干旱区生态环境知识资源中心(Arid): Seedling germination technique of Carex brunnescens and its application in restoration of Maqu degraded alpine grasslands in northwestern China

Arid

DOI	10.3724/SP.J.1226.2020.00295
	Seedling germination technique of Carex brunnescens and its application in restoration of Maqu degraded alpine grasslands in northwestern China
	Kang, JianJun; Zhao, WenZhi; Zhang, CaiXia; Liu, Chan; Wang, ZhiWei; Wang, HaiJun
通讯作者	Zhao, WZ
来源期刊	SCIENCES IN COLD AND ARID REGIONS
ISSN	1674-3822
出版年	2020
卷号	12 期号:5 页码:295-305
英文摘要	Carex brunnescens (Pers.) Poir. is considered to be the only clonal herb found to date that can develop and form fixed dunes in Maqu alpine degraded grasslands of northwestern China. However, due to strong dormant characteristics of C. brunnescens seeds, the sand-fixing effect of the plant is severely limited. This study explores a technique that can rapidly promote the seed germination of C. brunnescens, and also investigates the adaptation and sand-fixing effect by cultivating C. brunnescens seedlings to establish living sand barriers in the sand ridges of moving sand dunes. Results show that the seed germination rate obtained a maximum of 63.7% or 65.1% when seeds were treated with 150 mg/L gibberellic acid (GA(3)) for 24 h followed by soaking in sulfuric acid (98% H2SO4) for 2.5 min or sodium hydroxide (10% NaOH) for 3.5 h, and then germinated (25 degrees C in daytime and 5 degrees C at nighttime) in darkness for 10 d. After breaking seed dormancy of C. brunnescens, the living sand barrier of C. brunnescens (plant spacing 15-20 cm; sand barrier spacing 10-20 m) was established in the perpendicular direction to the main wind in the middle and lower parts of the sand ridges on both sides of the moving sand dunes. When the sand ridges were leveled by wind erosion, the living sand barrier (plant spacing 15-20 cm; sand barrier spacing 0.5 -1.0 m) of C. brunnescens was reestablished on the wind-eroded flat ground. Finally, a stable sand-fixing surface can be formed after connecting the living sand barriers on both sides, thus achieving a good sand-fixing effect. These findings suggest that rapid seed germination technology combined with the sand-fixing method of C. brunnescens can shorten the seed germination period and make the seedling establishment become much easier which may be an effective strategy to restore and reconstruct Maqu degraded grasslands.
英文关键词	Carex brurznescens living sand barrier Maqu degraded grasslands moving sand ridge sand-fixing method seed germination technique
类型	Article
语种	英语
收录类别	ESCI
WOS记录号	WOS:000590873100004
WOS关键词	WIND EROSION ; SAND-BURIAL ; DORMANCY ; GROWTH ; DESERTIFICATION ; REPRODUCTION ; ENVIRONMENT ; WATER
WOS类目	Geography, Physical
WOS研究方向	Physical Geography
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/334745
作者单位	[Kang, JianJun; Zhao, WenZhi; Zhang, CaiXia; Liu, Chan] Chinese Acad Sci, Northwest Inst Ecoenvironm & Resources, Key Lab Inland River Basin Ecohydrol, Linze Inland River Basin Res Stn, Lanzhou 730000, Gansu, Peoples R China; [Wang, ZhiWei] Guizhou Acad Agr Sci, Guizhou Inst Prataculture, Guiyang 550006, Guizhou, Peoples R China; [Wang, HaiJun] Zhangye Acad Agr Sci, Zhangye 734000, Gansu, Peoples R China
推荐引用方式 GB/T 7714	Kang, JianJun,Zhao, WenZhi,Zhang, CaiXia,et al. Seedling germination technique of Carex brunnescens and its application in restoration of Maqu degraded alpine grasslands in northwestern China[J],2020,12(5):295-305.
APA	Kang, JianJun,Zhao, WenZhi,Zhang, CaiXia,Liu, Chan,Wang, ZhiWei,&Wang, HaiJun.(2020).Seedling germination technique of Carex brunnescens and its application in restoration of Maqu degraded alpine grasslands in northwestern China.SCIENCES IN COLD AND ARID REGIONS,12(5),295-305.
MLA	Kang, JianJun,et al."Seedling germination technique of Carex brunnescens and its application in restoration of Maqu degraded alpine grasslands in northwestern China".SCIENCES IN COLD AND ARID REGIONS 12.5(2020):295-305.