摘要
采用促排卵素2号(LRH—A)、氯前列烯醇(ICI 80996)处理173头产后14—20d 的奶牛,探讨两种生殖激素对奶牛产犊间隔和其它繁殖力指标的影响。结果表明:两个处理组奶牛的产犊间隔分别为360.3±27.67d 和353.30±36.05d,明显少于对照组的394.73±63.32d(P<0.01)。两组分娩至第一次配种间隔分别为59.66±22.58d 和54.19±14.25d;分娩至受胎间隔分别为79.98±27.67d 和73.73±36.85d,均显著少于对照组的77.11±37.47d 和114.36±53.7d(P<0.01)。空怀时间在85d 以内的比率Ⅰ、Ⅱ组奶牛分别占60.00%和75.00%,显著高于对照组的41.50%(P<0.05,P<0.01)。产后150d 时的受胎率两组分别为95%和93.33%,显著高于对照组的71.69%(P<0.01)。
173 dairy cows during 14-20 days after parturition were used to investigate the effect of LRH—A and ICI80996 on the calving interval and other reproductivity parameters of cows.The result showed:1)The calving interval in two treatment groups(360.3±27.67 and 353.30±36.05 days,resp) was significantly shorter than that in control group(394.73±63.32 days).2)Interval from calving to first mating in two treatment groups(59.66±22.58 and 54.19±14.25 days,resp)and calving-service interval(79.98±26.67 and 73.73±36.85 days,resp)were significantly shorter than that in control group(77.47±37.47 and 114.36±53.27 days).The percentage of cows with barren time less than 85 days in two treatment groups(60.00% and 75.00%,resp)was significantly higher than that in the con- trol group(41.50%).4)The conception rate of cows at date 150 after calving in two treatment groups (95.00% and 93.33%,resp)was significantly higher than that in the control group(71.69%).
