Continuous biosolids application affects grain elemental concentrations in a dryland-wheat agroecosystem |
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| Authors: | KA Barbarick JA Ippolito |
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| Institution: | 1. Department of Soil and Crop Sciences, Colorado State University, 200 W. Lake Street, Fort Collins, CO 80523-1170, United States;2. USDA-ARS-NWISRL, 3793 North 3600 East, Kimberly, ID 83341-5076, United States;1. Leibniz Universität Hannover, Institute of Horticultural Production Systems, 30419 Hannover, Germany;2. Forschungszentrum Jülich, Institute of Bio- and Geosciences – Agrosphere (IBG-3), 52425 Jülich, Germany;3. Department of Plant Systems Biology, Vlaams Instituut voor Biotechnologie (VIB), 9052 Gent, Belgium;4. Department of Plant Biotechnology and Bioinformatics, Ghent University, 9052 Gent, Belgium;1. Energy, Environment and Water Research Centre (EEWRC), The Cyprus Institute, Nicosia, 2121, Cyprus;2. Computation-based Science and Technology Research Centre (CaSToRC), The Cyprus Institute, Nicosia, 2121, Cyprus;3. Max Planck Institute for Chemistry, Mainz, 55128, Germany;1. School of Environment and Natural Resources, Renmin University of China, Haidian, Beijing 100872, China;2. Research Institute of Chemical Defense, Beijing 102205, China;3. School of Environment, Tsinghua University, Haidian, Beijing 100084, China;1. Silviculture and Forest Ecological Studies, Hokkaido University, Sapporo 060-8689, Japan;2. Institute of Agriculture, Tokyo University of Agriculture and Technology, Fuchu 183-8509, Japan;3. Department of Plant Ecology, Forestry and Forest Products Research Institute, Tsukuba 305-8687, Japan;4. Ecophysiology of Plants, Technische Universität München, Von-Carlowitz-Platz 2, D-85354 Freising, Germany;1. State Key Laboratory of Pollution Control and Resource Reuse, Key Laboratory of Yangtze River Water Environment, Ministry of Education, College of Environmental Science and Engineering, Tongji University, Shanghai 200092, PR China;2. College of Biological, Chemical Sciences and Engineering, Jiaxing University, Jiaxing, Zhejiang 314001, PR China;3. College of Resources and Environment, Qingdao Agricultural University, Qingdao, Shandong 266109, PR China |
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| Abstract: | Continuous land application of biosolids in a beneficial-use program changes trace-element availability to plants over time. Consequently, what regression model, if any, could best predict wheat (Triticum aestivum L.) grain concentrations in a biosolids-amended dryland agroecosystem? We calculated paraboloid, linear, quadratic, and exponential-rise-to-a maximum equations for grain Ba, Cd, Cu, Mn, Mo, Ni, P, and Zn concentration versus number of biosolids applications and/or soil NH4HCO3-dithethylenetriaminepentaacetic acid (AB-DTPA) extract concentrations for two sites that had each received six applications of Littleton/Englewood, CO, USA Wastewater Treatment Facility biosolids. The paraboloid-regression models were superior (higher R2 values, lower S.E. of the estimate) to other models. Soils classified the same as the Weld soil (used in this study) at the family level (fine, smectitic, mesic Aridic Argiustolls) encompass 25 soil series in 10 US states with an aerial extent of 2.3 × 106 ha. The paraboloid-regression model approach probably would be applicable to these similarly classified soils. |
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