A slow release boron phosphate to mitigate boron deficiency in high rainfall environments

2012

Research organisatons

Trial details

Researcher(s) M Abat, M McLaughlin, F Degryse, B Ajiboye, B Baird and S Stacey
Year(s) 2012
Contributor South Australian Research and Development Institute
Trial location(s) Adelaide, SA
Further information View external link
A slow release boron phosphate to mitigate boron deficiency in high rainfall environments locations
Aims

To discuss how a slow release boron phosphate to mitigate boron deficiency in high rainfall environments.

Key messages
  • Boron phosphate compounds were synthesized by mixing boric acid and phosphoric acid (1:1 molar ratio) and heating at temperatures of 25 to 1000 °C for 1 or 24 h.
  • X-ray diffraction patterns and chemical analysis results showed formation of boron phosphate compounds at low temperature • These compounds gradually crystallized with increasing temperature and heating time.
  • The compounds synthesized at 300°C or less were hygroscopic, while those synthesized at 500 to 1000°C were non-hygroscopic and free-flowing.
  • The solubility of all compounds decreased with increasing synthesis temperature • The solubility of compounds synthesized at 500 and 800°C increased with increasing pH.
  • The compound synthesized at 1000°C was nearly insoluble and the solubility was not pH dependent.
  • The release of B from the boron phosphate synthesized at 800°C for 1 hour was approximately 70% after 150 days, which confirmed its slow release.
  • The characteristics of the compounds synthesized at temperatures 500 and 800°C showed that it can be used as raw materials for co-granulation with macronutrient fertilisers such as mono-ammonium phosphate.
  • Such co-granulated products are currently being tested.
Lead research organisation N/A
Host research organisation CSIRO - Waite Campus
Related program More Profit from Crop Nutrition
Acknowledgments N/A
Other trial partners Not specified

Method

Crop type No crop specified
Treatment type(s)
  • Fertiliser: Form
Trial type Unknown
Trial design Unknown

Adelaide 2012

Sow date Not specified
Harvest date Not specified
Plot size Not specified
Plot replication Not specified

Trial report and links


No trial reports or attachments found



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Trial last modified: 07-05-2019 19:13pm AEST