Study on Plant Diversity in Forest Gaps Planted with Gastrodia Elata Bl in the Understory of Oak Broad-leaved Mixed Forest
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.
Oak broad-leaved mixed forestForest gapGastrodia elata BlPlant diversity
万方数据
维普
