干旱区研究

干旱区研究 ›› 2011, Vol. 28 ›› Issue (6): 1025-1030.

• 植物生态 • 上一篇    下一篇

祁连山北坡天然草地根冠比与气候因子的关系

 黄德青, 于兰, 张耀生, 赵新全   

    1. 中国科学院西北高原生物研究所 高原生物适应与进化重点实验室, 青海 西宁 810001
    2. 桂林师范高等专科学校 化工系, 广西 桂林 541002
    3. 桂林医学院 基础医学院, 广西 桂林 541004
  • 收稿日期:2010-09-22 修回日期:2011-05-27 出版日期:2011-11-15 发布日期:2012-01-16
  • 作者简介:黄德青(1980-), 男, 山东定陶人, 讲师, 主要从事植物系统进化和生态适应方面的研究.E-mail: huangdeqing2008@163.com
  • 基金资助:

    国家科技支撑计划项目(2009BAC61B03-1,2006BAC01A02);中国科学院西部行动计划项目(KZCX2XB20601);中国科学院知识创新工程重大项目(kzcx1-09-01);中国科学院西北高原生物研究所知识创新重点研究领域项目(cjc020144)

Study on Rootshoot Ratios of Natural Grasslands and Their Relationships with Climatic Factors in the Northern Slopes of the Qilian Mountains

 HUANG  De-Qing, YU  Lan, ZHANG  Yao-Sheng, ZHAO  Xin-Quan   

    1. Key Laboratory of Adaptability and Evolution of Plateau Biota, Northwest Institute of Plateau Biology, Chinese Academy of Sciences, Xining 810001, China
    2. Department of Chemistry and Technology, Guilin Normal College, Guilin 541002, China
    3. School of Basic Medicine Science, Guilin Medical College, Guilin 541004, China
  • Received:2010-09-22 Revised:2011-05-27 Published:2011-11-15 Online:2012-01-16

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被引次数

12

摘要： 利用祁连山北坡5类天然草地地上/地下生物量和同期的气象资料，分析5类草地的根冠比（R/S）与气候因子的关系。结果表明：5类草地生物量为山地草甸＞山地草原＞山地草甸草原＞高寒草原＞山地荒漠草原，除高寒草原、山地草甸草原和山地草原的生物量之间无显著差异外，其余各类之间差异显著（P＜0.05）；高寒草原、山地草甸、山地草甸草原、山地草原和山地荒漠草原的R/S分别为9.3，8.7，5.1，7.0和7.1；5类草地R/S的季节变化均呈反抛物线型，但变化不尽相同；高寒草原的月R/S随上月土壤含水量的增加而显著降低，山地草甸草原和山地草原的月R/S随上月潜在蒸散量的增加也呈显著降低趋势，而山地草甸和山地荒漠草原的月R/S与前期的水热因子无显著相关关系。

关键词: 天然草地, 生态系统, 生物量, 根冠比, 气候因子, 祁连山

Abstract: In this paper, the relationships between the rootshoot ratios and meteorological factors were analyzed using the data of aboveground and underground biomasses of five types of natural grasslands and the synchronous meteorological data in northern slope of the Qilian Mountains. The results indicated that the biomass of five types of natural grasslands was in an order of mountain meadow > mountain steppe > mountain meadow steppe > alpine steppe > mountaindesert grasslands; difference of the biomass among the five types of natural grasslands was significantly except that among alpine steppe, mountain meadow steppe and mountain steppe (P＜0.05); rootshoot ratios of alpine steppe, mountain meadow, mountain meadow steppe, mountain steppe and mountaindesert grasslands were 9.3, 8.7, 5.1, 7.0 and 7.1 respectively; there was a reverseparabolashaped seasonal variation in curves of rootshoot ratios of the five types of natural grasslands, but the seasonal variation of their rootshoot ratios was different; rootshoot ratio of alpine steppe was significantly decreased with the increase of soil moisture content in previous month, the rootshoot ratios of mountain meadow steppe and mountain steppe were significantly decreased with the increase of potential evapotranspiration in previous month, but there was no significant correlation between the rootshoot ratios of mountain meadow and mountaindesert grasslands and the hydrological and sunshine factors in previous month.

Key words: natural grassland, biomass, root-shoot ratio, climatic factor, the Qilian Mountains

中图分类号: 

  • Q948.11