Abstract
The spatial in situ variability of soil N2O emissions (measured by micro-chambers, radius 0.033 m), N2O content, water content, NO3 –, NH4 +, inorganic carbon and organic carbon concentrations was investigated on a silt loam by means of geostatistical methods and nonparametric statistics. The sampling grid consisted of different spacings between sampling points which ranged from 0.1 m to 50 m. There were no significant correlations between N2O emissions and soil parameters (P>0.1) when all the sampling points were considered. In the centre of the grid a "hot area" was localized with significantly higher N2O emissions, and NO3 – and NH4 + concentrations (P≤0.05). Within this hot area the N2O soil content significantly correlated with N2O emissions (P≤0.05). When semiovariograms were computed without data of the hot area samples, N2O emissions showed a weak spatial correlation (range: 4.3 m). The calculations including all data led to pure nugget effects for all parameters except for soil water content (range >40 m) and N2O soil content (range 16.4 m).
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Received: 19 December 1997
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Clemens, J., Schillinger, M., Goldbach, H. et al. Spatial variability of N2O emissions and soil parameters of an arable silt loam – a field study. Biol Fertil Soils 28, 403–406 (1999). https://doi.org/10.1007/s003740050512
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DOI: https://doi.org/10.1007/s003740050512