Kirchmann, Holger
- Department of Soil Sciences, Swedish University of Agricultural Sciences
Abstract
Fresh cattle, pig and poultry excreta as well as aerobically and anaerobically decomposed materials of the same origin were analysed. Highest concentrations of plant nutrients were found in poultry excreta, followed by pig and cattle faeces. Calcium was the dominant element in the materials. Uric acid was the major nitrogen form in fresh poultry excreta (61%). Fresh cattle and pig faeces contained small amounts of ammonium N and traces of urea, but no nitrate. The main form of N in fresh and aerobic faeces was organic bound N. Low concentrations of nitrate (< 0.5% of total N) were indicative of aerobically treated materials, whereas high ammonium N concentrations (50-75% of total N) were typical for anaerobic materials. The C/N ratios increased during anaerobic decomposition in all materials.
Keywords
CARBON; C/N RATIO; NITROGEN; ORGANIC MATTER; PLANT NUTRIENTS
Published in
Bioresource Technology
1992, volume: 40, number: 2, pages: 137-142
Publisher: ELSEVIER SCI LTD
SLU Authors
Witter, Ernst
- Department of Soil Sciences, Swedish University of Agricultural Sciences
- Department of Soil Sciences, Swedish University of Agricultural Sciences
UKÄ Subject classification
Soil Science
Agricultural Science
Publication identifier
- DOI: https://doi.org/10.1016/0960-8524(92)90199-8
Permanent link to this page (URI)
https://res.slu.se/id/publ/44231