Abstract

We studied the decomposition of aerobically and anaerobically treated pig manure during a 2-month incubation with soil. The manure samples had not been in contact with straw or with animal urine. The aerobically decomposed manure proved to be the most stable (23% C mineralization), followed by fresh (75%) and anaerobically treated manure (105%, priming effect). The course of mineralization fitted combined first- and zero-order kinetics. In the anaerobically treated manure, 76% of NH4+-N was immobilized during the initial incubation phase, followed by a slow linear mineralization. In the aerobically treated manure there was a slow linear mineralization after 5 days, and in the fresh material, a slightly faster linear mineralization after 6 days. Total mineralized N was very similar after 2 months (12%) in all treatments. Total NH3 losses were highest from the anaerobically treated manure (14%), reflecting a higher NH4+ content with N mineralization following first-order kinetics. Relating NH3 losses to the initial NH4+ content showed that all NH3 in the aerobically treated manure was volatilized, whereas only 28% was volatilized from the fresh and the anaerobically treated manure.

Keywords

AMMONIA LOSS; CO2-C EVOLUTION; COMBINED 1ST-ORDER AND ZERO-ORDER KINETICS; N-IMMOBILIZATION; NITRIFICATION; NONLINEAR REGRESSION; PRIMING EFFECT

Published in

Biology and Fertility of Soils
1992, Volume: 13, number: 3, pages: 135-141
Publisher: SPRINGER VERLAG

SLU Authors

• Kirchmann, Holger

  • Department of Soil Sciences, Swedish University of Agricultural Sciences
    

UKÄ Subject classification

Soil Science
Agricultural Science


Publication identifier

DOI: https://doi.org/10.1007/BF00336268

Permanent link to this page (URI)

https://res.slu.se/id/publ/44229