毛竹混交林群落生物量结构比较

在福建泰宁县大田乡选择4种不同经营模式的毛竹林分,即模式A为毛竹阔叶树混交林(树冠投影比5∶5)、模式B为毛竹阔叶树混交林(树冠投影比8∶2)、模式C为毛竹纯林、模式D为毛竹杉木混交林,分析比较不同模式的毛竹林分生物量结构,结果表明:不同模式林分的毛竹胸径、竹高等生长因子差异显著,阔叶混交林的毛竹平均单株生物量、胸径和竹高值较高;毛竹单株器官生物量以竹秆所占比例最大,达46.81%～54.27%,其中以模式B的最高;毛竹单株总生物量最大的为模式A,达34.98 kg/株;毛竹群落总生物量最大的为模式D,达139.42 t/hm2。

Biomass Structure Comparison on Moso Bamboo Mixed Forest Communities

Four different management mode Moso Bamboo stands are selected from Datian Township,Taining County,Fujian Province,i.e.,Mode A,Moso Bamboo and broadleaf tree mixed forest(crown projection ratio of 5:5);Mode B,Moso Bamboo and broadleaf tree mixed forest(crown projection ratio of 8:2);Mode C,Moso Bamboo pure forest;Mode D,Moso Bamboo and China fir mixed forest.Through analysis and comparison to different mode Moso Bamboo stand biomass structure,the results show that:the differences are outstanding between such growing factors as Moso Bamboo DBH C diameter at breast height) and bamboo height,etc.of different mode stand,and the Moso Bamboo mean individual biomass,DBH and bamboo height value in broad leaf mixed forest are relatively high;the individual organ biomass of Moso Bamboo takes bamboo stem,s percentage as the biggest one,up to 46.81 %~54.27 %,among them,Mode B is the highest one;for the individual gross biomass of Moso Bamboo,the highest one is Mode A,up to 34.98 kg/tree;for community gross biomass of Moso Bamboo,the highest one is Mode D,i.e.,bamboo and China fir mixed forest,up to 139.42 t/hm2.