caa a22 4500 606220194 CHVBK 20210128101122.0 cr unu---uuuuu 210128e20150801xx s 000 0 eng 10.1007/s11104-015-2455-z doi (NATIONALLICENCE)springer-10.1007/s11104-015-2455-z Combining δ13C measurements and ERT imaging: improving our understanding of competition at the crop-soil-hedge interface [Elektronische Daten] [Khalid Hussain, Chalermchart Wongleecharoen, Thomas Hilger, Jan Vanderborght, Sarah Garré, Wattanai Onsamrarn, Marc-André Sparke, Jan Diels, Thanuchai Kongkaew, Georg Cadisch] Background and aims: Hedgerow cropping decreases erosion in hillside agriculture but also competes for water and nutrients with crops. This study combined two methods for an improved understanding of water and nutrient competition at the crop-soil-hedge interface. Methods: δ13C isotopic discrimination in plants and soil electrical resistivity tomography (ERT) imaging were used in a field trial with maize monocropping (MM) vs. leucaena hedgerow intercropping with and without fertilizer (MHF+ and MHF−) in Thailand. Results: Hedges significantly reduced maize grain yield and aboveground biomass in rows close to hedgerows. ERT revealed water depletion was stronger in MM than in MHF+ and MHF- confirming time domain reflectometry and leaf area data. In MHF+, water depletion was higher in maize rows close to the hedge compared to rows distant to hedges and maize grain δ13C was significantly less negative in rows close to hedges (-10.33‰) compared to distant ones (-10.64‰). Lack of N increased grain δ13C in MHF- (-9.32‰, p ≤ 0.001). Both methods were correlated with each other (r = 0.66, p ≤ 0.001). Combining ERT with grain δ13C and %N allowed identifying that maize growth close to hedges was limited by N and not by water supply. Conclusion: Combining ERT imaging and 13C isotopic discrimination approaches improved the understanding of spatial-temporal patterns of competition at the hedge-soil-crop interface and allowed distinguishing between water and N competition in maize based hedgerow systems. Springer International Publishing Switzerland, 2015 Alley cropping nationallicence Competition nationallicence ERT imaging nationallicence N nationallicence Soil water nationallicence Stable isotope discrimination nationallicence Thailand nationallicence Hussain Khalid Institute of Plant Production and Agroecology in the Tropics and Subtropics, University of Hohenheim, 70593, Stuttgart, Germany aut Wongleecharoen Chalermchart Institute of Plant Production and Agroecology in the Tropics and Subtropics, University of Hohenheim, 70593, Stuttgart, Germany aut Hilger Thomas Institute of Plant Production and Agroecology in the Tropics and Subtropics, University of Hohenheim, 70593, Stuttgart, Germany aut Vanderborght Jan Forschungszentrum Jülich GmbH, Agrosphere Institute IBG-3, 52425, Jülich, Germany aut Garré Sarah Gembloux Agro-Bio Tech, Passage des Déportés 2, 5030, Gembloux, Belgium aut Onsamrarn Wattanai Department of Soil Science, Kasetsart University, Bangkok, Thailand aut Sparke Marc-André Institute of Plant Production and Agroecology in the Tropics and Subtropics, University of Hohenheim, 70593, Stuttgart, Germany aut Diels Jan Department of Earth and Environmental Sciences, KU Leuven, Celestijnenlaan 200E, 3001, Leuven, Belgium aut Kongkaew Thanuchai Department of Soil Science, Kasetsart University, Bangkok, Thailand aut Cadisch Georg Institute of Plant Production and Agroecology in the Tropics and Subtropics, University of Hohenheim, 70593, Stuttgart, Germany aut Plant and Soil Springer International Publishing 393/1-2(2015-08-01), 1-20 0032-079X 393:1-2<1 2015 393 11104 https://doi.org/10.1007/s11104-015-2455-z 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/s11104-015-2455-z text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Hussain Khalid Institute of Plant Production and Agroecology in the Tropics and Subtropics, University of Hohenheim, 70593, Stuttgart, Germany aut NATIONALLICENCE 700 1- Wongleecharoen Chalermchart Institute of Plant Production and Agroecology in the Tropics and Subtropics, University of Hohenheim, 70593, Stuttgart, Germany aut NATIONALLICENCE 700 1- Hilger Thomas Institute of Plant Production and Agroecology in the Tropics and Subtropics, University of Hohenheim, 70593, Stuttgart, Germany aut NATIONALLICENCE 700 1- Vanderborght Jan Forschungszentrum Jülich GmbH, Agrosphere Institute IBG-3, 52425, Jülich, Germany aut NATIONALLICENCE 700 1- Garré Sarah Gembloux Agro-Bio Tech, Passage des Déportés 2, 5030, Gembloux, Belgium aut NATIONALLICENCE 700 1- Onsamrarn Wattanai Department of Soil Science, Kasetsart University, Bangkok, Thailand aut NATIONALLICENCE 700 1- Sparke Marc-André Institute of Plant Production and Agroecology in the Tropics and Subtropics, University of Hohenheim, 70593, Stuttgart, Germany aut NATIONALLICENCE 700 1- Diels Jan Department of Earth and Environmental Sciences, KU Leuven, Celestijnenlaan 200E, 3001, Leuven, Belgium aut NATIONALLICENCE 700 1- Kongkaew Thanuchai Department of Soil Science, Kasetsart University, Bangkok, Thailand aut NATIONALLICENCE 700 1- Cadisch Georg Institute of Plant Production and Agroecology in the Tropics and Subtropics, University of Hohenheim, 70593, Stuttgart, Germany aut NATIONALLICENCE 773 0- Plant and Soil Springer International Publishing 393/1-2(2015-08-01), 1-20 0032-079X 393:1-2<1 2015 393 11104