Gaseous nitrogen losses following soil amendment with biosolids under controlled conditions

Pu, Guixin, Barry, Glen and Bell, Mike (2010) Gaseous nitrogen losses following soil amendment with biosolids under controlled conditions. Journal of Residuals Science and Technology, 7 4: 209-217.

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Author Pu, Guixin
Barry, Glen
Bell, Mike
Title Gaseous nitrogen losses following soil amendment with biosolids under controlled conditions
Journal name Journal of Residuals Science and Technology   Check publisher's open access policy
ISSN 1544-8053
Publication date 2010-10
Sub-type Article (original research)
Volume 7
Issue 4
Start page 209
End page 217
Total pages 9
Place of publication Lancaster, PA, U.S.A.
Publisher DEStech Publications
Collection year 2011
Language eng
Formatted abstract
This paper quantifies gaseous N losses due to ammonia volatilisation and denitrification under controlled conditions at 30°C and 75% to 150% of Field Capacity (FC). Biosolids were mixed with two contrasting soils from subtropical Australia at a rate designed to meet crop N requirements for irrigated cotton or maize (i.e., equivalent to 180 kg N ha-1). In the first experiment, aerobically (AE) and anaerobically (AN) digested biosolids were mixed into a heavy Vertosol soil and then incubated for 105 days. Ammonia volatilization over 72 days accounted for less than 4% of the applied NH 4-N but 24% (AN) to 29% (AE) of the total applied biosolids' N was lost through denitrification in 105 days. In the second experiment AN biosolids with and without added polyacrimide polymer were mixed with either a heavy Vertosol or a lighter Red Ferrosol and then incubated for 98 days. The N loss was higher from the Vertosol with16-29% of total N applied versus the Red Ferrosol with 7-10% of total N applied, while addition of polymer to the biosolids increased N loss from 7 to 10% and from 16 to 29% in the Red Ferrosol and Vertosol, respectively. A major product from the denitrification process was N2 gas, accounting for >90% of the emitted N gases from both experiments. Our findings demonstrate that denitrification could be a major pathway of gaseous N losses under warm and moist conditions.
© 2010 DEStech Publications, Inc.
Keyword Addition of polymer
Ammonia volatilization
Denitrification process
Q-Index Code C1
Q-Index Status Confirmed Code
Institutional Status Non-UQ

Document type: Journal Article
Sub-type: Article (original research)
Collections: Non HERDC
School of Agriculture and Food Sciences
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Created: Wed, 23 Mar 2011, 09:11:09 EST by Samantha Richards on behalf of Qld Alliance for Agriculture and Food Innovation