| 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 |
| |
| 引用本文： | 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. |
| |
| 作者姓名： | 刘晓凯 薛建辉 吴永波 |
| |
| 作者单位： | 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 |
| |
| 基金项目： | “十一五”国家科技支撑计划项目 |
| |
| 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;NO3--N在产流初期浓度变化不大,产流后期浓度增大;NH4+-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。
|
| 关 键 词： | 杨麦复合系统 氮磷流失 地表径流 人工降雨 |
Nitrogen and phosphorus losses mechanisms from agro-forestry system under simulated rainfall conditions |
| |
| LIU Xiaokai
,
XUE Jianhui
,
WU Yongbo.Nitrogen and phosphorus losses mechanisms from agro-forestry system under simulated rainfall conditions[J].Journal of Nanjing Forestry University(Natural Sciences ),2012,36(2):117-120. |
| |
| Authors: | LIU Xiaokai XUE Jianhui WU Yongbo |
| |
| Institution: | (Jiangsu Key Laboratory of Forestry Ecological Engineering,College of Forest Resources and Environment,Nanjing Forestry University,Nanjing 210037,China) |
| |
| 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. |
| |
| Keywords: | agro-forestry system nutrient and phosphorus losses runoff simulated rainfall |
| 本文献已被 CNKI 万方数据 等数据库收录！ |
|
