干旱区生态环境知识资源中心(Arid): Response of root traits of Reaumuria soongorica and Salsola passerina to facilitation

Arid

	Response of root traits of Reaumuria soongorica and Salsola passerina to facilitation
	Zhang Haina; Su Peixi; Li Shanjia; Zhou Zijuan; Xie Tingting
来源期刊	Journal of Arid Land
ISSN	1674-6767
出版年	2014
卷号	6 期号:5 页码:628-636
英文摘要	C_3 plant Reaumuria soongorica and C_4 plant Salsola passerina are super xerophytes and coexist in a mixed community in either isolated or associated growth, and interspecific facilitation occurs in associated growth. In the present study, the root traits including root distribution, root length(RL), root surface area(RSA), root weight(RW) and specific root length(SRL) of both species in two growth forms were investigated to clarify their response to facilitation in associated growth. Six isolated plants of each species, as well as six associated plants similar in size and development were selected during the plant growing season, and their roots were excavated at 0-10, 10-20, 20-30, 30-40 and 40-50 cm soil depths at the end of the growing season. All the roots of each plant were separated into the two categories of fine roots(<2 mm diameter) and coarse roots(≥2 mm diameter). Root traits such as RL and RSA in the fine and coarse roots were obtained by the root analyzing system WinRHIZO. Most of the coarse roots in R. soongorica and S. passerina were distributed in the top 10 cm of the soil in both growth forms, whereas the fine roots of the two plant species were found mainly in the 10-20 and 20-30 cm soil depths in isolated growth, respectively. However, the fine roots of both species were mostly overlapped in 10-20 cm soil depth in associated growth. The root/canopy ratios of both species reduced, whereas the ratios of their fine roots to coarse roots in RL increased, and both species had an increased SRL in the fine roots in associated growth. In addition, there was the increase in RL of fine roots and content of root N for S. passerina in associated growth. Taken together, the root growth of S. passerina was facilitated for water and nutrient exploration under the interaction of the overlapped roots in both species in associated growth, and higher SRL allowed both species to more effectively adapt to the infertile soil in the desert ecosystem.
英文关键词	C_3 plant C_4 plant facilitation relationship root traits specific root length
类型	Article
语种	英语
开放获取类型	Bronze
收录类别	CSCD
WOS研究方向	Agriculture
CSCD记录号	CSCD:5203533
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/335396
作者单位	Zhang Haina, Linze Inland River Basin Research Station, Cold and Arid Regions Environmental and Engineering Research Institute, Chinese Academy of Sciences, Key Laboratory of Land Surface Process and Climate Change in Cold and Arid Regions, Chinese Academy of Sciences, Lanzhou, Gansu 730000, China.; Su Peixi, Linze Inland River Basin Research Station, Cold and Arid Regions Environmental and Engineering Research Institute, Chinese Academy of Sciences, Key Laboratory of Land Surface Process and Climate Change in Cold and Arid Regions, Chinese Academy of Sciences, Lanzhou, Gansu 730000, China.; Li Shanjia, Linze Inland River Basin Research Station, Cold and Arid Regions Environmental and Engineering Research Institute, Chinese Academy of Sciences, Key Laboratory of Land Surface Process and Climate Change in Cold and Arid Regions, Chinese Academy of Sciences, Lanzhou, Gansu 730000, China.; Zhou Zijuan, Linze Inland River Basin Research Station, Cold and Arid Regions Environmental and Engineering Research Inst...
推荐引用方式 GB/T 7714	Zhang Haina,Su Peixi,Li Shanjia,et al. Response of root traits of Reaumuria soongorica and Salsola passerina to facilitation[J],2014,6(5):628-636.
APA	Zhang Haina,Su Peixi,Li Shanjia,Zhou Zijuan,&Xie Tingting.(2014).Response of root traits of Reaumuria soongorica and Salsola passerina to facilitation.Journal of Arid Land,6(5),628-636.
MLA	Zhang Haina,et al."Response of root traits of Reaumuria soongorica and Salsola passerina to facilitation".Journal of Arid Land 6.5(2014):628-636.