
%0 Journal Article
%A Barkle, G. F. 
%A Stenger, R. 
%A Sparling, G. P. 
%A Painter, D. J. 
%T Immobilisation and mineralisation of carbon and nitrogen from dairy farm effluent during laboratory soil incubations
%J Soil Research
%D 2001/11/28
%V 39
%N 6
%P 1407-1417
%K Net nitrogen mineralisation, CO2, glucose, microbial biomass, inorganic nitrogen.
%R https://doi.org/10.1071/SR00084
%U https://www.publish.csiro.au/paper/SR00084 
%X To investigate the microbial turnover of dairy farm effluent (DFE) irrigated onto soils we applied two loading rates (standard DFE, high DFE) onto a silt clay loam. Additionally, we investigated the microbial availability of the soluble DFE fraction compared with that of a glucose plus ammonium solution. The soil was incubated at 25&#x02DA;C for up to 244 days. A water-amended treatment was used as the control. Net carbon mineralisation in the standard DFE treatment was finished within 13 days and amounted to 29.7 2.4% of the carbon applied, whereas in the high DFE treatment it continued until the end of the measurements (Day 50) and reached 48.4 0.5%. DFE application at the standard rate had only a minor effect on soil microbial biomass, but the high DFE application supported a higher microbial biomass over a longer period. Nitrogen immobilisation persisted in the standard DFE treatment throughout the experiment, while the high DFE treatment shifted to the net mineralisation phase by Day 113. Approximately 60% of the amended C was mineralised within 13 days in both the soluble DFE and glucose treatments, indicating similar microbial availability. Microbial growth, however, occurred only in the glucose treatment. 
