开远市原生植被类型的垂直分布状况调查

通过对开远市不同海拔高度原生植被类型状况的设样调查,得出开远市原生植被的垂直分布规律为:海拔高度1 500 m以下分布着以毛叶青冈为代表的偏干性季风常绿阔叶林、细叶云南松林;海拔高度1 500~2 000 m生长有元江栲、银木荷湿性常绿阔叶林、云南松林;而海拔高度2 000 m以上为红花荷、黄丹木姜子群落及光叶石栎群落组成的中山湿性常绿阔叶林。而在海拔高度1 100~1 200 m干热河谷地带分布的铁橡栎、清香木群落不作该地的代表类型。结合垂直分布规律,对除细叶云南松林外的6种植被类型的物种分层结构特征作了论述。

An Investigation on Vertical Distribution of Native Vegetation of Kaiyuan City

Using the method of sample plot survey,the native vegetation of Kaiyuan city distributed at different altitudes were investigated.The vertical distribution law of native vegetation in Kaiyuan city was summarized.At areas with the altitude lower than 1500 m,the vegetation are dry monsoon evergreen broad-leaved forest with the Cyclobalanopsis kerrii as the representative species and Pinus yunnanensis var.tenuifolia forest.From 1500 m to 2000 m,the vegetation are humid evergreen broad-leaved forest with the Castanopsis orthancantha and Schima argentea as the representative species and Pinus yunnanensis forest.At the areas with the altitude higher than 2000 m,the vegetation is mid-montane moist evergreen broad-leaved forest,and the main species are Rhodoleia parvipetala,Litsea elongata and Lithocarpus mairei.Combing with the vertical distribution law,the layer structure characteristics of six vegetation types except Pinus yunnanensis var.tenuifolia were described.