干旱区生态环境知识资源中心(Arid): 黑河下游不同生境胡杨(Populus euphratica)叶片碳同位素组成特征

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	黑河下游不同生境胡杨(Populus euphratica)叶片碳同位素组成特征
其他题名	Characteristics of Foliar Stable Carbon Isotope Composition of Populus euphraticafor Different Niche in the Lower Reach of the Heihe River
	袁亚鹏; 赵阳; 赵传燕; 李文娟
来源期刊	中国沙漠
ISSN	1000-694X
出版年	2015
卷号	35 期号:6 页码:1505-1511
中文摘要	植物中稳定碳同位素组成不但与植物的水分利用效率密切相关,而且反映环境因子对植物的影响。选择黑河下游额济纳旗为研究区,以优势物种胡杨(Populus euphratica)为研究对象,利用稳定碳同位素组成分析研究区胡杨受干旱胁迫程度。结果表明:胡杨叶稳定碳同位素组成(delta~(13)C)处于-25.51 ~ -30.21,平均值为 -28.28。随干旱胁迫程度增加,delta~(13)C值有明显偏正趋势,植物(叶片)碳同位素组成对胡杨成熟木长期适应不同水分胁迫程度有明显的体现。分析delta~(13)C与胡杨生长状态发现,delta~(13)C与种群密度相关性不明显,与枯枝比呈显著正相关关系,枯枝比可成为碳同位素组成的替代指标,指示胡杨受干旱胁迫的程度。
英文摘要	Foliar stable carbon isotope composition can response the effect of water stress on plant growth and is thus an important demonstrator to the niche where plant grows,especially in arid environments.Therefore,it has become key parameter to be used among researches of relationship between plant growth state and the environmental stress.This study selects Populus euphratica growing in the lower reach of the Heihe River as an object. The niche is poor for P.euphratica.It suffers from drought stress in the form of water and salt stress in the studied area.We analyze the state of drought stress by foliar stable carbon isotope composition(delta~(13)C).The results shows that delta~(13)C ranges from -25.51to-30.21 with a mean value of-28.28.Comparing delta~(13)C with that in other niche where no water stress happens,we found that delta~(13)C value in our study is higher. delta~(13)C increases with the increase of drought stress.It has significant relative to the ratio of died branches to total branches,but no significant relative to the population density.From the results,we can draw conclusion that delta~(13)C can dictate the state of water stress for P.euphratica.The ratio of died branches to total branches can be an important delta~(13)C proxy to indicate the niche of P.euphratica.
中文关键词	黑河 ; 胡杨(Populus euphratica) ; 稳定碳同位素组成 ; 生长态势 ; 枯枝比
英文关键词	Heihe River Populus euphratica stable carbon isotope composition growth state ratio of died branches to total branches
语种	中文
国家	中国
收录类别	CSCD
WOS类目	PLANT SCIENCES
WOS研究方向	Plant Sciences
CSCD记录号	CSCD:5583199
来源机构	兰州大学
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/233788
作者单位	兰州大学, 草地农业生态系统国家重点实验室, 兰州, 甘肃 730000, 中国
推荐引用方式 GB/T 7714	袁亚鹏,赵阳,赵传燕,等. 黑河下游不同生境胡杨(Populus euphratica)叶片碳同位素组成特征[J]. 兰州大学,2015,35(6):1505-1511.
APA	袁亚鹏,赵阳,赵传燕,&李文娟.(2015).黑河下游不同生境胡杨(Populus euphratica)叶片碳同位素组成特征.中国沙漠,35(6),1505-1511.
MLA	袁亚鹏,et al."黑河下游不同生境胡杨(Populus euphratica)叶片碳同位素组成特征".中国沙漠 35.6(2015):1505-1511.