封育柞蚕场蒙古栎林不同恢复阶段种群结构与群落多样性研究  

The population structure and species diversities of different restoration stages in Quercus mongolica stands of closed tussah fields

作　　者：金刚[1] 尤文忠[1] 赵刚[1] 侯庚 

机构地区：[1]辽宁省林业科学研究院,辽宁沈阳110032 [2]辽宁省杨树研究所,辽宁盖州115200

出　　处：《辽宁林业科技》2010年第2期6-10,17,共6页Liaoning Forestry Science and Technology

基　　金：国家林业公益性行业科研专项资助项目(200804006/rhh-03);辽宁省森林生态重点实验室专项计划项目(2006-2010)

摘　　要：采用空间代替时间的方法,以柞蚕场蒙古栎在平茬后经不同时间(9年、12年、57年)封育保护而形成的蒙古栎次生林及对照柞蚕场蒙古栎林(3年生)为研究对象,对辽东山区蒙古栎次生林不同恢复阶段的种群结构与群落多样性进行了深入分析。研究结果表明:随封育林龄的增长,乔木层蒙古栎种群所占的重要值比例在降低,蒙古栎林在恢复演替进程中不断向阔叶混交林的方向发展;灌木物种间的重要值差距在减小;草本层植物种类在不断减少;蒙古栎林优势种群径阶分布宽度增加,径阶分布趋向于正态分布。在封育不同恢复阶段,羊胡苔草重要值均表现为最大,是草本群落最主要的物种。不同恢复阶段林分乔木层、灌木层物种多样性表现为随封育林龄的增长而增大,草本层多样性表现为随封育林龄的增长而减小。By means of the method of space for time and based on the secondary forests of Quercus mangolica formed after stumped and closed for different times （9, 12 and 57 years respectively） and taking 3 years of Quercus mongolica forests in tussah fields as control, in-depth analyses on the population structures and the st^cies diversifies of different restoration stages for secondary forests of Quercus mongolica in mountainotus areas in eastern Liaoning were oonducted. The results showed that： as the agees of closed forests increased, the ration of the importance value （IV） of Quercus mongolica population in tree. layer decre^ased and Quercus mongolica forests developed gradually towards broad-leaved mixed forests in the courses of restoring succession, the difference of IV among the. shrub species de- creased, the species in herb layer dec.mased continuously, the width of diameter class distribution for dominated population of Quercus mongolica increased and diameter class distribution tended to be a normal distribution. In different restoration stages, IV of Carex callitras which was the most important species in the herbal commtmity was the biggest, and the species diversifies in tree and shrub layer in- creased with the increment of ages of closed forests, whereas the species diversifies in herbal layer decreased.

关 键 词：封育 蒙古栎次生林 种群结构 群落多样性 

分 类 号：S718.542[农业科学—林学]