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应用生态学报 ›› 1995, Vol. 6 ›› Issue (2): 113-118.

• 研究论文 •    下一篇

大兴安岭北部原始老龄林内兴安落叶松幼苗种群的生命统计研究

班勇1, 徐化成2   

  1. 1. 中国林业科学院林业研究所, 北京 100091;
    2. 北京林业大学资源环境学院, 北京 100083
  • 收稿日期:1994-03-15 修回日期:1994-08-15 出版日期:1995-04-25 发布日期:1995-04-25
  • 基金资助:

    国家自然科学基金

Demography of Larix gmclini seedling population in natural old-growth forests of north Daxinganling Mts

Ban Yong1, Xu Huacheng2   

  1. 1. Forest Research Iinstitute, Chinese Academy of Forestry, Beijing 100091;
    2. Beijing Forestry University, Beijing 100083
  • Received:1994-03-15 Revised:1994-08-15 Online:1995-04-25 Published:1995-04-25

摘要: 天然落叶松老龄林每1个种子年后第2年,林地表面即会出现大量天然幼苗100-270株·m-2.幼苗发生时间集中,绝大多数在6月底。赤杨落叶松林幼苗发生较丛桦落叶松林和杜香落叶松林的迟。幼苗死亡时期也集中,主要在幼苗发生后的15天内。其间杜香落叶松林的幼苗死亡率为48%,3年内97%;丛桦落叶松林为29%和66%;赤杨落叶松林为33%和69%.7月以后发生的幼苗存活率很低,早期发生的幼苗占优势,死亡率低。丛桦落叶松林和杜香落叶松林幼苗的早期优势显着,尤其是杜香落叶松林。幼苗存活的年际变化很大,落叶松幼苗数量丛桦落叶松林>赤杨落叶松林>杜香落叶松林。

关键词: 兴安落叶松, 生命统计, 幼苗种群, 老龄林, 大兴安岭

Abstract: Demography of Larix gmelini seedling population in natural old-growth forest of northDaxinganling Mts.show that after each fructification year, a great number of larchseedlings are emerged mainly in next June, and part of them died within a period of 15days after emergence.The emergence of L.gmelini seedlings in old-growth L.gmelini Alnus mandshurica forest is later than in L.gmelini-Betula fruticosa and L.gmeliniLedum palustre forests.The seedlings have a mortality of 48% within15 days and of 97% in3 years for L.gmelini-L.palustre forest, 29% and 66% for L.gmelini-B.fruticosa forest and 33% and 69% for L.gmelini-A.mandshurica forest.The seedlings emerged after July have a low survival rate, and appear a prominent advantage of early establishment in L.gmelini-B.fruticosa and L.gmelini-A.mandshurica forests, especially inthe latter.The annual survival rate of seedlings of different forests varies greatly, and decreases in order of L.gmelini-B.fruticosa, L.gmelini-A.mandshurica and L.gmelini-L.palustre.

Key words: Larix gmelini, Demography, Seedling population, Old-growth forest, Daxinganling Mts