黄河三角洲滨海地区植物生长季大气氮沉降动态

doi:10.13249/j.cnki.sgs.2015.02.218

地理科学 ›› 2015, Vol. 35 ›› Issue (2): 218-223.doi: 10.13249/j.cnki.sgs.2015.02.218

黄河三角洲滨海地区植物生长季大气氮沉降动态

宁凯^1,2,3, 于君宝^1,2, 屈凡柱^1,2,3, 王光美^1,2, 管博^1,2

1. 中国科学院烟台海岸带研究所, 中国科学院海岸带环境过程与生态修复重点实验室, 山东省海岸带环境过程重点实验室, 山东烟台264003;
2. 山东省海岸带环境过程重点实验室, 山东烟台264003;
3. 中国科学院大学, 北京100049

收稿日期:2014-01-25 修回日期:2014-04-18 出版日期:2015-02-20 发布日期:2015-02-20
通讯作者: 于君宝,研究员.E-mail:junbao.yu@gmail.com E-mail:junbao.yu@gmail.com
作者简介:宁凯(1986-),男,博士研究生,主要从事生物地球化学研究.E-mail:kning@aliyun.com
基金资助:
十二五国家科技支撑计划项目(2011BAC02B01)、山东省自然科学杰出青年基金项目(JQ201114)和中国科学院国家外国专家局创新团队国际合作伙伴计划项目(Y02A071041)资助.

Atmospheric Nitrogen Deposition During Growing Season in Coastal Zone of the Yellow River Delta

NING Kai^1,2,3, YU Jun-bao^1,2, QU Fan-zhu^1,2,3, WANG Guang-mei^1,2, GUAN Bo^1,2

1. Key Laboratory of Coastal Zone Environmental Processes and Ecological Remediation, Chinese Academy of Sciences, Shandong Provincial key Laboratory of Coastal Environmental Processes, Yantai Institute of Coastal Zone Research, Chinese Academy of Sciences, Yantai, Shandong 264003, China;
2. Shandong Provincial Key Laboratory of Coastal Zone Environmental Processes, Yantai, Shandong 264003, China;
3. University of Chinese Academy of Sciences, Beijing 100049, China

Received:2014-01-25 Revised:2014-04-18 Online:2015-02-20 Published:2015-02-20

摘要/Abstract

摘要：

利用SCJ-302型降水降尘自动采样器在植物生长季对黄河三角洲滨海湿地的大气氮沉降进行监测,对沉降物中水溶性离子、干、湿沉降氮输入量、铵态氮和硝态氮在总沉降量中的贡献率及月变化动态等分析表明:黄河三角洲植物生长季,大气干、湿沉降中SO₄^2-和NO^3-占阴离子总量的92%以上,和Na⁺和Ca²⁺占阳离子总量的80%以上,总N沉降量约为2 264.24 mg/m²,且69%集中在降雨量较丰沛的6~8 月.其中干沉降氮贡献率约为32.02%,主要集中在春季.N的湿沉降量与降雨量呈显著正线性相关(R²=0.82),在降雨量丰沛的8 月,达到最大值675.64 mg/m².该地区大气干沉降的氮素形态以硝态氮为主,约占氮素输入量的57.21%,湿沉降中以铵态氮为主,约占氮素输入量的56.51%.植物生长季中,大气沉降中的硝态氮与铵态氮含量对表层10 cm土壤的月平均贡献率分别为约31.38%和20.50%,可见大气氮沉降是黄河三角洲滨海区域土壤主要氮素来源之一.

关键词: 硝态氮, 黄河三角洲, 大气干、湿沉降, 铵态氮

Abstract:

Wet and dry atmospheric depositions were monitored in plant growing season in coastal wetland of Yellow River Delta using SCJ-302 model automatic sampling equipment. The water-soluble ions, wet and dry atmospheric N depositions, monthly variation and the proportion of NH₄⁺-N and NO₃^--N in total nitrogen deposition were analyzed. The results showed that SO₄^2-and NO₃^- accounted for more than 92% of the anion numbers, Na⁺ and Ca²⁺ accounted for more than 80% of the cation numbers, respectively, in wet and dry atmospheric depositions in growing season in the Yellow River Delta. The total atmospheric nitrogen deposition was about 2 264.24 mg/m², and 69% of it occurred from June to August in which the precipitation was abundant. In the total atmospheric nitrogen deposition, dry atmospheric nitrogen deposition accounted for about 32.02%, and it was high in spring. The significant positive relationship between wet nitrogen deposition and precipitation was observed in the study (R²=0.82). The wet atmospheric nitrogen deposition reached peak value in August (675.64 mg/m²). In the studied area, the predominant nitrogen in dry atmospheric deposition was NO₃^--N with about 57.21% of total dry atmospheric nitrogen deposition, while the predominant nitrogen in wet atmospheric deposition was NH₄⁺-N with about 56.51% of total wet atmospheric nitrogen deposition. In plant growing season, the average monthly attribution rate of atmospheric deposition of NO₃^--N and NH₄⁺-N were about 31.38% and 20.50% for the contents of NO₃^--N and NH₄⁺-N in 10 cm soil layer, respectively. Therefore, the atmospheric nitrogen was one of main sources for soil nitrogen in coastal zone of Yellow River Delta.

Key words: NO₃^--N, the Yellow River Delta, NH₄⁺-N, dry and wet atmospheric deposition

中图分类号:

宁凯, 于君宝, 屈凡柱, 王光美, 管博. 黄河三角洲滨海地区植物生长季大气氮沉降动态[J]. 地理科学, 2015, 35(2): 218-223.

NING Kai, YU Jun-bao, QU Fan-zhu, WANG Guang-mei, GUAN Bo. Atmospheric Nitrogen Deposition During Growing Season in Coastal Zone of the Yellow River Delta[J]. SCIENTIA GEOGRAPHICA SINICA, 2015, 35(2): 218-223.

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黄河三角洲滨海地区植物生长季大气氮沉降动态

Atmospheric Nitrogen Deposition During Growing Season in Coastal Zone of the Yellow River Delta

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