浙江建德楠木天然林群落种间联结动态  

Interspecific association dynamics of Nanmu natural forest in Jiande,Zhejiang Province

作　　者：吴丹婷 吴初平[2] 盛卫星[3] 焦洁洁[2] 江波[2] 朱锦茹[2] 袁位高[2] WU Danting;WU Chuping;SHENG Weixing;JIAO Jiejie;JIANG Bo;ZHU Jinru;YUAN Weigao(School of Forestry and Biotechnology,Zhejiang A&F University,Hangzhou 311300,Zhejiang,China;Zhejiang Academy of Forestry,Hangzhou 310023,Zhejiang,China;Forestry Bureau of Jiande,Jiande 311600,Zhejiang,China)

机构地区：[1]浙江农林大学林业与生物技术学院,浙江杭州311300 [2]浙江省林业科学研究院,浙江杭州310023 [3]建德市林业局,浙江建德311600

出　　处：《浙江农林大学学报》2021年第4期671-681,共11页Journal of Zhejiang A&F University

基　　金：浙江省省院合作林业科技项目(2018SY08)。

摘　　要：【目的】以浙江省建德市寿昌林场绿荷塘林区内楠木优势程度不同的天然林作为研究对象,进行种间关系的分析,揭示楠木在天然林群落发育和演替过程中种间关联性动态变化规律。【方法】分别在2015和2019年,对2个楠木优势程度不同的天然林样地进行调查,基于2×2联列表,通过χ^(2)检验、联结系数、共同出现百分率,研究调查样地内楠木在不同林分条件下,乔木层、灌木层、草本层的种间联结性。【结果】2015和2019年,天然楠木优势林样地乔木层总体种间关联性均呈显著正联结,灌木层和草本层种间总体关联性趋向于负联结;天然楠木伴生林乔木层、灌木层、草本层种间总体关联性趋向于负联结。在这2种天然林中,楠木在乔木层与其他树种之间的联结相对独立,在灌木层和草本层的种间竞争较为激烈,且均有楠木在垂直方向上表现出林分断层现象。【结论】在天然林中,将楠木作为目标树种进行管理与保护时,可采用间伐、择伐等抚育方法,保留与楠木有显著正关联的树种,伐除负关联的树种,缓和种间矛盾;疏伐上层高大乔木,增加林窗,以满足林分更新层对光照的需求,保护其更新层,以形成完整的垂直结构。图7表4参22。[Objective]This study aims to investigate the interspecific relationship of natural forest of Nanmu with different dominant degrees in Shouchang Forest Farm of Jiande City,Zhejiang Province,so as to reveal the dynamic change rules of the interspecific association in the process of community development and succession.[Method]In 2015 and 2019,two natural forest plots with different dominance of Nanmu were investigated.Based on the 2×2 contingency table,the interspecific association of tree layer,shrub layer and herb layer of Nanmu under different stand conditions was studied by χ^(2) test,association coefficient,and percentage of co-occurrence.[Result]In 2015 and 2019,the overall interspecific association of tree layer was significantly positive,while that of shrub layer and herb layer tended to be negative.In the natural stands with Nanmu as associated tree,the correlation among tree layer,shrub layer and herb layer tended to be negative.In both stands,Nanmu showed stand fault phenomenon in vertical direction.In the tree layer,the association between Nanmu and other species was relatively independent,while the interspecific competition between Nanmu and other species in shrub layer and herb layer was intense.[Conclusion]In natural forests,thinning,selective cutting and other tending methods can be adopted when Nanmu is taken as the target tree species for management and protection.The tree species with significant positive correlation with Nanmu are retained and the tree species with negative correlation are cut down to ease the interspecific contradiction.Thinning tall trees in the upper layer and increasing the forest gap can meet the needs of illumination for renewal layer.Protecting the renewal layer is conducive to the formation of a complete vertical structure.[Ch,7 fig.4 tab.22 ref.].

关 键 词：楠木 种间联结 天然林 浙江建德 

分 类 号：S718.5[农业科学—林学]