洞庭湖区防鼠墙对东方田鼠防治效果调查

A survey on effect of the rodent-proof wall for controlling Microtus fortis in Dongting Lake area

东方田鼠(Microtus fortis Buechner)是洞庭湖区重要的害鼠种类,在数量暴发年份,在由湖滩被迫迁入农田过程中会对农作物造成毁灭性的危害,因此修筑防鼠墙以阻断迁移通路是最为有效的防治手段。为了解防鼠墙的防治效果,在2012年4月和7月分别在湖滩和对应的堤内农田进行调查。结果有防鼠墙的堤垸内农田的东方田鼠密度为0.52%,明显低于经过人工捕杀和药物灭鼠后无防鼠墙的农田1.76%(χ2=3.900,P=0.048);迁入农田后的密度下降幅度为98.53%,明显高于无防鼠墙堤垸的86.61%(χ2=11.060,P=0.01)。充分显示了防鼠墙防治效果,因此建议大力推广。

The oriental vole （Microtus fortis Buechner） was an agricultural pest in Dongting Lake area, and once（1.76%） in farmland without rodent-proof wall after the voles has immigrated into farmland from the adjacent beaches. Compared to the population density in beaches, the decrease rate （98.53%） of population density in farmland with rodent-proof wall was significantly （ X^2= 11. 060, P=0.01 ） higher than that （86.61% ） in farmland without rodent-proof wall, in spite of the deratization by farmer in the unprotected polder. So it was suggested to promote rodent-proof wall along the dike in Dongting Lake area to limit crop damage.