caa a22 4500 606219676 CHVBK 20210128101119.0 cr unu---uuuuu 210128e20150101xx s 000 0 eng 10.1007/s11104-014-2266-7 doi (NATIONALLICENCE)springer-10.1007/s11104-014-2266-7 Diffusion and solubility control of fertilizer-applied zinc: chemical assessment and visualization [Elektronische Daten] [Fien Degryse, Roslyn Baird, Mike McLaughlin] Background and aims: Sorption and precipitation reactions reduce the mobility of fertilizer-applied zinc (Zn), and hence reduce availability to plants. Here, we developed a method to visualize diffusion of Zn from fertilizers. Methods: Zinc diffusion was assessed for three fertilizers in three soils of varying pH. The fertilizer (ZnSO4-coated monoammonium phosphate, MAP; ZnSO4-coated diammonium phosphate, DAP; or ZnSO4 alone) was applied in the centre of a Petri dish filled with soil. The Zn diffusion zone was visualized at various incubation times (1, 7 and 18days) by exposing a CaCO3-impregnated filter paper on the soil surface and colouring the Zn captured on the filter paper using dithizone. The extent of diffusion was also assessed through concentric sampling and chemical analysis of soil sections. Results: The visualization results agreed with the chemical analyses and demonstrated the effects of soil properties and fertilizer formulation on Zn diffusion. Combining Zn with P fertilizer restricted its diffusion, particularly with DAP fertilizer or in high pH soils. Solubility considerations indicated that this was due to the formation of Zn phosphate minerals. Conclusions: The visualization method is a useful tool for studying diffusion of Zn from spot applications and allows easy comparison in Zn diffusion between fertilizer sources. Springer International Publishing Switzerland, 2014 Zinc nationallicence Phosphorus nationallicence Fertilizer nationallicence Soil nationallicence Solubility nationallicence Diffusion nationallicence Degryse Fien School of Agriculture, Food and Wine, The University of Adelaide, PMB 1, Waite Campus, 5064, Glen Osmond, SA, Australia aut Baird Roslyn School of Agriculture, Food and Wine, The University of Adelaide, PMB 1, Waite Campus, 5064, Glen Osmond, SA, Australia aut McLaughlin Mike School of Agriculture, Food and Wine, The University of Adelaide, PMB 1, Waite Campus, 5064, Glen Osmond, SA, Australia aut Plant and Soil Springer International Publishing 386/1-2(2015-01-01), 195-204 0032-079X 386:1-2<195 2015 386 11104 https://doi.org/10.1007/s11104-014-2266-7 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/s11104-014-2266-7 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Degryse Fien School of Agriculture, Food and Wine, The University of Adelaide, PMB 1, Waite Campus, 5064, Glen Osmond, SA, Australia aut NATIONALLICENCE 700 1- Baird Roslyn School of Agriculture, Food and Wine, The University of Adelaide, PMB 1, Waite Campus, 5064, Glen Osmond, SA, Australia aut NATIONALLICENCE 700 1- McLaughlin Mike School of Agriculture, Food and Wine, The University of Adelaide, PMB 1, Waite Campus, 5064, Glen Osmond, SA, Australia aut NATIONALLICENCE 773 0- Plant and Soil Springer International Publishing 386/1-2(2015-01-01), 195-204 0032-079X 386:1-2<195 2015 386 11104