caa a22 4500 60621965X CHVBK 20210128101119.0 cr unu---uuuuu 210128e20150101xx s 000 0 eng 10.1007/s11104-014-2249-8 doi (NATIONALLICENCE)springer-10.1007/s11104-014-2249-8 Wheat root growth responses to horizontal stratification of fertiliser in a water-limited environment [Elektronische Daten] [Kemo Jin, Jianbo Shen, Rhys Ashton, Rodger White, Ian Dodd, Martin Parry, William Whalley] Background and aims: We were interested to determine the effects of horizontal stratification of nutrient-rich zones within different layers of the soil profile in water-limited environments on root growth and crop yield. This is practically relevant to large areas of China, many of which have been over-fertilized. Methods: We used soil-filled rhizotrons 1.4m deep to grow wheat. Three different nutrient-rich horizontal stratifications were used at depths of 0-40, 60-100 and 0-140cm. The soil was packed to a density of 1.5gcm−3, at a matric potential of −10 kPa. The wheat was grown until it was at terminal drought. Low soil hydraulic conductance preserved the horizontal nutrient stratification. Results: Plants grown in rhizotrons with a surface layer (0-40cm) of nutrients had the greatest root growth, water uptake and yield. When nutrients were uniformly distributed throughout the rhizotron (0-140cm), root growth was restricted to the surface layer. Measurements of soil moisture indicate this was because the roots became impeded. Conclusions: Nutrient enrichment of the surface layer was the most effective at promoting deep roots, higher water uptake and yield under water-limited conditions. Heterogeneous nutrient distribution can modify root growth and water uptake. The Author(s), 2014 Root proliferation nationallicence Water-limited nationallicence Horizontal nutrient stratification nationallicence Wheat nationallicence Jin Kemo Department of Plant Nutrition, College of Resource and Environmental Sciences, China Agricultural University, 100193, Beijing, China aut Shen Jianbo Department of Plant Nutrition, College of Resource and Environmental Sciences, China Agricultural University, 100193, Beijing, China aut Ashton Rhys Rothamsted Research, West Common, Harpenden, AL5 2JQ, St Albans, UK aut White Rodger Rothamsted Research, West Common, Harpenden, AL5 2JQ, St Albans, UK aut Dodd Ian The Lancaster Environment Centre, LA1 4YQ, Lancaster University, UK aut Parry Martin Rothamsted Research, West Common, Harpenden, AL5 2JQ, St Albans, UK aut Whalley William Rothamsted Research, West Common, Harpenden, AL5 2JQ, St Albans, UK aut Plant and Soil Springer International Publishing 386/1-2(2015-01-01), 77-88 0032-079X 386:1-2<77 2015 386 11104 https://doi.org/10.1007/s11104-014-2249-8 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/s11104-014-2249-8 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Jin Kemo Department of Plant Nutrition, College of Resource and Environmental Sciences, China Agricultural University, 100193, Beijing, China aut NATIONALLICENCE 700 1- Shen Jianbo Department of Plant Nutrition, College of Resource and Environmental Sciences, China Agricultural University, 100193, Beijing, China aut NATIONALLICENCE 700 1- Ashton Rhys Rothamsted Research, West Common, Harpenden, AL5 2JQ, St Albans, UK aut NATIONALLICENCE 700 1- White Rodger Rothamsted Research, West Common, Harpenden, AL5 2JQ, St Albans, UK aut NATIONALLICENCE 700 1- Dodd Ian The Lancaster Environment Centre, LA1 4YQ, Lancaster University, UK aut NATIONALLICENCE 700 1- Parry Martin Rothamsted Research, West Common, Harpenden, AL5 2JQ, St Albans, UK aut NATIONALLICENCE 700 1- Whalley William Rothamsted Research, West Common, Harpenden, AL5 2JQ, St Albans, UK aut NATIONALLICENCE 773 0- Plant and Soil Springer International Publishing 386/1-2(2015-01-01), 77-88 0032-079X 386:1-2<77 2015 386 11104