干旱区生态环境知识资源中心(Arid): 多枝柽柳和疏叶骆驼刺幼苗生物量分配及根系分布特征

Arid

	多枝柽柳和疏叶骆驼刺幼苗生物量分配及根系分布特征
其他题名	Characteristics of biomass allocation and root distribution of Tamarix ramosissima Ledeb. and Alhagi sparsifolia Shap. seedlings
	曾凡江; 郭海峰; 刘波; 曾杰; 邢文娟; 张晓蕾
来源期刊	干旱区地理
ISSN	1000-6060
出版年	2010
卷号	33 期号:1 页码:59-64
中文摘要	以塔克拉玛干沙漠南缘荒漠-绿洲过渡带上两种主要建群种植物多枝柽柳(Tamarix ramosissima)和疏叶骆驼刺(Alhagi.sparsifolia SHAP.)的一年生幼苗为研究对象,采用人工壕沟全根挖掘法,研究同一生境条件下两种植物幼苗在生物量分配、根冠比、根系分布特征对极端干旱环境的适应特征.结果表明:(1)两种植物幼苗生物量分配策略明显不同.多枝柽柳幼苗把更多的生物量分配到地上,其根冠比为0.75;而疏叶骆驼刺幼苗把更多的生物量分配到地下,其根冠比为1.73.(2)两种植物幼苗地上/地下生物量属于典型的幂函数异速生长关系,异速生长模型的相关系数都在0.83以上.(3)两种植物幼苗根系分布各异.多枝柽柳幼苗根系多由垂直的主根和水平扩展的侧根组成,根长在垂直剖面上近似"丰"字形分布;骆驼刺幼苗根系在土壤中呈网状分布,根长在垂直剖面上近"古"字形分布.
英文摘要	The study took juveniles of T. Ramosissima and A. Sparsifolia as study objects, which are the key species of desert - oasis transition zone in the south fringe of the Taklimakan Desert. The trench method and root tracing method were used to excavate their whole root system. The aim of the experiment is to study the features of the biomass allo-cation, root / shoot ratio and root distribution of two plant juveniles under the same extra-arid habitant condition with comparing their differences. The results shows as follows: (1) Biomass allocation of two plant juveniles are obviously different. T. Ramosissima allocates more biomass into shoots, whose root / shoot ratio is 0. 75. On the contrary, A. Sparsifolia allocates more biomass into roots with root / shoot ratio of 1.73. (2) Relationships between the root and the shoot of two plant juveniles are characterized by the allometry model, their correlation coefficients are larger than 0.83. (3) Root distribution of two plant juveniles is also significantly different. The root system of T. Ramosissima is composed by a vertical main root and some horizontal lateral roots, whose root system distribution is like a Chinese character of "feng" (丰) in its soil vertical profiles. The root system of A. Sparsifolia is composed of the tillers which are net-shaped, whose root system distribution in its soil vertical profiles is like a Chinese character of "gu"(古).
中文关键词	多枝柽柳 ; 疏叶骆驼刺 ; 生物量分配 ; 根冠比 ; 异速生长 ; 根系分布
英文关键词	T. ramosissima, A. sparsifolia biomass allocation root / shoot ratio allometry model root distribution
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:3870199
来源机构	中国科学院新疆生态与地理研究所
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/224981
作者单位	中国科学院新疆生态与地理研究所, 乌鲁木齐, 新疆 830011, 中国
推荐引用方式 GB/T 7714	曾凡江,郭海峰,刘波,等. 多枝柽柳和疏叶骆驼刺幼苗生物量分配及根系分布特征[J]. 中国科学院新疆生态与地理研究所,2010,33(1):59-64.
APA	曾凡江,郭海峰,刘波,曾杰,邢文娟,&张晓蕾.(2010).多枝柽柳和疏叶骆驼刺幼苗生物量分配及根系分布特征.干旱区地理,33(1),59-64.
MLA	曾凡江,et al."多枝柽柳和疏叶骆驼刺幼苗生物量分配及根系分布特征".干旱区地理 33.1(2010):59-64.