Details

Autor(en) / Beteiligte

• Kim, Young-Joo
• Choi, Woo-Jung
• Lim, Sang-Sun
• Kwak, Jin-Hyeob
• Chang, Scott X.
• Kim, Han-Yong
• Yoon, Kwang-Sik
• Ro, Hee-Myong

Titel

Changes in nitrogen isotopic compositions during composting of cattle feedlot manure: Effects of bedding material type

Ist Teil von

• Bioresource technology, 2008-09, Vol.99 (13), p.5452-5458

Ort / Verlag

Oxford: Elsevier Ltd

Erscheinungsjahr

2008

Quelle

MEDLINE

Beschreibungen/Notizen

• Temporal changes in δ 15N 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 δ 15N of total N in the manure increased sharply from +7.6‰ to +9.9‰ and from +11.4‰ to +14.3‰, 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 δ 15N values (greater than +20‰) of NH 4 + and NO 3 - in the co-composted manure. The δ 15N of total N in RHM was substantially lower (by more than 3‰) than that in SDM, suggesting that the δ 15N 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 15N isotope dilution.