Body composition at farrowing and nutrition during lactation affect the performance of primiparous sows: I. Voluntary feed intake, weight loss, and plasma metabolites.
Body composition at farrowing and nutrition during lactation affect the performance of primiparous sows: I. Voluntary feed intake, weight loss, and plasma metabolites.
复制标题
分娩时的身体成分和哺乳期的营养影响初产母猪的生产性能： I. 自愿采食量、体重减轻和血浆代谢物。
作者：
D. Revell;I. Williams;B. Mullan;J. Ranford;R. Smits
用35头初产母猪研究分娩时体脂与哺乳期自愿采食量(VFI)的关系。两组母猪在整个妊娠期间以不同的方式饲喂(2.3 kg/d饲喂含5.8%CP和14.6MJ DE/kg的日粮，或1.7 kg/d饲喂含15.6%CP和14.5MJ DE/kg的日粮)，以便它们在相似的体重(158-152 kg)开始哺乳，但体成分不同：340(脂肪)或280(瘦)g体脂/kg体重(P<；.001)。在哺乳期间，随机饲喂低蛋白日粮(7.9%CP和15.5MJ DE/kg)和高蛋白日粮(19.0%CP和15.6MJ DE/kg)。哺乳期间，每天测量VFI，每周测量母猪体重和背脂。分别于妊娠110d、哺乳期14d和28d采血，测定血浆NEFA、甘油、胰岛素、葡萄糖和β-羟丁酸的含量。在哺乳期，肥猪的摄食量比瘦肉母猪少30%(P<；.001)，这对应着血浆中NEFA浓度增加70%(P=.01)，甘油浓度增加30%(P=.15)。哺乳前2周的VFI只受体脂的影响，而不受哺乳日粮蛋白质含量的影响。在哺乳第3周和第4周，饲料中蛋白质的供应影响了VFI，可能是通过影响产奶量，从而影响消耗饲料的驱动力。在哺乳期间喂食高蛋白饮食可以最大限度地减少体重减轻，特别是瘦组织的减少(P<；.002)。
We used 35 primiparous sows to investigate the link between body fatness at farrowing and voluntary feed intake (VFI) during lactation. Two groups of sows were fed differently throughout gestation (either 2.3 kg/d of a diet containing 5.8% CP and 14.6 MJ DE/kg as fed or 1.7 kg/d of a diet containing 15.6% CP and 14.5 MJ DE/kg as fed) so that they commenced lactation at a similar body weight (158 to 152 kg) but with different body compositions: either 340 (fat) or 280 (lean) g of body fat/kg BW (P < .001). During lactation, sows were offered either a low-protein diet (7.9% CP and 15.5 MJ DE/kg as fed) or a high-protein diet (19.0% CP and 15.6 MJ DE/kg as fed) on an ad libitum basis. During lactation, VFI was measured daily, and sow body weight and backfat were measured weekly. Blood samples were collected from sows on d 110 of gestation and d 14 and 28 of lactation, and plasma was analyzed for NEFA, glycerol, insulin, glucose, and beta-hydroxybutyrate. Fat sows ate 30% less than their lean counterparts during lactation (P < .001), which corresponded to a 70% higher concentration of NEFA in plasma (P = .01) and a 30% higher concentration of glycerol (P = .15). The VFI during the first 2 wk of lactation was affected only by body fatness and not by the protein content of the lactation diet. The dietary supply of protein influenced VFI during wk 3 and 4 of lactation, possibly by affecting milk production and hence the drive to consume feed. Weight loss, particularly lean tissue loss, was minimized by feeding the high-protein diet during lactation (P < .002).
重新评估大脑胰岛素系统对肥胖和食欲的调节。
影响因子：
4.9
作者：
Woods,SC;FiglewiczLattemann,DP;Schwartz,MW;PorteJr,D
通讯作者：
PorteJr,D