闽江河口短叶茳芏湿地CH4和N2O排放对氮输入的短期响应

YIC-IR

	闽江河口短叶茳芏湿地CH4和N2O排放对氮输入的短期响应
其他题名	Short-term Effects of Exogenous Nitrogen on CH4 and N20 Effluxes from Cyperus malaccensis Marsh in the Min River Estuary
	牟晓杰 1; 刘兴土 1; 仝川 2; 孙志高3
发表期刊	环境科学
ISSN	0250-3301
	2012
卷号	33.0 期号:007 页码:2482-2489
关键词	CH4 N20 氮输入滨海湿地闽江口
英文摘要	利用静态箱-气相色谱法，研究了氮输入对闽江河口短叶茳芏湿地CH4和N2O排放通量的短期影响．结果表明，高氮输入在不同采样时间均促进了湿地CH。排放，低氮输入在不同时间则具有不同的变化特征．与对照处理相比，低氮和高氮2种处理分别使湿地CH4排放通量增加了-44．35％-1057．35％和7．15％-667．37％．外源氮输入在24h内对湿地N2O排放通量具有明显的正激发效应，最高可增加171．60倍和177．79倍，但在8d后，氮输入对湿地N2O排放的激发效应减弱甚至消失．氮输入在短时间内对湿地土壤Ec、pH和Eh均未产生显著影响．湿地CH4排放通量在对照处理下仅与5cmEh存在显著负相关，在低氮处理下仅与10cm地温呈显著负相关，在高氮处理下则与5cmEe、0、5cmpH以及0、5、10cm土壤Eh均呈显著相关性，而N2O排放通量在不同处理下与湿地气温、地温、盐度、pH和Eh等环境因子均不存在显著相关性．研究表明，探讨氮输入对湿地温室气体排放的影响应考虑其时间变异性．
中文摘要	Using static chamber-GC techniques, the shorHerm effects of nitrogen input on the emission fluxes of CH4and N20 from a Cyperus malaccensis wetland were determined. The results showed that the emission of CH4 was increased by high nitrogen input at all sampling times, whereas the low nitrogen input exhibited different variation characteristics at different time points. Compared to the control treatment, the CH4emission flux in the two nitrogen input treatments （N1, N2） was increased by -44. 35%- 1 057.35% and 7. 15%-667.37% , respectively. The input of exogenous nitrogen had positive priming effect on N20 emission flux within 24 hours, increased by up to 171.60 folds and 177.79 folds, respectively. After 8 days, the priming effect by the nitrogen input weakened or disappeared. There was no significant effect of nitrogen input on the Ec, pH and Eh of soil at different depths in the salt marsh during the experiment. In the control treatment, the CH4 emission flux was negatively correlated solely with Eh of soil at 5 cm depth, whereas in the N1 treatment, it was negatively correlated solely with soil temperature at 10 cm depth. In the N2 treatment, there was negative correlation between the CH4emission flux and Ec of soil at 5cm depth, pH of soil at 0, 5 cm depths, and Eh of soil at 0, 5, 10 cm depths. However, no significant correlation between the N20 emission flux and the environmental variables in the wetland was found. This study indicated that the temporal variability should be taken into consideration when examining the effects of nitrogen input on the emission of greenhouse gases in the wetlands.
收录类别	CSCD
语种	中文
CSCD记录号	CSCD:4562048
引用统计
文献类型	期刊论文
条目标识符	http://ir.yic.ac.cn/handle/133337/35024
专题	中国科学院烟台海岸带研究所
作者单位	1.中国科学院东北地理与农业生态研究所 2.福建师范大学 3.中国科学院烟台海岸带研究所
推荐引用方式 GB/T 7714	牟晓杰,刘兴土,仝川,等. 闽江河口短叶茳芏湿地CH4和N2O排放对氮输入的短期响应[J]. 环境科学,2012,33.0(007):2482-2489.
APA	牟晓杰,刘兴土,仝川,&孙志高.(2012).闽江河口短叶茳芏湿地CH4和N2O排放对氮输入的短期响应.环境科学,33.0(007),2482-2489.
MLA	牟晓杰,et al."闽江河口短叶茳芏湿地CH4和N2O排放对氮输入的短期响应".环境科学 33.0.007(2012):2482-2489.