Changes in nitrogen isotopic compositions during composting of cattle feedlot manure: effects of bedding material type.
Bioresour Technol
; 99(13): 5452-8, 2008 Sep.
Article
em En
| MEDLINE
| ID: mdl-18077156
Temporal changes in delta(15)N of cattle feedlot manure during its composting with either rice hull (RHM) or sawdust (SDM) as bedding materials were investigated. Regardless of the bedding material used, the delta(15)N of total N in the manure increased sharply from +7.6 per thousand to +9.9 per thousand and from +11.4 per thousand to +14.3 per thousand, respectively, in RHM or SDM, within 10 days from the commencement of composting. Such increases could be attributed primarily to N loss via NH(3) volatilization and denitrification based on the very high delta(15)N values (greater than +20 per thousand) of NH(4)(+) and NO(3)(-) in the co-composted manure. The delta(15)N of total N in RHM was substantially lower (by more than 3 per thousand) than that in SDM, suggesting that the delta(15)N of the composted manure was affected not only by N loss but also by the type of bedding material used. Specifically, the higher N concentration in the rice hull than in the saw dust could lead to a greater (15)N isotope dilution.
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Coleções:
01-internacional
Base de dados:
MEDLINE
Assunto principal:
Solo
/
Roupas de Cama, Mesa e Banho
/
Bovinos
/
Abrigo para Animais
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Ração Animal
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Esterco
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Nitrogênio
Limite:
Animals
País/Região como assunto:
Asia
Idioma:
En
Ano de publicação:
2008
Tipo de documento:
Article