caa a22 4500 606219153 CHVBK 20210128101116.0 cr unu---uuuuu 210128e20150601xx s 000 0 eng 10.1007/s11104-015-2429-1 doi (NATIONALLICENCE)springer-10.1007/s11104-015-2429-1 The role of pebbles in the water dynamics of a stony soil cultivated with young poplars [Elektronische Daten] [Marion Tetegan, Nathalie Korboulewsky, Alain Bouthier, Anatja Samouëlian, Isabelle Cousin] Background and aims: Stony soils are widespread and often support plant production; nevertheless, their physical properties remain poorly understood, particularly regarding the role of rock fragments in plant water uptake. Understanding the hydric interactions between rock fragments and fine earth in stony soils remains central to water management in the context of climate change. Methods: A soil water retention curve of stony soil was developed based on a water retention curve for both rock fragments and fine earth. Water transfer between fine earth, rock fragment and plant roots was monitored during experiments under controlled evaporation conditions. Results: During desiccation, the water retention curves for fine earth and rock fragments exhibited water movement from the rock fragment to the fine earth. During our evaporation experiment, fine earth water content decreased as soon as desiccation started, whereas the rock fragments released water after several days. We demonstrated that rock fragments are a water reservoir for plants; plants can uptake water directly from pebbles or after it is transferred into surrounding fine earth. However, this transfer could not be measured due to the non-equilibrium state between the two phases. Furthermore, we exhibited how the water potential dynamics in fine earth containers cultivated with poplar was not influenced by the rock fragments content. Conclusion: Water in rock fragments can be directly released to plants or released through fine earth, thereby reducing plant water stress during moderate drought periods. Therefore, the assumption that rock fragments constitute an inert phase inhibiting ecological soil functions must be completely reconsidered. Springer International Publishing Switzerland, 2015 Rock fragments nationallicence Fine earth nationallicence Desiccation nationallicence Water retention curve nationallicence Water exchange nationallicence Tetegan Marion INRA, UR 0272 Science du Sol, Centre de recherche d'Orléans, 2163 Avenue de la Pomme de Pin, CS 40001 Ardon, 45075, Orléans Cedex 02, France aut Korboulewsky Nathalie Irstea, UR EFNO Ecosystèmes Forestiers, 45290, Nogent-sur-Vernisson, Centre de Nogent-sur-Vernisson, France aut Bouthier Alain Arvalis - Institut du Végétal, Domaine Expérimental du Magneraud, 17700, Saint Pierre d'Amilly, France aut Samouëlian Anatja INRA, UMR 1221 LISAH (INRA-IRD-SupAgro), 2 place pierre Viala, 34060, Montpellier, France aut Cousin Isabelle INRA, UR 0272 Science du Sol, Centre de recherche d'Orléans, 2163 Avenue de la Pomme de Pin, CS 40001 Ardon, 45075, Orléans Cedex 02, France aut Plant and Soil Springer International Publishing 391/1-2(2015-06-01), 307-320 0032-079X 391:1-2<307 2015 391 11104 https://doi.org/10.1007/s11104-015-2429-1 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/s11104-015-2429-1 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Tetegan Marion INRA, UR 0272 Science du Sol, Centre de recherche d'Orléans, 2163 Avenue de la Pomme de Pin, CS 40001 Ardon, 45075, Orléans Cedex 02, France aut NATIONALLICENCE 700 1- Korboulewsky Nathalie Irstea, UR EFNO Ecosystèmes Forestiers, 45290, Nogent-sur-Vernisson, Centre de Nogent-sur-Vernisson, France aut NATIONALLICENCE 700 1- Bouthier Alain Arvalis - Institut du Végétal, Domaine Expérimental du Magneraud, 17700, Saint Pierre d'Amilly, France aut NATIONALLICENCE 700 1- Samouëlian Anatja INRA, UMR 1221 LISAH (INRA-IRD-SupAgro), 2 place pierre Viala, 34060, Montpellier, France aut NATIONALLICENCE 700 1- Cousin Isabelle INRA, UR 0272 Science du Sol, Centre de recherche d'Orléans, 2163 Avenue de la Pomme de Pin, CS 40001 Ardon, 45075, Orléans Cedex 02, France aut NATIONALLICENCE 773 0- Plant and Soil Springer International Publishing 391/1-2(2015-06-01), 307-320 0032-079X 391:1-2<307 2015 391 11104