摘要
以内蒙古大兴安岭寒温带兴安落叶松林3个年份的重度火烧迹地为研究对象,利用样地调查数据,阐述重度火烧迹地森林恢复的重要性,研究其林分结构特征及植物多样性为该迹地森林恢复与重建提供理论依据。采用SPSS及R语言进行分析,研究林分结构以及植物多样性变化情况。结果表明:林地经过重度火干扰后,树种的平均胸径有所增大,其林分胸径分布频率均符合威布尔分布,为单峰形偏左倾分布。火干扰后植被物种多样性与火烧强度和火烧时间紧密相关,重度火烧迹地在不同恢复时间上恢复的植物种类有所不同,植物种的α多样性指数因恢复时间的变化而变得较为复杂,其多样性指数总体上呈先上升后下降的趋势。一段时间内高强度的火干扰有利于森林群落内植物种多样性不断更新与恢复。
Taking the severely burned areas in three years of Larix gmelinii forest in the cold temperate zone of the Greater Xing’an Mountains in Inner Mongolia as the research object,using the sample survey data,the importance of forest restoration in the severely burned area was explained,and the forest structural characteristics and plant diversity were studied for forest restoration in this area to provide theoretical basis for forest reconstruction.SPSS and R language were used for analysis to study the stand structure and changes of plant diversity.The results show that after severe fire disturbance in the forest land,the average DBH of tree species has increased,and the distribution frequency of DBH of the stands conforms to Weibull distribution with a single-peaked leftward distribution.After fire disturbance,the vegetation species diversity is closely related to fire intensity and fire time.The species of plants recovered at different recovery times in severely burned area are different.The alpha diversity index of plant species becomes more complicated due to changes in recovery time,and its diversity index has generally showed a trend of rising first and then decreasing.High-intensity fire disturbance for a period of time is conducive to the continuous renewal and restoration of plant species diversity in forest communities.
作者
杨芳健
铁牛
张准霞
张晨
胡静杉
YANG Fang-jian;TIE Niu;ZHANG Zhun-xia;ZHANG Chen;HU Jing-shan(Forestry College of Inner Mongolia Agricultural University,Hohhot 010019,China)
出处
《内蒙古林业科技》
2020年第2期8-14,共7页
Journal of Inner Mongolia Forestry Science and Technology
基金
国家重点研发计划重点专项“大兴安岭火烧及采伐迹地幼苗更新和植被恢复影响机制及抚育技术”(2017YFC0504003-2)
内蒙古自治区科技成果转化项目(CGZH2018058)资助。
