Effects of Multi-nutrient Additions on GHG Fluxes in a Temperate Grassland of Northern China

doi:10.1007/s10021-014-9750-z

	Effects of Multi-nutrient Additions on GHG Fluxes in a Temperate Grassland of Northern China
	Zhang, Lihua ; Huo, Yawen ; Guo, Dufa 1; Wang, Qibing ; Bao, Yin 2; Li, Linghao
	2014
发表期刊	ECOSYSTEMS
ISSN	1432-9840
卷号	17 期号:4 页码:657-672
摘要	Human activities have substantially enhanced the availability of important nutrient elements such as nitrogen (N), phosphorus (P), and potassium (K) in ecosystems worldwide. However, how the concurrent increase in all of these nutrients will affect greenhouse gas (that is, CO2, N2O, CH4) levels remains unknown. In a temperate steppe of northern China, a 2-year field experiment was conducted to examine the effects of multi-nutrient additions on GHG fluxes from 2009 to 2010. Four levels of annual nutrient loads were mimicked: 0 g NPK (control), 15.5 g P m(-2) and 19.5 g K m(-2) as KH2PO4 (PK), 10 g N m(-2) as NH4NO3 plus PK (10N + PK), and 20 g N m(-2) plus PK (20N + PK) per year. The results show that multi-nutrient additions led to significant increases in net primary production (NPP) and soil temperature (ST), a significant decrease in soil moisture (SM) in 2010, and no significant changes in other soil parameters. Seasonal patterns differed greatly for different GHG fluxes in response to different nutrient treatments, largely as a result of differences in influential factors. The 10N + PK treatment significantly increased CO2 uptake, whereas the 20N + PK treatment significantly decreased CO2 uptake. The application of P and K without additional N significantly enhanced CH4 uptake, whereas the two N + PK treatments significantly enhanced N2O emissions. Significant positive, linear relationships were found between cumulative CO2 uptake and soil total nitrogen (TN), microbial biomass carbon, and microbial biomass nitrogen, whereas significant negative, linear relationships were found with NPP, SM, and the C/N ratio. Significant positive, linear relationships were found between cumulative N2O emission and ST, TN, NPP, and total organic carbon, whereas no relationships were found between cumulative CH4 uptake and any soil parameters. CO2 flux was related to N2O flux temporally, to a certain extent, for all the treatments. In the control, N2O flux showed a negative, linear relationship with CH4 flux, whereas no regular relationships were detected between CO2 and CH4 fluxes in any treatment. Our findings imply that increasing nutrient deposition will change the magnitude, patterns, and relationships among GHG uptakes and emissions in the future.
关键词	Nitrogen Phosphorus Potassium Net primary production Soil temperature Soil moisture Soil microbial carbon and nitrogen GHGs
学科领域	Ecology
DOI	10.1007/s10021-014-9750-z
收录类别	SCI
语种	英语
WOS关键词	METHANE EMISSION ; CARBON SEQUESTRATION ; N2O EMISSIONS ; NITROGEN DEPOSITION ; MICROBIAL BIOMASS ; LEYMUS-CHINENSIS ; OXIDE EMISSIONS ; CLIMATE-CHANGE ; FRESH-WATER ; SOIL
WOS研究方向	Environmental Sciences & Ecology
WOS记录号	WOS:000336397600008
出版者	SPRINGER
文献子类	Article
出版地	NEW YORK
EISSN	1435-0629
资助机构	National Natural Science Foundation of China [40801037, 31130008, 41371111] ; National Basic Research Program of China [2010CB951300, 2010CB833502] ; Strategic Priority Research Program of the Chinese Academy of Sciences [XDA05050406-06]
作者邮箱	qwang@ibcas.ac.cn ; llinghao@ibcas.ac.cn
引用统计	被引频次：22[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://ir.ibcas.ac.cn/handle/2S10CLM1/27263
专题	植被与环境变化国家重点实验室
作者单位	1.Chinese Acad Sci, Inst Bot, State Key Lab Vegetat & Environm Change, Beijing 100093, Peoples R China 2.Shandong Normal Univ, Jinan 250014, Peoples R China 3.Inner Mongolian Univ, Hohhot 010020, Peoples R China
推荐引用方式 GB/T 7714	Zhang, Lihua,Huo, Yawen,Guo, Dufa,et al. Effects of Multi-nutrient Additions on GHG Fluxes in a Temperate Grassland of Northern China[J]. ECOSYSTEMS,2014,17(4):657-672.
APA	Zhang, Lihua,Huo, Yawen,Guo, Dufa,Wang, Qibing,Bao, Yin,&Li, Linghao.(2014).Effects of Multi-nutrient Additions on GHG Fluxes in a Temperate Grassland of Northern China.ECOSYSTEMS,17(4),657-672.
MLA	Zhang, Lihua,et al."Effects of Multi-nutrient Additions on GHG Fluxes in a Temperate Grassland of Northern China".ECOSYSTEMS 17.4(2014):657-672.

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