img

官方微信

img

群号:冰川冻土交流群

QQ群:218834310

高级检索

冰川冻土 ›› 2015, Vol. 37 ›› Issue (5): 1388-1395.doi: 10.7522/j.isnn.1000-0240.2015.0153

• 寒旱区生物学 • 上一篇    下一篇

青藏高原不同生境中祁连圆柏叶片δ13C变化及其与环境和树高的关系

张有福1, 陈拓2, 张鹏2, 徐国保2   

  1. 1. 河南科技大学 农学院, 河南 洛阳 471003;
    2. 中国科学院 寒区旱区环境与工程研究所 冰冻圈科学国家重点实验室, 甘肃 兰州 730000
  • 收稿日期:2015-05-06 修回日期:2015-07-12 出版日期:2015-10-25 发布日期:2016-03-28
  • 通讯作者: 陈拓,E-mail:chentuo@lzb.ac.cn. E-mail:chentuo@lzb.ac.cn
  • 作者简介:张有福(1978-),男,甘肃陇西人,副教授,2007年在中国科学院寒区旱区环境与工程研究所获博士学位,主要从事植物生理生态学研究.E-mail:zyfgau@163.com
  • 基金资助:
    国家自然科学基金(31200299;330770342)资助

Foliar δ13C values of Sabina przewalskii in different habitats on the Tibetan Plateau: variation and relation with environmental factors and tree height

ZHANG Youfu1, CHEN Tuo2, ZHANG Peng2, XU Guobao2   

  1. 1. College of Agriculture, Henan University of Science and Technology, Luoyang 471003, Henan, China;
    2. State Key Laboratory of Cryospheric Sciences, Cold and Arid Regions Environmental and Engineering Research Institute, Chinese Academy of Sciences, Lanzhou 730000, China
  • Received:2015-05-06 Revised:2015-07-12 Online:2015-10-25 Published:2016-03-28

摘要: 以分布于青藏高原东北缘的优势乔木祁连圆柏为研究对象,分析了叶片δ13C值变化及其与树高、土壤含水量、降雨量和叶片碳氮含量的关系.研究结果表明:研究区祁连圆柏叶片δ13C值的变化范围为-28.58‰~-23.95‰,平均值为-25.66‰,变化幅度为4.63‰,而同一生境不同个体之间的变化幅度为2.69‰和2.93‰,说明祁连圆柏叶片δ13C值的变化是植物自身遗传特性与环境因子共同作用的结果.叶片δ13C值与树高呈明显的负相关关系(p<0.01),并且这种关系不随采样位点的不同而改变;与叶片C和N含量不相关,而与土壤含水量和年平均降水量显著负相关(p<0.001).

关键词: 祁连圆柏, 叶片δ13C值, 树高, 降水量

Abstract: The foliar stable carbon isotopic composition(δ13C) of Sabina przewalskii Kom., a dominant tree population on the northeast Tibetan Plateau, and its correlation with foliar carbon and nitrogen contents, tree height, precipitation and soil moisture are examined. The results show that δ13C values range from-28.58‰ to-23.95‰, with an average of-25.66‰. The individual variation range of δ13C value, respectively, is 2.69‰ and 2.93‰ in two homogenous habitats, which indicates that the variation of foliar δ13C is determined by both botanical genetic character and environmental factors. The correlation of δ13C with tree height is strongly negative(p<0.01), and the negative correlation do not vary with sample sites. Foliar δ13C do not correlate with foliar nitrogen and carbon contents. The correlations of δ13C with soil moisture and precipitation are remarkably negative(p<0.001).

Key words: Sabina przewalskii Kom., foliar δ13C value, tree height, precipitation

中图分类号: 

  • Q948.11