云顶山柏木人工林林分密度对林下植物群落的影响  

Effect of Stand Density on Cupressus Funebris Plantation in Yunding Mountain

作　　者：吴茜 邓竣方 陈宏志 潘业田 罗玉祥 屈克炎 曾雄 WU Qian;DENG Jun-fang;CHEN Hong-zhi;PAN Ye-tian;LUO Yu-xiang;QU Ke-yan;ZENG Xiong(Sichuan Forestry and Grassland Survey and Planning Institute,Chengdu 610081,China;Gale top national nature reserve,Mabian Yi Autonomous County,Leshan 614000,China)

机构地区：[1]四川省林业和草原调查规划院,四川成都610081 [2]四川马边大风顶国家级自然保护区保护中心,四川乐山614000

出　　处：《四川林勘设计》2024年第1期5-12,共8页Sichuan Forestry Exploration and Design

基　　金：四川典型人工林森林生态系统质量评估指标体系(LGKT202303)。

摘　　要：为研究不同林分密度对柏木人工林植物群落的影响,本研究采取典型抽样法,基于重要值、方差比率法、联结系数等测度方法,调查分析云顶山5种现存密度柏木人工林生长状态,及其林下植被优势种的种间关联性。结果表明:在密度A、B、E时,柏木人工林的平均树高和胸径均相对较大,且差异不显著;本区林下植被共有草本植物38科72属95种,灌木42科65属97种,物种数量随密度的增加呈先增后减的趋势,在密度B时物种数达到峰值;不同林分密度的柏木人工林林下植被的方差比率差异较大,在密度B时,草本层与灌木层优势种的总体关联性均为正相关。研究表明密度B的柏木人工林为现存相对最优密度,不仅柏木人工林生长状态良好,且其林下植被优势种间的联结性好,竞争小。In order to study the effects of different stand densities on plant communities of cypress plantations,the growth status of five existing density cypress plantations in Yunding Mountain were investigated and analyzed in this study,including the interspecific relationships of the dominant species of understory vegetation by using the typical sampling method and the measurement methods of importance value,variance ratio method and association coefficient.The results showed that the mean tree height and DBH of cypress plantation were relatively large at density A,B and E,and the difference was not significant.There were 95 species of herbaceous plants in 38 families,72 genera,and 97 species of shrubs in 42 families,65 genera.The species number increased first and then decreased with the increase of density,and reached the peak at density B.The variance ratio of understory vegetation in cypress plantations with different stand densities were significantly different.At density B,the overall correlation between the dominant species in herbaceous layer and shrub layer was positive.Therefore,this study showed that the cypress plantation with density B was the relative optimal density in existence,and not only the growth state of the cypress plantation was good,but also the association between the dominant species of the understory vegetation was good and the competition was small.

关 键 词：林分密度 柏木人工林 优势种 种间关联 

分 类 号：S718.5[农业科学—林学]