杉木混交林林下植被多样性研究

Study on Understory Vegetation Diversity of Cunninghamia lanceolata Mixed Forest

以湖南省东台山国家森林公园的杉木纯林、杉木香樟混交林、杉木木荷混交林3种不同类型的杉木林以及阔叶混交林为研究对象,研究了杉木混交林的林下植被多样性。结果显示:4种模式中阔叶混交林的灌木层植物多样性最高,针阔混交林的灌木层多样性高于杉木纯林,总体而言2种针阔混交林中杉木香樟混交林林下灌木多样性丰富度、多样性和均匀度均高于杉木木荷混交林;4种林分的人工林草本层多样性呈现出杉木纯林高于混交林的趋势,杉木纯林最高,阔叶混交林最低,2种杉阔混交林中杉木香樟混交林高于杉木木荷混交林,人工林植物多样性总体趋势为灌木层>草本层。综合反映了杉木与香樟混交经营可促进杉木林林下植被的生长发育。

The understory vegetation diversity of Cunninghamia lanceolata forest,mixed Cunninghamia lanceolata and Cinnamomum camphora,as well as mixed Cunninghamia lanceolata and Schima superba in Dongtaishan National Forest Park of Hunan Province was studied.The results showed that the diversity of shrub layer in broadleaved mixed forests was the highest among the four models,and the diversity of shrub layer in mixed coniferous and broadleaved forests was higher than that in Cunninghamia lanceolata forest;in general,the richness,diversity and evenness of mixed Cunninghamia lanceolata and Cinnamomum camphora in two types of coniferous and broadleaved forests were higher than that in mixed Cunninghamia lanceolata and Schima superba;the diversity of herb layer in plantation forests of the four types of forests showed a trend of Cunninghamia lanceolata forest being higher than that of mixed forests,with the highest in Cunninghamia lanceolata forest forests,the lowest in broadleaved mixed forests,and the lowest in two types of fir mixed forests.The mixed forest of mixed Cunninghamia lanceolata and Cinnamomum camphora was higher than that of mixed Cunninghamia lanceolata and Schima superba.The overall trend of plantation forest plant diversity was that the shrub layer>herbaceous layer.The overall trend of plantation forest plant diversity was shrub layer>herb layer.This shows that the mixed management of Cunninghamia lanceolata and Cinnamomum camphora can promote the growth and development of understory vegetation in Cunninghamia lanceolata forests.