次生阔叶林更新方式对林分生长和演替的影响研究

The growth performance and succession of sub-natural broadleaved forest affected by regeneration patterns

对光泽县九龙坑天然次生阔叶林天然和人促更新方式下的林分恢复进行调查,比较这2种更新方式群落的生长、物种多样性、生态优势度和重要值。结果表明:不同更新方式林分的生长、物种多样性、生态优势度和重要值均存在明显差异。人促更新17 a后林分的平均胸径、树高及蓄积量分别是天然更新林分的1.8倍、1.6倍和2倍。采用人工促进天然更新能加速群落的演替进程,且在材种和材质方面达到经营的预期目标,进而提出将次生阔叶林改造培育成工业原料林的技术措施,并解决了合理密度设定这一关键改造技术。

The natural and artificial promoting regeneration patterns were used to study the recovery performance of Jiulongkeng sub-natural broadleaved forest in Guangze County in the aspects of community development, species biodiversity, and ecological dominant degree and key value. The results showed that there were significant difference among different regeneration patterns in community development, species biodiversity, and ecological dominant degree and key value. The artificial promoting regeneration could accelerate the course of succession. Moreover, it also had reached the anticipated object of the manager in both wood species and quality. Meanwhile, it submitted the technique for transforming sub-natural broadleaved forests into industrial material forests. The reasonable density for plantation, which was the key for transforming the forests, was also involved in this article.