| Abstract: | The present paper described the border line of vegetation regions of Xinganling Mts. in China. The border line between the larch (Larix dahurica) forest region and pine (Pinus koraiensis) broalleaved mixed forest region determined according to the materials of survey of field work are Aihui-Naheko-Menluhe. The main reasons for the line are as follows: (1) pine broal-leaved mixed forest as the zonal vegetation of lesser Xinganling Mrs. is mainly covering in the south of the line, but Oak (Quereus mongolica)-larch forest in the north of the line; (2) Though Oak forest is widely distributed in both the south and the north of the line, there are well-marked differences in constitutions, structures, originations as well as growth between them; (3) differences in floristic compositions between the south and the north of the line; (4) different artificial vegetation between to regions. Such differences are caused by climatic, earth elevation and glacial activity, etc. |
