|
|
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 HydrologyWater 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) |
|
|
Abstract The change in nitrogen concentration and distribution feature of carbontonitrogen 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 carbontonitrogen 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 carbontonitrogen ratio on the Nitrogen removal efficiency is little under a controlled irrigation and drainage condition.
|
Received: 17 April 2012
Published: 30 September 2012
|
|
|
|
[1]董蓓蓓, 马淑花, 曹宏斌,等 我国农田总氮流失影响因素分析 [J]. 农业环境科学学报, 2011,30(10): 2040-2045.Dong Beibei, Ma Shuhua, Cao Hongbin, et al. Investigations into the farmland total Nitrogen loss in China [J]. Journal of AgroEnvironment Science, 2011,30(10): 2040-2045.(in Chinese)[2]Hollinger E, Cornish P S, Baginska B, et al. Farmscale stormwater losses of sediment and nutrients from a market garden near Sydney, Australia[J]. Agricultural Water Management, 2001, 47(3): 227-241.[3]司友斌, 王慎强, 陈怀满. 农田氮、磷的流失与水体富营养化 [J]. 土壤, 2000,32(4): 188-193.Si Youbin,Wang Shenqiang,Chen Huaiman.Nitrogen,phosphorus loss from farmland and eutrophication[J].Soils,2000,32(4):188-193.(in Chinese)[4]闫丽珍, 石敏俊, 王磊. 太湖流域农业面源污染及控制研究进展[J]. 中国人口资源与环境, 2010,20(1): 99-107.Yan Lizhen, Shi Minjun, Wang Lei. Review of agricultural nonpoint pollution in Taihu Lake and Taihu Basin[J] China Population, Resources and Environment,2010,20(1): 99-107. (in Chinese)[5]章明奎, 王阳, 黄超. 水网平原地区不同种植类型农田氮磷流失特征[J]. 应用生态学报, 2011,22(12): 3211-3220.Zhang Mingkui, Wang Yang,Huang Chao. Characteristics of nitrogen and phosphorus runoff losses from croplands with different planting patterns in a riverine plain area of Zhejiang Province,East China[J]. Chinese Journal of Applied Ecology, 2011,22 (12): 3211-3220. (in Chinese)[6]高焕芝, 彭世彰, 茆智, 等. 不同灌排模式稻田排水中氮磷流失规律[J]. 节水灌溉, 2009 (9): 1-3,7.Gao Huanzhi,Peng Shizhang, Mao Zhi, et al. N and P losses in surface drainage from paddy field under different irrigation and drainage modes[J]. Water Saving Iirrigation, 2009 (9): 1-3,7. (in Chinese)[7]罗纨, 贾忠华, 方树星, 等. 灌区稻田控制排水对排水量及盐分影响的试验研究 [J]. 水利学报, 2006,37(5): 608-612,618.Luo Wan, Jia Zhonghua, Fang Shuxing, et al. Effect of drainage control on salt and water balance in rice field [J]. Journal of Hydraulic Engineering, 2006,37(5): 608-612,618. (in Chinese)[8]王南江. 宁夏银南灌区采用控制排水减少农业氮流失的研究[D].西安:西安理工大学水利水电学院,2005.[9]Yoon KS, Cho JY, Choi JK, et al. Water management and N, P losses from paddy fields in Southern Korea [J]. JAWRA Journal of the American Water Resources Association, 2006, 42(5): 1205-1216.[10]杨林章, 周小平, 王建国, 等. 用于农田非点源污染控制的生态拦截型沟渠系统及其效果[J]. 生态学杂志, 2005,24(11): 121-124.Yang Linzhang,Zhou Xiaoping,Wang Jianguo, et al. Ecological ditch system with interception function and its effects on controlling farmland nonpoint pollution [J]. Chinese Journal of Ecology,2005,24(11): 121-124. (in Chinese)[11]Koskiaho J, Ekholm P, R TY M, et al. Retaining agricultural nutrients in constructed wetlands—Experiences under boreal conditions[J]. Ecological Engineering, 2003, 20(1): 89-103.[12]Moore M T, KR GER R, Locke M A, et al. Nutrient mitigation capacity in Mississippi Delta, USA drainage ditches[J]. Environmental Pollution, 2010, 158(1): 175-184.[13]彭世彰, 张正良, 罗玉峰,等. 灌排调控的稻田排水中氮素质量浓度变化规律 [J]. 农业工程学报, 2009,25 (9): 21-26.Peng Shizhang,Zhang Zhengliang,Luo Yufeng, et al. Variation of nitrogen concentration in drainage water from paddy fields under controlled irrigation and drainage[J]. Transactions of the CSAE, 2009,25 (9): 21-26. (in Chinese)[14]崔远来, 李远华, 吕国安, 等. 不同水肥条件下水稻氮素运移与转化规律研究 [J]. 水科学进展,2004,15(3): 280-285.Cui Yuanlai, Li Yuanhua, Lü Guoan, et al. Nitrogen movement and transformation with different water supply for paddy rice[J]. Advances in Water Science,2004,15(3): 280-285. (in Chinese)[15]张桂英,汪祖强. 苏南太湖地区农田水中COD的调查研究 [J]. 农村生态环境, 1994,10(2): 41-44.Zhang Guiying, Wang Zuqiang. Investigation on the COD balance in agricultural water of Taihu Lake region [J]. Rural Ecoenvironment, 1994,10(2): 41-44. (in Chinese)[16]赵联芳, 朱伟, 赵建. 人工湿地处理低碳氮比污染河水时的脱氮机理 [J]. 环境科学学报, 2006,26(11): 1821-1827.Zhao Lianfang, Zhu Wei, Zhao Jian. Nitrogen removal mechanism in constructed wetland used for treating polluted river water with lower ratio of carbon to nitrogen[J]. Acta Scientiae Circumstantiae, 2006,26(11): 1821-1827. (in Chinese)[17]彭世彰, 徐俊增. 水稻控制灌溉理论与技术 [M]. 南京: 河海大学出版社, 2011.[18]国家环境保护总局《水和废水监测分析方法》编委会. 水和废水监测分析方法[M]. 4版.北京: 中国环境科学出版社, 2002.[19]钱晓晴, 沈其荣, 徐勇,等. 不同水分管理方式下水稻的水分利用效率与产量[J]. 应用生态学报, 2003,14(3):399-404.Qian Xiaoqing,Shen Qirong,Xu Yong, et al. Water useefficiency and rice yield under different water managements [J]. Chinese Journal of Applied Ecology,2003,14 (3):399-404.(in Chinese)[20]Dierberg F E, Debusk T A, Jackson S D, et al. Submerged aquatic vegetationbased treatment wetlands for removing phosphorus from agricultural runoff: Response to hydraulic and nutrient loading [J]. Water Research, 2002, 36(6): 1409-1422. |
|
|
|