Electrochemically precipitated struvite effects on extractable nutrients compared with other fertilizer‐phosphorus sources
Electrochemically precipitated struvite effects on extractable nutrients compared with other fertilizer‐phosphorus sources
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与其他肥料磷源相比，电化学沉淀鸟粪石对可提取养分的影响
DOI：
10.1002/agg2.20183
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发表时间：
2021
期刊：
影响因子：
--
通讯作者：
Roberts, Trenton
中科院分区：
文献类型：
--
作者：
Anderson, Ryder;Brye, Kristofor;Kekedy‐Nagy, Laszlo;Greenlee, Lauren;Gbur, Edward;Roberts, Trenton
从废水流中回收鸟粪石或磷酸铵镁（MgNH 4PO 4·6 H2O）可以提供传统磷肥的替代品。很少有研究评估鸟粪石相对于其他商业上可用的行为，在美国历史上的中耕土壤中的肥料-磷源。本研究的目的是评估总的可提取的P和其他营养物质从电化学（ECST）和化学沉淀鸟粪石（CPST）相比，三重过磷酸钙（TSP），磷酸氢二铵（DAP），磷酸一铵（MAP），磷酸盐（RP）在潮湿的土壤培养没有植物使用不同的土壤质地（壤土，粉壤土，粉质粘壤土）。每种肥料-磷源的统一施用量为24.5 kg总磷ha-1。在9个月的时间内（0.5、1、2、4、6和9个月）进行了6次土壤采样，以检查土壤pH值和水溶性（WS）和Mehlich-3可提取营养素浓度（P、Ca、Mg和Fe）随时间的变化。0.5个月后，ECST治疗组的WS‐P浓度增加最多（41.6 mg kg-1），与DAP无差异。在剩余的8.5个月孵育期间，大多数处理组中的WS-P浓度普遍下降，但在9个月时仍高于初始水平，并且ECST、CPST、MAP、DAP和TSP处理组之间通常相似。在土壤条件下，ECST和MAP，DAP和TSP之间的WS-P浓度接近田间容量（约0.2 g g-1），支持鸟粪石作为可持续的肥料-P来源的潜力，从而进一步研究植物对鸟粪石作为替代肥料-P来源的反应。
Recovery of struvite, or magnesium ammonium phosphate (MgNH4PO4· 6H2O), from wastewater streams may provide an alternative to traditional P fertilizers. Little research has assessed the behavior of struvite relative to other commercially available, fertilizer‐P sources in historically row‐cropped soils in the United States. The objective of this study was to evaluate total extractable P and other nutrients from electrochemically (ECST) and chemically precipitated struvite (CPST) compared with triple superphosphate (TSP), diammonium phosphate (DAP), monoammonium phosphate (MAP), and rock phosphate (RP) in a moist‐soil incubation without plants using varying soil textures (loam, silt loam, and silty clay loam). A uniform application rate of 24.5 kg total P ha–1was used for each fertilizer‐P source. Soil sampling occurred six times over a 9‐mo period (0.5, 1, 2, 4, 6, and 9 mo) to examine the change in soil pH and water‐soluble (WS) and Mehlich‐3‐extractable nutrient concentrations (P, Ca, Mg, and Fe) from their initial levels over time. After 0.5 mo, WS‐P concentrations increased the most in the ECST treatment (41.6 mg kg–1), which did not differ from that of DAP. Throughout the remaining 8.5 mo of incubation, WS‐P concentrations generally decreased in most treatments but were still greater than the initial level by 9 mo and were often similar among ECST, CPST, MAP, DAP, and TSP treatments. Comparable WS‐P concentrations among ECST and MAP, DAP, and TSP under soil conditions near field capacity (∼0.2 g g–1) support struvite's potential as a sustainable fertilizer‐P source, thus warranting further investigation of the plant response to struvite use as an alternative fertilizer‐P source.
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影响因子：
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