氮沉降对黄河三角洲芦苇湿地土壤呼吸的影响

	氮沉降对黄河三角洲芦苇湿地土壤呼吸的影响
其他题名	Effect of nitrogen deposition on soil respiration in Phragmites australis wetland in the Yellow River Delta, China
	朱敏 ; 张振华 ; 于君宝 ; 吴立新 ; 韩广轩 ; 杨利琼 ; 邢庆会 ; 谢宝华 ; 毛培利 ; 王光美
发表期刊	植物生态学报
ISSN	1005-264X
	2013-06-01
卷号	37 期号:6 页码:517-529
关键词	氮沉降芦苇湿地土壤呼吸黄河三角洲
产权排序	鲁东大学地理与规划学院;中国科学院海岸带环境过程与生态修复重点实验室;中国科学院烟台海岸带研究所;黄河三角洲国家级自然保护区管理局;
通讯作者	韩广轩 E-mail: gxhan@yic.ac.cn
作者部门	中科院海岸带环境过程与生态修复重点实验室
英文摘要	2012年6月至2012年10月,对黄河三角洲芦苇(Phragmites australis)湿地进行了模拟氮沉降试验,氮沉降水平分别为对照(CK,0kgN·hm–2·a–1)、低氮(LN,50kgN·hm–2·a–1)和高氮(HN,100kgN·hm–2·a–1)。利用LI-8100土壤碳通量测量系统测定土壤呼吸速率。结果表明,氮沉降促进了芦苇湿地土壤呼吸作用,LN和HN处理使芦苇生长季(6–10月)平均土壤呼吸速率比CK分别提高19%和58%。积水改变了芦苇湿地土壤呼吸日动态。地面无积水时,各处理土壤呼吸日动态均呈单峰型曲线;地面有积水时,土壤呼吸日动态峰值推后或无单峰型波动规律。积水影响...
中文摘要	Aims Atmospheric nitrogen deposition derived from fossil-fuel combustion, fertilization, land clearing and biomass burning is occurring over almost the entire world. As an important ecosystem, wetland in industrialized regions has experienced greater rates of nitrogen deposition in recent decades. Our objectives were to determine the effect of increased nitrogen deposition on the diurnal and seasonal variation of soil respiration in a reed (Phragmites australis) wetland and to relate the variation to environmental and biological factors. Methods From June to October 2012, we conducted a simulated nitrogen deposition field experiment in a reed wetland in the Yellow River Delta, China. The levels of nitrogen deposition were control (CK), low nitrogen (LN) and high nitrogen (HN) with 0, 50 and 100 kg N·hm–2·a–1, respectively. Soil respiration was measured during the growing season by using a LI-8100 soil CO2 efflux system. Important findings Nitrogen deposition promoted soil respiration in the reed wetland during the entire growing season. Compared with CK, the LN and HN treatments increased the average rates of soil respiration by 19% and 58%, respectively. Surface ponding had a significant effect on the diurnal variation patterns of soil respiration. When there was no surface ponding, the diurnal variation of soil respiration in different treatments all showed “a unimodal” pattern. When surface ponding occurred, the diurnal variation of soil respiration did not show a unimodal pattern or the peak value of soil respiration rate was delayed. In addition, response of soil respiration to air temperature was affected by surface ponding. When there was no surface ponding, soil respiration exhibited a significantly positive exponential relationship with air temperature, which explained 69.9%, 64.5% and 59.9% of the seasonal variation of soil respiration in CK, LN and HN, respectively. However, there was no significant relationship between soil respiration and air temperature when surface ponding occurred. The Q10 (temperature sensitivity coefficients of soil respiration) of CK, LN and HN were 1.68, 1.75 and 1.68, respectively, suggesting that low nitrogen deposition increases the temperature sensitivity of soil respiration and high nitrogen deposition has no significant influence on it.
资助机构	国家科技支撑计划项目(2011BAC-02B01);; 国家自然科学基金项目(41271236);; 中国科学院知识创新工程重要方向项目(KZCX2-YW-223)
收录类别	CSCD
语种	中文
CSCD记录号	CSCD:4856608
引用统计
文献类型	期刊论文
条目标识符	http://ir.yic.ac.cn/handle/133337/6532
专题	中国科学院海岸带环境过程与生态修复重点实验室
推荐引用方式 GB/T 7714	朱敏,张振华,于君宝,等. 氮沉降对黄河三角洲芦苇湿地土壤呼吸的影响[J]. 植物生态学报,2013,37(6):517-529.
APA	朱敏.,张振华.,于君宝.,吴立新.,韩广轩.,...&王光美.(2013).氮沉降对黄河三角洲芦苇湿地土壤呼吸的影响.植物生态学报,37(6),517-529.
MLA	朱敏,et al."氮沉降对黄河三角洲芦苇湿地土壤呼吸的影响".植物生态学报 37.6(2013):517-529.

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