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在母猪妊娠、哺乳期和其仔猪断奶后保育阶段饲喂活酵母添加物对仔猪生长性能和营养物质消化率的影响
发布单位:凯发网站
查看次数：8536
时间：2019-05-15
Hang Lu，Pete Wilcock，Olayiwola Adeola，Kolapo M Ajuwon
翻译：刘素利
本研究的目的是确定在母猪妊娠期和泌乳期以及其后代保育阶段饲喂活酵母（LY）添加物，对其后代断奶后生长性能和营养物质消化率的影响。选取40头母猪，根据胎次和预产期，随机分为两个日粮处理组（对照组和LY组）；记录仔猪初生重、断奶重和窝仔数、死亡率等数据。断奶后，128头混合性别的仔猪（每个母猪试验组选取64头）根据来源和初始体重各自随机分为两个试验组（对照组和LY组），每圈4头猪（每个处理32头猪），进行为期6周的生长性能试验。在此生长性能试验结束时，每圈选择2头猪只转移到代谢笼里采集粪样，进行代谢试验。
试验数据显示，在母猪日粮中添加LY组：其仔猪初生重、断奶重和窝产仔数和死亡率无显著变化；在仔猪断奶后21d和42d时，猪只体重（BW）显著增加；总体平均日增重（ADG）显著升高（P＜0.05）。在母猪和仔猪保育日粮中均添加LY组，仔猪整体平均日采食量（ADFI）和饲料转化率（G：F）无显著差异。在保育料中添加LY，改善了保育阶段仔猪对饲料干物质（DM）、总能（GE）和磷（P）的表观总消化率（ATTD）。在母猪料中添加LY，其仔猪对饲料GE的ATTD也同样增加了。
总而言之，在母猪妊娠、哺乳阶段和仔猪保育阶段日粮中添加LY，可以改善其后代仔猪对饲料DM、GE和P的ATTD及ADG，而且可能对其一生的生长性能都有改善作用。
Effect of live yeast supplementation to gestating sows and nursery piglets on postweaning growth performance and nutrient digestibility
The objectives of the current study were to determine the effects of live yeast (LY) supplementation of sows during gestation and lactation and to determine the effects of supplementation of their offspring after weaning on growth performance and nutrient digestibility. A total of 40 sows were assigned to two dietary treatments (control vs. LY) based on parity and expected farrowing date. Birth weight, weaning weight, litter size and mortality were measured. After weaning, 128 mixed-sex piglets (64 from each sow treatment) were selected based on their source litter and initial BW, and randomly assigned to 2 treatments (control or LY) at 4 pigs per pen (total of 32 pigs per treatment) for a 6-wk growth performance study. At the end of the growth performance trial, 2 barrows from each pen were moved to metabolism crates for total fecal collection for a digestibility trial. Addition of LY to the sow diets had no effects on birth weight, weaning weight, litter size at birth and mortality. Piglets had greater body weight (BW) on d 21 and 42 postweaning when sows were fed diets supplemented with LY, and overall average daily gain (ADG) was greater in piglets from sows that received LY (P < 0.05). There was no effect of sow and nursery diets on overall average daily feed intake (ADFI) and gain : feed intake (G:F). Supplementing diets with LY during the nursery phase increased apparent total tract digestibility (ATTD) of dry matter (DM), gross energy (GE) and phosphorus (P) during this phase. The ATTD of GE was also greater in piglets from sows that received LY. In conclusion, LY supplementation of diets during gestation and lactation and during the nursery phase could increase ADG and ATTD of DM, GE and P in the offspring, and this may lead to a greater lifetime growth performance in the offspring.
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