干旱区生态环境知识资源中心(Arid): 内蒙古荒漠草原土壤呼吸对模拟增温和氮素添加的响应

Arid

	内蒙古荒漠草原土壤呼吸对模拟增温和氮素添加的响应
其他题名	Response of Soil Respiration to Experimental Warming and Nitrogen Addition in Inner Mongolia Desert Steppe
	张宇 1; 红梅 2
来源期刊	草地学报
ISSN	1007-0435
出版年	2014
卷号	22 期号:6 页码:1227-1231
中文摘要	以内蒙古荒漠草原为研究对象,采用Li-8100土壤碳通量测量系统测定法,研究了控制性增温和氮素添加对荒漠草原土壤呼吸的影响。研究表明:红外辐射加热器在2年间显著提升了试验样地的土壤温度,0?30 cm土壤温度的增幅达0.4~1.0℃;但增温未能显著改变0?30 cm土壤湿度,也未能促进土壤呼吸;施氮、增温+施氮的交互作用都未显著改变试验样地的土壤呼吸值。试验期间,土壤呼吸存在明显的季节变化,其变化幅度为0. 15?3.66 mumol CO_2 ? m~(-2) ? s~(-1)。土壤呼吸与降水量和10 cm土壤含水量存在较强的相关性,相关系数分别达0. 67和0.70。内蒙古荒漠草原存在明显的水分胁迫,这使得土壤湿度取代土壤温度成为控制土壤碳通量的主要环境因子,而施加矿质氮肥对土壤呼吸的影响不显著。
英文摘要	The effects of experimental warming and nitrogen addition on soil respiration were investigated using Li-8100 soil carbon flux measuring system in the desert steppe of Inner Mongolia. The results showed that infrared radiator raised soil temperature obviously in 2010 and 2011,and the temperature of 0 ?30 cm soil layer was 0. 4?1. 0℃ higher than control. The experimental warming didn’t change the soil moisture significantly. Both nitrogen addition and warming didn’ t change soil respiration significantly. The rate of soil respiration had significant seasonal variation, ranging from 0. 15 to 3. 66mumol CO_2 ? m~(-2) ?s~(-1). There was strong correlation between soil respiration and precipitation, and between soil respiration and the moisture of 10 cm soil layer, the correlation coefficients were 0. 67 and 0. 70,respectively. There was strong water stress occurred in the desert steppe of Inner Mongolia, so soil moisture was the predominant factor of affecting soil respiration. Nitrogen addition had no obvious effect on soil respiration.
中文关键词	土壤呼吸 ; 荒漠草原 ; 模拟增温 ; 氮素添加 ; 水分胁迫
英文关键词	Soil respiration Desert steppe Experimental warming Nitrogen addition Water stress
语种	中文
国家	中国
收录类别	CSCD
WOS类目	FISHERIES
WOS研究方向	Fisheries
CSCD记录号	CSCD:5304752
来源机构	内蒙古农业大学
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/230831
作者单位	1.内蒙古农业大学生态环境学院, 呼和浩特, Inner Mongolia 010019, China; 2.内蒙古农业大学生态环境学院, 呼和浩特, 内蒙古 010019, 中国
推荐引用方式 GB/T 7714	张宇,红梅. 内蒙古荒漠草原土壤呼吸对模拟增温和氮素添加的响应[J]. 内蒙古农业大学,2014,22(6):1227-1231.
APA	张宇,&红梅.(2014).内蒙古荒漠草原土壤呼吸对模拟增温和氮素添加的响应.草地学报,22(6),1227-1231.
MLA	张宇,et al."内蒙古荒漠草原土壤呼吸对模拟增温和氮素添加的响应".草地学报 22.6(2014):1227-1231.