| 不同生境条件下羊草种群无性系和有性生殖特征的比较研究 |
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| 引用本文： | 王仁忠.不同生境条件下羊草种群无性系和有性生殖特征的比较研究[J].应用生态学报,2001,12(3):379-383. |
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| 作者姓名： | 王仁忠 |
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| 作者单位： | 王仁忠（中国科学院植物研究所植被数量生态学开放研究实验室,北京100093） |
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| 基金项目： | 国家自然科学基金项目(39899370)和国家教委跨世纪优秀人才培养计划项目资助. |
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| 摘 要： | 比较研究了东北草原不同生境条件下4个羊草种群无性系和有性生殖数量特征的差异，结果表明，由于各种群所处立地的资源（特别是土壤水分），导致各种群在无性系（包括营养枝和根茎芽密度）和有性生殖（生殖枝密度、生殖技分化率、生殖贡献）等数量特征方面差异显著，尤其在低平原种群与沙的天种群之间最为显著，与沙丘种群相比，低平原种群营养枝平均密度高50％；根茎芽平均密度高30％以上；生殖枝密度平均值高200％以上。
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| 关 键 词： | 生境条件 羊草种群 无性系 有性生殖数量特征 |
| 文章编号： | 1001-9332(2001)03-0379-05 |
| 修稿时间： | 2000年4月21日 |
Comparative study on clonal and sexual reproductive traits of Leymus chinensis populations in different habitats. |
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| WANG Renzhong.Comparative study on clonal and sexual reproductive traits of Leymus chinensis populations in different habitats.[J].Chinese Journal of Applied Ecology,2001,12(3):379-383. |
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| Authors: | WANG Renzhong |
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| Institution: | Laboratory of Quantitative Vegetation Ecology, Institute of Botany, Chinese Academy of Sciences, Beijing 100093. wangrzh@163.net |
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| Abstract: | The variations of clonal and reproductive traits between four Leymus chinensis populations in different habitats were studied on northeast grasslands of China. The results showed that significant differences existed among Leymus chinensis populations in both clone traits (vegetative shoot densities and tiller densities) and sexual reproduction traits (reproductive shoot densities,reproductive shoot differentiation and reproductive effects),primarily due to the habitat heterogeneity of sites,especially the difference in soil moisture.The difference between grassland population and dune population was relatively greater,and the average vegetative shoot density,tiller density and sexual shoot density from grassland population were 50%,30% and 200% greater than those from dune,respectively. |
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| Keywords: | Different habitats Leymus chinensis populations Clonal and sexual reproductive quantitative traits |
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