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长江天鹅洲浅层地下水氮磷特征
The Characteristic of Nitrogen and Phosphorus in Shallow Groundwater in the Swan Islet of Yangtze River

DOI: 10.12677/HJAS.2021.1110118, PP. 891-897

Keywords: 浅层地下水,氮磷含量,天鹅洲岛
Shallow Groundwater
, Nitrogen and Phosphorous Content, Swan Islet

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Abstract:

为了解生产生活对洲滩垸落浅层地下水的影响,探索湿地农区水资源保护的技术途径,分别于2014年4月和2015年4月在长江天鹅洲的居民点和农田采集浅层地下水水样,检测了其中氮磷含量,结果表明:居民区和农田的地下水污染均较严重,且农田有恶化趋势;研究区域氮素污染以铵态氮(1.15~5.54 mg?L?1)为主,且与总氮具有较高相关性(1%);地下水中总磷含量低(0.019~0.028 mg?L?1),不会造成污染。根据研究结果,在现行农业生产中要减施化学氮肥,推行节氮栽培势在必行。
In order to understand an impact of agricultural production and rural life on groundwater quality, and to explore technological way for water resources protection in rural area with wetlands, shallow groundwater samples were taken separately from farmland and residential zones in Swan Islet of Yangtze River in April 2014 and April 2015, the nitrogen and phosphorus contented in them were detected, the analysis results showed that: groundwater pollution is severe both residential area and farmland, moreover groundwater from farmland has a deteriorated tendency; in the study area, ammonium nitrogen (1.15~5.54 mg?L?1) is dominant in nitrogen pollution, and which has a significant correlation with total nitrogen at confidence level of 1%, conversely, phosphorus content in the groundwater is very low (only 0.019~0.028 mg?L?1), and that do not contaminate groundwater. Based upon research results, chemical nitrogen fertilizer should be reduced in current agriculture production, and nitrogen-saving cultivation is imperative.

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