木兰围场天然次生油松林年龄结构及更新动态研究  

Age structure and dynamics of natural secondary forest of Pinus tabulaeformis Carr.in Mulanweichang Natural Conservation Area

作　　者：李想[1] 王锦[2] 赵娜[3] 李玉灵[1] 

机构地区：[1]河北农业大学林学院,河北保定071000 [2]河北农业大学人文学院,河北保定071000 [3]北京林业大学水土保持学院,北京100083

出　　处：《河北林果研究》2016年第1期1-7,共7页Hebei Journal of Forestry and Orchard Research

基　　金：河北省高层次人才基金资助项目"基于京津冀协同发展的河北省生态安全规划研究"(B2014010004);国家林业局林业行业公益专项"环京津生态脆弱区生态经济植被建设技术研究"(201404214)

摘　　要：通过对天然次生油松林下更新状况的调查,编制静态生命表、绘制存活曲线,研究分析河北木兰围场自然保护区内不同立地条件（坡底、坡中、坡顶）下天然油松次生林的年龄结构和更新动态,结果表明：（1）影响天然次生油松林更新的主要因子是郁闭度、灌草盖度。较高郁闭度、较高湿度更利于油松更新,幼苗更新密度最大值达4.192株/m2。（2）该保护区不同立地条件下油松种群年龄结构均为增长型年龄锥体;0~10a生个体数最多,坡中处最多达525株;生命期望最大值集中于10~20a龄级,该龄级属于生理旺盛期,应予以保护。（3）不同立地条件下油松种群的存活曲线变化趋势相似,油松存活率均在10~20a生间急剧下降;在20~60a生间,除坡底30~60a生存活曲线逐渐下降外,坡中和坡顶的存活曲线均大体趋于稳定,但60a生后3块标准地存活曲线均大幅下降,其中坡底处油松种群在70a存活率最小,为0;整体而言,存活率由大到小依次为坡顶、坡底、坡中。According to the investigation of updating status of natural secondary Pinus tabulaeformis Carr.seedlings,the static life table and the survival curve were compiled and drawn.The age structure and updating dynamic of the natural secondary forest community of Pinus tabulaeformis Carr.were studied and analyzed in different habitats（bottom of the hill,steep slope and top of slope）of Mulan Weichang Natural Conservation Area in Hebei Province.The results showed that：（1）The influence factors of natural regeneration of Pinus tabulaeformisCarr.were canopy density and the coverage of shrubs and herbs.High canopy density and humidity are more conducive to regeneration,with the maximum density of Pinus tabulaeformis Carr.seedlings at 4.192plant/m2.（2）The ecological pyramids of Pinus tabulaeformis Carr.population all increased in different habitats.The number of individuals of Pinus tabulaeformis Carr.between 0~10age was the biggest among all age classes,with up to 525 strains of Pinus tabulaeformis Carr.in steep slope.The life expectation maximum level focused on the age of 10 ~ 20,which was the exuberant physiological period requiring for protection.（3）The survival curves of Pinus tabulaeformis Carr.population at different habitats changed similarly.Survival rate of Pinus tabulaeformis Carr.between 0~10age decreased sharply.Except that the survival curve of Pinus tabulaeformis Carr.between 30~60age at the bottom of the hill decreased,the survival rate of other Pinus tabulaeformis Carr.aged between 20~60keeped stable.The survival curve of the population over 60 years old at the three standard areas all plunged.The Pinus tabulaeformis Carr.populations at the age of 70 at the bottom of the hill had the minimum survival rate of 0.The order of survival rate at the three plots was slope roof〉 bottom of the hill〉 steep slope.

关 键 词：天然次生油松林 年龄结构 种群更新动态 木兰围场自然保护区 

分 类 号：S754[农业科学—森林经理学]