北京山区栓皮栎水源涵养林空间结构特征研究.PDF

18 3 Vol. 18, No. 3 2011 6 Research of Soil and Wat er Conservation Jun. , 2011 赵 阳, 余新晓, 宋思铭, 张艺, 杨芝歌, 王贺年, 邓文平 ( , , 100083) : , , : ( 1) 16 , , ; ( 2) 0. 32, ; (3) , 67% 51% 71% 57% , ; (4) ( 30 m) , , , , : ; ; ; ; :S718. 5; S727.21 :A : 1005 3409( 2011) 03 0041 07 Spati al Structure Characteristic of Quercus variabilis Forest in Xishan Mountain of Beij ing ZHAO Yang, YU Xin xiao, SONG Si ming, ZHANG Yi, YANG Zhi ge, WANG He nian, DENG Wen ping (K ey L ab of Soil and Water Conservation Desertif ication Combating of Ministry of E ducation, College of Soil and Water Conservation, Beij ing orestry University , Beij ing 100083, China) Abstract: This study investigated the application of terrestrial laser scanning for providing quantitative forest parameters at the plot level by using multi stop scanning method for determining stand parameters such as the tree height, basal area and other parameters. T his paper described the spatial structural characteristics of one plot level stand of Quercus v ariabilis forests in Xishan Mountain of Beijing using mingling degree, neigh borhood comparison and the method of point pattern analysis. T he results showed that there were sixteen species in arbor layer of Quercus v ariabilis forests and the stand has a vertical structure showing a typical structure of the complex character. The average mingling degree of the whole stand was 0. 32, suggesting the low mingling degree of stands. In the spatial structural units, Quercus variabilis, Pinus tabulaef ormis, Quercus dentata and Robinia p seudoacacia were mainly of dominant, sub dominant and intermediate trees, accounting