排灌机械工程学报
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排灌机械工程学报  2012, Vol. 30 Issue (5): 609-613    DOI: 10.3969/j.issn.1674-8530.2012.05.023
农业水土工程 最新目录 | 下期目录 | 过刊浏览 | 高级检索 Previous Articles  |  Next Articles  
生态沟-湿地系统对稻田排水中氮素的去除效果
 和玉璞, 彭世彰, 徐俊增, 张剑刚, 焦健, 於家红
(1.河海大学水文水资源与水利工程科学国家重点实验室, 江苏 南京 210098; 2.江苏省昆山市水利技术推广站, 江苏 昆山 215300;3.江苏省昆山市锦溪镇水利站, 江苏 昆山 215324)
Removal effect of eco ditch and wetland system on nitrogen in paddy field drainage water
 HE  Yu-Pu, PENG  Shi-Zhang, XU  Jun-Zeng, ZHANG  Jian-Gang, JIAO  Jian, YU  Jia-Hong
(1.State Key Laboratory of HydrologyWater Resources and Hydraulic Engineering, Hohai University, Nanjing, Jiangsu 210098, China;2.Kunshan Promotional Station of Water Conservancy Technique in Jiangsu Province, Kunshan, Jiangsu 215300, China; 3.Jinxi Water Station in Kunshan, Jiangsu Province, Kunshan, Jiangsu 215324, China)
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摘要 为研究灌排调控下生态沟-湿地系统对稻田排水中氮素的原位削减效果,探讨低碳氮比对于系统氮素去除效果的影响.依据大田试验观测资料,分析了控制灌排模式下生态沟-湿地系统水体中氮素质量浓度变化规律和碳氮比分布特征.结果表明,控制灌排模式下生态沟-湿地系统对稻田排水中氮素去除效果显著,施肥后排水中TN, NH+4-N和NO-3-N质量浓度出现峰值,在农沟拦蓄后质量浓度大幅下降,氮素平均去除率分别为639%,678%和832%.进入湿地再次净化后,氮素质量浓度进一步降低,平均去除率分别为477%,443%和820%.控制灌排模式下系统水体中有机质对水环境影响较小,水体碳氮比水平总体偏低.控制灌排模式下生态沟-湿地系统很好地实现了对氮素的原位削减,低碳氮比对于系统氮素去除效果的影响不大.
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和玉璞
彭世彰
徐俊增
张剑刚
焦健
於家红
关键词生态沟-湿地系统   灌排调控   稻田   排水   氮素   碳氮比     
Abstract: The change in nitrogen concentration and distribution feature of carbontonitrogen ratio in the agricultural ditch and wetland system were analyzed based on the observed data in fields to investigate the nitrogen removal effect from drainage water in the system under a controlled irrigation and drainage condition. Results showed that TN,NH+4-N and NO-3-N concentrations in drainage were peaking after fertilization and then were significantly reduced after agricultural ditches were made to store water, causing 63.9% 67.8% and 83.2% nitrogen removal efficiencies in TN, NH+4-N and NO-3-N, respectively. The nitrogen concentration was reduced further after the drainage water was purified in wetlands, resulting in 47.7%, 44.3% and 82.0% average removal efficiencies for TN, NH+4-N and NO-3-N. Since the influence of organic matters on water quality is little under the controlled irrigation and drainage condition, a low carbontonitrogen ratio was maintained in general. The agricultural ditch and wetland system are effective in removing nitrogen in paddy field drainage water. However, the influence of low carbontonitrogen ratio on the Nitrogen removal efficiency is little under a controlled irrigation and drainage condition.
Key wordsecoditch and wetland   controlled irrigation and drainage   paddy field   drainage   nitrogen   carbontonitrogen ratio   
收稿日期: 2012-04-17; 出版日期: 2012-09-30
基金资助:

国家自然科学基金资助项目(50839002,51179049); “十二五”国家科技支撑计划项目(2012BAD08B04); 高等学校博士学科点专项科研基金资助项目(20110094110015)

通讯作者: 彭世彰(1959—),男,上海黄埔人,教授,博士生导师(通信作者,szpeng@hhu.edu.cn),主要从事节水灌溉理论及其农田生态效应研究.   
作者简介: 和玉璞(1987—),男,河南新乡人,博士研究生(heyupu28@163.com),主要从事节水灌溉理论及其农田生态效应研究.
引用本文:   
和玉璞,彭世彰,徐俊增等. 生态沟-湿地系统对稻田排水中氮素的去除效果[J]. 排灌机械工程学报, 2012, 30(5): 609-613.
HE Yu-Pu,PENG Shi-Zhang,XU Jun-Zeng et al. Removal effect of eco ditch and wetland system on nitrogen in paddy field drainage water[J]. Journal of Drainage and Irrigation Machinery Engin, 2012, 30(5): 609-613.
 
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