Nitrogen fertilization reduces the capacity of soils to take up atmospheric carbonyl sulphide
Language
en
Article de revue
This item was published in
Soil Systems. 2018, vol. 2, n° 4, p. 1-18
MDPI
English Abstract
Soils are an important carbonyl sulphide (COS) sink. However, they can also act as sources of COS to the atmosphere. Here we demonstrate that variability in the soil COS sink and source strength is strongly linked to the ...Read more >
Soils are an important carbonyl sulphide (COS) sink. However, they can also act as sources of COS to the atmosphere. Here we demonstrate that variability in the soil COS sink and source strength is strongly linked to the available soil inorganic nitrogen (N) content across a diverse range of biomes in Europe. We revealed in controlled laboratory experiments that a one-off addition of ammonium nitrate systematically decreased the COS uptake rate whilst simultaneously increasing the COS production rate of soils from boreal and temperate sites in Europe. Furthermore, we found strong links between variations in the two gross COS fluxes, microbial biomass, and nitrate and ammonium contents, providing new insights into the mechanisms involved. Our findings provide evidence for how the soil-atmosphere exchange of COS is likely to vary spatially and temporally, a necessary step for constraining the role of soils and land use in the COS mass budget.Read less <
Keywords
COS production
nitrate
English Keywords
COS uptake
carbonic anhydrase
ammonium
sulfur
microbial community
European Project
Carbonic anhydrase: where the CO2, COS and H2O cycles meet
Origin
Hal imported