调查农田害鼠种群密度,是鼠害防制工作的重要基础。通常采用的方法是:以县为单位,选定3个以上不同农业区划(即生境),分设样方10公顷,布夹100只,测定捕鼠率,并计算平均值。因此法只是各生境样方捕鼠率的简单算术平均,故实际应用易出偏差。针对这一问题,笔者试用加权法 Investigation of farmland rat population density, rodent control is an important foundation. The commonly used method is to select three or more different agricultural divisions (ie habitat) by county, divide 10 hectares of sample plots and 100 cloth clippings, determine the rat catch rate and calculate the average value. Therefore, the law is only a simple arithmetic average of the trapping rate of the various habitat quadrats, so the practical application is easy to deviate from the deviation. In response to this problem, I try the weighted method