南京林业大学学报(自然科学版) ›› 2012, Vol. 36 ›› Issue (02): 117-120.doi: 10.3969/j.jssn.1000-2006.2012.02.024

• 城镇绿地特殊生境生态修复关键技术研究专栏 • 上一篇    下一篇

模拟暴雨条件下杨麦复合系统氮、磷随地表径流流失特征分析

刘晓凯,薛建辉*,吴永波   

  1. 南京林业大学森林资源与环境学院,江苏省林业生态工程重点实验室,江苏 南京 210037
  • 出版日期:2012-04-10 发布日期:2012-04-10
  • 基金资助:
    收稿日期:2011-01-26 修回日期:2011-09-08 基金项目:“十一五”国家科技支撑计划(2008BAJ10B04) 第一作者:刘晓凯,硕士生。*通信作者:薛建辉,教授。E-mail:jhxue@njfu.com.cn。引文格式:刘晓凯,薛建辉,吴永波. 模拟暴雨条件下杨麦复合系统氮、磷随地表径流流失特征分析[J]. 南京林业大学学报:自然科学版,2012,36(2):117-120.

Nitrogen and phosphorus losses mechanisms from agro-forestry system under simulated rainfall conditions

LIU Xiaokai, XUE Jianhui*,WU Yongbo   

  1. Jiangsu Key Laboratory of Forestry Ecological Engineering, College of Forest Resources and Environment, Nanjing Forestry University,Nanjing 210037,China
  • Online:2012-04-10 Published:2012-04-10

摘要: 通过模拟降雨径流实验,在1.43 mm/min暴雨条件下,研究杨麦复合系统对氮、磷流失量、径流量和泥沙侵蚀量的影响及杨麦复合系统氮、磷随地表径流的流失特征。结果表明:杨麦复合系统与普通农田相比总氮流失量减少54.9%~89.1%、总磷流失量减少68.6%~88.9%、径流量减少56.7%~70.6%、泥沙侵蚀量减少52.1%~61.5%。杨麦复合系统地表径流中TN、DN的流失浓度先迅速下降然后上升; NO-3-N在产流初期浓度变化不大,产流后期浓度增大; NH+4-N、TP和PP有相同的浓度变化趋势,即在产流初期浓度达到最大值,随产流时间的延长呈下降趋势。氮主要以溶解态流失,磷主要以颗粒态流失。

Abstract: Nitrogen and phosphorus losses mechanisms from agro-forestry system was investigated in a rainfall simulation experiment with a constant rainfall rate of 1.43 mm /min. The results showed that agro-forestry systems can drop amounts of total nitrogen(54.9%-89.1%)and total phosphorus(68.6%-88.9%)carried away by runoff. Agro-forestry systems can reduce water runoff(56.7%-70.6%)and sediment(52.1%-61.5%). In agro-forestry system, the concentration of TN and DN is rapid decline, then rise. At the beginning of runoff, NO-3-N is stable, then close to be increase; NH+4-N, TP and PP have the same regular pattern. Their concentration is high in the initial time, tends to be decreased with rainfall continuing.

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