| 放牧对冷蒿繁殖特性的影响 |
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| 引用本文： | 祁永,杜丽霞,韩建国. 放牧对冷蒿繁殖特性的影响[J]. 草地学报, 2007, 15(2): 168-172 |
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| 作者姓名： | 祁永 杜丽霞 韩建国 |
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| 作者单位： | 1. 中国农业大学动物科学技术学院,北京,100094
2. 内蒙古农业大学生态环境学院,内蒙古,010019 |
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| 摘 要： | 重度放牧对冷蒿(Artemisia frigida)的有性生殖具有严重的阻碍作用,严重影响其有性生殖;冷蒿生殖枝分化率、生殖枝花序数、种子产量、种子成熟度和发芽率之间在同一牧压下表现并不一致,在不同牧压下存在一定的平衡关系;放牧强度起调节作用是冷蒿对放牧的适应机制.
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| 关 键 词： | 冷蒿 有性生殖 无性繁殖 荒漠草原 放牧强度 冷蒿 繁殖特性 影响 Inner Mongolia Steppe Desert Population Characteristic Reproduction Grazing 适应机制 调节作用 平衡关系 存在 表现 牧压 发芽率 种子成熟度 种子产量 |
| 文章编号： | 1007-0435（2007）02-0168-05 |
| 收稿时间： | 2005-10-13 |
| 修稿时间： | 2006-12-20 |
Influence of Grazing on the Reproduction Characteristic of Fringed Sagebrush Population in the Desert Steppe of Inner Mongolia |
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| QI Yong,DU Li-xia,HAN Jian-guo. Influence of Grazing on the Reproduction Characteristic of Fringed Sagebrush Population in the Desert Steppe of Inner Mongolia[J]. Acta Agrestia Sinica, 2007, 15(2): 168-172 |
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| Authors: | QI Yong DU Li-xia HAN Jian-guo |
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| Affiliation: | 1. College of Animal Science and Technology, China Agriculture University, Beijing 100094, China ; 2. College of Ecology and Environment Science, Inner Mongolia Agriculture University, Hohhot, Inner Mongolia Autonomous Region 010018,China |
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| Abstract: | The sexual reproduction of fringed sagebrush(Artemisia frigida) is curtailed by grazing pressure,more particularly,heavy grazing conditions.However,fringed sagebrush reproduction characteristics change with different extents of grazing pressure.The differentiation proportion of reproductive tillers,inflorescence number per reproductive tiller,seed yields,and seed maturity degree of fringed sagebrush vary,even though the plants are under similar grazing pressure.Fringed sagebrush boasts an adaptive mechanism to adjust to the different extents of grazing pressure. |
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| Keywords: | Artemisia frigida Sexual reproduction Vegetative propagation Desert steppe |
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