更新方式对黄山松幼林群落结构与生长的影响

Effects of Regeneration Patterns on the Community Structure and the Growth of Pinus taiwanensis Young Forest

在浙江省四明山,采取人工更新和自然更新相结合的更新方式,以自然更新方式为对照,研究不同更新方式对黄山松幼林群落结构和更新生长的影响。结果表明:采用人工更新和自然更新相结合的方式更新6 a后,黄山松群落结构发育较为完整,主要树种高度和蓄积量生长较快,阔叶树种蓄积量增长了17倍,最大胸径达到了14.1 cm,常绿阔叶树种木荷发展成为优势树种,相对优势度达到16.8%,基本形成发展型的松阔混交林;黄山松胸径级频率分布形状分别呈现单峰型,黄山松将通过径向生长维持其群落优势种的地位。

This paper determined the difference between the community structure and regeneration growth of young Pinus taiwanensis forest by manual regeneration and natural regeneration combined pattern in Siming Mountain, Zhejiang Province.The results showed that：after 6 years＇artificial and natural regenerations, the community structure of Pinus taiwanensis forest was fully developed, the main tree species grew fast in height and volume.It was 17 times higher than the former volume of broad-leaved species, and the max DBH increased to14.1cm.As a species of evergreen broad-leaved forest, Schima superba had became a dominant species in the com-munity with relative dominance reached to 16.8%,and the former forest had changed to be a mixed Pinus Taiwanensis with broad-leaved forest.The DBH size class frequency distribution of Pinus taiwanensis was Unimodal type, and it would be a long-lived domi-nant species in the community with stems regeneration.