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首页> 外文期刊>Nordic hydrology >Nutrient Losses and N & P Balances in Small Agricultural Watersheds in Estonia
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Nutrient Losses and N & P Balances in Small Agricultural Watersheds in Estonia

机译：爱沙尼亚小型农业流域的养分流失和氮磷平衡

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The paper deals with nutrient runoff monitoring results and calculated nutrient budgets on catchment level in small agricultural watersheds in Estonia. A special programme for monitoring of nutrient losses was initiated and a network of monitoring stations, equipped with data-loggers and suitable devices for continuous flow measurement and flow-proportional automatic water sampling were established in Estonia in the mid-1990s. The research methodology is harmonized with the Nordic countries as well as with the other Baltic countries. The results indicate that nutrients losses are relatively low (generally below 11 kg N/ha and 0.9 kg P/ha). It can be partly explained by drastic changes in the Estonian agricultural practice in the 1990s but also by differences in runoff regime. Nutrient balances were calculated for two catchments, based on the data collected from the farms, some special studies and water quality monitoring results in two watersheds in 1995 (1999) ― 2001. The nutrient balances for the catchments turned positive after being negative both for nitrogen and phosphorus in the mid-1990s.
机译：本文讨论了养分径流监测结果，并计算了爱沙尼亚小型农业流域的流域水平养分预算。 1990年代中期，在爱沙尼亚建立了一个监测养分流失的特别计划，并建立了一个监测站网络，该监测站配备了数据记录器和合适的设备，用于连续流量测量和流量比例自动取水。研究方法与北欧国家和其他波罗的海国家保持一致。结果表明，养分损失相对较低（通常低于11千克氮/公顷和0.9千克磷/公顷）。 1990年代爱沙尼亚农业实践的急剧变化，也可以部分地通过径流制度的不同来解释。基于从农场收集的数据，一些特殊研究和1995年（1999年）至2001年两个流域的水质监测结果，计算了两个流域的养分平衡。流域的养分平衡在均为负氮后变为正和磷在1990年代中期。

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