川中丘陵区小流域非点源氮素迁移的季节特征——以中国科学院盐亭紫色土农业生态试验站小流域为例  

Seasonal Variation of Non-point Source Nitrogen Movement in Small Watershed in the Hilly Area of the Central Sichuan Basin——A Case Study in the Watershed of Yanting Agro-ecological Experimental Station of Purple Soil,CAS

作　　者：况福虹[1] 朱波[1] 徐泰平[1] 汪涛[1] 武永峰[1] 

机构地区：[1]中国科学院成都山地灾害与环境研究所

出　　处：《水土保持研究》2006年第5期93-95,98,共4页Research of Soil and Water Conservation

基　　金：中国科学院野外台站基金知识和创新工程项目(KZCX2-413);四川省青年科技基金资助

摘　　要：通过分析川中丘陵区典型小流域主排水沟不同部位氮素浓度随季节变化的特征,结果表明NO3--N和NH4+-N浓度随季节变化特征明显,但浓度变化波动大。NH4+-N浓度春季最高,达到2.11 mg/L,NO3--N浓度秋季最高,达到7.12 mg/L,与总氮浓度有显著相关关系。TON浓度随季节变化特征不明显,受人类活动影响大,TN浓度随季节变化波动较小,从上游到出口处经过河流自净作用能明显降低。Seasonal variation and movement of nitrogen in different location of main drain were analysed m a typital small watershed in the hilly area of the central Sichuan Basin. Results showed that the concentration of NO3^- -N and NH4^ ＋ -N varied with season change,but it was fluctuated greatly. Concentration of NH^4 ＋ -N was the highest in spring which was 2.11 mg/L. Concentration of NO3^ - - N was the highest in autumn which was 7.12mg/L and it was correlated significantly with TN. Variation was not obvious and TON was influenced by human beings. Concentration of TN was relatively stable and could be diluted naturally by self-refine.

关 键 词：小流域 氮 非点源污染 

分 类 号：S181[农业科学—农业基础科学] S153.61