干旱区生态环境知识资源中心(Arid): 短花针茅荒漠草原甲烷通量对增温和施氮的响应

Arid

	短花针茅荒漠草原甲烷通量对增温和施氮的响应
其他题名	Responses of Methane Fluxes on Warming and Nitrogen Addition in Stipa breviflora Desert Steppe
	潘占磊; 王忠武; 韩国栋; 武倩; 刘芳; 王瑞珍
来源期刊	生态环境学报
ISSN	1674-5906
出版年	2016
卷号	25 期号:2 页码:209-216
中文摘要	全球变化是多个因子发生变化的过程,土壤CH_4通量对全球变化的响应是多个因子对土壤CH_4通量影响的综合体现。近年来,内蒙古地区大气温度不断升高,大气氮沉降量不断增加,因此,研究增温和氮沉降对草地生态系统土壤CH_4通量的影响对全球碳收支平衡具有重要意义。为了研究增温、氮沉降及其交互作用对短花针茅(Stipa breviflora)荒漠草原土壤CH_4通量的影响,2013─2014年生长季(5─10月)采用静态箱法,对长期(2006年以来)增温和施氮条件下土壤CH_4通量进行测定,同时连续监测了10 cm土壤温度和土壤湿度。结果表明:在增温区,土壤温度和土壤湿度均会显著增加,而在施氮区,土壤湿度则会显著降低(P<0.0001)。生长季短花针茅荒漠草原土壤CH_4的平均吸收量为40.2~50.5 mug?m~(-2)?h~(-1),年份会对土壤CH_4的吸收产生显著影响(P=0.0097),但增温、施氮及其交互作用对土壤CH_4的吸收均无显著影响(P>0.05)。在年际间,土壤CH_4的吸收与土壤温度间的关系不同,2013年二者呈显著的线性相关(P=0.0291),而2014年二者呈显著的二次多项式关系(P=0.0396);土壤CH_4的吸收与土壤湿度仅在2013年呈显著的二次多项式关系(P=0.0124),2014年二者之间没有明显关系。土壤温度和土壤湿度或月降水量共同对土壤CH_4吸收变化的解释能力(R~2:0.37~0.76)高于单因子(R~2:0.20~0.34)。该研究表明在生长季短花针茅荒漠草原大气CH_4以汇为主;大气增温和氮沉降对短花针茅荒漠草原土壤CH_4的吸收无影响。
英文摘要	Climate change is a process that is driven by multiple factor changes. The response of soil CH_4 flux on climate change is an integrated effect of multiple factors. Atmospheric temperature and nitrogen deposition are constantly increasing in Inner Mongolia at recent years, therefore, it is necessary to study the effects of global warming and nitrogen deposition on soil CH_4 flux in grassland ecosystem. To study the effects of warming, nitrogen deposition and their interaction on soil CH_4 flux in Stipa breviflora desert steppe, a static chamber method was used to measure soil CH_4 flux during two growing season (from May to October) in 2013 and 2014 under the long-term (since 2006) warming and nitrogen addition. Meanwhile, soil temperature and soil moisture were continuously measured at the depth of 10 cm. The results showed that soil temperature and soil moisture were significantly increased in the warming plots, but soil moisture in the nitrogen addition plots was significantly decreased (P < 0.0001). Mean soil CH_4 uptake during the growing season was 40.2~50.5 mug?m~(-2)?h~(-1) in Stipa breviflora desert steppe. The soil CH_4 uptake was significantly influenced by year (P =0.0097). The warming, nitrogen addition and their interaction did not significantly influence the soil CH_4 uptake (P >0.05). There are different relationships between soil CH_4 uptake and soil temperature in the different years. In 2013, a significant linear relationship was found between soil CH_4 uptake and soil temperature (P=0.0291), but there was a significant quadratic polynomial relationship in 2014 (P=0.0396). The influence of soil moisture on soil CH_4 uptake was described by a quadratic polynomial relationship in 2013 (P=0.0124), but there was no relationship between them in 2014. The integrated influence of soil temperature and soil moisture or monthly precipitation on soil CH_4 uptake (R~2: 0.37~0.76) was higher than any single factor (R~2: 0.20~0.34). The results indicated that Stipa breviflora desert steppe was an atmospheric CH_4 sink during the growing season. Atmospheric warming and nitrogen deposition had no influence on soil CH_4 uptake in Stipa breviflora desert steppe.
中文关键词	短花针茅 ; 荒漠草原 ; 增温 ; 氮沉降
英文关键词	CH_4 Stipa breviflora desert steppe warming nitrogen deposition CH_4
语种	中文
国家	中国
收录类别	CSCD
WOS类目	ENVIRONMENTAL SCIENCES
WOS研究方向	Environmental Sciences & Ecology
CSCD记录号	CSCD:5676716
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/2XILL650/234712
作者单位	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	潘占磊,王忠武,韩国栋,等. 短花针茅荒漠草原甲烷通量对增温和施氮的响应[J]. 内蒙古农业大学,2016,25(2):209-216.
APA	潘占磊,王忠武,韩国栋,武倩,刘芳,&王瑞珍.(2016).短花针茅荒漠草原甲烷通量对增温和施氮的响应.生态环境学报,25(2),209-216.
MLA	潘占磊,et al."短花针茅荒漠草原甲烷通量对增温和施氮的响应".生态环境学报 25.2(2016):209-216.