Yu Junbao, Ning Kai, Li Yunzhao, Du Siyao, Han Guangxuan, Xing Qinghui, Wu Huifeng, Wang Guangmei, Gao Yongjun
Key Laboratory of Coastal Zone Environmental Processes and Ecological Remediation, Yantai Institute of Coastal Zone Research (YIC), Chinese Academy of Sciences (CAS) and Shandong Provincial Key Laboratory of Coastal Zone Environmental Processes, YICCAS, Yantai 264003, China.
Key Laboratory of Coastal Zone Environmental Processes and Ecological Remediation, Yantai Institute of Coastal Zone Research (YIC), Chinese Academy of Sciences (CAS) and Shandong Provincial Key Laboratory of Coastal Zone Environmental Processes, YICCAS, Yantai 264003, China ; University of Chinese Academy of Sciences, Beijing 100049, China.
ScientificWorldJournal. 2014;2014:949213. doi: 10.1155/2014/949213. Epub 2014 Apr 1.
The ecological problems caused by dry and wet deposition of atmospheric nitrogen have been widespread concern in the world. In this study, wet and dry atmospheric depositions were monitored in plant growing season in the coastal zone of the Yellow River Delta (YRD) using automatic sampling equipment. The results showed that SO4 (2-) and Na(+) were the predominant anion and cation, respectively, in both wet and dry atmospheric depositions. The total atmospheric nitrogen deposition was ~2264.24 mg m(-2), in which dry atmospheric nitrogen deposition was about 32.02%. The highest values of dry and wet atmospheric nitrogen deposition appeared in May and August, respectively. In the studied area, NO3 (-)-N was the main nitrogen form in dry deposition, while the predominant nitrogen in wet atmospheric deposition was NH4 (+)-N with ~56.51% of total wet atmospheric nitrogen deposition. The average monthly attribution rate of atmospheric deposition of NO3 (-)-N and NH4 (+)-N was ~31.38% and ~20.50% for the contents of NO3 (-)-N and NH4 (+)-N in 0-10 cm soil layer, respectively, suggested that the atmospheric nitrogen was one of main sources for soil nitrogen in coastal zone of the YRD.
大气氮干湿沉降所引发的生态问题已受到全球广泛关注。本研究利用自动采样设备，在黄河三角洲（YRD）海岸带植物生长季对大气干湿沉降进行了监测。结果表明，在大气干湿沉降中，SO4(2-)和Na(+)分别是主要的阴离子和阳离子。大气氮总沉降量约为2264.24 mg m(-2)，其中干大气氮沉降约占32.02%。干、湿大气氮沉降的最高值分别出现在5月和8月。在研究区域，干沉降中主要的氮形态是NO3(-)-N，而湿大气沉降中主要的氮是NH4(+)-N，占湿大气氮总沉降量的~56.51%。0 - 10 cm土层中NO3(-)-N和NH4(+)-N含量的大气沉降平均月贡献率分别约为31.38%和20.50%，这表明大气氮是黄河三角洲海岸带土壤氮的主要来源之一。
