关键词: 棕背, 不同坡度林地, 预防, 幼林鼠害, 林业生态

Abstract: The vole (Clethrionomys rufocanws), is a dominant species in Heilung-jiang forest region. It gnaws bark in winter and does harm to the artificial young forest. Investigations show that the degree of harm depeuds on the nmber of voles in habitats of different slopes which may be divided into 4 types, ( 1) sedgy steep slope, with a gradiant of 25 (2) gentle slope with weeds with a gradiant of about 10° (3) level land about 5° (4) low-lying land. There are more voles in the level land than on the steep slope.In aforestation we should select lands with suitable slopes to plant trees which should also be selected the ones not palatable to the voles. It is better to know the number of the voles on different slopes at the end of autumn, in order to predict the spots of possible damage occurence and to take controlling measures.

Key words: 鼠平, Large-toothed rad-backed-vole, Clethrionomys rufocanus, On different slopes of forest land, Prevention, Harm of rodents in young forest, Forest ecology