内蒙古罕山自然保护区山杨林更新苗特征研究  

Characteristics of Regenerated Seedlings of Poplar Forest in Hanshan Nature Reserve,Inner Mongolia

作　　者：包青春 赵鹏武[2,3] 包宝祥 管立娟 宝虎 BAO Qing-chun;ZHAO Peng-wu;BAO Bao-xiang;GUAN Li-juan;BAO Hu(Hohhot Institute for Nationalities,Hohhot 010051,Inner Mongolia,China;Chifeng Forest and Grassland Protection and Development Center,Chifeng 024000,Inner Mongolia,China;Inner Mongolia Agricultural University,Hohhot 010019,Inner Mongolia,China;Inner Mongolia Saihanwula Forest Ecosystem National Positioning Observation and Research Station,Chifeng 025150,Inner Mongolia,China;Tongliao Forestry Research Institute,Tongliao 028000,Inner Mongolia,China)

机构地区：[1]呼和浩特民族学院,内蒙古呼和浩特010051 [2]内蒙古农业大学,内蒙古呼和浩特010019 [3]内蒙古赛罕乌拉森林生态系统国家定位观测研究站,内蒙古赤峰025150 [4]内蒙古赤峰市森林草原保护发展中心,内蒙古赤峰024000 [5]通辽市林业和草原科学研究所,内蒙古通辽028000

出　　处：《西北林学院学报》2023年第2期113-118,共6页Journal of Northwest Forestry University

基　　金：内蒙古自然科学基金面上项目(2020MS04011);中央引导地方科技发展资金项目(2020ZY0024);国家自然科学基金项目(41861005)。

摘　　要：以内蒙古罕山国家级自然保护区山杨次生林为研究区,研究区内近些年出现大面积非正常死亡的山杨林,在山杨林中分别设置倒木、枯立木与对照3类样地进行死亡后更新调查。研究发现,罕山自然保护区山杨林倒木样地、枯立木样地、对照样地更新树种主要以山杨为主,并且均为萌生更新,更新密度总体呈枯立木样地>对照样地>倒木样地,平均更新苗密度分别为3158.33、2466.66、2308.33株/hm 2,郁闭度、林分密度、年均温度和海拔与山杨更新密度呈负相关(P<0.05),枯落物厚度与山杨更新密度呈正相关(P<0.05),年累计降水量未达到显著水平。并且发现山杨林非正常大面积死亡后根系仍然具有萌蘖的活力,在死亡后萌蘖更新得到快速释放,且具有形成新一代森林的潜力。In this paper,Populus secondary forests occurring in the Hanshan National Nature Reserve in Inner Mongolia was taken as the study area where massive tree mortality has been occurred abnormally in recent years.Three types of sample plots,namely,fallen wood(FW),dead standing wood(DSW)and control(Ctrl)plots,were set up in the poplar forest for post-death update investigation.The study found that the dominant regenerated tree species was Populus in three plots.The regeneration density was generally in the order of DSW>Ctrl>FW with an average of 3158.33,2466.66,and 2308.33 plants/hm 2,respectively.Canopy density,stand density,annual average temperature and altitude were negatively correlated with the regeneration density of Populus(P<0.05),and the thickness of litter was positively correlated with the regeneration density(P<0.05).It was also found that after the occurrence of the massive mortality,the root system of the poplar dead trees still had the vitality of tillering,and the regeneration of the tillering was quickly released after death,and it had the potential to form a new generation of forest.

关 键 词：罕山自然保护区 天然山杨林 森林死亡 森林更新 

分 类 号：S728.9[农业科学—林木遗传育种]