文章摘要
马凡凡,邢素林,徐云连,龚 娟,田 艳,马友华.巢湖圩区农田排水沟渠氮磷时空分布及输出特征[J].广东农业科学,2019,46(5):67-73
巢湖圩区农田排水沟渠氮磷时空分布及输出特征
Temporal and Spatial Distribution and Output Characteristics of Nitrogen and Phosphorus in Farmland Drainage Ditch in Polder Area around Chaohu Lake
  
DOI:10.16768/j.issn.1004-874X.2019.05.010
中文关键词: 圩区  沟渠  种植方式  径流  氮磷  水体富营养化
英文关键词: polder area  ditches  planting methods  runoff  nitrogen and phosphorus  water eutrophication
基金项目:国家科技支撑计划项目(2012BAD15B03)
作者单位
马凡凡,邢素林,徐云连,龚 娟,田 艳,马友华 安徽农业大学资源与环境学院安徽 合肥 230036 
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中文摘要:
      【目的】以巢湖圩区农田排水沟渠为研究对象,探讨圩区农田沟渠排水中氮磷的输出特征及时空 分布规律。【方法】在 2015—2016 年间对巢湖圩区农田排水沟渠不同断面进行取样监测,测定沟渠水体氮、磷 含量。【结果】该区域沟渠水体氨态氮(NH4 +-N)与硝态氮(NO3 --N)平均浓度分别为 1.1、1.3 mg/L,均超过 Ⅲ类水质标准;总氮(TN)浓度为 1.6~11.6 mg/L,TP 浓度为 0.1~1.0 mg/L,平均浓度分别超过Ⅴ类和Ⅳ类水质标准。 农田沟渠水体氮磷浓度季节变化明显,总磷(TP)和 NH4 +-N 浓度夏秋季节较低,TN 和 NO3 --N 则表现为春、 夏浓度较高,秋、冬较低的变化特征。【结论】农田排水沟渠对氮磷具有拦截净化作用,沟渠水体氮磷浓度由 高到低为蔬菜 - 水稻区沟渠、稻麦 - 居民区沟渠和稻麦种植区沟渠,圩区排水氮磷浓度略低于农田沟渠排水, 但高于受纳河流鸡裕河河水。
英文摘要:
      【Objective】Taking the farmland drainage ditches in the polder area of Chaohu Lake as the research object, the output characteristics and temporal and spatial distribution of nitrogen and phosphorus in the farmland drainage ditches in the polder area was explored.【Method】From 2015 to 2016, different sections of farmland drainage ditches in the polder area of Chaohu Lake were sampled and monitored, and the nitrogen and phosphorus contents of water in the ditches were determined. 【Result】 The results showed that the average concentrations of NH4 +-N and NO3 --N of water in the drainage ditches were 1.1 mg/L and 1.3 mg/L, respectively, which were above the class III water quality standard. The TN concentration was 1.6-11.6 mg/L, the TP concentration was 0.1-1.0 mg/L, and the average concentrations of TN and TP exceeded the class Ⅴ and Ⅳ water quality standards, respectively. The nitrogen and phosphorus concentrations in farmland ditches water change with season obviously. The concentrations of TP and NH4 +-N were lower in summer and autumn, and the concentrations of TN and NO3 --N were higher in spring and summer and lower in autumn and winter.【Conclusion】The farmland drainage ditch has the function of intercepting and purifying nitrogen and phosphorus. The nitrogen and phosphorus concentrations in the ditches of vegetable-rice area were highest, followed by those in ditches of rice-wheat-residential area and ditches of rice-wheat cultivation area. The concentrations of nitrogen and phosphorus in the drainage ditches of the polder area were slightly lower than those of the farmland ditches, but higher than those of the Jiyu River.
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