杉木乳源木莲异龄复层林的生长效果分析  

Growth of Cunninghamia lanceolata and M.yuyuanensis Multilayer Forests

作　　者：叶文建 Ye Wenjian(Xudun Forestry Station of Jian'ou City,Fujian Province,Nanping 353100,China)

机构地区：[1]福建省建瓯市徐墩林业工作站,福建南平353100

出　　处：《防护林科技》2020年第11期24-25,33,共3页Protection Forest Science and Technology

摘　　要：通过对杉木和乳源木莲人工异龄复层林的生长调查,以研究杉木纯林强度间伐后套种乳源木莲的林分生长效果。结果表明:复层林中17年生的乳源木莲胸径、树高和单株材积年平均生长量分别为0.80 cm、0.69 m和0.0050 m 3;坡位对杉木和乳源木莲复层林的生长影响显著,均是下坡位生长最好、中坡位次之、上坡位最差;下坡位乳源木莲的平均胸径、平均树高和平均单株材积比上坡位高出22.61%、29.73%和103.42%;下坡位杉木的平均胸径、平均树高和平均单株材积比上坡位高出16.29%、18.08%和61.97%。乳源木莲适于在强度间伐的杉木林下套种,且在土层深厚、水肥条件较好的林地种植效果更好,可作为构建杉阔异龄复层混交林的树种之一。By investigating and analyzing the growth of Cunninghamia lanceolata and M.yuyuanensis artificially different-layered double-layered forests,the growth effect of the Cunninghamia lanceolata stand intensively thinning and interplanting M.yuyuanensis was investigated.Result shows that the DBH,tree height&volume average annual growth of M.yuyuanensis(17 a)in the double-layer forest is 0.80 cm.a-1,0.69 m.a-1,and 0.0050 m 3.a-1,respectively;the slope position has a significant impact on the growth of Cunninghamia lanceolata&M.yuyuanensis double-layer forests,both of which have the best growth on the downslope,followed by the middle slope,and the worst on the up slope;the average DBH,average tree height,and average volume of M.yuyuanensis in the downhill position is 22.61%,29.73%,and 103.42%respectively higher than those in the uphill position;the average DBH,average tree height,and average volume ratio of Cunninghamia lanceolata in the downhill position were uphill they is 16.29%,18.08%&61.97%higher.Result shows that M.yuyuanensis is suitable for interplanting under the Cunninghamia lanceolata forest under intensive cutting,and the planting effect is optimal in forests with deep soil layers and better water and fertilizer conditions,and it could be used as one of the tree species for constructing mixed forests of heterogeneous fir and broad age.

关 键 词：杉木 林下套种 乳源木莲 复层林 林木生长 

分 类 号：S791.27[农业科学—林木遗传育种] Q949.747.1[农业科学—林学]