Sun H Q, Tan C Q, Wei H K, Zou Y, Long G, Ao J T, Xue H X, Jiang S W, Peng J
Department of Animal Nutrition and Feed Science, College of Animal Science and Technology, Huazhong Agricultural University, Wuhan 430070, PR China.
Key Laboratory of Swine Breeding and Genetics of the Agricultural Ministry, College of Animal Science and Technology, Huazhong Agricultural University, Wuhan 430070, PR China.
Anim Reprod Sci. 2015 Jan;152:55-64. doi: 10.1016/j.anireprosci.2014.11.003. Epub 2014 Nov 14.
This study was conducted to investigate the effects of different amounts of konjac flour (KF) inclusion in the gestation diet on the physio-chemical properties of diets, postprandial satiety in pregnant sows, lactation feed intake of sows and piglet performance during two successive reproductive cycles. Multiparous Landrace sows (n=140) were assigned randomly to one of four experimental diets, and four gestation diets were formulated to contain varying amounts of KF at 0%, 0.6%, 1.2% or 2.2%, respectively. The water binding capacity (WBC) (P<0.01), swelling capacity (P<0.01) of gestation diets, the concentration of total short chain fatty acids (P<0.05) after in vitro fermentation of gestation diets increased linearly with increasing inclusion amounts of KF. During the second reproductive cycle, increasing dietary KF linearly increased plasma concentrations of short chain fatty acids (SCFA) 4h postprandial (P<0.05) and glucagon-like peptide (GLP-1) 2h postprandial (P<0.05), but decreased the plasma concentration of cortisol (linearly, P<0.05) 1h postprandial. In addition, there was a linear decrease of the non-feeding oral behavior of gestating sows (P<0.01) when dietary KF increased. There were linear increases in lactation feed intake of sows during entire lactation period (P<0.01) with increasing amounts of KF in the gestation diet. In addition, the number of piglets weaned (linearly, P<0.01; quadratic, P=0.01), average piglet weights and litter weights on day 21 of lactation (linearly, P<0.01) increased with increasing inclusion amounts of KF. In conclusion, inclusion of dietary fiber with great WBC, swelling capacity and fermentation capacity in the gestation diet was beneficial for enhancing postprandial satiety in pregnant sows, increasing lactation feed intake and improved number of piglets weaned per litter through greater pre-weaning survival.
本研究旨在探讨妊娠日粮中添加不同量魔芋粉（KF）对日粮理化性质、妊娠母猪餐后饱腹感、母猪泌乳期采食量以及两个连续繁殖周期仔猪生产性能的影响。将经产长白母猪（n = 140）随机分配到四种试验日粮中的一种，四种妊娠日粮分别配制为含0%、0.6%、1.2%或2.2%不同量的KF。妊娠日粮的水结合能力（WBC）（P<0.01）、膨胀能力（P<0.01）以及妊娠日粮体外发酵后的总短链脂肪酸浓度（P<0.05）均随KF添加量的增加呈线性增加。在第二个繁殖周期，增加日粮中的KF可使餐后4小时的短链脂肪酸（SCFA）血浆浓度线性增加（P<0.05），餐后2小时的胰高血糖素样肽（GLP - 1）血浆浓度线性增加（P<0.05），但餐后1小时的皮质醇血浆浓度呈线性下降（P<0.05）。此外，随着日粮中KF的增加，妊娠母猪的非采食口腔行为呈线性下降（P<0.01）。随着妊娠日粮中KF量的增加，母猪在整个泌乳期的采食量呈线性增加（P<0.01）。此外，断奶仔猪数（线性，P<0.01；二次曲线，P = 0.01）、泌乳第21天的仔猪平均体重和窝重（线性，P<0.01）均随KF添加量的增加而增加。总之，在妊娠日粮中添加具有高水结合能力、膨胀能力和发酵能力的膳食纤维，有利于增强妊娠母猪的餐后饱腹感，增加泌乳期采食量，并通过提高断奶前成活率来增加每窝断奶仔猪数。
