The analyses of soil and water for determinations of nitrogen fate and transfer in agricultural riparian zones

河岸湿地被认为可以有效地减少化学品从农田的转移，但地下水和地表水中的硝酸盐负荷仍然是一个问题。需要更好地了解河岸湿地何时以及为什么不能减少硝酸盐。目前，知识的时间模式的命运和运输的氮是缺乏的。事件发生前的先决条件可能发挥重要作用，通过其对土壤氮素转化，径流途径，这两个变量的相互作用，在氮动态的时间模式的管理。 需要实验室仪器来量化径流和土壤提取物中的养分，以表征和量化这些过程。该设备将使我有可能解决三个目标：（1）确定和量化的水文和生态地球化学控制的氮归宿和河岸土壤中的运输; 2）表征水文控制的命运和转移的氮在南安大略的农业河岸湿地时，水化学输入的湿地来源于双重来源（3）量化前期水文条件（AHC）对基于事件的氮素转移的影响。 上述项目（以及涉及化学品在环境中的归宿和转移的任何其他项目）需要一种分析水样和土壤提取物的手段。能够在我自己的实验室内使用一台仪器分析所有样本将显著提高我的研究能力，特别是因为它有助于临时密集型研究（例如基于风暴的采样和分析）。该设备在分析类型方面具有强大的功能和多功能性，它能够并将在未来许多年内需要。

Riparian wetlands are understood to effectively reduce the transfer of chemicals from agricultural lands, yet nitrate loading in ground water and surface water remains a problem. An improved understanding of when and why riparian wetlands do not attenuate nitrate is needed. At present, knowledge of temporal patterns in the fate and transport of nitrogen is lacking. Pre-event antecedent conditions may play an important role in governing temporal patterns in nitrogen dynamics through their effect on soil nitrogen transformations, runoff pathways, and the interaction of these two variables.  Laboratory instrumentation is required to quantify nutrients in runoff and soil extracts to characterize and quantify such processes. This equipment will make it possible for me to address three objectives: (1) to identify and quantify the hydrologic and biogeochemical controls on nitrogen fate and transport in riparian soils; 2) to characterize hydrologic controls on the fate and transfer of nitrogen in an agricultural riparian wetland in Southern Ontario when hydrochemical inputs to the wetland originate from dual sources (upland, upstream); and (3) to quantify the effects of antecedent hydrologic conditions (AHC) on event-based nitrogen transfer.   The above project (and any other project involving the fate and transfer of chemicals in the environment) requires a means of analyzing both water samples and extracts from soils. The ability to analyze all of my samples within my own lab on a single instrument will significantly improve my research capabilities, particularly because it facilitates temporally-intensive research (e.g. storm-based sampling and analyses). This equipment is robust and versatile in the types of analyses that it is capable of and will be needed for many years to come.