鲁西黄泛平原毛白杨林林分结构对林下草本植物多样性的影响  

Effects of Stand Structure of Woolly Populus tomentosa Forest on Understory Herb Diversity in Luxi Yellow River Flood Plain

作　　者：韩学娇 杨雨薇 何宝辉 路兴慧 孙天旭 HAN Xue-jiao;YANG Yu-wei;HE Bao-hui;LU Xing-hui;SUN Tian-xu(Liaocheng University,Liaocheng 252000,China;Shandong Territorial Spatial Planning Institute,Jinan 250014,China)

机构地区：[1]聊城大学,山东聊城252000 [2]山东省国土空间规划院,山东济南250014

出　　处：《山东农业大学学报（自然科学版）》2023年第4期605-612,共8页Journal of Shandong Agricultural University：Natural Science Edition

基　　金：聊城市重点研发计划(2021GY01);国家自然科学基金(31901210):聊城大学风景园林强特色学科建设(319462212)。

摘　　要：本文以鲁西黄泛平原毛白杨人工林林下草本植物为研究对象,基于14个标准样地的实测数据,研究林分密度、林龄、平均树高、平均胸径对林下草本植物多样性的影响。结果显示:(1)共记录有林下草本植物12科15属15种,优势科为菊科(Compositae)和禾本科(Gramineae),葎草(Humulusscandens)、狗尾草(Setariaviridis)是优势种;(2)各林分结构对多样性指数的影响均呈波动性变化。(3)Pearson相关分析和多元逐步回归分析得出,林分密度与Shannon指数、Simpson指数、PIE指数、Margalef指数均显著正相关(P<0.05),平均胸径、林龄、平均树高均与Pielou指数显著负相关(P<0.05)。对林下草本植物多样性起决定作用的林分结构为林分密度、平均胸径与林龄。综上,林分密度、平均胸径、林龄是影响林下草本植物多样性的主要因素,平均树高为次要因素。维持合理的林分结构是提升林下草本植物多样性的有效途径。Based on the measured data of 14 standard plots,the effects of stand density,age,average tree height and average diameter at breast height on the understory herb diversity of Populus populus plantation in Luxi Yellow River flood plain were studied.The results showed that:(1)There were 15 species of understory herbs in 12 families,15 genera,and the dominant families were Compositae and Gramineae.Humulus scandens and Setaria viridis were the dominant species.(2)The influence of each stand structure on the diversity index was fluctuating.(3)Pearson correlation analysis and multiple step regression analysis showed that stand density was significantly positively correlated with Shannon index,Simpson index,PIE index and Margalef index(P<0.05),while mean breast diameter,forest age and average tree height were significantly negatively correlated with Pielou index(P<0.05).The stand structures that determine the diversity of understory herbaceous plants are stand density,mean breast diameter and forest age.In conclusion,stand density,average breast diameter and forest age were the main factors affecting the diversity of herbaceous plants under the forest,and the average tree height was the secondary factor.Maintaining a reasonable stand structure is an effective way to enhance the diversity of understory herbaceous plants.

关 键 词：毛白杨 林分结构 树木生态 

分 类 号：S718.45[农业科学—林学]