Effects of air availability and straw amendment on swine manure phosphorus runoff potential

IF 7.1 2区环境科学与生态学 Q1 ENGINEERING, ENVIRONMENTAL

Waste management Pub Date : 2026-03-15 Epub Date: 2026-02-10 DOI:10.1016/j.wasman.2026.115374

Wenchao Xing , Hongzhen Ma , Zhenyu Xue , Shixiao Xu , Lixin Jia , Pengxiang Xu , Danping Jiang , Fuqing Xu

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引用次数: 0

Abstract

Manure is a significant source of phosphorus (P) fertilizer, but its P solubility may influence both environmental impacts and fertilizer effectiveness. The transformation of P fractions in manure during long-term storage remains unclear. This study evaluated P speciation dynamics during extended swine manure storage under both unsealed and sealed conditions, and examined corn straw as an amendment to enhance P stabilization. Results showed that during unsealed conditions, Olsen-P (H₂O-P and NaHCO₃-P) concentration decreased by 16%, while Fix-P (NaOH-P + HCl-P) concentration increased by 150%, indicating the conversion of P to more stable forms. In contrast, sealed conditions had smaller effects on P concentration and solubility, with Fix-P increased by 3%. The incorporation of corn straw in unsealed system resulted in a 45% increase in total phosphorus (TP) concentration and a 12% reduction in Olsen-P, suggesting that the addition of corn straw enhanced chemical precipitation and organic complexation of P. Sealed conditions with straw amendment exhibited similar trends to those in sealed and unamended ones. Under long-term unsealed storage, soluble P in swine manure converted to more stable minerals including MgNH₄PO₄·6H₂O, Fe₃(PO₄)₂·H₂O, and AlPO₄·2H₂O, and the manure particles aggregated more. This study may provide valuable insights for developing cost-effective swine manure management practice to reduce P runoff potential.

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空气有效性和秸秆改良对猪粪磷径流势的影响

粪肥是磷肥的重要来源，但其磷的溶解度会影响环境影响和肥料的有效性。粪便中磷组分在长期贮存过程中的转化尚不清楚。本研究评估了猪粪在非密封和密封条件下长期储存期间磷的形态动态，并考察了玉米秸秆作为增强磷稳定的添加剂。结果表明，在不密封条件下，Olsen-P （H2O-P和NaHCO3-P）浓度下降了16%，而Fix-P （NaOH-P + HCl-P）浓度增加了150%，表明P向更稳定的形态转化。封闭条件对磷浓度和溶解度的影响较小，固定磷增加了3%。玉米秸秆掺入未密封体系后，总磷（TP）浓度增加45%，奥尔森磷（Olsen-P）降低12%，表明添加玉米秸秆增强了磷的化学沉淀和有机络合作用。在长期不密封贮存条件下，猪粪中的可溶性磷转化为MgNH4PO4·6H2O、Fe3(PO4)2·H2O和AlPO4·2H2O等较为稳定的矿物质，且粪粒聚集性增强。该研究可为开发具有成本效益的猪粪管理方法以减少磷径流潜力提供有价值的见解。

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来源期刊

Waste management 环境科学-工程：环境

CiteScore

15.60

自引率

6.20%

发文量

492

审稿时长

39 days

期刊介绍： Waste Management is devoted to the presentation and discussion of information on solid wastes,it covers the entire lifecycle of solid. wastes. Scope: Addresses solid wastes in both industrialized and economically developing countries Covers various types of solid wastes, including: Municipal (e.g., residential, institutional, commercial, light industrial) Agricultural Special (e.g., C and D, healthcare, household hazardous wastes, sewage sludge)