高寒退化与未退化草甸土壤下匍匐茎鹅绒萎陵菜的克隆生长特征的比较
Clonal growth of stoloniferous herb Potentilla anserina on degraded and non-degraded alpine meadow soil
查看参考文献19篇
文摘
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通过鹅绒萎陵菜的野外移栽试验,分析了在矮蒿草草甸土壤和退化草甸土壤下该种植物的克隆繁殖特征。结果表明,在母株产生的匍匐茎数量、母株高度和叶片大小在两类不同土壤下没有明显差异,母株叶片数、匍匐茎的粗度、匍匐茎长度以及间隔子的长度有较明显的差异。在退化草甸土壤中母株叶片较多,匍匐茎长度和间隔子长度明显较长,匍匐茎直径也明显较大。在退化草甸环境中,由于土壤养分相对较缺乏,鹅绒萎陵菜可能通过增加母株叶片的数量,尽可能多地积累光合产物,来保证匍匐茎的生长,匍匐茎也以增加粗度和增加长度来尽量增强其觅食能力。鹅绒萎陵菜在生物量投资分配上也表现出一定的差异。与退化草甸土壤环境相比,在未退化草甸土壤中,鹅绒委陵菜克隆母株和分株的生物量均明显偏向地下部分(根系)的投资,以期从土壤中吸收更多的养分,从而最终提高了株的成活率。 |
其他语种文摘
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The clonal growth of Potentilla anserina on degraded and non-degraded Kobresia humilis meadow soil was studied by a transplanting experiment in the field. No significant differences in numbers of stolons, height, and leave size per mother ramet were observed between the two soils , but the numbers of leaves per mother ramet, length and width of stolon, and spacer length were significantly different. There were more leaves per mother ramet, longer stolon and spacer, and wider stolon on degraded soil, where available nutrient was poor than in non-de-graded soil. Under degraded alpine meadow soil condition, the clonal plant species might produce much more photosynthetic product to support stolon growth by the increase of leave numbers per mother ramet, and the longer and wider stolon could intensify the foraging ability of the mother ramet that would benefit to daughter ramet. Both mother and daughter ramet of Potentilla anserina invested much more biomass to their under-ground part (root system) in non-degraded soil to increase the survival rate of daughter ramet. |
来源
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应用生态学报
,2003,14(8):1332-1336 【核心库】
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关键词
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退化土壤
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鹅绒萎陵菜
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地址
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1.
中国科学院西北高原生物研究所, 西宁, 810001
2.
中国科学院植物研究所, 北京, 100093
3.
中国林业科学院森林环境与保护研究所, 北京, 100091
4.
中国科学院地理科学与资源研究所, 北京, 100101
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语种
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中文 |
文献类型
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研究性论文 |
ISSN
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1001-9332 |
学科
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普通生物学 |
基金
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国家973计划
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中国科学院知识创新工程项目
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国家“十五”科技攻关项目
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文献收藏号
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CSCD:1257334
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