Diffusion and solubility control of fertilizer-applied zinc: chemical assessment and visualization

2014

Research organisatons

Trial details

Researcher(s) F Degryse, R Baird and R McLaughlin
Year(s) 2014
Contributor South Australian Research and Development Institute
Trial location(s) Adelaide, SA
Further information View external link
Diffusion and solubility control of fertilizer-applied zinc: chemical assessment and visualization locations
Aims

To develop a method to visualize diffusion of zinc from fertilizers.

Key messages
  • Zinc diffusion was assessed for three fertilizers in three soils of varying pH.
  • The fertilizer (zincSO4-coated monoammonium phosphate, MAP; zincSO4-coated diammonium phosphate, DAP; or zincSO4 alone) was applied in the centre of a Petri dish filled with soil.
  • The zinc diffusion zone was visualized at various incubation times (1, 7 and 18 days) by exposing a CaCO3-impregnated filter paper on the soil surface and colouring the zinc captured on the filter paper using dithizone.
  • The extent of diffusion was also assessed through concentric sampling and chemical analysis of soil sections.
  • The visualization results agreed with the chemical analyses and demonstrated the effects of soil properties and fertilizer formulation on zinc diffusion.
  • Combining zinc 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 zinc phosphate minerals.
Lead research organisation N/A
Host research organisation University of Adelaide
Related program More Profit from Crop Nutrition
Acknowledgments N/A
Other trial partners Not specified
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Method

Crop type No crop specified
Treatment type(s)
  • Soil: Type
Trial type Experimental
Trial design Replicated

Adelaide 2014

Sow date Not specified
Harvest date Not specified
Plot size Not specified
Plot replication Not specified
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Trial report and links

2014 trial report




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Trial last modified: 09-10-2019 14:03pm AEST