东道海子表层沉积物氮营养盐及有机质分布及评价

发布时间：2018-01-25 08:32

本文关键词： 东道海子表层沉积物总氮有机质有机污染　出处：《新疆农业大学学报》2016年04期 　论文类型：期刊论文

【摘要】：采集了新疆乌鲁木齐东道海子表层沉积物,研究了沉积物中氮营养盐和有机质的含量并进行评价。结果表明,东道海子表层沉积物枯水期总氮含量总体较平水期高,且枯水期氨氮占总氮含量百分比总体较平水期低,枯水期表层沉积物总氮平均含量为5 176 mg/kg,介于2 177~6 447 mg/kg;有机质平均含量659 mg/kg,介于357~968mg/kg。平水期表层沉积物总氮平均含量3 890 mg/kg,介于3 355~5 209 mg/kg;有机质平均含量3 647mg/kg,介于2 320~4 814 mg/kg。丰水期表层沉积物中总氮平均含量为960 mg/kg,介于590~1 654mg/kg;有机质平均含量5 299mg/kg,介于2 660~8 543mg/kg。枯水期有机氮污染最为严重,丰水期主要由于降雨和冰川融水补给水源,总氮含量明显下降。有机质含量主要与渔民养殖鱼类有关,鱼类的残饵和排泄物的不断沉降、积累使有机质含量在丰水期鱼类养殖旺季达到最高值。总磷、总有机碳含量均处于安全限值之内,东道海子主要污染为氮营养盐污染,且污染严重,东道海子今后的研究应对氮营养盐予以重视。
[Abstract]:The surface sediments of Dongdaohaizi in Urumqi Xinjiang were collected and the contents of nitrogen nutrients and organic matter in the sediments were studied and evaluated. The total nitrogen content of surface sediments in Dongdao-Haizi was higher than that in normal water period, and the percentage of ammonia nitrogen in total nitrogen content in dry season was lower than that in flat water period. The average content of total nitrogen in surface sediments during dry season was 5 176 mg / kg, which ranged from 2 177 mg / kg to 6 447 mg / kg; The average content of organic matter is 659 mg / kg, which is between 357 and 968 mg / kg. The average total nitrogen content of surface sediments in the plain water period is 3 890 mg/kg. Between 3 355 and 5 209 mg / kg; The average content of organic matter was 3 647 mg / kg, which ranged from 2 320 mg / kg to 4 814 mg / kg. The average content of total nitrogen in surface sediments in high water period was 960 mg/kg. Between 590 mg / kg and 1654 mg / kg; The average content of organic matter is 5 299 mg / kg, which is between 2 660 mg / kg and 8 543 mg / kg. The pollution of organic nitrogen is the most serious in dry season, which is mainly due to rainfall and glacial water recharge in high water season. The content of organic matter was mainly related to the fish cultured by fishermen. The accumulation of residual bait and excreta of fish resulted in the highest content of organic matter in the peak season of fish culture in the high water season. The total organic carbon content is within the safe limit. The main pollution of Dongdaozi is nitrogen nutrient pollution, and the pollution is serious. The future study of Dongdaohaizi should pay more attention to nitrogen nutrient salt.
【作者单位】：新疆农业大学草业与环境科学学院;新疆环境保护科学研究院新疆环境污染监控与风险预警重点实验室;
【基金】：新疆维吾尔自治区自然科学基金项目(2015211B025)
【分类号】：X524;X824
【正文快照】： 险预警重点实验室,乌鲁木齐830063)(1.College of Pratacultural and Environmental Sciences,Xinjiang Agricultural University,Urumqi830000,China;2.Xinjiang Adcademy of Environmental Protection Science/Xinjiang Key Labora-tory for Environmental Pollution Monito

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