木荷防火林带群落及其不同立地生长特性研究

Investigation on Schima Superba Fire-Resistant Forest Belts Communities and Its Growth Features in Different Sites

对千岛湖地区不同林龄和立地条件的木荷防火林带的群落与生长特性的调查研究表明：随着木荷防火林带林分年龄的增加．易燃的蕨类逐渐减少，低矮耐阴的小草本和灌木树种甚至目的树种渐渐增多．但防火林带依然是单层优势群落．群落垂直结构较差；不同的立地类型对生物防火林带树种的生长影响较大，随着土层厚度降低、坡度加大、土壤石砾含量增加，防火林带各树种的高生长和径生长减少；木荷速生期出现在5～10年生时，年平均材积生长量达4m^3·hm^-2以上；木荷树冠高大，叶子浓密、革质、含水率高达69％。木荷适宜在千岛湖区生长，可用于营造防火与用材两用林。

The community and growth characteristics of Schima Superba fire-resistant forest belts with different forest age and site conditions in Qiandao Lake. With the increasing of the stand age of fire-resistant forest belts, flammable ferns, gather of low and shade-enduring small herbages and shrubs even target tree species droped off, different site type on biology fire-resistant forest belt species increased, but the fire-resistant forest belts were monolayer dominance community, the community uprightness structure was bad; the growth effects of different site types on biological fire-resistant forest belt tree species were big, with the decrease of soil layer thickness, increase of gradient, the gravel content in soil increased, highness and diameter growing of fire-resistant forest belt species reduced, Schima superba rapid growing period was during 5-10 a, the annual average volume growth reached 4 m^3. hm^-2 and more; its crown was tall and big, leafage was dense, it was of leathery quality, rate of containing water reached 69 %. S, superba adapted to grow in Qiandao Lake District. Meanwhile, it might be used as fire-resistant and timber forests.