不同添加水平酵母培养物对母猪繁殖性能、窝仔猪生长性能的影响

The effects of yeast culture at different doses on the productive performance of sows and litter performance

试验目的是探讨在母猪一个繁殖期内饲喂不同水平的酵母培养物对母猪繁殖性能和仔猪生长性能的影响。选取60头品种相同,胎次接近的纯种妊娠母猪,随机分成3个处理组:对照组,低水平酵母培养物组(妊娠期添加3 kg,哺乳期添加5 kg),高水平酵母培养物组(妊娠期添加5 kg,哺乳期添加8 kg),每组20头母猪。饲喂试验从母猪确认妊娠开始到母猪断奶再发情结束,记录和测定母猪的生产性能、血清生化指标和免疫性能。试验结果表明,低水平和高水平酵母培养物组都显著提高了母猪哺乳期的采食量,与对照组相比,分别提高了6.57%和9.11%。高水平酵母培养物组极显著提高了断奶窝重和平均窝增重,与对照组相比,分别提高了19.20%和23.48%。低水平和高水平酵母培养物组都显著降低了母猪断奶再发情天数,与对照组相比,分别减少了0.5 d和0.7 d。高水平酵母培养物组显著(P<0.05)提高了血清和初乳中猪瘟抗体水平,低水平酵母培养物组显著(P<0.05)提高了血清和初乳中蓝耳抗体水平。通过本试验,作者认为,酵母培养物可以提高哺乳期仔猪的增重,增加断奶窝重,主要是由于酵母培养物改善了母猪的健康度,并提高了哺乳母猪的采食量,改善了母猪的产奶性能。

Sows （n=60） were used to determine the effects of dietary yeast culture （YC, Enhalor Bioyeaster ） on sow and litter performance in three treatments： ① no added YC, ② 3 and 5 g/kg YC, and ③ 5 and 8 g/kg YC during gestation and lactation, respectively. Sows were fed 2.0 kg/d during gestation and ad Iibitum during lactation. Voluntary feed intake was measured daily during lactation. At farrowing, numbers of pigs born total and alive were measured. Weights of litters were measured at birth and weaning on d 21 of lactation. Average birth weight and litter size were not different between treat- ments. Sows fed with lower or higher of YC had increased feed intake by 6.57% and 9.11% compared with sows in the control treatment. Sows in the 5 and 8 g/kg YC treatment had increased total litter weaning weight and litter BW gain by 19.21% and 23.96% compared with sows in the control treatment. Sows fed with lower or higher of YC had fewer （P〈O.05） days return to estrus by 0.5 and 0.7 days respectively compared with the control sows. Sows fed with higher of YC had improved （P〈0.05） swine fever virus antibody titer in serum and colostrum, and sows fed with lower of YC had improved （P〈0.05） PRRS antibody titer in serum and colostrum. This study indicates that adding the YC in the gestation and lactation diets has the potential to improve litter BW gain during lactation, possibly by improving the health and the feed intake of lacta- tion sows.