Age Structures of Modular Biomass of Leymus secalimus Populations in the Different Stages of Vegetative Restoration on Coal Ash Storing Pools of Thermal Power Plant, Kerqin Steppe Region

doi:10.11733/j.issn.1007-0435.2005.02.010

›› 2005, Vol. 13 ›› Issue (2): 130-133.DOI: 10.11733/j.issn.1007-0435.2005.02.010

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Age Structures of Modular Biomass of Leymus secalimus Populations in the Different Stages of Vegetative Restoration on Coal Ash Storing Pools of Thermal Power Plant, Kerqin Steppe Region

YANG Yun-fei¹, SONG Xiang-hua²

1. Institute of Grassland Science, Northeast Normal University, Changchun, Jilin Province 130024, China;
2. Thermal Power Plant, Tongliao, Inner Mongolia Autonomous Region 028000, China

Received:2004-06-02 Revised:2004-09-14 Online:2005-05-15 Published:2005-05-15

科尔沁草原区火电厂储灰池植被恢复阶段赖草种群生物量年龄结构

杨允菲¹, 宋向华²

1. 东北师范大学草地研究所, 长春, 130024;
2. 通辽发电总厂, 通辽, 028000

作者简介:杨允菲(1956- ),女,教授,博士生导师,主要从事草地生态学和植物种群生态学研究,E-mail:yangyf@nenu.edu.cn
基金资助:
国家自然科学基金项目(30270260,30070137)

Abstract

Abstract: Leymus secalimus is a fine and typical clonal plant, which distributes widely in the sandy soil of Kerqin steppe region. L. secalimus tiller nodes and rhizomes could live 4 years in Kerqin steppe region of Inner Mongolia. In mid-August, the rhizomes of the clonal populations consisted of four age classes in the 12-year vegetation restoration plot and three age classes in the 5-year vegetation restoration plot. Stable age structure was shown on the rhizome biomass unit area. During two restoration stages, the tillers were composed of two age classes; the tiller biomass showed expanding age structure; and the shorter the restoration term, the more obvious was the expanding age structure. The productivity of one-age class tillers was higher than that of two-age class tillers in the two plots. The matter storage of different age class rhizomes boasted great ecological plasticity.

Key words: Leymus secalimus, Clone plant, Population module, Biomass, Age structure

摘要： 对不同植被恢复阶段赖草(Leymus secalimus)种群分蘖株和根茎构件生物量年龄结构进行了测定与分析。结果表明:在科尔沁草原,赖草的分蘖节和根茎均可存活4个年度;8月中旬,植被恢复12年和5年储灰池中赖草无性系种群的根茎分别由4和3个龄级组成,根茎生物量均呈稳定型年龄结构;两个恢复阶段赖草无性系种群的分蘖株均由两个龄级组成,生物量均为增长型的年龄结构,恢复时间短者增长型结构尤为明显;赖草无性系种群1龄级分蘖株的生产力均高于2龄级,各龄级根茎的物质贮藏具有较大的生态可塑性。

关键词: 赖草, 无性系植物, 种群构件, 生物量, 年龄结构

CLC Number:

Q945.3
Q948

YANG Yun-fei, SONG Xiang-hua. Age Structures of Modular Biomass of Leymus secalimus Populations in the Different Stages of Vegetative Restoration on Coal Ash Storing Pools of Thermal Power Plant, Kerqin Steppe Region[J]. , 2005, 13(2): 130-133.

杨允菲, 宋向华. 科尔沁草原区火电厂储灰池植被恢复阶段赖草种群生物量年龄结构[J]. , 2005, 13(2): 130-133.

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Age Structures of Modular Biomass of Leymus secalimus Populations in the Different Stages of Vegetative Restoration on Coal Ash Storing Pools of Thermal Power Plant, Kerqin Steppe Region

科尔沁草原区火电厂储灰池植被恢复阶段赖草种群生物量年龄结构

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