杉木观光木混交林的生长状况及生物量研究

通过对三明中亚热带杉木观光木混交林和杉木纯林的生长状况及生物量的研究 ,结果表明 ,与纯林相比 ,混交林中杉木的平均胸径、树高、单株材积及单株生物量均得到提高 ,单株细根量增加 2 4 5 4 % ,林分总蓄积量增加 14 72 % ,林分总生物量增加 2 7 4 % ,表明混交林比纯林有更高的生产力。混交林中杉木单株生物量是观光木的 1 85倍 ,且具有明显的树干有机物积累优势。与纯林相比 ,混交林乔木层生物量占林分总生物量比例较高 ,而林下植被层则较小

Studies on the Growth Status and Biomass of Cunninghamia lanceolata and Tsoongiodendron odorum Mixed Forests

The results show that the average dbh,heights,individual-tree volumes and biomass of mixed forests increase as compared with those of pure forests.The individual-tree fine root amount increases by 24.54%,stand total stocking increases by 14.72%,stand total biomass increases by 27.4%,which indicates that the mixed forests possess higher productivity as compared with the pure forests.The individual-tree biomass of Cunninghamia lanceolate in mixed forests is 1.85 times as large as that of Tsoongiodendron odorum, and furthermore,it has obvious stem organic matter accumulation dominance.