| 引用本文: | 刘方平,向爱农,才硕,等.南方稻田灌排系统生态整治效应分析[J].灌溉排水学报,2019,38(4):116-121. |
| LIU Fangping,XIANG Ainong,CAI Shuo,et al.南方稻田灌排系统生态整治效应分析[J].灌溉排水学报,2019,38(4):116-121. |
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| 摘要: |
| 【目的】探明稻田水肥调控和灌排系统生态整治效应。【方法】于2014年在江西省赣抚平原灌区选取典型村庄—礼坊自然村，进行了稻田水肥高效利用综合调控技术应用，并对排水沟塘进行了生态改造，分别对早、晚稻灌水、排水和产量以及生态沟塘进出水进行分析。【结果】水稻田间水肥高效利用综合调控技术较当地农民习惯水肥管理模式节水、减排、增产和灌溉水生产率分别提高10.58%、20.34%、6.52%和18.59%，总氮和总磷减排率分别达12.37%和14.98%；排水斗、支沟经生态改造后对总氮和总磷的综合去除率达25.42%和34.22%；生态塘对总氮和总磷的去除率达25.19%和30.42%；示范区生态改造一次性投资需1.15万元/hm2，年运行管理费需0.18万元/hm2，年产经济效益达0.55万元/hm2。【结论】水稻田间水肥高效利用综合调控技术和生态沟、塘均有较好的氮、磷去除效果，并且建设运行经费投入少，建议当地加强技术的宣传示范推广，建立可持续运行的经费投入渠道。 |
| 关键词: 稻田； 灌排系统； 面源污染； 生态整治； 赣抚平原 |
| DOI：10.13522/j.cnki.ggps.2017.0187 |
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| Improving Contaminant Attenuation by Ecologically Innovating Irrigation and Drainage System at Paddy Field in Southern China |
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LIU Fangping, XIANG Ainong, CAI Shuo, SHI Hong, DENG Hailong, XU Tao, XU Yaqun
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1. Jiangxi Center Station of Irrigation Experiment, Nanchang 330201, China；2. Jiangxi Authority of Water Conservancy Project of the Ganfu Plain, Nanchang 330096, China
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| Abstract: |
| 【Objective】The aim of this paper is to analyze the efficacy of ecologically renovating irrigation and drainage system in improving contaminant attenuation in farmland.【Method】The experiment was conducted at paddy field in a village located in the Irrigation District of Ganfu Plain, where we optimized fertilizer application and irrigation and ecologically revamped its irrigation/drainage system in 2014. During the experiment, we measured irrigation amount, yield of rice, as well as the inflow and outflow in the drainage ditch and ponds.【Result】Optimizing fertilization and irrigation, along with irrigation and drainage renovation, saved water by 10.58%, reduced emission by 20.34%, and increased yield and water productivity by 6.52% and 18.59%, respectively, compared with business as usual. The reduction in total nitrogen (TN) loss and total phosphorus (TP) loss from leaching was 12.37% and 14.98%, respectively. The removal rate of TN and TP in lateral and branch ditches increased by 25.42% and 34.22% respectively; and the removal rate of TN and TP from the ponds improved by 25.19% and 30.42%, respectively. Analysis revealed that, considering the 11 500 Yuan/hm2 cost for renovation and 1 800 Yuan/hm2 cost for annual management, the net profit was 5 500 Yuan/hm2. 【Conclusion】 Optimizing fertilization and irrigation, along with facility renovation, improved the removal rate of total nitrogen (TN) and total phosphorus (TP), and reduced operational costs in the meantime. |
| Key words: paddy field; irrigation and drainage system; non-point source pollution; ecological remediation; Ganfu Plain |
