Soil Chemical Property Changes over Time from Struvite Compared to Other Fertilizer-Phosphorus Sources in Multiple Soils  

作　　者：Tatum Simms Kristofor R. Brye Trenton L. Roberts Lauren F. Greenlee Tatum Simms;Kristofor R. Brye;Trenton L. Roberts;Lauren F. Greenlee(Department of Crop, Soil, and Environmental Sciences, University of Arkansas, Fayetteville, AR, USA;Department of Chemical Engineering, Pennsylvania State University, University Park, PA, USA)

机构地区：[1]Department of Crop, Soil, and Environmental Sciences, University of Arkansas, Fayetteville, AR, USA [2]Department of Chemical Engineering, Pennsylvania State University, University Park, PA, USA

出　　处：《Agricultural Sciences》2023年第10期1465-1500,共36页农业科学（英文）

摘　　要：Studies have shown that phosphorus (P) recovered from wastewater as the mineral struvite [MgNH₄PO₄·6(H₂O)] may be a viable alternative fertilizer-P source. This study aimed to compare the effectiveness of electrochemically precipitated struvite (ECST), reclaimed from synthetic wastewater, to other commercial fertilizer-P sources in cultivated soils from Arkansas [AR;silt loam (SiL) and loam (L)], Missouri (MO;SiL), and Nebraska [NE;SiL and sandy loam (SL)]. A plant-less, moist-soil incubation experiment, including ECST, chemically precipitated struvite (CPST), monoammonium phosphate (MAP), triple superphosphate (TSP), and an unamended control (UC), was conducted to quantify soil pH, nitrate (NO₃-N), ammonium (NH₄-N), and Mehlich-3 (M3)-P, -Ca, -Mg, and -Fe concentrations at 0.5, 1, 2, 4, and 6 months. All measured soil properties differed (P ·kg^-1 for AR-L-TSP after 1 month and NE-SiL-MAP after 6 months, respectively. Soil M3-P ranged from -29.6 mg·kg^-1 in the AR-L-UC after 1 month to 429 mg·kg^-1 AR-SiL-TSP after 0.5 months. Results showed that, over time, ECST had comparable pH and soil NO₃-N, NH₄-N, and M3-P, -Ca, -Mg, and -Fe behavior compared to CPST, MAP, and TSP across various soil textures.Studies have shown that phosphorus (P) recovered from wastewater as the mineral struvite [MgNH₄PO₄·6(H₂O)] may be a viable alternative fertilizer-P source. This study aimed to compare the effectiveness of electrochemically precipitated struvite (ECST), reclaimed from synthetic wastewater, to other commercial fertilizer-P sources in cultivated soils from Arkansas [AR;silt loam (SiL) and loam (L)], Missouri (MO;SiL), and Nebraska [NE;SiL and sandy loam (SL)]. A plant-less, moist-soil incubation experiment, including ECST, chemically precipitated struvite (CPST), monoammonium phosphate (MAP), triple superphosphate (TSP), and an unamended control (UC), was conducted to quantify soil pH, nitrate (NO₃-N), ammonium (NH₄-N), and Mehlich-3 (M3)-P, -Ca, -Mg, and -Fe concentrations at 0.5, 1, 2, 4, and 6 months. All measured soil properties differed (P ·kg^-1 for AR-L-TSP after 1 month and NE-SiL-MAP after 6 months, respectively. Soil M3-P ranged from -29.6 mg·kg^-1 in the AR-L-UC after 1 month to 429 mg·kg^-1 AR-SiL-TSP after 0.5 months. Results showed that, over time, ECST had comparable pH and soil NO₃-N, NH₄-N, and M3-P, -Ca, -Mg, and -Fe behavior compared to CPST, MAP, and TSP across various soil textures.

关 键 词：Electrochemically Precipitated Struvite Chemically Precipitated Struvite Soil Incubation Soil Texture 

分 类 号：S15[农业科学—土壤学]