【摘要】 通过对水曲柳(Fraxinus mandshurica)在红松(Pinus koraiensis)、樟子松(Pinus sylvestris Var.mongolica)、落叶松(Larix gmelini)人工林下的天然更新状况的调查分析,对其种群在人工针叶群落下发生发展特点做了比较详细的讨论。(1)在土壤水分条件比较适中的人工针叶群落中,只要在70m范围内有水曲柳种源存在,就能发生水曲柳天然更新种群。(2)现实人工针叶群落中天然发生的水曲柳种群年龄结构、空间结构(包括垂直分层和水平分布)及高生长状况都比较合理,能正常生长发育,进入主林层,与上层林木共同构成人工天然针阔混交林。此外,还对人工针叶群落中水曲柳天然更新种群生态位做了分析和讨论。更多还原

【Abstract】 Through investigating and analyzing on natural regeneration conditions of manchurian ash (Fraxinus mandshurica) in the plantation of korean pine(Pinus koraiensis), mongolian scots pine (Pinus sylvestris var mongolica) and dahurian larch (Larix gmelini), the happening and developing characters of manchurian ash population are studied as follows: (1) The manchurian ash population can occur ia the artificial coniferous communities where there are seed source trees in the extent of 70m apart from plantation edge and sufficient soil moisture in the plantation. (2) The age and space distribution patterns and tree height increment of the manchurian ash population in the artificial coniferous communities are reasonable and normally growing, and it can go up to the canopy as well as forms natural and artificial mixed broadleaf-coniferous forest community. The niche of manchurian ash natural regeneration population in the artificial coniferous communities is also discussed.更多还原