吉林蛟河针阔混交林乔木幼苗组成及其密度格局影响因素

孟令君,姚杰,秦江环,范春雨,张春雨,赵秀海

Drivers of composition and density pattern of tree seedlings in a secondary mixed conifer and broad-leaved forest, Jiaohe, Jilin, China

Ling-Jun MENG,Jie YAO,Jiang-Huan QIN,Chun-Yu FAN,Chun-Yu ZHANG,Xiu-Hai ZHAO

表2 幼苗物种数量组成

Table 2 Quantitative composition of seedling species

树种 Species 幼苗数量 No. of seedlings 新生幼苗数量(新生率) No. of recruitment (Recruitment rate (%)) 死亡幼苗数量(死亡率) No. of mortality (Mortality rate (%)) 幼苗密度 Seedling density (Ind.·m-2) 分布的样方数 No. of stations occupied 重要值 Important value 2016 2017 2016 2017 2016-2017 2016 2017 2016 2017 2016 2017 水曲柳 Fraxinus mandschurica 1 769 796 871 (49.2) 213 (26.8) 1 186 (67.0) 2.116 0.952 498 317 52.28 42.11 色木槭 Acer mono 199 177 7 (3.5) 16 (9.0) 38 (19.1) 0.238 0.212 143 124 9.59 12.45 紫椴 Tilia amurensis 306 124 274 (89.5) 89 (71.8) 271 (88.6) 0.366 0.148 169 81 12.58 8.38 东北枫 Acer mandshuricum 127 159 12 (9.4) 44 (27.7) 12 (9.4) 0.152 0.19 100 120 6.5 11.68 红松 Pinus koraiensis 192 121 156 (81.3) 35 (28.9) 106 (55.2) 0.230 0.145 94 60 7.38 7.08 簇毛枫 Acer barbinerve 101 107 17 (16.8) 14 (13.1) 8 (7.9) 0.121 0.128 34 31 3.22 4.99 胡桃楸 Juglans mandshurica 43 29 20 (46.5) 14 (48.3) 28 (65.1) 0.051 0.035 40 25 2.46 2.31 杉松 Abies holophylla 35 29 13 (37.1) 5 (17.2) 11 (31.4) 0.042 0.035 28 24 1.81 2.25 蒙古栎 Quercus mongolica 1 62 0 (0) 62 (100) 1 (100) 0.001 0.074 1 27 0.06 3.41 千金榆 Carpinus cordata 30 21 14 (46.7) 6 (28.6) 15 (50) 0.036 0.025 26 19 1.64 1.72 裂叶榆 Ulmus laciniata 24 21 0 (0) 0 (0) 3 (12.5) 0.029 0.025 16 17 1.10 1.61 糠椴 Tilia mandshurica 10 6 4 (40.0) 1 (16.7) 5 (50) 0.012 0.007 8 5 0.52 0.47 春榆 Ulmus davidiana var. japonica 9 5 3 (33.3) 1 (20.0) 5 (55.6) 0.011 0.006 8 4 0.50 0.38 三花枫 Acer triflorum 2 4 1 (50) 2 (50) 0 0.002 0.005 2 4 0.12 0.35 黄檗 Phellodendron amurense 2 3 1 (50.0) 3 (100) 2 (100) 0.002 0.004 2 3 0.12 0.26 青楷枫 Acer tegmentosum 2 3 0 (0) 3 (100) 2 (100) 0.002 0.004 2 2 0.12 0.21 毛榛 Corylus mandshurica 0 4 0 4 (100) 0 0 0.005 0 2 0 0.24 水榆花楸 Sorbus alnifolia 0 1 0 1 (100) 0 0 0.001 0 1 0 0.09 共计 Total 2 852 1 672 1 393 (48.8) 513 (30.7) 1 693 (59.4) 3.411 2.001