| 科尔沁沙地沙丘演替过程的土壤种子库特征 |
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| 引用本文： | 李雪华,韩士杰,宗文君,李晓兰,蒋德明.科尔沁沙地沙丘演替过程的土壤种子库特征[J].北京林业大学学报,2007,29(2):66-69. |
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| 作者姓名： | 李雪华 韩士杰 宗文君 李晓兰 蒋德明 |
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| 作者单位： | 1.1 辽宁省杨树研究所2 中国林业科学研究院林业研究所 3 北京林业大学林木花卉遗传育种教育部重点实验室 |
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| 基金项目： | 国家科技支撑计划重大项目
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林业部资助项目 |
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| 摘 要： | 该文研究了科尔沁沙地沙丘演替阶段（流动沙丘 半流动沙丘半固定沙丘 固定沙丘）的土壤种子库特征. 土壤种子库物种组成和种子密度均以一年生植物为主. 流动和半流动沙丘土壤种子库密度约为90和364粒/m2，半固定和固定沙丘种子密度显著增加到723和8 880粒/m2 沙丘演替阶段种子密度的时间动态和土壤种子垂直分布特征分析结果表明: 流动半流动沙丘无显著差异(P0.05), 固定半固定沙丘则有显著差异(P≤0.002); 固定半固定沙丘的植物种子表现为持久土壤种子库类型Ⅲa, 并且随土壤深度增加，土壤种子密度显著下降. 沙丘演替阶段土壤种子库的种子密度与植物在地上植被中出现的频度具有显著相关性，二者相关系数为0.568
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| 关 键 词： | 科尔沁沙地 沙丘演替 种子库 种子密度 一年生植物 |
| 文章编号： | 1000-1522（2007）02-0066-04 |
| 收稿时间： | 1900-01-01 |
| 修稿时间： | 2005-12-20 |
Characteristics of soil seed banks of sand dune succession process in Horqin Sandy Land |
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| LI Xue-hua,HAN Shi-jie,ZONG Wen-jun,LI Xiao-lan,JIANG De-ming.Characteristics of soil seed banks of sand dune succession process in Horqin Sandy Land[J].Journal of Beijing Forestry University,2007,29(2):66-69. |
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| Authors: | LI Xue-hua HAN Shi-jie ZONG Wen-jun LI Xiao-lan JIANG De-ming |
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| Institution: | 1 .Institute of Applied Ecology, Chinese Academy of Sciences, Shenyang, 110016, P. R. China; 2. Graduate University of Chinese Academy of Sciences, Beijing, 100049, P. R. China. |
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| Abstract: | Characteristics of soil seed banks of sand dune succession in Horqin Sandy Land were studied. The annual plants dominated the species and soil seed density during sand dune succession process. Soil seed density of mobile and semi_mobile sand dune was about 90 and 364 grain/m2，and that of semi_fixed and fixed sand dune increased to 723 and 8 880 grain/m2 significantly. Analyzing the temporal dynamics and vertical distribution of soil seed density in sand dune succession process, the results were drawn as the following in mobile and semi_mobile sand dune(P>0.05), but was significant in fixed and semi_fixed sand dune(P≤0.002); soil seed bank type of fixed and semi_fixed sand dune was persistent soil seed bank Ⅲa, and the deeper the soil depth was, the fewer the soil density was. Soil seed density in sand dune succession process was correlated with the species frequency significantly, and the correlation coefficient was 0.568 |
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| Keywords: | Horqin Sandy Land sand dune succession seed bank seed density annual plants |
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