
TY  - JOUR
A1  - Barkle, G. F. 
A1  - Stenger, R. 
A1  - Sparling, G. P. 
A1  - Painter, D. J. 
T1  - Immobilisation and mineralisation of carbon and nitrogen from dairy farm effluent during laboratory soil incubations
JF  - Soil Research
JO  - Soil Res.
Y1  - 2001
VL  - 39
IS  - 6
SP  - 1407
EP  - 1417
KW  - Net nitrogen mineralisation, CO2, glucose, microbial biomass, inorganic nitrogen.
UR  - https://doi.org/10.1071/SR00084 
N2  - 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. 
ER  -

