Yi, B.; Lu, F.; Chen, X.; Zhang, J.; Ma, J.-X.; Chang, A.; Bu, Z.-J. The Effect of Warming-Amplified Phosphorus Addition on a Peatland’s N2O Emissions. Agronomy2023, 13, 2947.
Yi, B.; Lu, F.; Chen, X.; Zhang, J.; Ma, J.-X.; Chang, A.; Bu, Z.-J. The Effect of Warming-Amplified Phosphorus Addition on a Peatland’s N2O Emissions. Agronomy 2023, 13, 2947.
Yi, B.; Lu, F.; Chen, X.; Zhang, J.; Ma, J.-X.; Chang, A.; Bu, Z.-J. The Effect of Warming-Amplified Phosphorus Addition on a Peatland’s N2O Emissions. Agronomy2023, 13, 2947.
Yi, B.; Lu, F.; Chen, X.; Zhang, J.; Ma, J.-X.; Chang, A.; Bu, Z.-J. The Effect of Warming-Amplified Phosphorus Addition on a Peatland’s N2O Emissions. Agronomy 2023, 13, 2947.
Abstract
Natural montane peatlands generally are not a significant source of nitrous oxide (N2O) due to environment limitation including phosphorus (P) scarcity and temperature lowness. Phosphorus enrichment and warming caused by global change are altering this limitation, likely to increase the source function of N2O. However, the combined effects of P addition and warming on N2O fluxes and biotic/abiotic factor in peatlands are still uncertain. To address this, we investigated the long-term (12 yrs) effects of P addition (5 and 10 kg ha-1 yr-1) and its interaction with warming on N2O fluxes in a peatland. The results showed that although long-term P addition did not significantly affect the source/sink function of N2O in the peatland, it stimulated enzyme activities, promoted peat decomposition. However, warming amplified the effect of P addition to increase N2O emissions by stimulating enzyme activities and changing soil stoichiometry, even turned the peatland into a significant source of N2O with an emission of approximate 100 g m-2 during the growing season. Our study suggests that P enrichment under the current background of global warming will enhance the possibility of strong N2O emissions in montane peatlands, which may increase the risk to further aggravate global warming.
Keywords
enzyme activities; Changbai mountains; global change
Subject
Environmental and Earth Sciences, Geography
Copyright:
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