小陇山锐齿栎天然林的树种多样性和结构特征  

Tree Species Diversity and Structure Characteristics of Quercus aliena var. acuteserrata Natural Forest on Xiaolongshan

作　　者：赵中华[1] 惠刚盈[1] 袁士云 刘文桢 

机构地区：[1]中国林业科学研究院林业研究所,国家林业局林木培育重点实验室,北京100091 [2]甘肃省小陇山林业实验局,甘肃天水741020

出　　处：《林业科学研究》2008年第5期605-610,共6页Forest Research

基　　金：天然林经营与恢复技术推广(2008-7)

摘　　要：运用林分结构参数混交度、角尺度、大小比数、直径分布、林层数和物种多样性指标,对小陇山百花林场王安沟经营区锐齿栎天然林样地的群落结构特征进行了研究。结果表明:锐齿栎天然林群落的树种组成十分丰富,树种多样性较高,群落中具有构成当地森林群落的主要树种,结构特征为复层异龄林;在水平结构方面群落中,林木个体分布的角尺度均值为0.489,林分内林木整体分布格局属随机分布;群落的树种隔离程度较高,平均混交度为0.598,处于强度和极强度混交的林木比例高达78.6%;群落中树种以胸径作为比较指标的林木个体的优势排列顺序为:白桦>湖北花楸>漆树>锐齿栎>三桠乌药>华山松>少脉椴>鹅耳枥>青榨槭>膀胱果;在垂直结构方面,群落的平均林层数为2.3层,垂直结构复杂,分化明显。The paper used spatial structure parameters of the angle index, mingling, neighborhood comparison and a high tree species diversity and its tree species composition was abundant. Besides many common tree species, there are also some rare tree species in the community; its diameter distribution demonstrated the typical uneven- aged forest feature and the pattern of horizontal distribution was random, the angle index value was 0.489 ; the tree species segregation was higher and the average value of mingIing ng was 0. 598. In the community,about 78.6% trees＇ value was 0.75 or 1; the neighborhood comparison order was Betula platyphylla 〉 Sorbus hupehensis 〉 Toxicodendron verniciflum 〉 Quercus aliena var. acuteserrata 〉 Lindera obtusiloba 〉 Pinus armandi 〉 Tilia paucicostata 〉 Carpinus turczaninowii 〉 Acer davidii 〉 Staphylea holocarpa taking the dbh as the comparison indictor; in vertical structure the community average layer number was 2.3 and it was obvious differentiated.

关 键 词：锐齿栎 天然林 树种多样性 结构特征 小陇山 

分 类 号：S792.18[农业科学—林木遗传育种]