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Priming effect of biuret addition on native soil N mineralisation under laboratory conditions |
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| Authors: | J.M. Xue R. Sands T.W. Payn |
| Affiliation: | a New Zealand Forest Research, P.O. Box 29237, Christchurch, New Zealand b School of Forestry, University of Canterbury, Private Bag 4800, Christchurch, New Zealand c New Zealand Forest Research, Private Bag 3020, Rotorua, New Zealand |
| Abstract: | This study was carried out to quantify the priming effect of biuret on native soil nitrogen (N) mineralisation during a 112-day incubation. Addition of biuret (100 mg 15N-labelled biuret kg−1 soil) increased the turnover rate constant of soil organic matter and had a positive priming effect on native soil N mineralisation in two soils. The additional mineralisation was 0.65% of the total soil N (equivalent to 47.1 kg N ha−1) in a sandy loam soil and 0.62% of the soil N (equivalent to 46.5 kg N ha−1) in a silt loam soil. |
| Keywords: | Net N mineralisation Priming effect 15N-biuret Native soil N |
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