摘要
为探讨黔东南州杉木不同龄级纯林及中龄期混交林林分生长及生物量变化规律,采用空间替代时间的方法,对8个杉木纯林及混交林固定样地(20m×20m)持续了3a定位观测。结果表明:随龄级增大,杉木纯林平均胸径和高度增加、郁闭度和密度降低,平均胸径和高度的年生长量降低;乔木层植物树干、枝叶和总生物量蓄积量增加、年生长量降低,凋落物年产量增加。中龄期混交杉木林林分生长及生物量和凋落物产量受混交树种及株数比例的影响,部分类型间林分结构指标及生物量差异显著。杉木纯林生物量归还率和枯落物更新率随龄级增大而增加,混交杉木林类型间存在一定差异。
In order to explore change laws of biomass annual growth and dynamics of pure forest at different age classes and mixed-species forest at middle age class of Cunninghamia lanceolata plantations in southeast Guizhou province, China, the eight fixed sample plots （20 m × 20 m） were locating observed lasted near 3 years with the method of space instead of time. Results showed that with Chinese fir pure forest age increasing, average values of diameter at breast height （DBH） and height were increased, and values of crown density and tree density were decreased, annual growth of DBH and height were reduced, biomass of standing crop of trunk, branches and leaves and whole plants of tree layer were increased, and the corresponding values of annual growth were decreased, litter production were increased. Stand growth and biomass and litter production of mixed-species forest were influenced by mixed-specie biological characteristics and number of proportion of Chinese fir, values difference of some indicators of plantation structure and biomass were significant. Biomass return rate and litter update rate were increasing with Chinese fir pure forest age adding, mixed species and number ratio of Chinese fir changed the corresponding values of the mixed forest. The results of the study provide a scientific basis for plantation and forest carbon sequestration management of Chinese fir.
出处
《林业科技通讯》
2017年第5期17-22,共6页
Forest Science and Technology
基金
贵州省科技攻关项目(黔科合SY字[2012]3010)
贵州省林业科技项目(2012-18)
关键词
杉木
纯林
混交林
生物量归还率
枯落物更新率
Chinese fir
pure forest
mixed-species forest
biomass return rate
litter update rate
作者简介
赵庆萍（1984-），助理工程师，主要从事计算机应用和森林生态方面的研究。
通讯作者简介：张喜（1964-），研究员，主要从事森林生态和竹林经营方面的研究。E-mail：zhangxigzfa@tom．com
