相关实验视频

Updated: May 27, 2025

Measuring Phosphorus Release in Laboratory Microcosms for Water Quality Assessment

Measuring Phosphorus Release in Laboratory Microcosms for Water Quality Assessment

Published on: July 22, 2019

水文条件影响土壤指数对水形土壤中泄漏的预测

Sen Gu¹, Rémi Dupas², Antoine Casquin³

¹Institute of Hydrobiology, Chinese Academy of Sciences, 430072 Wuhan, China; iEES, UMR 7618, CNRS-Sorbonne University-INRAE-UPEC-IRD, 75005 Paris, France.

The Science of the total environment

|February 15, 2025

概括

土壤P指数预测水形土壤中的损失,但有效性随着水浸积而变化. 对于这些情况,建议使用像Dyer P这样的激进指标来改善管理.

科学领域:

环境科学环境科学
土壤科学土壤科学
农业科学农业科学

背景情况:

地下浸是农业地区 (P) 损失的主要途径.
土壤P指数 (SPI) 用于评估P泄漏风险,但它们在水形土壤中的表现尚不清楚.
在农业水域中常见的水形土壤,由于水浸沉,对P管理提出了独特的挑战.

研究的目的:

评估各种SPI对水形土壤中土壤水的P度的预测能力.
评估水文条件如何影响SPI在预测P泄漏风险方面的有效性.
为了确定最有弹性的SPI来管理水形农业土壤中的P损失.

主要方法:

在三年内对土壤水中的P度 (酸盐反应性P和总溶解P) 进行实地监测.
计算和比较八个不同的SPI,包括奥尔森P,总P和P和度指数.
统计分析 (Pearson r2) 用于将SPI与土壤水P相关联,并评估水文变化的影响.

主要成果:

SPI与土壤水 P (平均r2 0.34-0.64) 显示了中度的,时间变化的相关性.
几个SPI (Olsen P,ECPo,DPS_Olsen,DPS_Pöthig,TP) 的预测有效性在冬季浸水期间明显下降,而不是干旱时期.
水文条件强烈影响了SPI的预测能力,特别是对酸盐反应性P的预测能力.

结论:

由于水态变异性,现有的SPI在准确预测水形土壤中P浸出风险方面存在局限性.
标志性产品的有效性受到季节性浸水和干燥周期的重大影响.
戴尔P和DPS_戴尔指数表现出更大的弹性,并被推用于开发水形农业土壤中P漏风险指标.

关键词:

吸附/脱吸方式吸附/脱吸方式农业土壤农业土壤生物地化学过程生物地化学过程在地表下水.在水中浸泡,使水淹没.

更多相关视频

A Protocol for Collecting and Constructing Soil Core Lysimeters

A Protocol for Collecting and Constructing Soil Core Lysimeters

Published on: June 6, 2016

Soil Lysimeter Excavation for Coupled Hydrological, Geochemical, and Microbiological Investigations

Soil Lysimeter Excavation for Coupled Hydrological, Geochemical, and Microbiological Investigations

Published on: September 11, 2016

相关概念视频

Factors Affecting Solubility

Factors Affecting Solubility

Compared with pure water, the solubility of an ionic compound is less in aqueous solutions containing a common ion (one also produced by dissolution of the ionic compound). This is an example of a phenomenon known as the common ion effect, which is a consequence of the law of mass action that may be explained using Le Chȃtelier’s principle. Consider the dissolution of silver iodide:

The Phosphorus Cycle

The Phosphorus Cycle

Unlike carbon, water, and nitrogen, phosphorus is not present in the atmosphere as a gas. Instead, most phosphorus in the ecosystem exists as compounds, such as phosphate ions (PO43-), found in soil, water, sediment and rocks. Phosphorus is often a limiting nutrient (i.e., in short supply). Consequently, phosphorus is added to most agricultural fertilizers, which can cause environmental problems related to runoff in aquatic ecosystems.

Responses to Drought and Flooding

Responses to Drought and Flooding

Water plays a significant role in the life cycle of plants. However, insufficient or excess of water can be detrimental and pose a serious threat to plants.