章古台沙地3种不同针叶树种天然更新对比

摘要

通过对章古台沙地樟子松、赤松、油松等3种不同针叶树种天然更新对比试验,结果表明,3种针叶树1年生天然更新强度分别为3 594～5 133、20 300～50 000和8 300～13 900株.hm-2;赤松天然更新的强度好于油松,油松好于樟子松;樟子松天然更新1年生幼苗较难越冬,经覆盖后幼苗越冬成活率达66%;赤松、油松1年生幼苗相对较易越冬,越冬成活率分别为17.20%和20%,经覆盖后幼苗越冬成活率分别为54.94%和51.28%。因此,应采取人工促进措施进行樟子松、赤松、油松天然更新。%Comparative experiments of natural regeneration for Pinus sylvestris var.mongolica,Pinus densiflora Sieb et Zucc.and Pinus tabulaeformis exist on Zhanggutai’s sandyland in Zhangwu county of Liaoning province were conducted.Natural regeneration intensity of one-year-old three conifer species are separately 3 594-5 133,20 300-50 000 ＆ 8 300-13 900 plants·hm-2;the intensity of natural regeneration of Pinus densiflora Sieb et Zucc.is optimal than that of Pinus tabulaeformis;the intensity of natural regeneration of Pinus tabulaeformis is optimal than that of Pinus sylvestris var.mongolica;natural regeneration of one-year-old Pinus sylvestris var.mongolica seedlings are difficult to live through winter.Survival rate of seedlings should increase by 66% after covering.One-year-old seedlings of Pinus densiflora Sieb et Zucc.＆ Pinus tabulaeformis whose overwintering survival rate are 17.20% ＆ 20%,respectively,are relatively easy to live through winter;survival rate of seedlings are 54.94% ＆ 51.28% after covering.Therefore,artificial measures should be taken to promote the natural regeneration of Pinus sylvestris var.mongolica,Pinus densiflora Sieb et Zucc.,Pinus tabulaeformis. 更多