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Biogeosciences An interactive open-access journal of the European Geosciences Union
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Volume 13, issue 19
Biogeosciences, 13, 5609–5617, 2016
https://doi.org/10.5194/bg-13-5609-2016
© Author(s) 2016. This work is distributed under
the Creative Commons Attribution 3.0 License.
Biogeosciences, 13, 5609–5617, 2016
https://doi.org/10.5194/bg-13-5609-2016
© Author(s) 2016. This work is distributed under
the Creative Commons Attribution 3.0 License.

Research article 07 Oct 2016

Research article | 07 Oct 2016

Effect of iron oxide on nitrification in two agricultural soils with different pH

Xueru Huang et al.

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The effect of Fe oxide on N transformation processes were different in soils as a function of pH. 15N-labelled ammonium and nitrate were used separately to determine N transformation rates combined with Fe oxide (ferrihydrite) addition. Iron oxide addition stimulated net nitrification in the low-pH soil (pH 5.1), while the opposite occurred in the high-pH soil (pH 7.8). Fe oxide increased NH3-N availability by stimulating N mineralization and inhibiting N immobilization at low pH.
The effect of Fe oxide on N transformation processes were different in soils as a function of...
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