不同光照时间对初配獭兔繁殖性能的影响

Effect of Different Photoperiod on Reproductive Performance of the Female Rex Rabbits of First Mating

为探讨光照时间对初配母兔繁殖性能的影响,随机选择165日龄左右、体重相近、健康状况良好的后备母兔400只,随机分为4组,每组5个重复,每个重复20只獭兔。对照组采用自然光照,试验1、2、3组分别人工补充光照至14h、16h、18h,光照强度为55~80 Lux。结果显示:在本试验条件下,光照时间为14h、16h、18h时,发情率均显著高于自然光照(P<0.01);光照14h时,受胎率显著高于自然光照(P<0.05),16h与18h也有所提高(P>0.05);光照时间为14h与16h时均能显著提高獭兔的窝产仔数(P<0.01),18h相对于自然光照无显著差异(P>0.05)。综合以上指标,初配母兔每天光照时间为14~16h,繁殖性能最优。

This experiment is conducted to investigate the effects of light time on reproductive performance of fe-male Rex Rabbits of first mating.Four hundred healthy Rex rabbits at the aged about 165 days and weighing ap-proximately the same size were randomly divided into 4 groups with 5 replicates per group and 20 rabbit per repli-cate.The control group was treated with natural lighting.In the experimental group 1, 2 and 3, artificial light wasadded to 14 h, 16 h and 18 h respectively,and the light intensity was 55~80 lux.The results showed as follows： Inthis experiment,the rate of estrus in each experimental group was significantly higher than that of the controlgroup（P〈0.01）.In experiment group 1,conception rate was significantly higher than the control group（P〈0.05）,theexperimental group 2 and 3 were also higher than the control group（P〉0.05）.In experiment group 1 and 2,littersize were significantly higher than the control group（P〈0.01）,but there was no significant difference between thethe experimental group 3 and the control group.Comprehensive consideration,when light time is 14-16 h, the re-productive performance of female Rex Rabbits of first mating is the best.