阔叶红松原生次生林和杂木次生林中紫椴的生态学特征

该文对长白山林区珍贵用材树种紫椴的生态学特征进行了研究 .结果表明 ,紫椴伐桩产生的萌条数量在 5 0a以后越来越多 ,萌生能力越来越强 .采伐时期对伐桩的萌生能力影响很大 .在春天发叶以前采伐 ,伐桩的萌生能力很大 ;春天发叶以后采伐 ,伐桩的萌生能力不佳 ;秋天落叶以前采伐 ,使第二年萌生能力降低 ;秋天落叶以后的采伐跟春天发叶以前的采伐效果相同 .紫椴萌生条和造林幼树极易分杈 ,原因是多方面的 .主要的原因是高生长速度与低温 ;另一方面 ,当椴树幼苗当年生枝干来不及很好地木质化时 ,一遇寒流 ,则很快干梢 ,这在空旷地人工更新情况下十分常见 .

Ecological characteristics of Tilia amurensis in secondary broad leaved-Korean pine forest community and in secondary mixed species forest community

This paper focuses on the ecological characteristics of Tilia amurensis in the Changbai Mountain forest region. Sprouting ability of stumpage starts to get stronger in individuals after 50 years. Timing of cuttings is very important to consider when focusing on natural regeneration by sprouting. The strongest sprouting was observed when cutting was made in spring before leafing or in autumn after leaf dropping (sprouting took place at next growing season). Tilia amurensis sprouts and planted seedlings are very susceptible to forking. Reasons of this are multiple, but it is mainly resulted from very fast height growth and low temperatures, such as cold dry airflows during a winter time.