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›› 1993, Vol. 29 ›› Issue (4): 298-306.

• 论文及研究报告 • 上一篇    下一篇

兴安落叶松落叶量和幼苗发生动态的研究

徐化成 杜亚娟   

  1. 北京林业大学,北京100083;黄河水利委员会,郑州450003
  • 收稿日期:1992-07-23 修回日期:1900-01-01 出版日期:1993-07-25 发布日期:1993-07-25

AMOUNT OF FALLING SEED AND SEEDLING OCCURRENCE DYNAMICS IN PRIMITIVE LARIX GMELINI FOREST

Xu Huacheng,Du Yajuan   

  1. Beijing Forestry University, Beijiag 100083;The Yellow River Water Resources Conservancy Committee,Zhengzhou 450003
  • Received:1992-07-23 Revised:1900-01-01 Online:1993-07-25 Published:1993-07-25

摘要: 采用野外试验的方法,研究了兴安落叶松原始老龄林下兴安落叶松的更新条件。在所研究的四种林型的兴安落叶松原始老龄林之间,更新差别表现在下种、发芽和存活三方面。种子年时,老龄林下种量每平方米达到300-1000粒,各林型落种量从大到小的顺序为:赤杨落叶松林→丛桦落叶松林→草类落叶松林→杜香落叶松林。一年中的幼苗发生过程可分为四个时期,种子萌发主要在6月,幼苗死亡主要在7月,而8月份幼苗种群变化较小。从有利于落叶松种子萌发和幼苗存活的方面来说,各林型的顺序是:丛桦落叶松林>杜香落叶松林>赤杨落叶松林>草类落叶松林。这个顺序主要取决于土壤表层的湿度,即土壤湿度越大,发芽数和存活数越多。

关键词: 安落叶松, 林型, 落种量, 幼苗发生动态

Abstract: With field experiment method, the regeneration conditions of Larix gmelini in primitive old-growth forest are studied. In mast year, the falling seed in old-growth forest amounts to 300-1000 seeds/m2, the rank of differentforest types is listed as follows Ass. Alnus mandshurica,L. gmelinii>Ass.Betula fruticosa, L.gmelini > Ass. Herbage,L. gmelinii>Ass. Ledum palustre,L. gmelini. The emergence of seedling occurs mainly in June,the death predo-minately in July. In August the seeding amount has little change. Theseedling survive shows following sequencs: Ass. Betula fruticosa, L. gmelini>Ass. Ledum palustre, L. gmelini>Ass. Alnus mandshurica, L. gmelini >Ass. Herbage, L. gmelini. This order is mainly determined by soil surefacemoisture. If soil moisture is higher, the seedling of L. gmelini occurs moreabundantly.

Key words: Larix gmelini, Forest type, Amount of falling seed, Seedling occurrence dynamics