%0 Journal article
%A Guo, Yafei
%A Becker‐Fazekas, Stefan
%A Mühling, Karl H.
%T Impact of different chloride salts and their concentrations on nitrification and trace gas emissions from a sandy soil under a controlled environment
%R 10.23689/fidgeo-4287
%J Soil Use and Management

%X Potassium chloride (KCl) and magnesium chloride (MgCl2) can be used to reduce carbon dioxide (CO2) and nitrous oxide (N2O) emissions, but their efficacy can be strongly affected by their Cl− concentration. This study aimed to compare the behaviour of different Cl− salts and concentrations with that of a typical commercial nitrification inhibitor (3, 4‐dimethylpyrazole phosphate, PIADIN). KCl, MgCl2 and PIADIN were investigated under a laboratory incubation experiment for two months. KCl and MgCl2 were applied at 0.5 and 1.0 g kg−1, while PIADIN was applied at 25 mg kg−1 soil. CO2 and N2O concentrations were analysed during the incubation period. The NH4+ and NO3‐ dynamics in soil were also measured. The results showed 0.5 and 1.0 g kg−1 KCl and 0.5 g kg−1 MgCl2 decreased CO2‐C emissions by 43%–46% and increased N2O‐N emissions by 15%–48%, whereas 1.0 g kg−1 MgCl2 decreased CO2‐C emissions by 72% and N2O‐N emissions by 19%. KCl and MgCl2 retarded the decrease of the NH4+‐N concentration and increase of the NO3‐‐N concentration. PIADIN reduced the emissions of CO2‐C by 113% and N2O‐N by 97% and maintained a high soil NH4+‐N concentration and low NO3‐‐N concentration. MgCl2 addition at 1.0 g kg−1 was an effective treatment as the Mg both fertilized the soil and inhibited CO2‐C and N2O‐N emissions. Moreover, 1.0 g kg−1 MgCl2 could retard soil nitrification, the decrease of NH4+‐N concentration and the increase of NO3‐‐N concentration. While PIADIN had no fertilizing value, it was a more effective nitrification inhibitor than Cl− salts.
%U http://resolver.sub.uni-goettingen.de/purl?gldocs-11858/8633
%~  FID GEO-LEO e-docs