气候变化领域集成服务门户(CCPortal): Distribution and seasonal dynamics of roots in a revegetated stand of Artemisia ordosica Kracsh. in the Tengger Desert (North China)

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DOI	10.1080/15324980802182980
	Distribution and seasonal dynamics of roots in a revegetated stand of Artemisia ordosica Kracsh. in the Tengger Desert (North China)
	Zhang, Zhi-Shan; Li, Xin-Rong; Wang, Tao; Wang, Xin-Ping; Xue, Qin-Wu; Liu, Li-Chao
发表日期	2008
ISSN	1532-4982
卷号	22 期号:3
英文摘要	In revegetated desert areas, roots are critical for plant growth and community stability. A field study was conducted to investigate the distribution and dynamics of roots in a revegetated stand of Artemisia ordosica Kracsh. in the Tengger Desert during the growing seasons of 2004 and 2005. Seven trenches 1.2m wide and 1.0m deep were excavated around stems to determine the coarse root length and weight. Soil cores, spaced from the stem at an interval of 0.2, 0.4, 0.6, 0.8, and 1.0m, were designed to take fine root samples, and minirhizotrons were buried at intervals of 0.2, 0.5, and 1.0m away from the stem to measure the fine root number and length. The results showed that the root systems of A. ordosica is distributed vertically in the uppermost soil profile, especially for coarse roots, which were concentrated in the 0.2-m soil profile. The horizontal distribution of A. ordosica coarse roots was limited to a range of 0.6m and 0.4m away from the trunk for root length and weight, respectively. Fine roots were distributed uniformly in comparison with coarse roots. The total root biomass and fine root biomass were 0.42 and 0.26kgm(-2), which accounted for about 80% and 50% of the total biomass, respectively. The growth and distribution of fine roots were mainly related to soil water content. Peak values in both soil water content and fine root length were observed twice, in 2004 and 2005. The peak value of soil water content was observed 1 month prior to that of fine root length density. The fine roots were abundant 1 month later, when the volumetric soil water content reached 2.75%.
关键词	minirhizotrons psammophytic shrub soil corer soil water content trenching
学科领域	Environmental Sciences & Ecology; Agriculture
语种	英语
WOS研究方向	Environmental Sciences ; Soil Science
来源期刊	ARID LAND RESEARCH AND MANAGEMENT
来源机构	中国科学院西北生态环境资源研究院
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/111524
作者单位	Chinese Acad Sci, Cold & Arid Reg Environm & Engn Res Inst, Shapotou Desert Res & Expt Stn, Lanzhou 730000, Peoples R China
推荐引用方式 GB/T 7714	Zhang, Zhi-Shan,Li, Xin-Rong,Wang, Tao,et al. Distribution and seasonal dynamics of roots in a revegetated stand of Artemisia ordosica Kracsh. in the Tengger Desert (North China)[J]. 中国科学院西北生态环境资源研究院,2008,22(3).
APA	Zhang, Zhi-Shan,Li, Xin-Rong,Wang, Tao,Wang, Xin-Ping,Xue, Qin-Wu,&Liu, Li-Chao.(2008).Distribution and seasonal dynamics of roots in a revegetated stand of Artemisia ordosica Kracsh. in the Tengger Desert (North China).ARID LAND RESEARCH AND MANAGEMENT,22(3).
MLA	Zhang, Zhi-Shan,et al."Distribution and seasonal dynamics of roots in a revegetated stand of Artemisia ordosica Kracsh. in the Tengger Desert (North China)".ARID LAND RESEARCH AND MANAGEMENT 22.3(2008).