干旱区生态环境知识资源中心(Arid): Microbial community variation and its relationship with soil carbon accumulation during long-term oasis formation

Arid

DOI	10.1016/j.apsoil.2021.104126
	Microbial community variation and its relationship with soil carbon accumulation during long-term oasis formation
	Li, Chenhua; Li, Yan; Ma, Jie; Wang, Yugang; Wang, Zhifang; Liu, Yan
通讯作者	Li, CH (corresponding author), Chinese Acad Sci, Xinjiang Inst Ecol & Geog, 818 South Beijing Rd, Urumqi 830011, Xinjiang, Peoples R China.
来源期刊	APPLIED SOIL ECOLOGY
ISSN	0929-1393
EISSN	1873-0272
出版年	2021
卷号	168
英文摘要	The conversion of desert to farmland may change not only surface soils but also deeper soils due to massive irrigation and fertilization. However, limited information exists on the response of microorganisms throughout the soil profile to long-term crop development in desert regions. The shifts in the microbial community were investigated in relation to soil depth (0-2 m) and years of reclamation, as well as their relationship to soil organic carbon (SOC) dynamics in an irrigated arid area of northwest China. Oasis farmlands cultivated for 3, 5, 10, 20, 50, and > 100 years were compared with adjacent deserts. Total phospholipid fatty acids (PLFAs), bacterial PLFAs, and microbial biomass and activity within the whole profile increased from the beginning of farming and peaked at 20 years post-reclamation. Fungal and actinomycete PLFAs decreased in the beginning of reclamation but increased after 10 years and peaked at 20 years. Microbial community composition was dynamic within the first 10 years of reclamation and tended to become stable thereafter. During oasis formation, the carbon to nitrogen ratio of microbial biomass decreased from 9.0-10.5 to 7.2-8.0; the fungi to bacteria ratio decreased from 0.3-0.5 to 0.2-0.3, and the gram-positive to gram-negative bacteria ratio (GP:GN) increased from 0.3-0.4 to 0.4-0.6. Increases in microbial abundance and shifts in community structure were positively correlated with SOC accumulation. Redundancy analysis indicated that microbial changes were closely associated with increased soil moisture and nutrients and decreased salinity and pH. We believe the predominant factor driving microbial community shifts and soil carbon accumulation is the increased input of plant residue due to enhanced water and nitrogen availability after desert reclamation. This study emphasizes the significance of the microbial changes and the close association between increased GP:GN and SOC accumulation during oasis formation, especially in deeper soils (0.6-2.0 m).
英文关键词	Desert region Oasis formation Soil profile Microbial community Carbon accumulation
类型	Article
语种	英语
收录类别	SCI-E
WOS记录号	WOS:000701612500005
WOS关键词	ORGANIC-MATTER ; EXTRACTION METHOD ; ENZYME-ACTIVITIES ; NITROGEN ; BIOMASS ; CLASSIFICATION ; STOICHIOMETRY ; DECOMPOSITION ; DIVERSITY ; RESPONSES
WOS类目	Soil Science
WOS研究方向	Agriculture
来源机构	中国科学院新疆生态与地理研究所
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/362498
作者单位	[Li, Chenhua; Li, Yan; Ma, Jie; Wang, Yugang; Liu, Yan] Chinese Acad Sci, Xinjiang Inst Ecol & Geog, State Key Lab Desert & Oasis Ecol, Urumqi 830011, Peoples R China; [Li, Chenhua; Li, Yan; Ma, Jie; Wang, Yugang; Liu, Yan] Chinese Acad Sci, Fukang Stn Desert Ecol, Fukang 831505, Xinjiang, Peoples R China; [Li, Chenhua; Li, Yan; Ma, Jie; Wang, Yugang; Liu, Yan] Univ Chinese Acad Sci, Beijing 100049, Peoples R China; [Wang, Zhifang] Xinjiang Acad Agr Sci, Inst Microbiol, Urumqi 830091, Peoples R China
推荐引用方式 GB/T 7714	Li, Chenhua,Li, Yan,Ma, Jie,et al. Microbial community variation and its relationship with soil carbon accumulation during long-term oasis formation[J]. 中国科学院新疆生态与地理研究所,2021,168.
APA	Li, Chenhua,Li, Yan,Ma, Jie,Wang, Yugang,Wang, Zhifang,&Liu, Yan.(2021).Microbial community variation and its relationship with soil carbon accumulation during long-term oasis formation.APPLIED SOIL ECOLOGY,168.
MLA	Li, Chenhua,et al."Microbial community variation and its relationship with soil carbon accumulation during long-term oasis formation".APPLIED SOIL ECOLOGY 168(2021).