XTBG OpenIR  > 恢复生态学组
Vertical patterns of soil water acquisition by non-native rubber trees (Hevea brasiliensis) in Xishuangbanna, southwest China
Wenjie Liu; jintao Li; Hongjian Liu; Pingyuan Wang; Qinpu Luo; Wenyao Liu; Hongmei Li
2014
Source PublicationEcohydrology
Volume7Issue:4Pages:1234-1244
AbstractThe rubber tree (Hevea brasiliensis) has been extensively cultivated in Xishuangbanna, southwest (SW) China. It shows strong synchronicity for flushing and shedding, displaying a very different phenology to the native vegetation. However, little is known about the water-use patterns of the plant in this area. We assessed seasonal water-use strategies of rubber trees over the course of a rainy/dry season cycle. Stable isotope compositions of water in xylem, soil, rain and groundwater were sampled on seasonally distinct dates, and soil water content, root distribution and leaf water potential on sunny days were measured in order to determine the proportion of water derived from different soil layers. Midday leaf water potential of rubber trees was relatively stable throughout the year and did not drop significantly during the late dry season, displaying isohydric behaviour. Soil and stem water isotope signatures along with rooting distributional patterns revealed that rubber trees extracted their water mostly from the top 30 cm and less from below 70 cm of the soil profile during the late rainy season when soil water was plentiful. During the late dry season, as the moisture in the middle soil layers (30–70 cm) was gradually depleted, the depth of water uptake shifted to deeper soil levels. Model calculations showed that the proportion of water uptake from the shallow soil layer (<30 cm) increased markedly after the most recent rainfall in the late dry season and the early rainy season (varying between 65% and 71%), indicating significant plasticity in sources of water uptake in this dimorphic-rooted species. This ability to take up a large proportion of shallow soil water after rainfall is likely the key feature enabling rubber trees to thrive through the period of greatest water demand. Our results suggest that rubber trees are able to adjust the allocation of resources and thus acclimate to the spatiotemporal changes to water conditions in the soil profile.
Document Type期刊论文
Identifierhttp://ir.xtbg.org.cn/handle/353005/10079
Collection恢复生态学组
Recommended Citation
GB/T 7714
Wenjie Liu,jintao Li,Hongjian Liu,et al. Vertical patterns of soil water acquisition by non-native rubber trees (Hevea brasiliensis) in Xishuangbanna, southwest China[J]. Ecohydrology,2014,7(4):1234-1244.
APA Wenjie Liu.,jintao Li.,Hongjian Liu.,Pingyuan Wang.,Qinpu Luo.,...&Hongmei Li.(2014).Vertical patterns of soil water acquisition by non-native rubber trees (Hevea brasiliensis) in Xishuangbanna, southwest China.Ecohydrology,7(4),1234-1244.
MLA Wenjie Liu,et al."Vertical patterns of soil water acquisition by non-native rubber trees (Hevea brasiliensis) in Xishuangbanna, southwest China".Ecohydrology 7.4(2014):1234-1244.
Files in This Item:
File Name/Size DocType Version Access License
Vertical patterns of(698KB) 开放获取CC BY-NC-SAView Application Full Text
Related Services
Recommend this item
Bookmark
Usage statistics
Export to Endnote
Google Scholar
Similar articles in Google Scholar
[Wenjie Liu]'s Articles
[jintao Li]'s Articles
[Hongjian Liu]'s Articles
Baidu academic
Similar articles in Baidu academic
[Wenjie Liu]'s Articles
[jintao Li]'s Articles
[Hongjian Liu]'s Articles
Bing Scholar
Similar articles in Bing Scholar
[Wenjie Liu]'s Articles
[jintao Li]'s Articles
[Hongjian Liu]'s Articles
Terms of Use
No data!
Social Bookmark/Share
File name: Vertical patterns of soil water acquisition by non-native rubber trees (Hevea brasiliensis) in Xishuangbanna, southwest China.pdf
Format: Adobe PDF
This file does not support browsing at this time
All comments (0)
No comment.
 

Items in the repository are protected by copyright, with all rights reserved, unless otherwise indicated.