干旱区生态环境知识资源中心(Arid): 胡杨（Populus euphratica）在额济纳绿洲三种生境内的根蘖繁殖特性

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	胡杨（Populus euphratica）在额济纳绿洲三种生境内的根蘖繁殖特性
其他题名	The charactertics of root suckers of Populus euphratica Oliv. in three habitats of Ejina oasis
	武逄平; 李俊清; 李景文; 程春龙; 王旭航
ISSN	1000-0933
出版年	2008
卷号	28 期号:10 页码:4703-4709
中文摘要	以额济纳荒漠绿洲胡杨根蘖幼苗为研究对象，通过对绿洲内胡杨分布的3种主要生境内根蘖幼苗的调查，得出如下结论。近年来绿洲内胡杨种群的更新几乎完全依赖于无性繁殖更新，种子萌发产生的幼苗在调查地内没有发现。河岸沙丘地及胡杨林下地的根蘖幼苗中，3龄幼苗所占比重最大，龄级越小的根蘖苗在群落中的数量越少；在河水漫灌后的林间空地，2龄幼苗的数量最多。水漫灌后的林间空地中根蘖幼苗密度显著大于其余两生境内根蘖幼苗密度，同时该生境内每段胡杨根系萌生出的不定芽也大于另两生境。随着龄级增加，未枯枝根蘖幼苗的比率逐渐减小。根蘖幼苗的萌发点分布于土层30cm以内的根系上，分布深度大于30cm的根系不能萌发出根蘖幼苗。
英文摘要	The characteristics of root suckers of Populus euphratica, in Ejina oasis were studied in this research. The field investigation of root suckers in three habitats were carried out in the research areas. The results indicated that the asexual reproduction was the main regeneration approach for Populus euphratica in the last several years, there had no seed reproduced seedlings in the sample plots. In the habitats of sand dune and forest floor, 3-year-old root suckers had the higher proportion compared with the number of 1-year-old and 2-year-old suckers. The younger the root suckers were, the less proportion the root sucker occupied. In the habitat of seasonal flooding area, the 2-year-old suckers were with the largest number. The root suckers density in the the seasonal flooding area was obviously higher than the density in other two habitats, as well as the number of adventitious buds per root. Along with the root sucker aging, the proportion of the suckers without dead branches declined. The root suckers regeneration all happened in the root systems which distributed in k soil layer above 30 cm underground, there had no root suckers recruited under 30cm.
中文关键词	胡杨 ; 根蘖幼苗 ; 生境
英文关键词	Populus euphratica Oliv. Root suckers Habitats
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:3420915
来源机构	北京林业大学
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/222698
作者单位	北京林业大学, 省部共建森林培育与保护教育部重点实验室, 北京 100083, 中国
推荐引用方式 GB/T 7714	武逄平,李俊清,李景文,等. 胡杨（Populus euphratica）在额济纳绿洲三种生境内的根蘖繁殖特性[J]. 北京林业大学,2008,28(10):4703-4709.
APA	武逄平,李俊清,李景文,程春龙,&王旭航.(2008).胡杨（Populus euphratica）在额济纳绿洲三种生境内的根蘖繁殖特性.,28(10),4703-4709.
MLA	武逄平,et al."胡杨（Populus euphratica）在额济纳绿洲三种生境内的根蘖繁殖特性".28.10(2008):4703-4709.