福建梁野山天然钩锥老龄林特征研究

Study on the Characteristics of Old Natural Forest of Castanopsis tibetana in Liangyeshan National Nature Reserve of Fujian Province

采用带状样地法进行群落学调查,研究福建梁野山国家级自然保护区天然钩锥老龄林特征。结果表明:乔木层由21种树种组成,钩锥占绝对优势,重要值和蓄积量分别占全林的36.2%和71.4%。乔木层物种丰富度S、多样性指数SW、均匀度E和生态优势度ED分别为21,3.70,0.50和0.105;第Ⅰ、Ⅱ亚层物种丰富度S分别为4和21,多样性指数SW分别为1.11和3.91,均匀度E分别为0.20和0.56,生态优势度ED分别为0.571和0.041。灌木层物种丰富度S、多样性指数SW、均匀度E和生态优势度ED分别为44,4.63,0.61和0.060。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29.6 cm,15.7 m,790株/hm^(2),395.5 m^(3)/hm^(2);第Ⅰ、Ⅱ亚层平均胸径分别为50.0,16.4 cm,平均树高分别为18.1,11.4 m,单位面积株数分别为214,576株/hm^(2),单位面积蓄积分别为329.4,66.1 m^(3)/hm^(2)。

The characteristics of old natural forest of Castanopsis tibetana in Liangyeshan National Nature Reserve of Fujian Province were studied by phytocoenology investigation in the method of temporary sample strip plot.The results showed that the stand was composed of 21 tree species in tree layer.The stand dominant species was Castanopsis tibetana of which important value and growing stock in whole stand were 36.2%and 71.4%respectively.The species richness(R),Shannon-Wiener index(SW),evenness(E)and ecological dominance(ED)in tree layer were 21,3.70,0.50 and 0.105 respectively,and they were 4,1.11,0.20 and 0.571 respectively in tree sub-layerⅠ,and 21,3.91,0.56 and 0.041 respectively in tree sub-layerⅡ.The species richness(R),Shannon-Wiener index(SW),evenness(E)and ecological dominance(ED)in shrub layer were 44,4.63,0.61 and 0.060 respectively.The stand average DBH,height,density and growing stock were 29.6 cm,15.7 m,790 N/hm^(2) and 395.5 m^(3)/hm^(2) respectively,and they were 50.0 cm,18.1 m,214 N/hm^(2) and 329.4 m^(3)/hm^(2) respectively in tree sub-layerⅠ,and 16.4 cm,11.4 m,576 N/hm^(2) and 66.1 m^(3)/hm^(2) respectively in tree sub-layerⅡ.