金沟岭林场混交林TWINSPAN分类及演替序列分析

Classification and succession analysis of mixed forest in Jingouling forest farm using the TWINSPAN method

采用TWINSPAN分类方法,对吉林金沟岭林场混交林进行了数量分类,并分析了混交林演替规律。结果表明:利用该方法可将研究区域混交林分为7种森林类型,其分布特点是从白杨榆杂阔叶混交林到云冷杉红松混交林的面积比例逐渐增大,其中所占比例最大的是云冷红-椴枫色针阔混交林,其次是云冷红-白杨枫椴针阔混交林,这两类混交林合计比例为55.4%,该区的顶极群落——阔叶红松林所占比例仅为8.4%。说明云冷杉红松针阔混交林是金沟岭林场的主要森林类型。演替规律分析表明,7种混交林类型呈现出明显的演替特征。总的趋势是先锋树种由强变弱,伴生树种和针叶顶极树种由弱变强,呈后来者居上的趋势,最终将形成具有稳定树种组成结构的阔叶红松林。

In this paper, the TWINSPAN classification method was used to quantitatively classify mixed forest in Jingouling forest farm. Then the classification results was used to analyze succession law of mixed forest. The mixed forest of the farm was divided into seven types with characteristics of area proportion increased gradually. The proportion of mixed conifer and broadleaf forest of Picea sp. , Abies sp. , P. koruiensis, Tilia sp. , B. costata and Acer sp. was the highest, the second was mixed conifer and broadleaf forest of Picea sp. , Abies sp. , P. koraiensis, B. platyphylla, Populus sp. , B. costata and Tilia sp.. The proportion of these two types was 55.4% of total. It showed that mixed conifer and broadleaf forest of Picea sp. , Abies sp. , and P. koraiensis was main forest type in the farm. The proportion of mixed forest of broadleaf and P. koraiensis, the climax community Of this region was only 8.4%. Succession law analysis indicated that succession characteristics of seven types were distinctive. The total trends were that pioneer tree species changed from puniness to mightiness, associated tree species and climax conifer tree species changed from mightiness to puniness. It well formed mixed forest of broad-leaved tree and Korean pine with steady tree species structure finally. The results showed that using TWINSPAN method to classify and sort mixed forest was feasible.