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测定了鼠害剪株分布型，发现剪株的分布均属聚集型，高密度下聚集原因主要是鼠类本身习性所为，低密度下是环境与鼠类本身行为两因素作用结果。鼠害一般产量损失调查可用ｎ＝２６．３４／ｘ＋７．５８进行抽样，产量损失率（剪株率）可用公式ｙ＝０．０６３７＋０．６８３０ｘ来计算。防治指标为６．２％上夹率
The distribution pattern of the rat cuttings was determined and the distribution of the cuttings was found to be aggregated. The reason for the accumulation was mainly the habit of the mice themselves under low density, which was the result of two factors. The general yield loss investigation of rodents can be sampled with n = 26.34 / x + 7.58. The yield loss rate (crop strain rate) can be calculated by the formula y = 0.0637 + 0.6830x. Control index of 6.2% on the clip rate