Publication Details

Category Text Publication
Reference Category Journals
DOI 10.1007/s10533-016-0283-8
Document Shareable Link
Title (Primary) Mechanisms behind plant diversity effects on inorganic and organic N leaching from temperate grassland
Author Leimer, S.; Oelmann, Y.; Eisenhauer, N.; Milcu, A.; Roscher, C.; Scheu, S.; Weigelt, A.; Wirth, C.; Wilcke, W.
Source Titel Biogeochemistry
Year 2016
Department iDiv; PHYDIV
Volume 131
Issue 3
Page From 339
Page To 353
Language englisch
Keywords The Jena Experiment; Biodiversity; DON leaching; Ammonium leaching; TDN leaching; Land-use change
UFZ wide themes RU1
Abstract Higher plant diversity reduces nitrate leaching by complementary resource use, while its relation to leaching of other N species is unclear. We determined the effects of plant species richness, functional group richness, and the presence of specific functional groups on ammonium, dissolved organic N (DON), and total dissolved N (TDN) leaching from grassland in the first 4 years after conversion from fertilized arable land to unfertilized grassland. On 62 experimental plots in Jena, Germany, with 1–60 plant species and 1–4 functional groups (legumes, grasses, tall herbs, small herbs), nitrate, ammonium, and TDN concentrations in soil solution (0–0.3 m soil layer) were measured fortnightly during 4 years. DON concentrations were calculated by subtracting inorganic N from TDN. Nitrogen concentrations were multiplied with modeled downward water fluxes to obtain N leaching. DON leaching contributed most to TDN leaching (64 ± SD 4% of TDN). Ammonium leaching was unaffected by plant diversity. Increasing species richness decreased DON leaching in the fourth year. We attribute this finding to enhanced use of DON as a C and N source and enhanced mineralization of DON by soil microorganisms. An increase of species richness decreased TDN leaching likely driven by the complementary use of nitrate by diverse mixtures. Legumes increased DON and TDN leaching likely because of their N2-fixing ability and higher litter production. Grasses decreased TDN leaching because of more exhaustive
use of nitrate and
water. Our results demonstrate that increasing plant species richness decreases leaching
of DON and TDN.
Persistent UFZ Identifier
Leimer, S., Oelmann, Y., Eisenhauer, N., Milcu, A., Roscher, C., Scheu, S., Weigelt, A., Wirth, C., Wilcke, W. (2016):
Mechanisms behind plant diversity effects on inorganic and organic N leaching from temperate grassland
Biogeochemistry 131 (3), 339 - 353 10.1007/s10533-016-0283-8