How do methane rates vary with soil moisture and compaction, N compound and rate, and dung addition in a tropical soil?

Autor(es)

Cardoso, Abmael da Silva ^[1] ; Quintana, Bruna Giovani ^[1] ; Janusckiewicz, Estella Rosseto ^[1] ; Brito, Liziane de Figueiredo ^[1] ; Morgado, Eliane da Silva ^[2] ; Reis, Ricardo Andrade ^[1] ; Ruggieri, Ana Claudia ^[1]

Afiliação do(s) autor(es)

^[1] Univ Estadual Paulista, UNESP, Dept Anim Sci, Fac Ciencias Agr & Vet, Via Acesso Prof Paulo Donato Castellane, BR-14884900 Jaboticabal, SP - Brazil

^[2] Univ Fed Uberlandia, Rua Joao Naves Avila 2121, BR-38408100 Uberlandia, MG - Brazil

• Tipo de documento: Artigo Científico
• Fonte: INTERNATIONAL JOURNAL OF BIOMETEOROLOGY; v. 63, n. 11, SI, p. 1533-1540, NOV 2019.
• Citações Web of Science: 0

Resumo

Soil moisture and compaction, and source of N and bovine urine can reduce methane (CH4) rates from agricultural soils. However, the magnitude of the effect is unknown in tropical soil under different conditions, as well as the potential of different urine-N concentration, volume, and sources of N in such an effect. This study aimed to investigate the effects of different soil conditions (moist, dry, compacted, moist-dung, moist-dung-compacted), N concentration in urine (2.5, 5.0, 10.0, and 15.0 g N L-1), volume of urine (25, 50, 100, and 200 ml kg(-1) dry soil), and source of N (ammonium, nitrate, and urea) on CH4 emissions. A tropical Ferralsol soil from marandu-grass pasture was incubated during 106 days and the CH4 concentration determined by gas chromatography. The CH4 rates varied significantly according to the soil conditions when manipulated the urine-N (p < 0.01) and averaged 0.75, - 0.50, 1.14, 6.23, and 8.17 mu g C-CH4 m(-2) h(-1)for the moist, dry, compacted, moist-dung, and moist-dung-compacted soil, respectively, and, not responded to the level of N (p = 0.73) averaging 2.57 mu g C-CH4 m(-2) h(-1). When evaluated, the volumes of urine cumulative CH4 averages were - 0.52, - 1.24, - 0.88, 14.48, and 18.56 mu g C-CH4 m(-2) h(-1) for the moist, dry, compacted, moist-dung, and moist-dung-compacted, respectively. Soils were affected by soil treatments (p < 0.001) but not by urine volumes (p = 0.30). The source of N did not influence the CH4 rates (p = 0.1) averaging 0.88, - 1.26, and - 1.19 mu g C-CH4 m(-2) h(-1) respectively, for urea, nitrate, and ammonium. The CH4 fluxes in tropical Ferralsols are controlled by the soil characteristics and dung addition. (AU)

• 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
• Modalidade de apoio: 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
• Modalidade de apoio: Auxílio à Pesquisa - Temático
• 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
• Modalidade de apoio: Bolsas no Brasil - Pós-Doutorado