楠木杉木混交林生长效应研究

采用3个处理4次重复的完全随机区组设计对楠木与杉木混交林生长效应进行研究 结果表明: 楠木与杉木混交对林木生长有促进作用, 混交林中楠木的胸径、树高、单株材积和林分蓄积均明显高于楠木纯林, 分别为楠木纯林的121 2%、134 6%、194 4%和104 8%; 混交林中杉木的胸径、树高、单株材积也明显高于杉木纯林, 分别为杉木纯林的124 36%、104 2%和164 1%, 其杉木蓄积量也达到了杉木纯林的82 9%; 楠杉混交林林分生物量高于各自纯林, 分别为楠木纯林和杉木纯林的254 4%和134 8%; 不同林分林下植被生物量大小排序为楠木纯林>混交林>杉木纯林

Study on growth effect of the mixed forest of Cunninghamia lanceolata and Phoebe bournei

The growth effect of the mixed forest of Cunninghamia lanceolata and Phoebe bournei were investigated by the randomized complete block design of three treatments and four replications.The results showed that the mixed forest of Cunninghamia lanceolata and Phoebe bournei could improve its growth.The DBH,height and volume of the mixed forest were higher than those of the pure forest of Cunninghamia lanceolata and the pure forest of Phoebe bournei.The biomass of the mixed forest was increased by 254.4%,134.8% respectively compared with that of the pure Cunninghamia lanceolata forest and the pure Phoebe bournei forest.The understory biomass in different forests ranked in the sequence of the pure Phoebe bournei forest>the mixed forest>the pure Cunninghamia lanceolata forest.