干旱区生态环境知识资源中心(Arid): 乌兰布和沙漠沙冬青群落的根系分布特征

Arid

	乌兰布和沙漠沙冬青群落的根系分布特征
其他题名	Root distribution characteristics of Ammopiptanthus mongolicus community in Ulan Buh Desert
	齐凯 1; 辛智鸣 2; 张景波 2; 朱雅娟 1
来源期刊	草业科学
ISSN	1001-0629
出版年	2019
卷号	36 期号:7 页码:1706-1715
中文摘要	通过全挖法研究了乌兰布和沙漠沙冬青(Ammopiptanthus mongolica)与6种伴生植物不同土壤深度各径级根系的干重和根长,分析了7种植物根系分布的空间差异。结果表明,该群落内7种植物的根系可以分为4类,其中,灌木沙冬青根系最深,主要分布在120 cm土层以内;其次是两种半灌木旱蒿(Artemisia xerophytica)和黑沙蒿(A. ordosica),根系分别主要分布在80和70 cm土层内;多年生草本植物内蒙古棘豆(Oxytropis neimonggolica)主要分布在50 cm土层内;两种多年生草本植物蒙疆苓菊(Jurinea mongolica)、蒙古韭(Allium mongolicum)和一年生草本植物蒙古虫实(Corispermum mongolicum)根系较浅,分别主要分布在30、20和10 cm土层内。根系最大深度排序为沙冬青(160 cm) >旱蒿(130 cm) >黑沙蒿(100 cm) >内蒙古棘豆(80 cm) >蒙疆苓菊(30 cm) >蒙古韭(20 cm)和蒙古虫实(20 cm)。因此,沙冬青群落的7种植物通过不同径级根系分布的空间差异利用不同深度的土壤水分,从而促进物种共存,提高了群落的植物多样性。
英文摘要	The method of oven-drying and stratified digging was adopted to study the dry mass and length of roots of varied diameters of Ammopiptanthus mongolicus and its associated plants in the community, and the spatial differences in root distribution of different plants at different soil depths were analyzed in A. mongolica community in Ulan Buh desert.The results showed that there are four types of root systems based on their distribution depth for the seven plants in this community. The shrub A. mongolicus has the deepest root, which was mainly distributed in soil up to 120 cm. The root of two sub-shrubs, Artemisia xerophytica and A. ordosica, were mainly distributed within 80 cm and 70 cm depth, respectively. The root of the perennial herb Oxytropis neimonggolica was mainly distributed within 50 cm depth. Two perennial herbs, Jurinea mongolica and Allium mongolicum, and the annual herb Corispermum mongolicum have shallow root systems, which are mainly distributed within 30 cm, 20 cm, and 10 cm depth, respectively. The order of the maximal root depth was: A. mongolicus (160 cm) > A. xerophytica (130 cm) > A. ordosica (100 cm) > O. neimonggolica (80 cm) > J. mongolica (30 cm) > A. mongolicum (20 cm), and C. mongolicum (20 cm). Therefore, utilization of soil water in different soil depths is achieved through spatial differences in the distribution of roots having different diameters, which promotes the coexistence of species and improves plant diversity in A. mongolicus community.
中文关键词	沙冬青 ; 伴生植物 ; 根系分布 ; 根系直径 ; 干重 ; 根长
英文关键词	Ammopiptanthus mongolicus associated plant root distribution root diameter dry mass root length
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:6541602
来源机构	中国林业科学研究院荒漠化研究所 ; 中国林业科学研究院沙漠林业实验中心
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/238960
作者单位	1.中国林业科学研究院荒漠化研究所, 北京 100091, 中国; 2.中国林业科学研究院沙漠林业实验中心, 磴口, 内蒙古 015200, 中国
推荐引用方式 GB/T 7714	齐凯,辛智鸣,张景波,等. 乌兰布和沙漠沙冬青群落的根系分布特征[J]. 中国林业科学研究院荒漠化研究所, 中国林业科学研究院沙漠林业实验中心,2019,36(7):1706-1715.
APA	齐凯,辛智鸣,张景波,&朱雅娟.(2019).乌兰布和沙漠沙冬青群落的根系分布特征.草业科学,36(7),1706-1715.
MLA	齐凯,et al."乌兰布和沙漠沙冬青群落的根系分布特征".草业科学 36.7(2019):1706-1715.