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Title: In Situ Acidulation of Rock Phosphate
Contributor(s): Matamwa, Watson (author); Guppy, Christopher  (author)orcid ; Blair, Graeme  (author)
Publication Date: 2018
DOI: 10.1080/00103624.2018.1427266
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Abstract: This study was undertaken to study the impact of adding <75 μm elemental sulfur (ES) on P availability from a range of <250 μm ground rock phosphates (RP) namely; Minjingu (Mi) from Tanzania, Khouribga from Morocco (Mo) and Duchess (D) from Australia. Italian ryegrass ('Lolium multiflorum', Thumpa tetraploid) grown in a glasshouse was used as the test crop and tops were harvested 5 times over 27 weeks. Co-granulating RP and 10.7% ES yielded 30-70% more ryegrass tops than RP alone, with the greatest effect with Mi. Fertilizer P recovery in the tops from the RP was 5.2% with D and 6.5% and 7.8% from Mi and Mo, respectively. ES addition increased this by 51% from Mo, 98% from D and 194% from Mi. Co-granulation of RP with ES has been shown to be an effective means of releasing plant available P to crops from RP with minimal fertilizer processing.
Publication Type: Journal Article
Source of Publication: Communications in Soil Science and Plant Analysis, 49(4), p. 426-432
Publisher: Taylor & Francis Inc
Place of Publication: United States of America
ISSN: 0010-3624
Field of Research (FOR): 050304 Soil Chemistry (excl. Carbon Sequestration Science)
070302 Agronomy
070306 Crop and Pasture Nutrition
Socio-Economic Outcome Codes: 820507 Wheat
830406 Sown Pastures (excl. Lucerne)
830403 Native and Residual Pastures
Peer Reviewed: Yes
HERDC Category Description: C1 Refereed Article in a Scholarly Journal
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Appears in Collections:Journal Article
School of Environmental and Rural Science

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