摘要
以马宗岭林场栎类阔叶混交林下种植天麻的三种面积等级(0-55 m2、55-10 m2、>100 m2)林窗为研究对象,以距实验林窗 10 m以外的不做任何处理的栎类阔叶混交林作为对照(CK),分析种植天麻的不同面积等级林窗内植物组成和植物多样性差异.结果显示:种植天麻的林窗草本层和灌木层植物种类和数量低于林下对照组,但林窗内促进了禾本科和菊科等喜光植物生长;草本层的R、H′、D、Jsw均随林窗面积的增加呈现先增大后减小的变化趋势,在 55-100 m2 林窗处达到最大且R、H′、D均大于CK;对于灌木层,R、H′、D、Jsw在0-55 m2 林窗处最大且R、H′、Jsw 均大于CK.栎类阔叶混交林的林下植物多样性保护过程中,林窗种植天麻以中小面积尺度最为合适.
Abstract
In this study,three area grades(0-55m2,55-100m2,>100m2)of Gastrodia elata Bl were planted un-der the oak broad-leaved mixed forest in Mazongling Forest Farm,and the untreated oak broad-leaved mixed forest 10 m a-way from the experimental forest gap was used as the control(CK)to analyze the differences in plant composition and plant diversity in the forest gaps of different area grades planted with Gastrodia elata Bl.The results showed that the species and number of plants in the herbaceous layer and shrub layer of Gastrodia elata Bl were lower than those in the understory control group,but the growth of light-loving plants such as Poaceae and Asteraceae were promoted in the forest gap.The R,H′,D and Jsw of the herbaceous layer increased first and then decreased with the increase of the forest gap area,reaching the max-imum at 55-100 m2 forest gap,and R,H′ and D were all greater than CK.For the shrub layer,R,H′,D,Jsw were the largest at 0-55 m2,and R,H′,Jswand were all greater than CK.In the process of protecting the understory plant diversity of oak broad-leaved mixed forest,the small and medium-sized area scale is the most suitable for planting Gastrodia elata Bl in forest gaps.
维普
万方数据