不同龄组麻栎林空间结构分析  

Analysis of Spatial Structure of Quercus acutissima Forest in Different Age Groups

作　　者：逄晨 崔君滕 宋文倩 王琦 彭建 徐晓艺 PANG Chen;CUI Junteng;SONG Wenqian;WANG Qi;PENG Jian;XU Xiaoyi(Forestry Survey&Design Institute of Qingdao,Qingdao Shandong 266100)

机构地区：[1]青岛林业调查规划设计院有限公司,山东青岛266100

出　　处：《山东林业科技》2024年第6期18-25,共8页Journal of Shandong Forestry Science and Technology

摘　　要：以青岛市即墨区四舍山不同龄组麻栎林为研究对象,根据实地踏查数据得到林分空间结构,分龄组、树种计算了混交度、大小比数、聚集指数、竞争指数和空间密度指数。结果表明:各个龄组的混交度低在(0.15~0.24)之间,大小比数均在0.50左右,聚集指数在0.43~0.72之间,均为聚集分布,竞争指数显示中龄林(268.64)和幼龄林(223.88)的竞争比近成熟林(100.65)高,空间密度指数在0.76~0.83之间,均为聚集分布;不同树种之间,混交度、大小比数和竞争指数差异明显,麻栎混交度最低为0.12,赤松、臭椿、黄栌混交度最高为1.00,黄栌大小比数为0.86最高,其次为臭椿为0.8,其余树种均在0.50左右,麻栎竞争指数最高为189.74,第二为刺槐67.56,其余树种竞争指数不超过10,空间密度指数差异不明显。林分内竞争大、混交度和物种多样性低,应采取抚育措施优化林分空间结构,提高林分稳定性和林分质量。The study focused on the spatial structure of Quercus acutissima forests in different age groups in the Sishe Mountain area of Jimo District,Qingdao.Field survey data was used to calculate the mingling,neighborhood comparsion,aggregation index,competition index,and spatial density index for different age groups and tree species.The results showed that the mingling of all age groups was low(0.15-0.24)and the neighborhood comparsion was around 0.50.The aggregation index ranged from 0.43 to 0.72,indicating a clustered distribution.The competition index was higher for middle-aged(268.64)and young(223.88)stands compared to mature stands(100.65).The spatial density index ranged from 0.76 to 0.83,also indicating a clustered distribution.There were significant differences in mingling,neighborhood comparsion,and competition index among different tree species.Q.acutissima had the lowest mingling(0.12),while Pinus tabulaeformis,Toona sinensis,and Celtis sinensis had the highest mingling(1.00).The neighborhood comparsion was highest for Celtis sinensis(0.86),followed by Toona sinensis(0.80),and the other tree species were around 0.50.The competition index was highest for Q.acutissima(189.74),followed by Robinia pseudoacacia(67.56),and the competition index for other tree species was no more than 10.There was no significant difference in spatial density index among different tree species.The results suggest that the stands have high competition and low species diversity,and measures should be taken to optimize the spatial structure of the stands to improve their stability and quality.

关 键 词：麻栎林 林分空间结构 森林经营 

分 类 号：S792.181[农业科学—林木遗传育种]