干旱区生态环境知识资源中心(Arid): Long-term irrigation reduces soil carbon sequestration by affecting soil microbial communities in agricultural ecosystems of northern China

Arid

DOI	10.1111/ejss.13143
	Long-term irrigation reduces soil carbon sequestration by affecting soil microbial communities in agricultural ecosystems of northern China
	Qi, Yongqing; Li, Jian; Deng, Shaojun; Wang, Jun; Zhang, Yanju; Pei, Hongwei; Shen, Yanjun; Hui, Dafeng; Lambers, Hans; Sardans, Jordi; Penuelas, Josep; Liu, Zhanfeng
通讯作者	Liu, ZF (corresponding author), Chinese Acad Sci, Key Lab Vegetat Restorat & Management Degraded Ec, South China Bot Garden, Guangzhou 510650, Peoples R China.
来源期刊	EUROPEAN JOURNAL OF SOIL SCIENCE
ISSN	1351-0754
EISSN	1365-2389
出版年	2021-07
英文摘要	Irrigation has become one of the main approaches to improve agricultural production in an arid area. The variation of soil moisture after irrigation has the potential to affect soil microbial community composition and soil organic carbon (SOC) storage, and thus, the imbalances in the terrestrial ecosystem carbon cycle. However, the impact of long-term irrigation on the relationships between soil microbial community and SOC sequestration in semiarid agroecosystems is still poorly understood. We took advantage of a 7-year irrigation experiment in a winter wheat-maize rotation system in northern China, whereby the non-irrigation was subject to rain-fed conditions. We aimed to investigate the effects of long-term irrigation on soil microbial communities and their linkages with soil carbon sequestration. Seven years of irrigation significantly increased soil moisture content by 39% but decreased SOC concentration of topsoil (0-20 cm) by 4.2% on average across all sampling times. The responses of soil microbial communities to irrigation were highly taxa dependent. Irrigation significantly decreased fungal biomass, fungal-to-bacterial ratio and Gram-positive-to-Gram-negative bacterial ratio, and did not affect the bacterial community biomass. The decreased SOC concentration under the long-term irrigation was mainly caused by the changes in the ratio of fungi-to-bacteria. Our findings highlight the important role of soil fungal-to-bacterial ratio in mediating the response of SOC dynamics to a future drier climate in semiarid agricultural ecosystems. Highlights Irrigation influences the soil microbial community and carbon stock in semiarid agroecosystems. Highlights the role of fungi:bacteria ratio in mediating the response of SOC dynamics to irrigation Long-term irrigation decreased soil carbon content by changing the microbial community. Reduced SOC storage after irrigation was due to the decreased ratio between fungi and bacteria.
英文关键词	fungi Gram-negative bacteria Gram-positive bacteria semiarid agricultural systems soil carbon soil microbial community composition soil moisture
类型	Article ; Early Access
语种	英语
收录类别	SCI-E
WOS记录号	WOS:000678201800001
WOS关键词	WINTER-WHEAT YIELD ; CLIMATE-CHANGE ; FUNGAL COMMUNITIES ; DROUGHT ; BACTERIAL ; RESPONSES ; RESPIRATION ; STRESS ; ALTERS ; PRECIPITATION
WOS类目	Soil Science
WOS研究方向	Agriculture
来源机构	中国农业大学 ; University of Western Australia
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/363217
作者单位	[Qi, Yongqing; Pei, Hongwei; Shen, Yanjun] Chinese Acad Sci, Ctr Agr Resources Res, Key Lab Agr Water Resources, Inst Genet & Dev Biol, Shijiazhuang, Hebei, Peoples R China; [Li, Jian; Deng, Shaojun; Wang, Jun; Zhang, Yanju; Liu, Zhanfeng] Chinese Acad Sci, Key Lab Vegetat Restorat & Management Degraded Ec, Guangzhou, Peoples R China; [Li, Jian; Deng, Shaojun; Wang, Jun; Zhang, Yanju; Liu, Zhanfeng] Chinese Acad Sci, CAS Engn Lab Vegetat Ecosyst Restorat Isl & Coast, South China Bot Garden, Guangzhou, Peoples R China; [Li, Jian] Chinese Acad Sci, Key Lab Urban Environm & Hlth, Inst Urban Environm, Xiamen, Peoples R China; [Hui, Dafeng] Tennessee State Univ, Dept Biol Sci, Nashville, TN 37203 USA; [Lambers, Hans] Univ Western Australia, Sch Biol Sci, Perth, WA, Australia; [Lambers, Hans] China Agr Univ, Minist Educ, Coll Resources & Environm Sci, Dept Plant Nutr, Beijing, Peoples R China; [Lambers, Hans] China Agr Univ, Minist Educ, Natl Acad Agr Green Dev, Beijing, Peoples R China; [Lambers, Hans] China A...
推荐引用方式 GB/T 7714	Qi, Yongqing,Li, Jian,Deng, Shaojun,et al. Long-term irrigation reduces soil carbon sequestration by affecting soil microbial communities in agricultural ecosystems of northern China[J]. 中国农业大学, University of Western Australia,2021.
APA	Qi, Yongqing.,Li, Jian.,Deng, Shaojun.,Wang, Jun.,Zhang, Yanju.,...&Liu, Zhanfeng.(2021).Long-term irrigation reduces soil carbon sequestration by affecting soil microbial communities in agricultural ecosystems of northern China.EUROPEAN JOURNAL OF SOIL SCIENCE.
MLA	Qi, Yongqing,et al."Long-term irrigation reduces soil carbon sequestration by affecting soil microbial communities in agricultural ecosystems of northern China".EUROPEAN JOURNAL OF SOIL SCIENCE (2021).