Data/hora: 02/06/2024 02:16:36

Biblioteca(s): | Embrapa Florestas.
Data corrente: | 24/03/2021
Data da última atualização: | 13/07/2021
Autoria: | SANTOS, A.; CREMONESI, M. V.; ZANATTA, J. A.; CUNHA. L.; DRAKE, H. L.; BROWN, G. G.
Afiliação: | ALESSANDRA SANTOS, UFPR; MARCUS VINICIUS CREMONESI, UFPR; JOSILEIA ACORDI ZANATTA, CNPF; LUIS CUNHA, Universidade de Coimbra; HAROLD L. DRAKE, University of Bayreuth; GEORGE GARDNER BROWN, CNPF.
Título: | Emission of greenhouse gases and soil changes in casts of a giant Brazilian earthworm.
Ano de publicação: | 2021
Fonte/Imprenta: | Biology and Fertility of Soils, v. 57, n. 5, p. 617–628, July 2021.
DOI: | https://doi.org/10.1007/s00374-021-01552-6
Idioma: | Inglês
Conteúdo: | Greenhouse gas emissions (CO2, N2O, CH4) and chemical, physical and microbiological properties (pH, macro and micronutrients, texture, moisture, exchangeable NH4+, NO3&#8722;, total C and N, organic C, microbial biomass C and metabolic coefficient) were monitored in casts of a large, endogeic native Brazilian earthworm species Rhinodrilus alatus and from noningested control soil incubated for up to 32 days. Earthworm casts represented a significantly different chemical and microbiological environment, with higher soil moisture, pH, H + Al, exchangeable NH4, Cu, Fe and Mn contents, lower microbial biomass C and higher metabolic quotient (qCO2), but with few differences in CO2, N2O andCH4 emissions compared with noningested control soil. Nonetheless, fermenting, methanogenic and nitrate-reducing microbes encountered ideal conditions for sustained anaerobic activity in the clayey, dense and moist castings of R. alatus, maintaining emission of N2O and CH4 and confirming previous results observed using gut contents. The high exchangeable NH4 and H2O contents influenced the oxyreduction processes, affected GHG emissions and N transformations and modified soil microbial biomass and activity. In addition, selective ingestion concentrates C and N contents in the casts and transformation processes affect the availability of important plant nutrients, topics that deserve further attention, considering the widespread collection of this species for use as fish-bait in Brazil.
Palavras-Chave: | Biomassa microbiana; Gases de efeito estufa; Macronutriente; Macronutrients; Óxido nitroso; Rhinodrilus alatus.
Thesagro: | Metano; Minhoca.
Thesaurus Nal: | Methane; Microbial biomass; Nitrous oxide.
Categoria do assunto: | P Recursos Naturais, Ciências Ambientais e da Terra
Registro original: | Embrapa Florestas (CNPF)
Exemplares: | CNPF - (57641-1) - UPC - AP - DD -  -  -  - DIS