Evaluation of Minnesota Phosphorus Loss Index performance.

IF 2.2 4区环境科学与生态学 Q3 ENVIRONMENTAL SCIENCES

Journal of environmental quality Pub Date : 2024-10-08 DOI:10.1002/jeq2.20635

Heidi Reitmeier, Lindsay Pease, Peyton Loss, Tim Radatz

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引用次数: 0

Abstract

Supported by the National Phosphorus (P) Research Project led by Dr. Andrew Sharpley, Minnesota developed its statewide P-Index, the Minnesota P Loss Index (MNPI), to manage critical source areas of agricultural P. The MNPI has remained unchanged since its last revision in 2006. The overall goal of this study was to critically evaluate the MNPI to determine, in the parlance of Sharpley, if the MNPI remains "directionally and magnitudinally correct." Observed P loss from 67 site-years of annual edge-of-field data was compared with MNPI-predicted P loss. Our assessment indicates that MNPI performance is directionally correct: it correctly ranks fields that are more at risk than others. The MNPI performed better in years with high-intensity rainfall events. Averaging MNPI assessment across multiple years of data input, along with minor adjustments to the calculation algorithm, improved the robustness of MNPI estimates. Continued re-evaluation of the MNPI will ensure that this important tool for nutrient management is properly evaluating P loss potential. This study reflects Dr. Sharpley's decades-long effort to improve and revise P indices so that they reflect advances in the science and management of agricultural P.

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明尼苏达磷损失指数性能评估。

在安德鲁-夏普利（Andrew Sharpley）博士领导的国家磷（P）研究项目的支持下，明尼苏达州制定了全州磷指数，即明尼苏达磷损失指数（MNPI），以管理农业磷的关键来源区。本研究的总体目标是对 MNPI 进行严格评估，用 Sharpley 的术语来说，就是确定 MNPI 在 "方向和幅度上是否仍然正确"。我们将从 67 个站点年的年度田边数据中观察到的 P 损失与 MNPI 预测的 P 损失进行了比较。我们的评估结果表明，MNPI 的表现在方向上是正确的：它能正确地排列出比其他田块风险更大的田块。在降雨强度大的年份，MNPI 的表现更好。对多年数据输入进行平均 MNPI 评估，并对计算算法稍作调整，提高了 MNPI 估计值的稳健性。继续重新评估 MNPI 将确保这一重要的养分管理工具能够正确评估钾损失的可能性。这项研究反映了 Sharpley 博士几十年来为改进和修订钾指数所做的努力，从而使这些指数能够反映农业钾科学和管理的进步。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Journal of environmental quality 环境科学-环境科学

CiteScore

4.90

自引率

8.30%

发文量

123

审稿时长

3 months

期刊介绍： Articles in JEQ cover various aspects of anthropogenic impacts on the environment, including agricultural, terrestrial, atmospheric, and aquatic systems, with emphasis on the understanding of underlying processes. To be acceptable for consideration in JEQ, a manuscript must make a significant contribution to the advancement of knowledge or toward a better understanding of existing concepts. The study should define principles of broad applicability, be related to problems over a sizable geographic area, or be of potential interest to a representative number of scientists. Emphasis is given to the understanding of underlying processes rather than to monitoring. Contributions are accepted from all disciplines for consideration by the editorial board. Manuscripts may be volunteered, invited, or coordinated as a special section or symposium.