de efeito estufa e estratégias de mitigação em pastos de Brachiaria submetidos a diferentes manejos
Beneficiário:Telma Teresinha Berchielli
Linha de fomento: Auxílio à Pesquisa - Temático
Processo FAPESP: 13/00204-5 - Perdas de nitrogênio por volatilização e Emissão de N2O pelas excretas bovinas em pastagens
Beneficiário:Serena Capriogli Oliveira
Linha de fomento: Bolsas no Brasil - Iniciação Científica
Processo FAPESP: 13/24782-8 - Efeito do biochar sobre a contribuição da nitrificação e desnitrificação para os fluxos de N2O em solo tropical e temperado
Beneficiário:Abmael da Silva Cardoso
Linha de fomento: Bolsas no Exterior - Estágio de Pesquisa - Doutorado