[1]洪江涛,吴建波,王小丹.藏北高寒草原紫花针茅根系碳氮磷生态化学计量学特征[J].山地学报,2014,(04):467.
　HONG Jiangtao,WU Jianbo,WANG Xiaodan.Root C∶N∶P Stoichiometry of Stipa purpurea in Apine Steppe on the Northern Tibet[J].Mountain Research,2014,(04):467.
点击复制

藏北高寒草原紫花针茅根系碳氮磷生态化学计量学特征()
分享到：

《山地学报》[ISSN:1008-2186/CN:51-1516]

卷:
期数:
2014年04期
页码:
467
栏目:
青藏高原植被
出版日期:
2014-04-01

文章信息/Info

Title:
Root C∶N∶P Stoichiometry of Stipa purpurea in Apine Steppe on the Northern Tibet
作者:
洪江涛; 吴建波;  王小丹
1．中国科学院水利部成都山地灾害与环境研究所，山地表生过程与生态调控重点实验室，四川 成都 610041；
2.中国科学院大学，北京 100049
Author(s):
HONG Jiangtao;  WU Jianbo;  WANG Xiaodan
1.Key Laboratory of Mountain Surface Processes and Ecological Regulation, Institute of Mountain Hazards and Environment, Chinese Academy of Sciences, Chengdu 610014, China;
2.University of Chinese Academy of Sciences, Beijing 100049, China
关键词:
紫花针茅; 根系; 地理因子; 气候因子; 土壤营养
Keywords:
Stipa purpurea; root; geographic factors; climate factors; soil nutrient concentrations
分类号:
Q142
文献标志码:
A
摘要:
植物碳（C）、氮（N）和磷（P）元素平衡是当前生物地球化学循环和全球变化生态学研究的热点和焦点。以往关于植物营养元素的研究多集中于植物叶片水平，而对植物根系元素的研究较少。为此，沿藏北高寒草原安多-那曲-班戈-申扎-尼玛-改则-革吉-噶尔样带，在34个样点采集优势物种紫花针茅（Stipa purpurea）根系样品，分析其C、N和P元素含量及其相互比值与环境因子的关系。研究结果显示：紫花针茅根系C、N和P含量变化范围分别为357.17~458.99 mg/g，6.49~16.42 mg/g，和0.22~0.77 mg/g；紫花针茅根系N含量与全球植物根系平均值基本一致，但是其根系P含量低于全球平均值；紫花针茅根系C∶N∶P生态化学计量学特征受纬度、经度、生长季降水量、土壤磷含量的影响较为显著，而海拔、生长季均温和土壤氮含量对其影响则不显著。紫花针茅通过对高寒环境因子的长期适应，其根系C∶N∶P生态化学计量学特征已经形成了一定的空间分布格局。研究结果有助于揭示极端环境下植物对营养物质的分配和利用策略，为应对未来气候变化对高寒生态系统的影响提供参考。
Abstract:
Plant carbon, nitrogen, and phosphorus balance has been a hotspot and focus of biogeochemical cycle and global change ecology research. However, previous studies mainly focused on the nutrient of leaves, relatively few study were conducted on the root. In present study, we investigated root C∶N∶P of S. purpurea and its relationships with environmental factors at 34 sites along a 1 300 km transect (Anduo-Naqu-Bange-Shenzha-Nima-Gaize-Geji-Gaer) across the alpine grassland of Northern Tibet. The result showed that root C, N and P concentrations ranged from 357.17 to 458.99 mg/g, 6.49 to16.42 mg/g, 0.22 to 0.77 mg/g, respectively. The root N concentration of S. purpurea had a similar value with the N concentration of global roots, whereas the P concentration was much lower than those of global root. Latitude, longitude and precipitation significantly influcenced root C∶N∶P，while altitude and temperature had no effects on root C∶N∶P stoichiometry. Our research suggested that the strong relationship between root C∶N∶P stoichiometry and geographic, climate factors and soil nutrient concentrations reveal that, to some extent, stoichiometry characteristics of S. purpure are adaptive to local environmental factors. Exploring the influences of environmental factors on root C∶N∶P stoichiometry is helpful for us to reveal plant nutrients allocation and utilization strategies in extreme environments, offering insights into quantifying the responses of alpine ecosystem to future climate changes.

备注/Memo

备注/Memo:
收稿日期(Received date)：2013-12-30；修回日期（Accepted）：2014-04-23。
基金项目（Foundation item）：中国科学院战略性先导科技专项（XDB03030505）和中科院成都山地所“一三五”项目（sds-135-1203-02）资助。\[Supported by”Strategic Priority Rearearch Program” of Chinese Academy of Sciences (XDB03030505) and the 135 Strategic Program of Institute of Mountain Hazards and Environment（sds-135-1203-02）.\]
作者简介（Biography）：洪江涛（1986-），男，安徽宁国人，在读博士生，主要从事草地生态化学计量方面的研究。\[Hong Jiangtao（1986-），male，Anhui Ningguo person，Ph D student，mainly engaged in research on grassland ecological stoichiometry.\] E-mail：hongjiangtao10@163.com，Tel：13488946552 *
通信作者(Corresponding author):王小丹（1973-），男，四川西充人，博士生导师，研究员，主要从事高山环境与高寒生态研究。\[Wang Xiaodan（1973-），male，Sichuan Xichong person，Ph D supervisor，Professor，mainly engaged in research on alpine environment and ecology.\]
更新日期/Last Update: 1900-01-01