干旱区生态环境知识资源中心(Arid): 石羊河上游干旱草原阴山扁蓿豆群落土壤种子库

Arid

	石羊河上游干旱草原阴山扁蓿豆群落土壤种子库
其他题名	Soil Seed Bank of Melilotoides Ruthenicus var. Inschanicus Community on the Arid Grassland in the Upstream Area of Shiyang River
	董小刚; 赵成章; 张起鹏; 周伟; 姚强
ISSN	1000-288X
出版年	2009
卷号	29 期号:6 页码:41-45,63
中文摘要	土壤种子库是地上植被补充更新的源泉,土壤种子库的研究已成为植物种群生态学研究中相当活跃的领域.在石羊河上游干旱草原选择阴山扁蓿豆草地群落,研究了草地土壤种子库的物种组成、密度、多样性特征以及与地上植被的关系.结果表明,阴山扁蓿豆草地群落土壤种子库共有20个物种,分属12科.随阴山扁蓿豆分盖度减小,土壤种子库密度和种类在水平方向上增加,种子库密度垂直分布呈现0-5cm>10-15 cm>5-10 cm土层,物种数量随深度而减少;在阴山扁蓿豆分盖度>60%的草地群落未发现其种子库的存在.土壤种子库的Margalef丰富度指数、Shannon-Wiener多样性指数和Pielow均匀度指数随阴山扁蓿豆盖度减小呈上升趋势,生态优势度由0.46下降至0.24;各草地群落土壤种子库与地上植被的相似性系数在0.29～0.58之间.
英文摘要	Soil seed bank is the renewal source of standing vegetation and researches on it become quite active in the area of plant population ecology. This paper studies the species composition, density, diversity, and the relationship between seed and standing vegetation about soil seed bank of Melilotoides ruthenicus var. Inschanicus community on the arid grassland in the upstream area of Shiyang River. Results showed that a total of 20 plant species belonging to 12 families were found in the soil seed bank. The density and specie of soil seed bank increased with the decrease in Melilotoides ruthenicus var. Inschanicus’s coverage in the horizontal distribution. The vertical distribution of density changed in the order of 0-5 cm>10-15 cm > 5-10 cm soil depth, but the species decreased with the increased depth. There was no seed exist in the grassland community where the Melilotoides ruthenicus var. Inschanicus’s coverage is more than 60%. With the decrease in Melilotoides ruthenicus var. Inschanicus’s coverage, the Margalef richness index, Shannon-Wiener diversity index, and Pielow evenness index of the soil seed bank showed a rising trend, but ecological dominance showed a descending trend, decreasing from 0.46 to 0.24. The similarity coefficient of the soil seed bank and standing vegetation varied from 0.29 to 0.58.
中文关键词	阴山扁蓿豆群落 ; 退化草地 ; 土壤种子库 ; 石羊河上游
英文关键词	Melilotoides ruthenicus var. inschanicus community degraded grassland: soil seed bank upstream area of Shiyang River
语种	中文
国家	中国
收录类别	CSCD
WOS类目	AGRICULTURE MULTIDISCIPLINARY
WOS研究方向	Agriculture
CSCD记录号	CSCD:3806874
来源机构	西北师范大学
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/224175
作者单位	西北师范大学,地理与环境科学学院, 兰州, 甘肃 730070, 中国
推荐引用方式 GB/T 7714	董小刚,赵成章,张起鹏,等. 石羊河上游干旱草原阴山扁蓿豆群落土壤种子库[J]. 西北师范大学,2009,29(6):41-45,63.
APA	董小刚,赵成章,张起鹏,周伟,&姚强.(2009).石羊河上游干旱草原阴山扁蓿豆群落土壤种子库.,29(6),41-45,63.
MLA	董小刚,et al."石羊河上游干旱草原阴山扁蓿豆群落土壤种子库".29.6(2009):41-45,63.