沂源县田庄水库农业面源氮素淋滤行为研究

受农业面源影响，典型山区水库-田庄水库氮素超标，通过模拟土壤在不同降雨强度与不同降雨类型下的淋滤行为，探讨氮素淋溶释放规律，并对田庄水库农业面源氮素入库量进行了计算。结果表明，降雨类型和降雨强度只影响土壤中氨氮峰值浓度出现的时间，对其数值影响不大，由于土壤中硝氮含量较高，使降雨强度和类型对其淋出液中的硝氮峰值浓度产生的时间和数值都有所影响；农业面源氮污染通过田庄水库四条入库河流年均排入水库中的硝氮总量高达604．49t，氨氮为23．85t。

Research on Nitrogen Leaching Actions of Agriculture in Tianzhuang Reservoir in Yiyuan County

The nitrogen exceeds the quality standards for surface waters in the Tianzhuang Reservoir influenced by the agricultural non - point pollution. In this paper, the leaching experiments of soils under the conditions of different rainfall types and intensities were conducted to explore the characteristics of nitrogen release. In addition, the pollution loadings of nitrogen from the watersheds of the Tianzhuang Reservoir were calculated. The results indicate that the time of peak emergence of ammonium concentration in the leaehates was affected by the rainfall types and intensities, but the values of ammonium were not influenced. The values and the peak - emergence time of nitrate in the leachates were affected by the rainfall types and intensities. 604.49t nitrate and 23.85t ammonium from the watersheds are taken to the reservoir according to the four inflows of the Tianzhuang Reservoir.