title: Insights into complexation of dissolved organic matter and Al(III) and nanominerals formation in soils under contrasting fertilizations using two-dimensional correlation spectroscopy and high resolution-transmission electron microscopy techniques.
abstract: Understanding the organomineral associations in soils is of great importance. Using two-dimensional correlation spectroscopy (2DCOS) and high resolution-transmission electron microscopy (HRTEM) techniques, this study compared the binding characteristics of organic ligands to Al(III) in dissolved organic matter (DOM) from soils under short-term (3-years) and long-term (22-years) fertilizations. Three fertilization treatments were examined: (i) no fertilization (Control), (ii) chemical nitrogen, phosphorus and potassium (NPK), and (iii) NPK plus swine manure (NPKM). Soil spectra detected by the 2DCOS Fourier transform infrared (FTIR) spectroscopy showed that fertilization modified the binding characteristics of organic ligands to Al(III) in soil DOM at both short- and long- term location sites. The CH deformations in aliphatic groups played an important role in binding to Al(III) but with minor differences among the Control, NPK and NPKM at the short-term site. While at the long-term site both C-O stretching of polysaccharides or polysaccharide-like substances and aliphatic O-H were bound to Al(III) under the Control, whereas only aliphatic O-H, and only polysaccharides and silicates, were bound to Al(III) under NPK and NPKM, respectively. Images from HRTEM demonstrated that crystalline nanominerals, composed of Fe and O, were predominant in soil DOM under NPK, while amorphous nanominerals, predominant in Al, Si, and O, were dominant in soil DOM under Control and NPKM. In conclusion, fertilization strategies, especially under long-term, could affect the binding of organic ligands to Al(III) in soil DOM, which resulted in alterations in the turnover, reactivity, and bioavailability of soil organic matter. Our results demonstrated that the FTIR-2DCOS combined with HRTEM techniques could enhance our understanding in the binding characteristics of DOM to Al(III) and the resulted nanominerals in soils.
authors.affiliation: National Engineering Research Center for Organic-Based Fertilizers, Nanjing Agricultural University, Nanjing 210095, China; Jiangsu Collaborative Innovation Center for Solid Organic Waste Utilization, Nanjing Agricultural University, Nanjing 210095, China.
authors.forename: Yongli
authors.initials: Y
authors.lastname: Wen
authors.affiliation: National Engineering Research Center for Organic-Based Fertilizers, Nanjing Agricultural University, Nanjing 210095, China; Jiangsu Collaborative Innovation Center for Solid Organic Waste Utilization, Nanjing Agricultural University, Nanjing 210095, China.
authors.forename: Huan
authors.initials: H
authors.lastname: Li
authors.affiliation: National Engineering Research Center for Organic-Based Fertilizers, Nanjing Agricultural University, Nanjing 210095, China; Jiangsu Collaborative Innovation Center for Solid Organic Waste Utilization, Nanjing Agricultural University, Nanjing 210095, China.
authors.forename: Jian
authors.initials: J
authors.lastname: Xiao
authors.affiliation: National Engineering Research Center for Organic-Based Fertilizers, Nanjing Agricultural University, Nanjing 210095, China; Jiangsu Collaborative Innovation Center for Solid Organic Waste Utilization, Nanjing Agricultural University, Nanjing 210095, China.
authors.forename: Chang
authors.initials: C
authors.lastname: Wang
authors.affiliation: National Engineering Research Center for Organic-Based Fertilizers, Nanjing Agricultural University, Nanjing 210095, China; Jiangsu Collaborative Innovation Center for Solid Organic Waste Utilization, Nanjing Agricultural University, Nanjing 210095, China.
authors.forename: Qirong
authors.initials: Q
authors.lastname: Shen
authors.affiliation: National Engineering Research Center for Organic-Based Fertilizers, Nanjing Agricultural University, Nanjing 210095, China; Jiangsu Collaborative Innovation Center for Solid Organic Waste Utilization, Nanjing Agricultural University, Nanjing 210095, China.
authors.forename: Wei
authors.initials: W
authors.lastname: Ran
authors.affiliation: NSW Department of Primary Industries, West Pennant Hills, NSW 2125, Australia; School of Plant Biology, University of Western Australia, Crawley, WA 6009, Australia.
authors.forename: Xinhua
authors.initials: X
authors.lastname: He
authors.affiliation: National Engineering Research Center for Organic-Based Fertilizers, Nanjing Agricultural University, Nanjing 210095, China; Jiangsu Collaborative Innovation Center for Solid Organic Waste Utilization, Nanjing Agricultural University, Nanjing 210095, China.
authors.forename: Quansuo
authors.initials: Q
authors.lastname: Zhou
authors.affiliation: National Engineering Research Center for Organic-Based Fertilizers, Nanjing Agricultural University, Nanjing 210095, China; Jiangsu Collaborative Innovation Center for Solid Organic Waste Utilization, Nanjing Agricultural University, Nanjing 210095, China; State Key Laboratory of Lake Science and Environment, Nanjing Institute of Geography and Limnology, Chinese Academy of Sciences, Nanjing 210008, China. Electronic address: yuguanghui@njau.edu.cn.
authors.forename: Guanghui
authors.initials: G
authors.lastname: Yu
mesh_terms: D000535:Aluminum / Q000737:chemistry*; D000818:Animals; D004784:Environmental Monitoring; D052918:Environmental Restoration and Remediation; D008372:Manure; D046529:Microscopy, Electron, Transmission; D049329:Nanostructures / Q000737:chemistry*; D009584:Nitrogen / Q000737:chemistry; D010758:Phosphorus / Q000737:chemistry; D011188:Potassium / Q000737:chemistry; D025341:Principal Component Analysis; D012987:Soil / Q000737:chemistry*; D017550:Spectroscopy, Fourier Transform Infrared; D013552:Swine; D013997:Time Factors
chemical_list: D008372:Manure; D012987:Soil; D010758:Phosphorus; D000535:Aluminum; D009584:Nitrogen; D011188:Potassium
keywords: Dissolved organic matter; Fertilization strategies; Fourier transform infrared (FTIR) spectroscopy; High resolution-transmission electron microscopy (HRTEM); Soil nanomineral; Two-dimensional correlation (2DCOS) spectroscopy