对福建省建瓯市东安林场的杉木〔Cunninghamia lanceolata (Lamb.) Hook.〕人工混交林乔木层结构及动态进行了分析比较。结果表明,6种混交林中杉木的长势均优于杉木纯林,其中杉木-楠木〔Phoebe  bournei(Hemsl.) Yang〕混交林中杉木的平均胸径、平均树高和平均单株净生产力均最大,分别达到19.5cm、15.5m和0.00284m3·a-1;杉木-檫木〔Sassa fras tzumu (Hemsl.) Hemsl.〕混交林中杉木的平均胸径和平均单株净生产力最小,分别仅为15.7cm和0.00182m3·a-1;杉木-樟树〔Cinnamomum camphora (L.) Presl〕混交林中杉木的平均树高最低,仅为14.1m。在6种混交林中,除杉木-檫木混交林中杉木的功能重要值小于檫木外,其他混交林中杉木的各项重要值均大于其混生树种,表明杉木在与混交树种的竞争中处于优势地位。

Structures and dynamics of tree layer in different artificial mixed forests of Cunninghamia lanceolata (Lamb.) Hook.in Dong'an forest farm of Fujian Province were analyzed. The results showed that the growth of C. lanceolata in all mixed forests was better than that in pureforest. Among six mixed forests, average value of DBH, average tree height and average net productivity per tree of C. lanceolata in C. lanceolata-Phoebe bournei (Hemsl.) Yang mixed forest were the biggest, which were 19.5cm,15.5m and 0.002 84m 3·a- 1respectively.In C. lanceolata-Sassafras tzumu (Hemsl.) Hemsl. Mixed forest, average value of DBH and average net productivity per tree of C. lanceolata were the smallest with quantities of 15.7cm and 0.001 82m 3·a^{- 1}respectively, and average tree height of C. lanceolata in C. lanceolata-Cinnamomum camphora(L.) Presl mixed forest was the smallest (14. 1m). Except the function importance value of C. lanceolata in C. lanceolata -S. tzumu mixed forest was smaller than that of S. tzumu, all importance values of C. lanceolata were bigger than those of mixed tree species in the others mixed forests. It is concluded that C. lanceolata has acompeting advantage in competition with its mixed tree species in mixed forests.