caa a22 4500 606219803 CHVBK 20210128101120.0 cr unu---uuuuu 210128e20150101xx s 000 0 eng 10.1007/s11104-014-2262-y doi (NATIONALLICENCE)springer-10.1007/s11104-014-2262-y Chloride concentration distribution under oak hedgerow: an indicator of the water-uptake zone of tree roots? [Elektronische Daten] [Hongtao Hao, Catherine Grimaldi, Christian Walter, Gilles Dutin, Beatrice Trinkler, Philippe Merot] Aims: In agroforestry systems, root activity of trees may either reduce nutrient leaching beneath neighboring crops or compete with them. A previous study reveals high chloride (Cl) accumulation in the soil under a bottomland oak hedgerow in western France. Our study tests whether Cl can be used as an indicator of the spatial extent of tree root activity. Methods: Cl was analyzed in soil profiles up to 2m deep along transects perpendicular to hedgerows. One site was explored in detail to examine the role of hedgerow position on the slope, supplemented with multi-annual and multi-site studies on bottomland hedgerows. Results: Upslope Cl accumulation was highest near the tree line (and up to 6m away) and around 1m deep. Downslope it extended up to 18m from the tree line and near the surface. This difference was caused by differences in water availability or physical soil constraints. Cl accumulation was found in both temporal (multi-annual) and spatial (multi-site) studies. Conclusions: Cl accumulation under oak hedgerows can be used to identify the lateral extent and depth of water uptake by roots. It results from root activity over many years. The method is more suitable for poorly drained soils. Springer International Publishing Switzerland, 2014 Agroforestry nationallicence Hedgerow landscape nationallicence Root activity nationallicence Root distribution nationallicence Soil water nationallicence Transpiration nationallicence Hao Hongtao INRA, UMR1069 Sol Agro et hydrosystème Spatialisation, F-35000, Rennes, France aut Grimaldi Catherine INRA, UMR1069 Sol Agro et hydrosystème Spatialisation, F-35000, Rennes, France aut Walter Christian INRA, UMR1069 Sol Agro et hydrosystème Spatialisation, F-35000, Rennes, France aut Dutin Gilles INRA, UMR1069 Sol Agro et hydrosystème Spatialisation, F-35000, Rennes, France aut Trinkler Beatrice INRA, UMR1069 Sol Agro et hydrosystème Spatialisation, F-35000, Rennes, France aut Merot Philippe INRA, UMR1069 Sol Agro et hydrosystème Spatialisation, F-35000, Rennes, France aut Plant and Soil Springer International Publishing 386/1-2(2015-01-01), 357-369 0032-079X 386:1-2<357 2015 386 11104 https://doi.org/10.1007/s11104-014-2262-y 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/s11104-014-2262-y text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Hao Hongtao INRA, UMR1069 Sol Agro et hydrosystème Spatialisation, F-35000, Rennes, France aut NATIONALLICENCE 700 1- Grimaldi Catherine INRA, UMR1069 Sol Agro et hydrosystème Spatialisation, F-35000, Rennes, France aut NATIONALLICENCE 700 1- Walter Christian INRA, UMR1069 Sol Agro et hydrosystème Spatialisation, F-35000, Rennes, France aut NATIONALLICENCE 700 1- Dutin Gilles INRA, UMR1069 Sol Agro et hydrosystème Spatialisation, F-35000, Rennes, France aut NATIONALLICENCE 700 1- Trinkler Beatrice INRA, UMR1069 Sol Agro et hydrosystème Spatialisation, F-35000, Rennes, France aut NATIONALLICENCE 700 1- Merot Philippe INRA, UMR1069 Sol Agro et hydrosystème Spatialisation, F-35000, Rennes, France aut NATIONALLICENCE 773 0- Plant and Soil Springer International Publishing 386/1-2(2015-01-01), 357-369 0032-079X 386:1-2<357 2015 386 11104