| 呼伦贝尔沙地米氏冰草种群构件年龄结构动态 |
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| 引用本文： | 金晓明,敖永贵,艾琳,宋雪峰,王瑞峰,卢欣石.呼伦贝尔沙地米氏冰草种群构件年龄结构动态[J].草地学报,2011,19(3):367-371,387. |
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| 作者姓名： | 金晓明 敖永贵 艾琳 宋雪峰 王瑞峰 卢欣石 |
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| 作者单位： | 金晓明,JIN Xiao-ming(北京林业大学草地资源与生态实验室,北京,100083;呼伦贝尔学院生命科学学院,呼伦贝尔市,021008);敖永贵,AO Yong-gui(呼伦湖水资源配置工程管理局,呼伦贝尔市,021008);艾琳,宋雪峰,王瑞峰,卢欣石,AI Lin,SONG Xue-feng,WANG Rui-feng,LU Xin-shi(北京林业大学草地资源与生态实验室,北京,100083) |
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| 基金项目： | 国家"十一五"科技支撑计划项目，内蒙古自治区自然科学基金项目 |
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| 摘 要： | 米氏冰草(Agropyron michnoi)是根茎型无性系植物。为了解米氏冰草在沙地生境中的繁殖适应机制,采取单位面积挖掘取样,对呼伦贝尔沙地不同演替阶段的米氏冰草分蘖株和根茎年龄结构进行了调查。结果表明:生长季末期与前期比较,米氏冰草分蘖株数量在流动和半固定沙地均增长了1.5倍,固定沙地无变化;而根茎长度在流动、半固定和固定沙地分别增加5.0,2.1和2.0倍。米氏冰草无性系分蘖株由4个龄级组成,分蘖株数量的年龄结构,在流动沙地均为明显增长型;半固定沙地由增长型转变成稳定型;固定沙地为稳定型。根茎在流动沙地由3个龄级组成,在半固定和固定沙地由4个龄级组成。随着生长季的进程,根茎长度的年龄结构,在流动沙地、半固定沙地和固定沙地均由稳定型变成增长型,增长趋势从大到小排序为:流动沙地>半固定沙地>固定沙地。随着植物群落的次生演替进程,米氏冰草无性系构件的年龄结构呈由增长型向稳定型过渡的趋势。
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| 关 键 词： | 米氏冰草 分蘖株 根茎长度 年龄结构 |
Age structures of Agropyron michnoi in Hulunbeier Sandy Grassland |
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| JIN Xiao-ming,AO Yong-gui,AI Lin,SONG Xue-feng,WANG Rui-feng,LU Xin-shi.Age structures of Agropyron michnoi in Hulunbeier Sandy Grassland[J].Acta Agrestia Sinica,2011,19(3):367-371,387. |
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| Authors: | JIN Xiao-ming AO Yong-gui AI Lin SONG Xue-feng WANG Rui-feng LU Xin-shi |
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| Institution: | JIN Xiao-ming1,2,AO Yong-gui3,AI Lin1,SONG Xue-feng1,WANG Rui-feng1,LU Xin-shi1*(1.Laboratory of grassland resources and ecology,Forestry College of Beijing Forestry University,Beijing,100083,China,2.Hulunbeier College of Inner Mongolia,Hulunbeier,Inner Mongolia 021008,3.Water resources allocation administration of Hulun lake,China) |
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| Abstract: | Agropyron michnoi samples were collected from three different ecological successions to investigate the structures of tillers and rhizomes regarding their propagating mechanism.Results show that the number of tillers growing in shifting sand land and half-stabilized sand land were increased 1.5 times at the end of growing season more than at the early season,whereas there is no change in stabilized sandy land.Meanwhile,rhizome length increased 2.7 times,1.3 times and 1.4 times in each land type,respectively... |
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| Keywords: | Agropyron michnoi Tiller Length of rhizome Age structure |
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