落叶松人工林群落结构特征及自然化经营  

A study on the naturalization and community structure characteristics of Larix gmelinii plantation

作　　者：屈红军[1] 牟长城[1] 李婉姝[1] 

机构地区：[1]东北林业大学林学院,黑龙江哈尔滨150040

出　　处：《南京林业大学学报（自然科学版）》2010年第4期153-156,共4页Journal of Nanjing Forestry University：Natural Sciences Edition

基　　金：黑龙江省科技攻关项目(GA07B301-02)

摘　　要：采用样带网格调查、群落重要值分析和径级划分方法,研究落叶松(Larix gmelinii)人工林的自然化趋势及群落的树种组成结构和径级结构。结果表明:沿由下至上的坡位梯度,落叶松在群落中均占有优势地位(重要值0.376～0.461),红松在群落中占有次优势地位,且呈现逐渐增强趋势(重要值0.279～0.402),阔叶树在群落中也占有一定的比例(重要值0.186～0.290),群落均呈现明显的自然化趋势。落叶松大径级林木比例减少(29.79%～11.32%),中径级林木比例增加(68.08%～88.68%);阔叶树中径级林木比例增加(18.18%～58.34%),小径级林木比例减少(81.82%～41.66%),没有大径级林木;红松中径级林木比例增加(7.68%～15.00%),小径级林木比例减少(92.32%～85.00%),没有大径级林木。因此,应重视落叶松人工林下阔叶树与红松的培育。An experiment was conducted to study the community species composition , diameter class structure and the naturalization trend of larch plantation by using sample plot with net check survey method , community importance value analysis method and diameter class division method. Results show that： along the gradients of slope position from upper to lower, larch predominate in each community （importance value 0.376—0.461）, Korean pine occupy the sub-dominance and present gradually increasing trend（importance value 0.279—0.402）, hardwood trees also occupy certain proportion（importance value 0.186—0.290）, and all the communities present obvious naturalization trend; proportions of larger diameter class larch reduce（29.79 %—11.32 %） while middle diameter class larch proportions increase（68.08 %—88.68 %）, proportions of middle diameter class hardwood trees increase （18.18 %—58.34 %） and small diameter class trees reduce（81.82 %—41.66 %）. There is no large diameter class trees exist, proportions of middle diameter class Korean pine increase（7.68 %—15.00 %） while smaller diameter class trees reduce （92.32 %—85.00 %） and no large diameter class trees exist. Therefore, more attention should be paid to cultivating Korean pine and hardwood trees under larch plantation.

关 键 词：落叶松人工林 自然化经营 结构特征 

分 类 号：S718.542[农业科学—林学]