caa a22 4500 606219986 CHVBK 20210128101121.0 cr unu---uuuuu 210128e20150901xx s 000 0 eng 10.1007/s11104-014-2352-x doi (NATIONALLICENCE)springer-10.1007/s11104-014-2352-x Do belowground vertical niche differences between deep- and shallow-rooted species enhance resource uptake and drought resistance in grassland mixtures? [Elektronische Daten] [N. Hoekstra, M. Suter, J. Finn, S. Husse, A. Lüscher] Background and aims: We investigated whether spatial differences in belowground niches between shallow- and deep-rooted species result in increased resource uptake and drought resistance in agricultural grassland communities. Material and methods: We injected the tracers 15N and rubidium (Rb) into the soil and measured tracer uptake from 5 and 35cm soil depth in monocultures and mixtures containing shallow-rooted (Lolium perenne, non-legume; Trifolium repens, legume) and deep-rooted (Cichorium intybus, non-legume; Trifolium pratense, legume) species, grown under drought or control conditions. Results: Deep-rooted species had a higher proportional uptake of both tracers from 35cm soil depth than shallow-rooted species (p < 0.001). Under drought conditions, all species enhanced their proportional tracer uptake from the deeper soil layer (p < 0.004) and species with a high proportional 15N uptake from the deeper soil layer were more drought resistant. Total community uptake of Rb was significantly higher in mixed communities than monocultures (p < 0.007); however, this diversity effect was the result of mixing legumes with non-legumes and not the result of mixing deep- with shallow-rooted species. Conclusions: Clear evidence for spatial niche differences in resource uptake between shallow- and deep-rooted species did not translate into increased resource uptake in mixtures. Resource uptake from deeper soil layers was found to contribute to adaptation and resistance to drought stress. Springer International Publishing Switzerland, 2014 Drought nationallicence Cichorium intybus nationallicence Lolium perenne nationallicence Trifolium pratense nationallicence Trifolium repens nationallicence Diversity nationallicence Rubidium nationallicence 15N nationallicence Tracers nationallicence Hoekstra N. Teagasc, Environment Research Centre, Johnstown Castle, Wexford, Ireland aut Suter M. Agroscope, Institute for Sustainability Sciences ISS, CH-8046, Zürich, Switzerland aut Finn J. Teagasc, Environment Research Centre, Johnstown Castle, Wexford, Ireland aut Husse S. Agroscope, Institute for Sustainability Sciences ISS, CH-8046, Zürich, Switzerland aut Lüscher A. Agroscope, Institute for Sustainability Sciences ISS, CH-8046, Zürich, Switzerland aut Plant and Soil Springer International Publishing 394/1-2(2015-09-01), 21-34 0032-079X 394:1-2<21 2015 394 11104 https://doi.org/10.1007/s11104-014-2352-x text/html Onlinezugriff via DOI BK010053 XK010053 XK010000 Metadata rights reserved Springer special CC-BY-NC licence nationallicence 1 research-article jats NATIONALLICENCE NATIONALLICENCE NL-springer NATIONALLICENCE 856 40 https://doi.org/10.1007/s11104-014-2352-x text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Hoekstra N. Teagasc, Environment Research Centre, Johnstown Castle, Wexford, Ireland aut NATIONALLICENCE 700 1- Suter M. Agroscope, Institute for Sustainability Sciences ISS, CH-8046, Zürich, Switzerland aut NATIONALLICENCE 700 1- Finn J. Teagasc, Environment Research Centre, Johnstown Castle, Wexford, Ireland aut NATIONALLICENCE 700 1- Husse S. Agroscope, Institute for Sustainability Sciences ISS, CH-8046, Zürich, Switzerland aut NATIONALLICENCE 700 1- Lüscher A. Agroscope, Institute for Sustainability Sciences ISS, CH-8046, Zürich, Switzerland aut NATIONALLICENCE 773 0- Plant and Soil Springer International Publishing 394/1-2(2015-09-01), 21-34 0032-079X 394:1-2<21 2015 394 11104