论文部分内容阅读
对大兴安岭林区不同地区和林型的天然更新特点及采育方式进行了研究探讨。结果表明:兴安落叶松(Larix gmelinii)的天然更新能力很强,具有大量结实和抵抗不良环境的能力,更新的好坏在很大程度上受其生态环境的制约。采伐迹地的天然更新特点是以伐前更新为主,阔叶树比重增多,幼树分布不均匀,需人工补植。现行的“一次采育伐”是不合理的,有条件的地方应适当加大等带间隔皆伐的比重,在迹地上人工更新,在依靠天然更新的伐区应以二次渐伐为主。优先发展人工更新,以人工更新和促进天然更新,二者结合的原则恢复森林是适合大兴安岭林区具体情况的。
The natural renewal characteristics and harvesting styles of different regions and forest types in the Greater Xing’an Mountains were studied. The results showed that Larix gmelinii had a strong ability of natural regeneration, had a lot of strong and resistant to bad environment, and its regeneration was largely controlled by its ecological environment. The natural regeneration characteristics of the deforestation land is mainly reforestation, the proportion of broad-leaved trees increases, the saplings are unevenly distributed, and artificial replanting is needed. The current “one harvesting” is unreasonable. Where there are conditions, the proportion of clear cutting with intervals should be appropriately increased and man-made renewal should be made on the track. In the cutting area relying on natural renewal, the secondary graduation should be the main one . Giving priority to the development of artificial regeneration, artificial regeneration and promotion of natural regeneration. The principle of combining the two is in line with the specific conditions in the Greater Xing’an Mountains.