| 兴安落叶松落叶量和幼苗发生动态的研究 |
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| 引用本文： | 徐化成,杜亚娟.兴安落叶松落叶量和幼苗发生动态的研究[J].林业科学,1993,29(4):298-306. |
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| 作者姓名： | 徐化成 杜亚娟 |
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| 作者单位： | 北京林业大学 北京100083(徐化成)，黄河水利委员会 郑州450003(杜亚娟) |
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| 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。
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| 关 键 词： | 兴安落叶松 落叶量 幼苗 发生动态 |
AMOUNT OF FALLING SEED AND SEEDLING OCCURRENCE DYNAMICS IN PRIMITIVE LARIX GMELINI FOREST |
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| Xu Huacheng.AMOUNT OF FALLING SEED AND SEEDLING OCCURRENCE DYNAMICS IN PRIMITIVE LARIX GMELINI FOREST[J].Scientia Silvae Sinicae,1993,29(4):298-306. |
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| Authors: | Xu Huacheng |
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| 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/m~2, the rank of differentforest types is listed as follows Ass. Alnus mandshurica,L. gmelini>Ass.Betula fruticosa, L.gmelini > Ass. Herbage, L. gmelini>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. |
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| Keywords: | Larix gmelini Forest type Amount of falling seed Seedling occurrence dynamics |
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