| 环太湖丘陵地区农田氮素随地表径流输出特征 |
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| 引用本文： | 王鹏,高超,姚琪,韩龙喜,申霞. 环太湖丘陵地区农田氮素随地表径流输出特征[J]. 生态与农村环境学报, 2005, 21(2): 46-49 |
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| 作者姓名： | 王鹏 高超 姚琪 韩龙喜 申霞 |
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| 作者单位： | 1. 河海大学环境科学与工程学院,江苏,南京,210098
2. 南京大学城市与资源学系,江苏,南京,210093 |
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| 基金项目： | 国家自然科学基金重点项目 (50239030 )，江苏省自然科学基金资助项目(BK2001017) |
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| 摘 要： | 对环太湖丘陵地区农田氮素随地表径流的输出特征进行了研究,结果表明,地表径流中TN浓度随径流量而变化,浓度峰值出现时间滞后于径流量峰值;径流发生前期,NH3 N和NO-3 N浓度水平相当,后期NO-3 N浓度缓慢抬升,而NH3 N含量缓慢下降;NO-2 N浓度相对较低,随时间快速下降;对于TN和NO-3 N而言,溶解态含量高于悬浮态,而溶解态和悬浮态NH3 N的浓度相当;无机氮平均浓度高于有机氮,有机氮尤其是悬浮态有机氮浓度表现出随径流量而变化的特点。
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| 关 键 词： | 地表径流 非点源污染 无机氮 有机氮 |
| 文章编号： | 1001-5906(2005)02-0046-04 |
| 修稿时间： | 2004-11-04 |
Nitrogen losses with surface runoff from farmlands in hilly areas around Tai Lake |
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| WANG Peng,GAO Chao,YAO Qi,HAN Long-xi,SHEN Xia. Nitrogen losses with surface runoff from farmlands in hilly areas around Tai Lake[J]. Journal of Ecology and Rural Environment, 2005, 21(2): 46-49 |
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| Authors: | WANG Peng GAO Chao YAO Qi HAN Long-xi SHEN Xia |
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| Affiliation: | WANG Peng~1,GAO Chao~2,YAO Qi~1,HAN Long-xi~1,SHEN Xia~1 |
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| Abstract: | Characteristics of nitrogen loss with surface runoff from farmlands in hilly areas around the Tai Lake were studied.The results indicate that the concentration of TN varied with surface runoff and its peak lagged behind that of the latter in time.At the prior period of runoff,NH_3-N and NO~-_3-N were similar in concentration,but later on NO~-_3-N rose while NH_3-N declined slowly.The concentrations of NO~-_3-N were relatively low and fell down quickly with the time.As for TN and NO~-_3-N,contents of the dissolved were higher than those of the suspended,whereas in the case of NH_3-N concentration,the dissolved was equivalent to that of the suspended.The average content of inorganic nitrogen weighted by runoff was higher than organic nitrogen.Organic nitrogen,especially the suspended form,showed the characteristic of varying with the flux of runoff. |
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| Keywords: | overland runoff non-point source pollution inorganic nitrogen organic nitrogen |
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