干旱区生态环境知识资源中心(Arid): 干旱荒漠区狭叶锦鸡儿灌丛扩展对策

Arid

	干旱荒漠区狭叶锦鸡儿灌丛扩展对策
其他题名	Expansion strategies of Caragana stenophylla in the arid desert region
	张建华; 马成仓; 刘志宏; 高玉葆
来源期刊	生态学报
ISSN	1000-0933
出版年	2011
卷号	31 期号:8 页码:2132-2138
中文摘要	通过对内蒙古干旱荒漠区狭叶锦鸡儿集群的灌丛结构,分株特征,繁殖倾向和分枝特征的调查,探讨荒漠区狭叶锦鸡儿的繁殖特点和灌丛扩展对策.研究表明:在荒漠区,狭叶锦鸡儿的营养繁殖占主导地位,主要是由根萌蘖产生无性系分株,其克隆生长构型为密集型.根系萌蘖,枝条的不定根繁殖,地上枝条不断分枝和新老个体形成复合灌丛是荒漠区狭叶锦鸡儿冠幅增大的主要原因.狭叶锦鸡儿通过克隆繁殖,灌丛扩大化和发达的根系适应荒漠区的干旱贫瘠环境,使其成为荒漠区的优势种
英文摘要	The drought resistant shrub, Caragana stenophylla,is distributed mainly in the arid and semi-arid areas of the Inner Mongolia Plateau, China. C.stenophylla is an important fodder plant, and is known as "lifesaving plants" for the livestock in arid and semi-arid areas. In addition,it plays an important role in sand dune fixation and water conservation. We found that C.stenophylla individuals had only a few branches in the eastern grassland region of the Inner Mongolia Plateau, but in the western desert region,it formed the large shrubs with diameter of 1.5-2.0 m, accompanied by a sand dune with high of 50-70cm, and showed strong sand-fixing ability. We hypothesized that such structural difference was due to the expansion strategies of C.stenophylla in desert region. In order to understand the expansion strategies and reproductive characteristics of C.stenophylla in the arid desert region,we studied the shrub structure, ramet characteristics, breeding tendency and branching characters of C.stenophylla clusters. The results showed that,in the arid desert region,C.stenophylla reproduced mainly by asexual reproduction. It reproduced ramets mainly by root germination and it had a clonal architecture of "phalanx".The ramets of C.stenophylla can separate from their parents and grow independently when spacer connecting ramets died and decomposed, which reduced the death risk of ramets being implicated each other. The C.stenophylla can also reproduced by branches which were buried by sand forming adventitious roots and shoots. When seed germination and seedling establishment is restricted by drought and animal predation, asexual reproduction can compensate for the shortage of seedlings, thereby maintain population stability. Thus, asexual propagation might be an important regeneration strategy for C.stenophylla in harsh environments. The stepwise bifurcation ratio of C.stenophylla was SBR3:4
中文关键词	狭叶锦鸡儿 ; 无性繁殖 ; 灌丛扩展 ; 干旱荒漠区
英文关键词	Caragana stenophylla asexual reproduction shrub expansion arid desert region
语种	中文
国家	中国
收录类别	CSCD
WOS类目	ECOLOGY
WOS研究方向	Environmental Sciences & Ecology
CSCD记录号	CSCD:4182710
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/226906
作者单位	天津师范大学生命科学学院, 天津 300387, 中国
推荐引用方式 GB/T 7714	张建华,马成仓,刘志宏,等. 干旱荒漠区狭叶锦鸡儿灌丛扩展对策[J],2011,31(8):2132-2138.
APA	张建华,马成仓,刘志宏,&高玉葆.(2011).干旱荒漠区狭叶锦鸡儿灌丛扩展对策.生态学报,31(8),2132-2138.
MLA	张建华,et al."干旱荒漠区狭叶锦鸡儿灌丛扩展对策".生态学报 31.8(2011):2132-2138.