浙江泰顺米槠天然林特征

以浙江省泰顺县洋溪林场米槠Castanopsis carlesii天然林为研究对象,对其群落学特征和测树学特征进行调查分析.结果表明：乔木层由69种树种组成,米槠和木荷Schima superba占优势,重要值分别为65.04％和49.14％;乔木层可分为第Ⅰ亚层、第Ⅱ亚层和第Ⅲ亚层;乔木层物种丰富度S,多样性指数ISW,均匀度E和生态优势度DE分别为69,4.63,0.76和0.093;各亚层物种丰富度S为33～38,多样性指数Isw为4.36～4.85,均匀度E为0.86～0.93,生态优势度DE为0.032～0.071;林分平均胸径、平均树高、单位面积株数、单位面积蓄积分别为20.77 cm,16.67 m,743株·hm-2,193.80 m3·hm-2.林分直径分布呈倒J型.研究结果对中亚热带天然阔叶米槠林可持续经营技术有借鉴作用.

Characteristics of natural forest of Castanopsis carlesii in Taishun County,Zhejiang Province

The community characteristics and measurement features of natural forest of Castanopsis carlesii in Taishun County,Zhejiang Province were studied in this research.The results indicated that the tree layer consisted of 69 tree species,with Castanopsis carlesii and Schima superba as two dominant species and the importance values of these two species being 65.04 per cent and 49.14 per cent respectively.There were three sublayers in the tree layer,namely,sub-layer Ⅰ,sub-layer Ⅱ and sub-layer Ⅲ.The species richness （S）,Shannon-Wiener index （Isw）,evenness （E） and ecological dominance （DE） of the tree layer were 69,4.63,0.76 and 0.093 respectively.The species richness （S） of the sub-layers ranged between 33-38,Shannon-Wiener index （Isw） between 4.36-4.85,evenness （E） between 0.86-0.93 and ecological dominance （DE） between 0.032-0.071.The average DBH and height,the number of trees per unit area,and unit stock volume of the forest stand were 20.77 cm,16.67 m,743 tree·hm-2 and 193.80 m3·hm-2respectively.Its distribution of DBH was showed as the inverse J type.The results provided references for the sustainable management of the natural broad-leaved Castanopsis carlesii in the mid-subtropical region.