干旱区生态环境知识资源中心(Arid): Optimal root system strategies for desert phreatophytic seedlings in the search for groundwater

Arid

	Optimal root system strategies for desert phreatophytic seedlings in the search for groundwater
	Li Changjun; Zeng Fanjiang; Zhang Bo; Guo Zi chun; Gao Huan huan; Tiyip Tashpolat; Liu Bo
来源期刊	Journal of Arid Land
ISSN	1674-6767
出版年	2015
卷号	7 期号:4 页码:462-474
英文摘要	Desert phreatophytes are greatly dependent on groundwater, but how their root systems adapt to different groundwater depths is poorly understood. In the present study, shoot and root growths of Alhagi sparsifolia Shap. seedlings were studied across a gradient of groundwater depths. Leaves, stems and roots of different orders were measured after 120 days of different groundwater treatments. Results indicated that the depth of soil wetting front and the vertical distribution of soil water contents were highly controlled by groundwater depths. The shoot growth and biomass of A. sparsifolia decreased, but the root growth and rooting depth increased under deeper groundwater conditions. The higher ratios of root biomass, root/shoot and root length/leaf area under deeper groundwater conditions implied that seedlings of A sparsifolia economized carbon cost on their shoot growths. The roots of A. sparsifolia distributed evenly around the soil wetting fronts under deeper groundwater conditions. Root diameters and root lengths of all orders were correlated with soil water availabilities both within and among treatments. Seedlings of A sparsifolia produced finer first- and second-order roots but larger third- and fourth-order roots in dry soils. The results demonstrated that the root systems of desert phreatophytes can be optimized to acquire groundwater resources and maximize seedling growth by balancing the costs of carbon gain.
英文关键词	desert phreatophytes root system strategy groundwater depth soil water biomass partition
类型	Article
语种	英语
收录类别	CSCD
WOS研究方向	History
CSCD记录号	CSCD:5427726
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/335491
作者单位	Li Changjun, Xinjiang Institute of Ecology and Geography, Chinese Academy of Sciences, State Key Laboratory of Desert and Oasis Ecology;Key Laboratory of Biogeography and Bioresource in Arid Land, Chinese Academy of Sciences, Urumqi, Xinjiang 830011, China.; Liu Bo, Xinjiang Institute of Ecology and Geography, Chinese Academy of Sciences, State Key Laboratory of Desert and Oasis Ecology;Key Laboratory of Biogeography and Bioresource in Arid Land, Chinese Academy of Sciences, Urumqi, Xinjiang 830011, China.; Zeng Fanjiang, Xinjiang Institute of Ecology and Geography, Chinese Academy of Sciences, State Key Laboratory of Desert and Oasis Ecology, Urumqi, Xinjiang 830011, China.; Guo Zi chun, Xinjiang Institute of Ecology and Geography, Chinese Academy of Sciences, State Key Laboratory of Desert and Oasis Ecology, Urumqi, Xinjiang 830011, China.; Tiyip Tashpolat, Xinjiang Institute of Ecology and Geography, Chinese Academy of Sciences, State Key Laboratory of Desert and Oasis Ecology, Urumqi, Xinjiang 830011,...
推荐引用方式 GB/T 7714	Li Changjun,Zeng Fanjiang,Zhang Bo,et al. Optimal root system strategies for desert phreatophytic seedlings in the search for groundwater[J],2015,7(4):462-474.
APA	Li Changjun.,Zeng Fanjiang.,Zhang Bo.,Guo Zi chun.,Gao Huan huan.,...&Liu Bo.(2015).Optimal root system strategies for desert phreatophytic seedlings in the search for groundwater.Journal of Arid Land,7(4),462-474.
MLA	Li Changjun,et al."Optimal root system strategies for desert phreatophytic seedlings in the search for groundwater".Journal of Arid Land 7.4(2015):462-474.