闽北杉木人工林生物量及其分配的动态变化

目的]研究杉木生物量及其分配的动态变化。方法]以闽北杉木林为研究对象,在典型区域设置46块样地,采用收获法测定46株标准木的生物量,林龄为5~33年。结果]建立了闽北杉木器官及整株生物量与测树指标(胸径和树高)的回归模型;除树枝和树叶外,其他器官(树干、地上和树根)及整株的回归效果良好;随着林龄的增加,器官及整株生物量逐渐增加,在林龄为40年左右时达到稳定,同时构建了林木生物量与林龄的回归模型;随着林龄的增加,树干生物量的比例逐渐增加,其他器官生物量的比例逐渐减小,并在林龄为25年左右达到稳定。结论]随着林龄的增加,杉木生物量及其分配呈现可预测的动态变化。

Dynam ic Changes of Biomass and its Allocation of Cunninghamia lanceolata Plantation in Nor thern Fujian Prov ince

Abstrcat Objective] To research the dynamic changes of biomass and its allocation of Cunning hamia lanceolata Plantation in Northern Fujian Province .Method] With C.lanceolata plantation as the research object, 46 sample plots were designed in typical region.Biomass of 46 sample trees was detected by harvesting method.Stand age was within the range of 5-33.Result]Regression mode between C.lanceolata organ and bio-mass and the detection indexes (diameter at breast height and plant height) was established.Except leaf and branch,other organs and the whole plant had relatively good regression.With the increase of stand age,biomass of organ and whole plant increased gradually,and reached stable at about 40stand age .Regression model of wood biomass and stand age was established.With the increase of stand age,percentage of trunk biomass increased gradually;while those of other organs decreased gradually.The stand age was stable at about 25 years.Conclusion] With the increase of stand age, C.lanceolata biomass and its allocation show predictable dynamic changes.