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油松是忻州黄土丘陵区造林的主要树种,近年来,由于受中华鼢鼠严重危害,幼林成片死亡,成活率逐年下降。例如,1982年偏关县楼里背油松林地平均每亩有鼠2—2.5只,受害死亡株率高达87%。此外,鼢鼠对林地及其植被破坏也很严重,常导致地埂塌方、表土流失。因此,消灭鼠害已成为当前林业生产和“三北”防护林建设的一项紧迫任务。我们于1982—1985年在偏关县明灯山、水泉乡等林场,对鼢鼠进行了野外调查、室内饲养和防治试验。研究结果如下:
Pinus tabulaeformis is the main tree species afforestation in loess hilly region in Xinzhou. In recent years, the survival rate of young Chinese forest is declining year by year due to the severe damage of Chinese zokor tree. For example, in 1982, the average length of the Pinus tabulaeformis forest in Piao County was 2-2.5 per acre, with a mortality rate of 87%. In addition, the zokor damage to woodlands and their vegetation is also very serious, often lead to landslides, topsoil loss. Therefore, the elimination of rodent pests has become an urgent task for the current forestry production and the construction of the “Three Norths” shelterbelt. From 1982 to 1985, we conducted field surveys, indoor rearing and control experiments on zokor farms in Mingguangshan and Shuimquan townships in PiaoGuan county. The results are as follows: