对褐家鼠消化道长度和重量的季节变化进行了研究．结果表明：褐家鼠消化道形态季节差异不明显，只有小肠的鲜重、大肠的长度和鲜重及盲肠的长度冬季明显高于其他季节．低温是引起消化道形态变化的主要胁迫因子 Seasonal changes in digestive tract length and weight in Rattus norvegicus were studied. The results showed that there was no significant difference in seasonal morphology of the digestive tract of Rattus norvegicus. Only the fresh weight of the small intestine, the length of the large intestine, the fresh weight and the length of the cecum were significantly higher in winter than in other seasons. Low temperature is the main stress factor that causes changes in digestive tract morphology