干旱区生态环境知识资源中心(Arid): 干旱半干旱区降水量梯度下植物群落的叶,茎属性特征

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	干旱半干旱区降水量梯度下植物群落的叶,茎属性特征
其他题名	Leaf and stem traits of plant communities along rainfall gradient in arid and semi-arid areas
	龚春梅 1; 王根轩 2
来源期刊	干旱地区农业研究
ISSN	1000-7601
出版年	2010
卷号	28 期号:4 页码:69-75
中文摘要	通过对沿年均降水量减少的兰州,白银,景泰和临泽4个试验点不同科属植物进行野外调查与室内分析,试图明确干旱区降水量梯度下植物叶,茎属性〔比叶重(LMA),单位面积氮含量(Narea)和单位面积叶绿素含量(Chlarea)〕的变化并探讨其对渐进干旱胁迫的适应规律.结果表明:降雨量梯度下叶,茎利用不同属性特征应对干旱胁迫,LMA和Narea含量随干旱胁迫的加剧而增大, Chlarea含量随干旱胁迫的加剧而降低,这在一定程度上体现了研究区域植物对干旱胁迫加强的适应规律.另外随年均降水量的减少,临泽,景泰,白银,兰州其物种的绿色茎枝/叶生物量比依次减小.即随干旱胁迫的加剧,干旱区植物绿色茎枝与叶片生物量的比例逐渐增大
英文摘要	Plant leaf and stem traits include the leaf mass per areas(LMA), leaf life span(LL), nitrogen content per unit area(Narea) and the chlorophyll content per unit area(Chlarea). These features, directly affecting the properties of carbon sequestration capacity of plants, are the adaptation strategies of plants resistant to the environment in the long process of production in order to obtain maximum photosynthetic formation. This study is to identify plant leaf and stems traits(LMA, Narea and Chlarea) and explore the changes of adapting to progressive drought stress along rainfall gradient in arid and semi-arid areas. The results show that different families and genera of plants distributed in Lanzhou, Baiyin, Jingtai and Linze experimental sites take different attributes of leaf, stem or branch response characteristics against drought stress with annual mean precipitation reducing. The LMA and content of Narea increase with intensification of drought stress and Chlarea content increases with the decline of drought stress, which reflects the strengthening of plant adaptation to drought stress in some extent. In addition, green stem or branch/leaf biomass ratio in Linze species is the largest with annual mean precipitation reducing, followed by Jingtai species, even Baiyin species, whereas Lanzhou species is the smallest. With the increase of drought stress, the biomass ratio of green stem or branch/leaf is gradually increasing in dry areas
中文关键词	降水量梯度 ; 枝/叶生物量比
英文关键词	LMA Narea Chlarea rainfall gradient LMA Narea Chlarea biomass ratio of green stem or branch/leaf
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:4057409
来源机构	西北农林科技大学
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/224961
作者单位	1.西北农林科技大学生命科学学院, 杨凌, 陕西 712100, 中国; 2.浙江大学生命科学学院农业生态工程研究所, 杭州, 浙江 310058, 中国
推荐引用方式 GB/T 7714	龚春梅,王根轩. 干旱半干旱区降水量梯度下植物群落的叶,茎属性特征[J]. 西北农林科技大学,2010,28(4):69-75.
APA	龚春梅,&王根轩.(2010).干旱半干旱区降水量梯度下植物群落的叶,茎属性特征.干旱地区农业研究,28(4),69-75.
MLA	龚春梅,et al."干旱半干旱区降水量梯度下植物群落的叶,茎属性特征".干旱地区农业研究 28.4(2010):69-75.