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SCI论文全文(PDF文件) |
鼎湖山森林土壤种子库动态研究 |
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| 出 版 社：生态环境 |
| 发表时间：2005 |
| 台 站：
鼎湖山森林生态系统定位研究站
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| 作 者：魏识广，李林，黄忠良，彭闪江，史军辉 |
| 点 击 率：4995 |
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| 关 键 字：鼎湖山；土壤种子库；多样性格局；生活型组成 |
| 摘 要：在鼎湖山森林季风常绿阔叶林、针阔混交林、马尾松林林型中研究土壤种子库储量、多样性格局和生活型等。通过分两层取土样，风干土壤样品，对样品进行筛选，过滤出种子。并进行种子分类鉴定，用土芯实验法检测土壤种子库的组成。结果表明，在4 个取样地点的种子库中，上层种子的Shannon 多样性指数和Simpson 指数都明显高于下层。草本植物不仅是种类还是数量上都是这三种林型土壤种子库的主体成分，特别是在针叶林中，种子储量占有十分显著的优势地位，随着演替年龄的增长，草本植物在种子库储量中占的比例有所减少。另外，种子库中优势成分与取样地点地面植被相应层次的优势种存在较大差异，说明植物群落地上部分的发育与其它地下部分的土壤种子库的发育具有明显的不同步性，这一结果表明土壤种子库的内在潜力对森林更新及植物群落演替动态产生了重要影响。 |
| 关 键 字(英文)：Dinghushan; soil seed bank; diversity pattern; life-form components |
| 摘 要(英文)：The soils were chosen from monsoon evergreen broad-leaved, mixed coniferous and broad-leaf forest, Pinus massoniana forest in Dinghushan, and the reserves, component, diversity pattern and life form of the seed bank of forest soil were studied. First,the soil was chosen from two levels. Then it was air-dried. The seeds were sifted by select soil samples. Finally, the seeds were classified
and identified, and the component of the soil seed bank was inspected by the soil core experimentation. The result showed that,
in four sampling spots, the Shannon and Simpson index of the topper seed are obviously higher than the subsoil. Herbage is the principal
part of the three forests both at its variety and number. Especially in needle forest, the reserves of seed have distinct predominance.
The proportion of herbage seed in the bank are reduced, with the increasing of succession age. Otherwise, the predominant
components in the seed bank are different from the subaerial predominant vegetation at correspond layer. The result showed that the growth of subaerial parts of plant community isn’t obviously isochronous with the seed bank. So the inherent potential of soil seed bank has important influence on the regeneration of forest and the dynamic succession of plant community. |
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 鼎湖山森林土壤种子库动态研究_2005 生态环境 魏识广.pdf |
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