西南林业大学学报2024，Vol.44Issue(3)：60-68,9.DOI:10.11929/j.swfu.202303070
林分密度对马尾松人工林群落冠层结构及林下草本的影响
Effects of Stand Density on Canopy Structure and Understory Herbs of Pinus massoniana Plantation Community
摘要
Abstract
To investigate the effects of stand density on the crown structure and understory vegetation of 25-year-old Pinus massoniana plantation,experimental plots with different planting densities were selected in Zhen-long Forest Farm,Hengzhou City,Guangxi Zhuang Autonomous Region.Single-factor analysis of variance(one-way ANOVA),Pearson correlation analysis,and redundancy analysis were employed to explore the influence of stand density on the growth,crown structure,and understory herbaceous diversity of P.massoniana.The results are as follows the stand density was in 2500 trees/ha-1-6000 trees/ha-1.With the increase of planting density,the canopy structure LAI of P.massoniana plantation community increased first and then remained unchanged,and gradually stabilized at DS2(3 300 trees/ha-1).The scattered radiation and direct radiation of understory illumina-tion were suitable for DS2.The understory herbaceous diversity indices,including the Simpson index,Shannon-Wiener index,Pielou evenness index,and Patrick index,showed no significant changes with variations in stand density in the P.massoniana plantation.However,there was a highly significant negative correlation between canopy openness of the community crown layer and the Shannon-Wiener diversity index of understory herb-aceous vegetation.In summary,the canopy structure of P.massoniana plantation community was better under the stand density of 3 300 trees/ha-1,and the scattered radiation and direct radiation under the forest were conducive to the maintenance of undergrowth vegetation diversity,which was the reasonable forest density of P.massoniana plantations.关键词
马尾松/林分密度/冠层结构/多样性/光环境Key words
Pinus massoniana/stand density/canopy structure/diversity/understory illumination分类
农业科技引用本文复制引用
李登醒,杨章旗,颜培栋,零天旺,覃富健,李鹏..林分密度对马尾松人工林群落冠层结构及林下草本的影响[J].西南林业大学学报,2024,44(3):60-68,9.基金项目
"十三五"重点研发项目(2017YFD0600303,2017YFD060030202)资助 （2017YFD0600303,2017YFD060030202）
广西科技基地和人才专项(桂科AD19254004)资助 （桂科AD19254004）
广西八桂学者专项(2019A026)资助 （2019A026）
广西科技重大专项(桂AA17204087-4)资助. （桂AA17204087-4）
