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机构地区:[1]贵州大学生命科学学院环境科学,贵阳550025
出 处:《生态科学》2008年第3期186-192,共7页Ecological Science
基 金:贵州省自然科学基金(黔科合J字[2005]2025号);黄土高原土壤侵蚀与旱地农业国家重点实验室基金(10501-161);贵州大学人才基金(2003F00bs002)资助
摘 要:土壤种子库是指存在于土壤表层掉落物和土壤中全部活性种子的总和。土壤种子库是现在植物种群生态学研究中不可缺少的一部分。土壤种子库时期是植物种群生活史的一个重要阶段,有人称之为潜种群阶段,是种群的定居、生存、繁衍和扩散的基础。土壤种子库理论作为群落生态学和恢复生态学的基础理论,是退化生态系统重建的重要组成部分,已成为植物生态学研究的热点问题。随着其发生发展,土壤种子库研究方法更加科学准确,研究内容得到了不间断的更新和补充,研究领域涉及了植物学、遗传学、生态学、杂草科学和农学等各科学。至此,土壤种子库已经形成了相对完善的理论框架,主要包括:1.土壤种子库的研究的沿革;2.土壤种子库的特征3.土壤种子库的动态变化4.土壤种子库的分类问题5.土壤种子库的研究方法6.对植物生态学的贡献。Soil seed bank includes all living seeds existing both in litter and in soil.Investigation of the seed and spore bank has become a recognized and indispensable part of plant ecology now and has been an active research area.The soil seed bank is one of the life history stages of plant populations,which is called subpopulation stage and acts as the base of settling,living,reproducing and spreading of plant populations.The theory of soil seed bank is regarded as the basic theory of community ecology and restoration ecology,an important mechanism for natural regeneration in degraded forest ecosystems,and has become a hot issue in plant ecology.With its development,the methods of soil seed bank research are more scientific and precise;meanwhile the content is updated and supplemented constantly and the fields of research include botany,genetics,ecology,weed science,agronomy and other sciences.Up to now,a comparatively full and complete framework of theory in soil seed bank has been achieved,which can be summarized as following: 1.development and direction of soil seed bank;2.characteristics of the soil seed bank;3.dynamics of soil seed banks;4.classification of soil seed bank;5.methods used in the seed bank research;6.its contribution to plant ecology.
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