Phosphorus (P) is an essential element to all living beings but also a finite resource. P-related problems center around broken P cycles from local to global scales. This paper presents outcomes from the 9th International Phosphorus Workshop (IPW9) held 2019 on how to move towards a sustainable P management. It is based on two sequential discussion rounds with all participants. Important progress was reported regarding the awareness of P as finite mineable resource, technologies to recycle P, and legislation towards a circular P economy. Yet, critical deficits were identified such as how to handle legacy P, how climate change may affect ecosystem P cycling, or working business models to up-scale existing recycling models. Workshop participants argued for more transdisciplinary networks to narrow a perceived science-practice/policy gap. While this gap may be smaller in reality as illustrated with a Swiss example, we formulate recommendations how to bridge this gap more effectively.

磷 (P) 是所有生物的基本元素，也是一种有限的资源。P 相关问题围绕从局部到全局尺度的 P 循环中断。本文介绍了 2019 年举行的第九届国际磷研讨会 (IPW9) 关于如何迈向可持续磷管理的成果。它基于所有参与者的两轮连续讨论。报告了关于 P 作为有限可开采资源的认识、回收 P 的技术以及针对循环 P 经济的立法方面的重要进展。然而，我们发现了一些关键缺陷，例如如何处理遗留磷、气候变化如何影响生态系统磷循环，或利用商业模式升级现有回收模式。研讨会参与者主张建立更多跨学科网络，以缩小感知到的科学实践/政策差距。