Shober Amy L, Simpson Zachary P, Jarvie Helen P, Macrae Merrin L, Kleinman Peter J A, Haygarth Philip M, Kulesza Stephanie, Gatiboni Luke, Davies Jenny
Department of Plant and Soil Sciences, University of Delaware, Newark, Delaware, USA.
USDA-ARS, Sustainable Water Management Research Unit, Stoneville, Mississippi, USA.
J Environ Qual. 2025 Jul-Aug;54(4):882-892. doi: 10.1002/jeq2.20659. Epub 2024 Dec 8.
Legacy phosphorus (P) is a concept advanced by Dr. Andrew Sharpley and colleagues that was originally applied to the persistence of anthropogenic signatures in watersheds, and it has since been adopted in a diversity of settings to help guide the science and management of P. Following Sharpley's example to develop consensus-based science, we considered contrasting perspectives on legacy P and defined legacy P as those stores within the environment that arise from historic human activity excluding "natural" or "background" geogenic sources. Legacy P is not restricted to one system or setting; it may reside in soils, sediments, biota, and water bodies. Legacy P has been estimated by fluxes (inputs minus outputs of P to a system) or, equivalently, by mass stocks (total minus geogenic). Because the origin of P in the environment cannot currently be directly quantified, we recommend that researchers report "total P" to track wider watershed P stocks and fluxes of P that include legacy P. We recognize that the definition of legacy P will continue to evolve as we continue to work toward consensus. Ultimately, the final definition of legacy P has consequences for the implementation and success of regulatory and voluntary strategies for legacy P management in agricultural systems. We support continued progress toward a consensus-backed, research-grounded definition for legacy P that is widely applicable yet useful for guiding management and policy.
遗留磷（P）是安德鲁·夏普ley博士及其同事提出的一个概念，最初用于描述流域中人为特征的持久性，此后已在多种环境中采用，以帮助指导磷的科学研究和管理。以夏普ley发展基于共识的科学为例，我们考虑了关于遗留磷的不同观点，并将遗留磷定义为环境中由历史人类活动产生的储存，不包括“自然”或“背景”地质成因来源。遗留磷不限于一个系统或环境；它可能存在于土壤、沉积物、生物群和水体中。遗留磷可以通过通量（进入系统的磷输入减去输出）或等效地通过质量存量（总量减去地质成因量）来估算。由于目前无法直接量化环境中磷的来源，我们建议研究人员报告“总磷”，以追踪更广泛的流域磷存量和包括遗留磷在内的磷通量。我们认识到，随着我们继续努力达成共识，遗留磷的定义将继续演变。最终，遗留磷的最终定义会对农业系统中遗留磷管理的监管和自愿策略的实施及成效产生影响。我们支持朝着一个基于共识、以研究为基础的遗留磷定义不断取得进展，该定义应广泛适用且有助于指导管理和政策制定。
