Correlation between Growing Character of Main Species and Ground Temperature in Kobresia Meadow

doi:10.11733/j.issn.1007-0435.2012.02.009

›› 2012, Vol. 20 ›› Issue (2): 250-256.DOI: 10.11733/j.issn.1007-0435.2012.02.009

Correlation between Growing Character of Main Species and Ground Temperature in Kobresia Meadow

ZHAO Jian-zhong^1,2,3, PENG Min¹, LIU Wei¹, WANG Xi¹, YE Run-rong¹, ZHOU Hua-kun¹, LU Xue-feng¹, ZHOU Yu-bi¹, YANG Yue-qing^1,2

1. Northwest Institute of Plateau Biology, CAS, Xining, Qinghai Province 810001, China;
2. Graduate University of Chinese Academy of Sciences, Beijing 100039, China;
3. Grassland Station in Qinhai Province, Xining, Qinghai Province 810001, China

Received:2011-10-08 Revised:2012-01-10 Online:2012-04-15 Published:2012-07-05

矮嵩草草甸不同功能群主要植物种生长特征与地温的相关性分析

赵建中^1,2,3, 彭敏¹, 刘伟¹, 王溪¹, 叶润蓉¹, 周华坤¹, 卢学峰¹, 周玉碧¹, 杨月琴^1,2

1. 中国科学院西北高原生物研究所, 青海西宁 810001;
2. 中国科学院研究生院, 北京 100039;
3. 青海省草原总站, 青海西宁 810001

通讯作者: 彭敏,E-mail:pengm@nwipb.cas.cn
作者简介:赵建中(1980- ),男,青海乐都人,博士研究生,畜牧(草原)师,主要从事草地生态学研究,E-mail:jianzhoz@163.com
基金资助:
973计划课题专题(2009CB421102);国家自然科学基金面上项目(31172247);国家自然科学基金重点项目(41030105)资助

Abstract

Abstract: Based on the International Tundra Experiment (ITEX) method, the correlation between major plants of functional groups and ground temperature was studied in Kobresia meadow at the individual level using temperature gradients. Results showed a linear correlation between the height of Carex alrofusca (Cyperaceae functional group) and ground temperature(P<0.01), but there was no significant quadratic correlation between the number of tillers, leaves and the ground temperature. There was significant quadratic correlation between the numbers of tiller, leaf, the height of Kobresia humilis and ground temperature(P<0.05). There was significant linear correlation between the numbers of tiller, leaf and the height of Elymus nutans, Poa pratensis (Gramineous functional group) and ground temperature (P<0.01). There was significant quadratic correlation between stolon numbers of Lagotis brachystachya (forbs functional group) and ground temperature, but there were linear correlations between the numbers of leaf, the height of Lagotis brachystachya and ground temperature. There were significant linear correlations between the numbers of leaf, bud and the height of Ranunculus brotherusii and ground temperature (P<0.01). Different functional groups had different response to ground temperature. If ground temperature continues to rise, species of Gramineous functional group will benefit while species of Cyperaceae functional group and forbs functional group will decline.

Key words: Kobresia meadow, Functional plant group, Growing character, Underground temperature, Correlation

摘要： 基于国际冻原计划(ITEX)模拟增温效应对植物影响的研究方法,设置温度梯度从物种个体水平研究各功能群主要植物种生长特征与地温的相关性,旨在探讨全球变暖背景下,矮嵩草草甸各功能群植物种生长特征对地温升高的响应。结果表明:莎草科功能群植物黑褐苔草(Carex alrofusca)的高度与地温呈线性关系(P<0.01),而分蘖数、叶片数与地温呈二次函数关系,但不显著;矮嵩草(Kobresia humilis)的分蘖数、叶片数及高度与地温均呈二次函数形式变化(P<0.05)。禾本科功能群植物垂穗披碱草(Elymus nutans)和草地早熟禾(Poa pratensis)的分蘖数、叶片数、高度均与地温呈线性正相关关系(P<0.01)。杂类草功能群植物短穗兔耳草(Lagotis brachystachya)的匍匐茎数与地温呈二次函数关系,但不显著,而其叶片数、高度均与地温呈线性相关关系(P<0.01);鸟足毛茛(Ranunculus brotherusii)的花蕾数、叶片数、高度均与地温均呈线性相关关系(P<0.01)。综上表明,不同功能群植物种对地温升高的响应是不一致的,如果地温持续升高对禾本科功能群植物种的生长有利,而对莎草科和杂类草功能群植物种均不利。

关键词: 矮嵩草草甸, 功能群, 生长特征, 地温, 相关性

CLC Number:

Q948.1

ZHAO Jian-zhong, PENG Min, LIU Wei, WANG Xi, YE Run-rong, ZHOU Hua-kun, LU Xue-feng, ZHOU Yu-bi, YANG Yue-qing. Correlation between Growing Character of Main Species and Ground Temperature in Kobresia Meadow[J]. , 2012, 20(2): 250-256.

赵建中, 彭敏, 刘伟, 王溪, 叶润蓉, 周华坤, 卢学峰, 周玉碧, 杨月琴. 矮嵩草草甸不同功能群主要植物种生长特征与地温的相关性分析[J]. , 2012, 20(2): 250-256.

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Correlation between Growing Character of Main Species and Ground Temperature in Kobresia Meadow

矮嵩草草甸不同功能群主要植物种生长特征与地温的相关性分析

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