Struvite (MgNH₄PO₄·6H₂O) has been precipitated from liquid waste streams to recover valuable nutrients, such as phosphorus (P) and nitrogen (N), that can be used as an alternative fertilizer-P source. Because prior research has focused on greenhouse studies, it is necessary to expand struvite evaluations to the field-scale to include row-crop responses. The objective of this field study was to evaluate the effects of two struvite materials (electrochemically precipitated struvite, ECST; and chemically precipitated struvite, CPST) relative to other common fertilizer-P sources (diammonium phosphate, DAP; triple superphosphate, TSP; rock phosphate, RP; and monoammonium phosphate, MAP) on soybean [Glycine max (L.) Merr.] response and economics in two consecutive growing seasons in a P-deficient, silt-loam soil (Aquic Fraglossudalfs) in eastern Arkansas. Averaged across years, soybean aboveground tissue P uptake was largest (P < .05) from ECST (28.4 kg ha⁻¹), which was similar to CPST (26.7 kg ha⁻¹) and TSP (25.9 kg ha⁻¹) and was smallest from RP (21.4 kg ha⁻¹). In 2019, seed yield was largest (P < .05) from ECST (4.1 Mg ha⁻¹), which was similar to DAP, CPST, RP, TSP, and MAP, and was smallest from the unamended control (3.6 Mg ha⁻¹). In 2020, seed yield was numerically greatest from CPST (2.8 Mg ha⁻¹) and was numerically smallest from ECST (2.2 Mg ha⁻¹). Results showed that wastewater-recovered struvite materials have the potential to be a viable, alternative fertilizer-P source for soybean production in a P-deficient, silt-loam soil, but further work is needed to confirm struvite's cost effectiveness.

中文翻译：

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阿肯色州东部受鸟粪石磷源影响的大豆生长和生产

鸟粪石 (MgNH ₄ PO ₄ ·6H ₂ O) 已从液体废物流中沉淀出来，以回收有价值的营养物质，例如磷 (P) 和氮 (N)，可用作替代肥料 P 源。由于先前的研究主要集中在温室研究上，因此有必要将鸟粪石评估扩展到田间规模，以包括行间作物反应。本实地研究的目的是评估两种鸟粪石材料（电化学沉淀鸟粪石，ECST；和化学沉淀鸟粪石，CPST）相对于其他常见磷肥来源（磷酸二铵，DAP；三重过磷酸钙，TSP；磷酸岩）的影响, RP; 和磷酸一铵, MAP) 对大豆 [ Glycine max(L.) Merr.] 在阿肯色州东部缺磷的淤泥壤土 (Aquic Fraglossudalfs) 中连续两个生长季的反应和经济学。多年平均，大豆地上组织吸磷量最大 ( P  < .05) 来自 ECST (28.4 kg ha ^-1 )，这与 CPST (26.7 kg ha ^-1 ) 和 TSP (25.9 kg ha ^-1 ) 相似并且是最小的 RP (21.4 kg ha ^-1 )。 2019 年， ECST的种子产量最大 ( P < .05) (4.1 Mg ha ^-1 )，与 DAP、CPST、RP、TSP 和 MAP 相似，而未修正的对照 (3.6 Mg ha ^{-1 ) 的种子产量最小1} ). 2020 年，CPST 的种子产量在数值上最高（2.8 Mg ha ^-1) 并且在 ECST 中数值最小 (2.2 Mg ha ^-1 )。结果表明，废水回收的鸟粪石材料有可能成为磷缺乏的淤泥壤土中大豆生产的可行的替代肥料磷源，但需要进一步的工作来确认鸟粪石的成本效益。