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文章摘要

典型蔬菜种植区及周边地下水硝酸盐分布现状和来源分析

Analysis on Distribution and Sources of Nitrates in Groundwater in and around Typical Vegetable Planting Area

DOI：

英文关键词: Nitrate Distribution status Source analysis Groundwater Vegetable planting area Weifang

基金项目:国家重点研发计划基金资助项目（2023YFC3708900）

作者	单位
石瑞卿	山东省潍坊生态环境监测中心
鞠铁男	中国科学院地理科学与资源研究所；中国科学院大学
谢银凤	山东省潍坊生态环境监测中心
杜源凯	山东省潍坊生态环境监测中心
刘全波	山东省潍坊生态环境监测中心
马云云	山东省海洋化工科学研究院

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中文摘要:

以潍坊市为研究区，设置103个地下水监测点，结合水化学分析、土地利用类型和自组织映射神经网络聚类等方法研究典型蔬菜种植区及周边〖JP2〗地下水硝酸盐现状及来源。结果表明：研究区地下水NO-3-N均值为（3697±3053）mg/L，〖JP〗超过《地下水质量标准》（GB/T 14848—2017）Ⅳ类标准，点位超标率为524%，超标区域主要位于潍坊市中部和西北部地区，超标面积占比为458%；耕地主导影响型地下水NO-3-N质量浓度显著高于人造地表主导影响型，两者的均值分别为（3923±3204）mg/L、（3063±2530）mg/L，而Cl-质量浓度则相反，两者的均值分别为（15616±11159）mg/L、（21681±8376）mg/L；地下水硝酸盐来源主要为农业施肥，其次为生活污水/粪便排放。建议采用科学合理的施肥方式，减少过量施肥，设置生态缓冲带，减缓硝酸盐的流失，提高生活污水收集处理能力。

英文摘要:

Taking Weifang as the research area， based on the analysis results of groundwater samples from 103 monitoring sites， land use types and self organizing mapping neural network clustering method， the current situation and sources of nitrate in groundwater in and around a typical vegetable planting area was studied. The results showed that the average concentration of NO-3 N in groundwater in the research area was（36.97±30.53 ）mg/L， exceeding the Class Ⅳ limit value in “Standard for Groundwater Quality（GB/T 14848—2017）”. The rate of sites exceeding the standard was 524%. The areas exceeding the standard were mainly located in the central and northwestern regions of Weifang， accounting for 45.8%. The influence of cultivated land on the mass concentration of NO-3 N in groundwater was significantly higher than that of artificial surface land，〖JP2〗the average of NO-3 N mass concentration 〖JP3〗in the two types of land were（3923±32.04 ）mg/L〖JP〗 and（3063±2530）mg/L， respectively， meanwhile its influence on the mass concentration of Cl- was significantly lower than that of artificial surface land， the average 〖GK!87mm〗of Cl- mass concentration in the two were（15616±11159）mg/L and（21681±8376）mg/L， respectively. The main source of nitrate in groundwater was agricultural fertilization， followed by the discharge of domestic sewage/feces. It suggested adopting scientific and reasonable fertilization methods，〖HK〗eliminating 〖HK〗excessive fertilization， setting up ecological buffer zones， reducing the loss of nitrate and improving the capacity of collecting and treating domestic sewage.

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