Solubilization of Bay&amp;#243;var Natural Phosphate Rock under the Drain Effect of Calcium and Phosphorus at Two Levels of Acidity

Novais, Sarah Vieira; Mattiello, Edson Márcio; Vergütz, Leonardus; Frade, Elizio Ferreira; Novais, Roberto Ferreira

doi:10.4236/ojss.2017.78013

Cited by 1 publication

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References 14 publications

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“…In this respect, however, it is important to emphasize that plants can also affect rock phosphate dissolution through absorbing P and Ca 2+ and liberating H + and organic acids (Kumari & Phogat, 2008;Novais et al, 2017). In addition, rhizosphere microorganisms contribute to the solubilization of P from rock phosphates, thereby facilitating its plant uptake (Hamdali et al, 2008).…”

Section: Resultsmentioning

confidence: 99%

Maize yield influenced by the residual effects of sedimentary phosphates in high-calcium soil

Souza

Sobral

Oliveira

2020

Rev. bras. eng. agríc. ambient.

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It was evaluated the residual effects of sedimentary phosphates associated with the annual application of phosphate on maize grown in Inceptisol soil with a high exchangeable calcium concentration and pH value of 6.0. The experiment was conducted based on a completely randomized block design with strip-split plots. The main plots were treated with Bayóvar rock phosphate, Itafós rock phosphate, or triple superphosphate, while the control received no additional phosphate. The phosphate sources were applied by broadcasting and incorporated in the soil two years prior to the current study at 200 kg of P2O5 ha-1, with no tillage in subsequent years. In the sub-plots, phosphate doses of 0, 60, and 120 kg of P2O5 ha-1 year-1, as triple superphosphate, were applied at the base of the sowing furrows. Leaf phosphorus (P), grain yield, and soil P by ion exchange resin were evaluated. Differences were observed between the leaf P among the plots treated with phosphate sources and the control plot, which declined from 2013 to 2015. In 2013 and 2014, rock phosphate residuals influenced the grain yield when there was no annual application of phosphate. In 2015, grain yields in rock phosphate treatments without annual phosphate application were not superior to those in the control treatment and did not differ significantly from the plots receiving triple superphosphate. Furthermore, it was found that the soil P content extracted by ion exchange resin was higher in the Itafós treatment; however, for this source, the correlation between soil P and grain yield was relatively weak.

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Section: Resultsmentioning

confidence: 99%