干旱区生态环境知识资源中心(Arid): Effects of water and nitrogen on growth and relative competitive ability of introduced versus native C-4 grass species in the semi-arid Loess Plateau of China

Arid

DOI	10.1007/s40333-021-0010-8
	Effects of water and nitrogen on growth and relative competitive ability of introduced versus native C-4 grass species in the semi-arid Loess Plateau of China
	Ding, Wenli; Xu, Weizhou; Gao, Zhijuan; Xu, Bingcheng
通讯作者	Xu, BC (corresponding author), Northwest A&F Univ, State Key Lab Soil Eros & Dryland Farming Loess P, Yangling 712100, Shaanxi, Peoples R China. ; Xu, BC (corresponding author), Chinese Acad Sci & Minist Water Resources, Inst Soil & Water Conservat, Yangling 712100, Shaanxi, Peoples R China.
来源期刊	JOURNAL OF ARID LAND
ISSN	1674-6767
EISSN	2194-7783
出版年	2021
卷号	13 期号:7 页码:730-743
英文摘要	Switchgrass is an introduced C-4 grass in the semi-arid Loess Plateau of China, but there is a lack of information to assess its ecological invasive risk. In this study, Old World bluestems (native C-4 grass) and switchgrass were sowed at five mixture ratios (8:0, 6:2, 4:4, 2:6 and 0:8) under two soil water levels (80% field capacity (FC) and 40% FC) and two nitrogen (N) treatments (0 and 100 mg N/kg dry soil, termed N-0-unfertilized and N-1-fertilized treatments, respectively) in a pot experiment in 2012. Biomass, root morphological traits and relative competitive abilities of these two species were analyzed. Results showed that biomass of both species was significantly greater under 80% FC or N fertilization, and switchgrass had a relatively larger root:shoot ratio (RSR). Total root length (TRL) and root surface area (RSA) of switchgrass were significantly higher under 80% FC irrespective of N treatment, while those of Old World bluestems were only significantly higher under N fertilization. N had no significant effect on TRL and RSA of switchgrass, while RSA of Old World bluestems significantly increased under 80% FC and N fertilization. Under 40% FC and N-0-unfertilized treatment, the aggressivity of Old World bluestems was larger than zero at 2:6 and 4:4 mixture ratios of two species, whereas it was close to zero at 6:2 mixture ratio. Root competitive ability of switchgrass significantly increased under 80% FC or N fertilization. The aggressivity of Old World bluestems was negative at 6:2 mixture ratio under 80% FC and N fertilization, while it was positive at 2:6 mixture ratio. Switchgrass may become more aggressive when N deposition or rainfall increases, while a proper mixture ratio with appropriate water and N management could help with grassland management in the semi-arid Loess Plateau.
英文关键词	aggressivity nitrogen deposition relative competitive ability root trait water stress
类型	Article
语种	英语
收录类别	SCI-E
WOS记录号	WOS:000685300400006
WOS关键词	PLANT INVASION ; SWITCHGRASS ; DEPOSITION ; DIVERSITY ; BIOENERGY ; RESPONSES ; TRAITS ; STRESS ; FERTILIZATION ; PRECIPITATION
WOS类目	Environmental Sciences
WOS研究方向	Environmental Sciences & Ecology
来源机构	西北农林科技大学
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/367962
作者单位	[Ding, Wenli; Gao, Zhijuan; Xu, Bingcheng] Northwest A&F Univ, State Key Lab Soil Eros & Dryland Farming Loess P, Yangling 712100, Shaanxi, Peoples R China; [Xu, Weizhou] Yulin Univ, Coll Life Sci, Yulin 719000, Peoples R China; [Xu, Bingcheng] Chinese Acad Sci & Minist Water Resources, Inst Soil & Water Conservat, Yangling 712100, Shaanxi, Peoples R China
推荐引用方式 GB/T 7714	Ding, Wenli,Xu, Weizhou,Gao, Zhijuan,et al. Effects of water and nitrogen on growth and relative competitive ability of introduced versus native C-4 grass species in the semi-arid Loess Plateau of China[J]. 西北农林科技大学,2021,13(7):730-743.
APA	Ding, Wenli,Xu, Weizhou,Gao, Zhijuan,&Xu, Bingcheng.(2021).Effects of water and nitrogen on growth and relative competitive ability of introduced versus native C-4 grass species in the semi-arid Loess Plateau of China.JOURNAL OF ARID LAND,13(7),730-743.
MLA	Ding, Wenli,et al."Effects of water and nitrogen on growth and relative competitive ability of introduced versus native C-4 grass species in the semi-arid Loess Plateau of China".JOURNAL OF ARID LAND 13.7(2021):730-743.