| 沙质草地裸斑植被恢复:种子传播和种子形态研究 |
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| 引用本文： | 邓徐.沙质草地裸斑植被恢复:种子传播和种子形态研究[J].安徽农业科学,2011,39(22):13344-13347,13371. |
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| 作者姓名： | 邓徐 |
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| 作者单位： | 中国科学院沈阳应用生态研究所,辽宁沈阳110016;中国科学院研究生院,北京100039 |
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| 摘 要： | 荒漠化导致草地中形成大量裸斑,笔者通过监测传播到裸斑的种子,分析种子传播在裸斑的时空分布,探索种子形态、传播媒介对种子传播的影响。结果表明,传播到裸斑的种子为415～991粒/（m2.a）;传播种子的分布具有季节差异,70%的种子集中分布在59、、10月,6、78、1、1月一般低于150粒/m2;传播种子分布无空间差异,在裸斑不同方位和圈层呈均衡分布;种子形状和重量是影响种子传播到裸斑的重要因素。种子传播的时间分布格局、种子形态影响种子侵入裸斑,进而影响其植被自然恢复。
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| 关 键 词： | 裸斑 种子传播 种子形状 种子重量 植被恢复 |
Vegetation Restoration of Bare Patches in Degraded Grassland:Seed Dispersal and Seed Morphology |
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| DENG Xu.Vegetation Restoration of Bare Patches in Degraded Grassland:Seed Dispersal and Seed Morphology[J].Journal of Anhui Agricultural Sciences,2011,39(22):13344-13347,13371. |
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| Authors: | DENG Xu |
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| Institution: | DENG Xu(Institute of Applied Ecology,Chinese Academy of Sciences,Shenyang,Liaoning 110016) |
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| Abstract: | Bare patches are frequently found in the desertification grassland.Dispersed seeds in bare patches and plant species around bare patches were investigated;then we analyzed the spatio-temporal pattern of dispersed seeds in bare patches,and explored how seed morphology,dispersal agent,and the distribution and abundance of seed sources affect seed dispersal.The results showed that dispersed seeds were 415-991 grains/m2·a1;70% of them were distributed in May,September and October,and they were generally less than 150 grains m2 in June,July,August and November.There was no difference in the spatial distribution of dispersed seeds.Seed mass and seed shape were the main factors.These results implicated that temporal patterns of dispersed seeds,and seed morphology affected seed dispersal in bare patches,thus affected their revegetation. |
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| Keywords: | Bare patch Seed dispersal Seed shape Seed mass Vegetation restoration |
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