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首页> 外文期刊>International journal of soil science >Porous Ceramic Cups: Preparation and Installation of Samplers for Measuring Nitrate Leaching
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Porous Ceramic Cups: Preparation and Installation of Samplers for Measuring Nitrate Leaching

机译：多孔陶瓷杯：用于测量硝酸盐浸出的采样器的准备和安装

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摘要

Ceramic cup samplers are widely used in agriculture to obtain samples of soil pore water for nitrate analysis. This method has become well developed over the past 30 years; however, it is not fully clear what preparation and installation procedure gives the most reliable results or what factor could limit the validity of their use. This study describes the design and use of these samplers including modifications made during large-scale experimental work, on heavy soils in the East of Ireland. Ceramiccup samplers must be installed carefully to avoid preferential flow through the disturbed soil around them and to maximize contact between cup and soil. Furthermore, if samplers are not prepared adequately prior to installation, the cup material may release contaminants into the collected samples resulting in prejudice study results. Newly installed ceramic cups were used at University College Dublin (UCD), Ireland, in 2008 to determine the degree of nitrate leaching from various crops post-fertilization with organic manures. The ceramic cups were cleaned using a dilute acid and repeatedly rinsed with deionized water. During the installation process sodium bentonite and silica flour were used to minimize preferential flow and ensure good hydraulic contact between the sampler and the soil.
机译：陶瓷杯采样器被广泛用于农业中，以获取土壤孔隙水的样本进行硝酸盐分析。在过去的30年中，这种方法已经得到了很好的发展。但是，目前尚不清楚什么准备和安装程序能够提供最可靠的结果，或者哪些因素可能会限制其使用的有效性。这项研究描述了这些采样器的设计和使用，包括在爱尔兰东部重土壤上进行的大规模实验工作中所做的修改。陶瓷杯采样器必须小心安装，以免优先流动通过其周围受干扰的土壤，并最大限度地提高杯与土壤之间的接触。此外，如果在安装之前未充分准备好采样器，则杯子材料可能会将污染物释放到收集的样品中，从而影响研究结果。爱尔兰都柏林大学（UCD）于2008年使用了新安装的陶瓷杯，以确定有机肥料施肥后各种作物中硝酸盐的浸出程度。陶瓷杯用稀酸清洗，并用去离子水反复冲洗。在安装过程中，使用了膨润土钠和硅粉，以减少优先流动并确保采样器与土壤之间的良好水力接触。

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