Data/hora: 16/06/2024 17:32:43

Biblioteca(s): | Embrapa Pantanal.
Data corrente: | 19/02/1997
Data da última atualização: | 19/02/1997
Autoria: | STOUT, J. D.; BAWDEN, A. D.; COLEMAN, D. C.
Título: | Rates and pathways of mineral nitrogen transformation in a soil from pasture.
Ano de publicação: | 1984
Fonte/Imprenta: | Soil Biology and Biochemistry, v.16, n.2, p.127-131, 1984.
Idioma: | Inglês
Conteúdo: | Short-term metabolic activities, including ammonification, nitrification, denitrification and the release of CO2 with and without added substrate, and most probable numbers of ammonifiers, nitrifiers and denitrifiers were measured on stored topsoil from pasture over 140 days in the absence of growing plants. Parallel samples of irradiated and untreate soil were examined. Release of mineral-N, chiefly as NH4+-N, was greater from the irradiated soil. In the untreated soil there was a slight increase in NO3-N. Microorganisms (estimated by MPN method) and microbial respiration in the untreated soil increased, and then diminished with time. The release of 13N2O and 13N2 was measured from intact soil cores amended with 13NO3-N and 13NH+4-N. The principal product from the treated soil when 13NO-3-N was added was 13N2, with little 13N2O whereas the irradiated soil evolved both 13N2 and 13N2O. Similarly, the irradiated soil continuously evolved 13N2O from 13NH+4-N in contrast to the untreated soil.
Palavras-Chave: | Mineral nitrogen; Pasture; Pathways; Rates; Taxas.
Thesagro: | Nitrogênio; Pastagem; Solo.
Thesaurus Nal: | soil.
Categoria do assunto: | --
Registro original: | Embrapa Pantanal (CPAP)
Exemplares: | CPAP - (33929-1) - ADD - SP - -- - SP3479 -  - 3479 - DIS