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<p>Phosphorus (P) fertilizers are essential but potentially inefficient, especially in shallowrooted potatoes. A 3-year field experiment (2016-2018) was conducted in four distinct sites in Eastern Canada to investigate economic and environmental impacts of struvite-based slow-release and conventional P fertilizers in potato (<i>Solanum tuberosum</i> L.). Marginal return (MR = gross revenue-total operating cost) was assessed for different P treatments (0, 60, 120, 180, and 240 kg P<sub>2</sub>O<sub>5</sub> ha<sup>-1</sup>) from triple super phosphate (TSP) and for different mixtures of struvite (25%, 50%, and 75%) and TSP at 180 P<sub>2</sub>O<sub>5</sub> kg ha<sup>-1</sup>. Comparable MRs to TSP at a rate of 180 kg P2O5 ha-<sup>1</sup> were obtained with a mixture of 75% TSP and 25% struvite across sites and years. Results demonstrated that a struvite-based mixture can be a viable alternative to conventional P fertilizers, improving profitability and lowering potential cumulative environmental costs associated with P application by&#xa0;$8-$24 ha<sup>-1</sup> year<sup>-1</sup> for potato production.</p>

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Economic Assessment of Potato Response to Struvite and Conventional Phosphorus Fertilizer in Eastern Canada

  • 期刊论文

  • 出版模式：

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  • 发表日期：

    2025年12月4日

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  • M. Khakbazan,
  • J. Nyiraneza,
  • R. Benjannet,
  • A. N. Cambouris,
  • K. Fuller,
  • S. Hann,
  • N. Ziadi,
  • D. Biswas

摘要

Phosphorus (P) fertilizers are essential but potentially inefficient, especially in shallowrooted potatoes. A 3-year field experiment (2016-2018) was conducted in four distinct sites in Eastern Canada to investigate economic and environmental impacts of struvite-based slow-release and conventional P fertilizers in potato (Solanum tuberosum L.). Marginal return (MR = gross revenue-total operating cost) was assessed for different P treatments (0, 60, 120, 180, and 240 kg P2O5 ha-1) from triple super phosphate (TSP) and for different mixtures of struvite (25%, 50%, and 75%) and TSP at 180 P2O5 kg ha-1. Comparable MRs to TSP at a rate of 180 kg P2O5 ha-1 were obtained with a mixture of 75% TSP and 25% struvite across sites and years. Results demonstrated that a struvite-based mixture can be a viable alternative to conventional P fertilizers, improving profitability and lowering potential cumulative environmental costs associated with P application by $8-$24 ha-1 year-1 for potato production.