Journal article
Effects of moisture and temperature on greenhouse gas emissions and C and N leaching losses in soil treated with biogas slurry



Publication Details
Authors:
Sänger, A.; Geisseler, D.; Ludwig, B.
Publisher:
SPRINGER
Publication year:
2011
Journal:
Biology and Fertility of Soils
Pages range:
249-259
Volume number:
47
Issue number:
3
Start page:
249
End page:
259
Number of pages:
11
ISSN:
0178-2762

Abstract
The objective of this study was to examine the effects of soil moisture, irrigation pattern, and temperature on gaseous and leaching losses of carbon (C) and nitrogen (N) from soils amended with biogas slurry (BS). Undisturbed soil cores were amended with BS (33 kg N ha(-1)) and incubated at 13.5A degrees C and 23.5A degrees C under continuous irrigation (2 mm day(-1)) or cycles of strong irrigation and partial drying (every 6 weeks, 1 week with 12 mm day(-1)). During the 6 weeks after BS application, on average, 30% and 3.8% of the C and N applied with BS were emitted as carbon dioxide (CO(2)) and nitrous oxide (N(2)O), respectively. Across all treatments, a temperature increase of 10A degrees C increased N(2)O and CO(2) emissions by a factor of 3.7 and 1.7, respectively. The irrigation pattern strongly affected the temporal production of CO(2) and N(2)O but had no significant effect on the cumulative production. Nitrogen was predominantly lost in the form of nitrate (NO (3) (-) ). On average, 16% of the N applied was lost as NO (3) (-) . Nitrate leaching was significantly increased at the higher temperature (P < 0.01), while the irrigation pattern had no effect (P = 0.63). Our results show that the C and N turnovers were strongly affected by BS application and soil temperature whereas irrigation pattern had only minor effects. A considerable proportion of the C and N in BS were readily available for soil microorganisms.


Keywords
Biogas slurry, Methane oxidation, Nitrate leaching, nitrous oxide emissions, temperature


Authors/Editors

Last updated on 2019-06-05 at 11:17