1 National Key Laboratory of Wheat Improvement, Key Laboratory of Crop Water Physiology and Drought-Tolerance Germplasm Improvement, Ministry of Agriculture and Rural Affairs, College of Agronomy, Shandong Agricultural University, Tai'an, PR China
2 Department of Agricultural Soil Science, Department of Soil Science of Temperate Ecosystems, University of Gottingen, Gottingen 37077, Germany
3 Peoples Friendship University of Russia (RUDN University), 117198 Moscow, Russia
4 Institute of Environmental Sciences, Kazan Federal University, 420049 Kazan, Russia