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 C4 grass species in the semi-arid Loess Plateau of China

Arid

	Effects of water and nitrogen on growth and relative competitive ability of introduced versus native C4 grass species in the semi-arid Loess Plateau of China
	Ding Wenli; Xu Weizhou; Gao Zhijuan; Xu Bingcheng
来源期刊	干旱区科学
ISSN	1674-6767
出版年	2021
卷号	13 期号:7 页码:1674-6767
英文摘要	Switchgrass is an introduced C4 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 C4 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 N0-unfertilized and Ni-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 foot: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 N0-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
国家	中国
收录类别	CSCD
WOS类目	History
CSCD记录号	CSCD:7025983
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/365058
作者单位	Ding Wenli, Northwest A&F University, State Key Laboratory of Soil Erosion and Dryland Farming on the Loess Plateau, Yangling, Shanxi 712100, China.; Gao Zhijuan, Northwest A&F University, State Key Laboratory of Soil Erosion and Dryland Farming on the Loess Plateau, Yangling, Shanxi 712100, China.; Xu Weizhou, College of Life Science, Yulin University, Yulin, Guangxi 719000, China.; Xu Bingcheng, Northwest A&F University;;Institute of Soil and Water Conservation, Chinese Academy of Sciences and Ministry of Water Resources, State Key Laboratory of Soil Erosion and Dryland Farming on the Loess Plateau;;, Yangling;;Yangling, ;; 712100;;712100.
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 C4 grass species in the semi-arid Loess Plateau of China[J],2021,13(7):1674-6767.
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 C4 grass species in the semi-arid Loess Plateau of China.干旱区科学,13(7),1674-6767.
MLA	Ding Wenli,et al."Effects of water and nitrogen on growth and relative competitive ability of introduced versus native C4 grass species in the semi-arid Loess Plateau of China".干旱区科学 13.7(2021):1674-6767.