伊拉母兔带仔数与季节变化对其受胎率的影响
Effect of Litters and Season on Pregnancy Rate in Hyla Rabbit

为提高伊拉兔工厂化生产的繁殖效率，随机选取某兔场2 334 只母兔，分为3 组，带仔数分别设定7、8 、9，测定受胎率；同时对该场15 000 只母兔不同月份和季节的受胎率进行统计分析。结果表明，带仔数7 和 8 的母兔受胎率分别为74.48% 和73.36%，差异不显著，而带仔数9 的母兔受胎率为52.56%，显著低于带仔数7、8的母兔；冬、春季母兔受胎率分别为74.39%和 74.49%，均略高于夏秋季（72.63%，72.10%），但差异不显著；在各月份中，每年4 月是母兔受胎率最高的季节，达76.63%，显著高于10 月的69.11%。综上，为保证集约化养殖中伊拉兔受胎率，建议母兔的适宜带仔数为 8，同时要加强夏、秋季配种管理。
In order to improve the breeding efficiency of Hyla rabbit in farm, 2 334 rabbits were randomly selected and divided into three groups with 7, 8, and 9 suckling litters respectively, and the percentage of pregnancy rabbit was counted. All the data of pregnancy rate from 15 000 female rabbits in the same farm was also analyzed based on month and season. The results showed that there was similar pregnancy percentage in the group of rabbit with 7 or 8 suckling litters(74.48% and 73.36%). However, there was a 52.56% pregnancy rate in the group of rabbit with 9 suckling litters, which was significantly lower than that of 7 and 8 litters. In the spring and winter, the pregnancy rate of rabbit were 74.39% and 74.49%, respectively, which was higher than that of in summer and autumn(72.63%，72.10%). The highest pregnancy rate in April(76.63%) and the lowest in October(69.11%) were founded in the farm. Based on the data above, we suggested that to obtain the best pregnancy rate of Hyla rabbit in the farm, the number of suckling litters is 8, and it should be enhanced the management of rabbit breeding in summer and autumn.