峦大杉与杉木人工林生物量研究

Research on the Biomass of Cunninghamia konishii Hayata and Chinese fir Plantations

以福建省国有来舟林业试验场24年生的峦大杉与1.5代杉木对比试验的人工林为研究对象,选取样木进行分层取样测定不同器官生物量,对峦大杉与杉木的生物量进行比较。结果表明:峦大杉和杉木样木单株各器官生物量差异极显著或显著。生物量模型W=a DbHc对峦大杉和杉木生物量模拟效果较好。峦大杉和杉木各器官生物量在垂直结构分布上表现出相同的变化趋势,树干、树皮各区分段的生物量随树干高度的升高而呈明显减小的趋势,树枝、树叶各区分段的生物量随高度的升高呈现出先增加而后又逐渐减少的变化趋势。在相同的立地质量条件下,峦大杉林分生物量为185.20 t·hm-2,杉木林分生物量为133.73 t·hm-2,峦大杉林分表现出的生产力高于1.5代杉木林分的生产力。通过研究初步揭示峦大杉生物量的分布规律,为峦大杉人工林的科学经营提供参考。

Selecting sampling trees and taking samples from different stratums of the sample plots to determine the biomass of differ- ent organs, compare the biomass of Cunninghamia konishii Hayata with that of 1.5 generation of Chinese fir in 24-year-old Cunning- hamia konishii Hayata and Chinese fir plantation, located in Laizhou National Forestry Trial Farm. The result indicated that ： The difference of each organ＇s biomass was extremely significant or significant. The biomass models W = aDbHc can fit the biomass of Cunninghamia konishii Hayata and Chinese fir better than the biomass models W = a （D2H）b. With the increasing of height, the bio- mass of trunk and bark decreased, and the biomass of branch and leaf increased and then decreased. On the basis of similar site con- dition,the biomass of Cunninghamia konishii Hayata was 185.20 t·hm^-2 and the biomass of Chinese fir was 133.73 t·hm^-2. On the basis of similar site condition, the productivity of Cunninghamia konishii Hayata stand was higher than the that of 1.5 generation Chinese fir stand. The article revealed the distribution regularity of the biomass, which provided the theory basis for Cunninghamia konishii Hayata plantation＇s scientific management.