Wastewater‐recovered struvite effects on total extractable phosphorus compared with other phosphorus sources
Wastewater‐recovered struvite effects on total extractable phosphorus compared with other phosphorus sources
复制标题
与其他磷源相比，废水回收鸟粪石对总可提取磷的影响
作者：
R. Anderson;K. Brye;L. Greenlee;T. Roberts;E. Gbur
含磷矿物鸟粪石（MgNH 4PO 4·6 H2O）的有意沉淀是可持续水管理的一个有吸引力的选择，因为它能够从各种废物来源中回收磷。有限的研究已经评估了鸟粪石的潜力作为肥料磷源在农艺土壤相比，其他传统的肥料磷源在淹水土壤条件下，常见的低地水稻（Oryza sativa L.）。本研究的目的是评估与磷酸一铵（MAP）和三重过磷酸钙（TSP）相比，在淹水土壤环境中使用两种粉壤土（SiL）和一种粉质粘壤土（SiCL）进行无植物土壤培养的废水回收鸟粪石（ST）材料随时间推移的总可提取土壤P。复制土壤杯修正率为24.5公斤磷公顷-1，并在0.5，1，2，3，和4个月后取样。在第一个月，ST处理（0.5和1个月后分别为69.9和52.2 mg kg-1）的总水溶性（WS）土壤磷浓度增加最多，比任何其他处理。然而，在整个剩余的3个月的孵化，总WS土壤磷浓度普遍下降，但仍大于初始，肥料处理之间是相似的。随着时间的推移，所有三种土壤中的Mehlich-3（M3）土壤P总浓度从ST处理的初始值增加最多（分别为66.6，71.3和74.5 mg kg-1），与MAP和TSP没有差异。在淹水土壤条件下，肥料之间的总WS-P和M3-P浓度相当，进一步支持鸟粪石作为替代肥料P源的农学潜力。
Intentional precipitation of the phosphorus (P)‐containing mineral struvite (MgNH4PO4· 6H2O) is an attractive option in sustainable water management due to the ability to recover P from various waste sources. Limited research has assessed struvite's potential as a fertilizer P source in agronomic soils compared with other conventional fertilizer P sources under flooded soil conditions, common for lowland rice (Oryza sativaL.). The objective of this study was to evaluate total extractable soil P over time from a wastewater‐recovered struvite (ST) material in a plant‐less soil incubation with two silt‐loam (SiL) and a silty clay loam (SiCL) soil in a flooded soil environment compared to monoammonium phosphate (MAP) and triple superphosphate (TSP). Replicated soil cups were amended at a rate of 24.5 kg P ha–1and were sampled after 0.5, 1, 2, 3, and 4 mo. Total water‐soluble (WS) soil P concentrations increased the most from the initial in the ST treatment (69.9 and 52.2 mg kg–1after 0.5 and 1 mo, respectively) than in any other treatment in the first month. However, throughout the remaining 3 mo of incubation, total WS soil P concentrations generally decreased, but remained greater than the initial, and were similar among fertilizer treatments. Averaged over time, total Mehlich‐3 (M3) soil P concentrations in all three soils increased the most from the initial in the ST treatment (66.6, 71.3, and 74.5 mg kg–1, respectively), which did not differ from MAP and TSP. The comparable total WS‐P and M3‐P concentrations among fertilizers under flooded soil conditions further support struvite's agronomic potential as an alternative fertilizer P source.
不同土壤质地中化学沉淀鸟粪石随时间的溶解动态
DOI：
10.4236/as.2020.116036
发表时间：
2020
期刊：
Agricultural Sciences
影响因子：
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作者：
Anderson, Ryder;Brye, Kristofor R.;Greenlee, Lauren;Gbur, Edward
通讯作者：
Gbur, Edward