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中国农学通报

中国农学通报 ›› 2011, Vol. 27 ›› Issue (19): 74-78.

• 林学 园艺 园林 • 上一篇    下一篇

三江平原毛果苔草无性系种群根茎的年龄结构

邢军会 倪红伟 栗辉   

  • 收稿日期:2011-04-25 修回日期:2011-05-25 出版日期:2011-08-05 发布日期:2011-08-05
  • 基金资助:

    黑龙江省杰出青年基金“三江平原湿地植被复杂适应系统（CAS）的生态学基础”;黑龙江省财政厅“基本科研业务费专项”基金“三江平原毛果苔草无性系种群年龄结构的研究

Age Structure Analysis of Rhizomes in a Clonal Population of Carex lasiocarpa on the Sanjiang Plain of China

  • Received:2011-04-25 Revised:2011-05-25 Online:2011-08-05 Published:2011-08-05

PDF (PC)

812

摘要：

为了揭示毛果苔草无性系种群营养繁殖中的某些策略，为湿地植物的保护和保育工作提供科学依据，笔者利用分蘖节营养繁殖世代数，对毛果苔草根茎龄级进行判断和划分，统计毛果苔草根茎长度和生物量的年龄结构，并分析各龄级根茎数量特征的变化规律。结果表明，毛果苔草无性系种群根茎的最大存活年龄为9龄；根茎的长度、生物量皆以2~6龄级为主，结构较稳定；生长季内，1、9龄级变化较大：1龄级根茎在果期开始出现，并迅速增加；9龄级根茎在生长季末迅速消失；单位长度根茎的干物质贮量以2~5龄级为主，在4龄级有最高值；生长季后期是毛果苔草根茎营养物质积累的重要时期。1龄根茎的快速生长有利于种群快速、充分地占据或扩展生长空间。

关键词: 植物激素, 植物激素, 附子, 生物碱, 含量

Abstract:

In order to reveal some strategies in vegetative propagation of Carex lasiocarpa clonal popuation, and to provide the scientific basis for the protection and conservation of wetland plants, the rhizomes of C. lasiocarpa were classified into different age classes by propagation generation number of tillering node. The age structure of rhizomes was characterized in terms of length and biomass, and the pattern of quantitative change in rhizome numbers of different ages was analyzed. The results showed that rhizomes of C. lasiocarpa could live to 9 generations at most. As among the age classes, 2-6 years old were superior in the length and biomass of rhizomes. The rhizomes showed a stable age structure. During the growing season, larger changes taken place in 1 age class and 9 age class of rhizomes. 1 age class of rhizomes began to appear in the fruit and then increased rapidly. The 9 age class of rhizome was death in the late growing season. As among the age classes, 2-5 years old were superior in the dry matter storage per unit length, and 4 age class had the highest value of the dry matter storage per unit length. The final stage of the growing season was an important period for nutritional substances accumulation of C. lasiocarpa rhizome population. The rapid growth of 1 age class of rhizomes was advantageous to the population to rapid, adequately occupy or expand to grow space.