Hoppe M K, Libal G W, Wahlstrom R C
Dept. of Anim. and Range Sci., South Dakota State University, Brookings 57007.
J Anim Sci. 1990 Aug;68(8):2235-42. doi: 10.2527/1990.6882235x.
Sixty-four Large White x Landrace primiparous sows were utilized to evaluate the influence of feeding 6 vs 9 Mcal ME/d during gestation on reproductive performance. The sows remained on their respective gestation diets for four parities if they successfully farrowed, rebred and conceived. Sows fed 9 Mcal ME/d gained more weight (P less than .05) through the gestation period during parities 1 and 2 and were heavier (P less than .01) on d 110 of gestation for combined parities. Lactation weight loss was greater (P less than .05) for the sows fed 9 Mcal ME/d, resulting in similar weights at weaning. Ultrasonic backfat measurements were greater (P less than .01) on d 110 of gestation for sows fed 9 Mcal ME/d during parity 1 and remained higher (P less than .01) through the fourth-parity gestation. Although sow weaning weights were similar, sows receiving 6 Mcal ME/d scanned less backfat thickness. Gestation treatment significantly affected consumption of a common lactation diet provided ad libitum. Sows fed 6 Mcal ME/d during gestation consumed an average of 22 kg more feed (P less than .01) during lactation than those sows receiving 9 Mcal ME/d. Litter performance as measured by number and weights of pigs born alive and weaned was not altered (P greater than .10) by gestation energy intake. Days to return to estrus and the number of sows remaining in the study for four parities were similar (P greater than .10) between the two treatment groups. The number of farrowings for the four parities totaled 164, with 83 and 81 farrowings for the sows fed 6 and 9 Mcal ME/d, respectively.(ABSTRACT TRUNCATED AT 250 WORDS)
64头大白猪与长白猪杂交的初产母猪用于评估妊娠期饲喂6或9兆卡代谢能/天对繁殖性能的影响。如果母猪成功产仔、再配种并受孕，它们将在四个胎次中一直采用各自的妊娠期日粮。在第1和第2胎次的妊娠期内，饲喂9兆卡代谢能/天的母猪体重增加更多（P<0.05），且在合并胎次的妊娠期第110天时体重更重（P<0.01）。饲喂9兆卡代谢能/天的母猪哺乳期体重损失更大（P<0.05），导致断奶时体重相似。在第1胎次妊娠期第110天时，饲喂9兆卡代谢能/天的母猪超声背膘测量值更高（P<0.01），并且在第4胎次妊娠期内一直保持较高水平（P<0.01）。尽管母猪断奶体重相似，但接受6兆卡代谢能/天的母猪背膘厚度扫描值较低。妊娠期处理显著影响随意提供的普通哺乳期日粮的采食量。妊娠期饲喂6兆卡代谢能/天的母猪在哺乳期平均比接受9兆卡代谢能/天的母猪多消耗22千克饲料（P<0.01）。以出生存活和断奶仔猪数量及体重衡量的窝性能不受妊娠期能量摄入量的影响（P>0.10）。两个处理组之间，发情返情天数和留在研究中至四个胎次的母猪数量相似（P>0.10）。四个胎次的产仔总数为164窝，饲喂6和9兆卡代谢能/天的母猪分别产仔83窝和81窝。（摘要截短为250字）
