福建光泽南方铁杉天然林的生长规律与生物量

对福建光泽南方铁杉天然林的生长规律与生物量进行研究。结果表明,46年生南方铁杉平均树高、胸径和单株带皮材积分别为11.8 m、22.5 cm和0.251 67 m3;南方铁杉早期生长较慢,前10 a树高总生长量仅为1.78 m,树高、胸径和材积连年生长量分别于第20、42和46年达到最大值,分别为0.95 m.a-1、0.81 cm.a-1和0.004 87 m3.a-1,第46年仍未达到材积的数量成熟龄;46年生南方铁杉平均单株总生物量为223.223 kg.株-1,各器官的生物量大小顺序为干>根>枝>带叶小枝>皮,其地上部分与地下部分生物量组成比为3.228∶1。

Growth and biomass of Tsuga chinensis var.tchekiangensis in a natural forest in Guangze,Fujian,China

Growth processes and biomass of Tsuga chinensis var.tchekiangensis in a natural forest in Guangze,Fujian,China were studied.The results showed that average tree height,diameter at breast height(DBH) and tree volume were 11.8 m,22.5 cm and 0.251 67 m3 · stem-1,respectively,for the 46-year-old T.chinensis trees in the natural forest.The T.chinensis trees grew slowly at early stage and tree height were only 10.78 m at 10 years old.Current annual increment of trre height,DBH and tree volume were highest at 20,42 and 46 year old,respectively,and were 0.95 m · a-1,0.81 cm · a-1 and 0.004 87 m3 · a-1,respectively.The 46-year-old T.chinensis trees did not reached their volume quantitative maturity age.The tree biomass of the 46-year-old T.chinensis trees were 223.223 kg · stem-1.Biomass of different components in the tree were in the order of stem>root>branch>twig and leaf>bark,and the ratio of above-ground to under-ground biomass was 3.228∶ 1.