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兴安落叶松(Larix gmelinii)自然分布区大兴安岭的立地条件和种子发芽条件的特殊性,导致了兴安落叶松天然更新的特殊性。瘠薄的棕色针叶林土,生长季短、冬季漫长以及土壤表层较厚的死地被物层增加了天然更新的难度。然而兴安落叶松的天然更新效果却是令人满意的。兴安落叶松在母树林冠下更新良好,只是在某些林型如草类落叶松林的成熟林冠下更新不良;而在3—10年的择伐迹地和火烧迹地上平均每公顷有13500株幼树。大兴安岭地区兴安落叶松火烧迹地天然更新良好的奥秘何在?火灾后兴安落叶松的种子发芽条件如何?火灾在这方面的作用是什么?作者从天然更新的关键之一——种子
The natural conditions of Daxing’anling, Larix gmelinii, and the special conditions of seed germination led to the particularity of natural regeneration of Larix gmelinii. Infertile brown coniferous forest soil, short growing seasons, long winters and thicker dead soil on the surface of the soil increase the difficulty of natural regeneration. However, the natural regeneration effect of Larix glabra is satisfactory. Larix gmelinii is well-established under the canopy in the mother tree, but only poorly under the mature canopy of some forest types such as grass-larch forests. On the other hand, there are 13,500 young plants per hectare on the selective and burned sites in 3 to 10 years tree. Daxinganling area Larix Larix fire-burning natural regeneration Good mystery? After the fire Larch Larva seed germination conditions? What is the role of fire in this area? The author from the natural regeneration of one of the key - seeds