CAJ | 학술논문

南方铁杉更新能力一直受到关注，且争议较大。基于江西武夷山自然保护区内南方铁杉群落30块固定样地的群落调查数据，运用二元指示种分析（ TWINSPAN）和去趋势典范对应分析（ DCCA）对南方铁杉群落进行数量分类，并对其更新能力定量评价与影响因子分析。结果表明：南方铁杉固定样地中共有植物210种，隶属68科112属，依据物种的重要值划分为11个群落类型；海拔、坡位等空间要素与土壤厚度、养分等土壤因子对群落分布均有影响，但土壤因子比空间要素的影响力大，前者单独影响力为37．73％，后者为15．48％，二者偶合效应为7．65％；南方铁杉在乔木层、灌木层均以落叶树占优势的群落中更新能力最强，在乔木层以常绿树而灌木层以落叶树为优势的群落中次之，在乔木层、灌木层都是常绿树占优势的群落中更新能力最弱。研究表明本区南方铁杉可与较多物种共存，形成复杂多样的植物群落；南方铁杉自身具有较好的更新能力，群落结构与物种组成是影响其更新能力的主要因素，常绿、耐荫植物增多、竹类植物入侵将大大地抑制南方铁杉的更新。因此，保护与恢复南方铁杉种群的有效办法是群落结构调整、增加通透度、防止竹类植物入侵等。
남방철삼경신능력일직수도관주，차쟁의교대。기우강서무이산자연보호구내남방철삼군락30괴고정양지적군락조사수거，운용이원지시충분석（ TWINSPAN）화거추세전범대응분석（ DCCA）대남방철삼군락진행수량분류，병대기경신능력정량평개여영향인자분석。결과표명：남방철삼고정양지중공유식물210충，대속68과112속，의거물충적중요치화분위11개군락류형；해발、파위등공간요소여토양후도、양분등토양인자대군락분포균유영향，단토양인자비공간요소적영향력대，전자단독영향력위37．73％，후자위15．48％，이자우합효응위7．65％；남방철삼재교목층、관목층균이락협수점우세적군락중경신능력최강，재교목층이상록수이관목층이락협수위우세적군락중차지，재교목층、관목층도시상록수점우세적군락중경신능력최약。연구표명본구남방철삼가여교다물충공존，형성복잡다양적식물군락；남방철삼자신구유교호적경신능력，군락결구여물충조성시영향기경신능력적주요인소，상록、내음식물증다、죽류식물입침장대대지억제남방철삼적경신。인차，보호여회복남방철삼충군적유효판법시군락결구조정、증가통투도、방지죽류식물입침등。
There have been some controversies over the issue about the natural regeneration of Tsuga tchekiangensis,a quantitative classification of T.tchekiangensis was conducted with the TWINSPAN and DCCA methods,and its population regeneration capacity was evaluated based on the systematic investigation of its communities in Jiangxi Wuyishan National Nature Reserve.The result showed that:(1) 30 permanent sample plots,with 210 plant species belonging to 68 families and 112 genera,could be divided into 11 types of commu?nity according to the species important value;(2) soil factors (depth,nutrient,etc ) had more effects on the spatial distribution of T.tchekiangensis community than spatial ones (elevation,slope position,etc ),the former contributed 41.94 %,the latter did 22.86 %,and their coupling contributed 7.65 %;(3) T.tchekiangensis re?generated best in these forests with deciduous species dominant in canopy and understory,followed by the for?ests with evergreen trees in canopy and deciduous trees in understory,and almost failed to regenerate in the for?ests with evergreen trees in canopy and understory.These findings indicate that T.tchekiangensis,a regenerative species,could exist with more tree species to form various communities, and the community composition and structure rather than spatial or soil factors determine the regeneration capacity of T.tchekiangensis.Dominance of evergreen and shade-tolerance trees,and invasion of bamboo are the main reasons for T. tchekiangensis to fail to regenerate.So,the effective measures required to protect and restore this rare species are to modify the struc?ture of communities in which T. tchekiangensis live under good light conditions for its seedlings and saplings, and to suppress invasion of bamboo.