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在种植系统中测试威斯康星州P指数评估

Laura Good¹, Hava Blair¹, Jessica Sherman²

¹Department of Soil and Environmental Sciences, University of Wisconsin-Madison, Madison, Wisconsin, USA.

Journal of environmental quality

|June 3, 2025

概括

威斯康星州P指数 (WPI) 准确估计农业 (P) 排放量,区分在作物系统中溶解的P和颗粒物P的损失. 世界营养指数显示了改善营养管理和环境可持续性的潜力.

科学领域:

农业科学农业科学
环境科学环境科学
土壤科学土壤科学

背景情况:

管理农业流失 (P) 对环境可持续性至关重要.
了解溶解P (DP) 和颗粒P (PP) 之间的差异对于有效管理至关重要.
威斯康星州P指数 (WPI) 是一种用于评估土地管理对P流量影响的工具.

研究的目的:

测试WPI在耕作玉米料和多年料作物种植系统之间识别P损失权衡的能力.
评估WPI对作物系统内处理差异的敏感性.
使用监测数据验证WPI估计.

主要方法:

利用监测数据将WPI估计与实际P损失进行比较.
在溶解P (DP) 和颗粒P (PP) 方面分析了P损失.
将测量的悬浮沉积物,降水和排水数据纳入WPI模型.

主要成果:

WPI的估计通常得到监测结果的支持.
玉米系统的总P损失较高,以PP为主,而多年料系统的总P损失较小,以DP为主.
WPI准确地区分了系统内的大多数处理差异,但低估了冬季流水,并显示了DP和沉积物P的特定过高/低估.

结论:

WPI是评估P流量和指导营养管理的一个有价值的工具.
该模型显示了适应其他寒冷气候地区的潜力.
改善WPI的具体领域包括冬季下水和在各种作物系统中区分P形式.

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