栽杉留阔模式群落区系特征研究

通过标准地调查 ,研究 2 9年生栽杉留阔模式及杉木纯林 (对照 )群落区系特征 ,结果表明 :栽杉留阔模式群落植物属和种组成数量 (10 2属、138种 )均大大超过杉木纯林群落 (87属、10 8种 ) ,具有生物多样性和更强的水土保持功能。其区系特征与杉木纯林相比有较大不同 ,群落间的相似性较小。栽杉留阔模式群落乔木层中落叶阔叶树种具有较大的重要值。栽杉留阔模式群落草本层以阳性种类为主 ,未发现观音座莲 ,而观音座莲是杉木纯林的指示植物。 2个群落种子植物属的分布区类型都是以热带成分为主 ,栽杉留阔模式群落属的热带分布比例小于杉木纯林

Studies on the Community Flora Characteristics of the Pattern of Planting Cunninghamia lanceolata and Leaving Broad - Leaved Trees

The results show that the community plant genera and species composition numbers (102 genus,138 species )of the pattern of planting Cunninghamia lanceolata and leaving broadleaved trees all greatly exceed those (87 genus,108 species) of C.lanceolata pure forests.This pattern possesses biodiversity and stronger water and soil conservation function, the flora characteristics of it have an relatively big difference with those of C.lanceolata pure forests,the comparability between communities is small.The deciduous broad leaved tree species in the community arbor layer of the pattern possess relatively big important value.The community field layer of the pattern is mainly composed of light demanding species,Angiopteris fokiensis is not found,whereas it is the indicator plant of C.lanceolata pure forests.The distribution area types of seed plant genus of 2 communities are all mainly composed of tropical components.The tropical distributive proportion of community genus of the pattern is smaller than that of C.lanceolata pure forests.