01867naa a2200325 a 450000100080000000500110000800800410001910000180006024501410007826000090021952009980022865000090122665000120123565000210124765000100126865000140127865000230129265000100131565000120132565000150133765000110135265000100136365000140137365300180138765300110140565300130141670000160142970000180144577300780146315221902023-06-01       1978    bl uuuu     u00u1 u    #d1 aQUIRKE, J. F.  aThe growth of pregnant female lambs and their progeny in relation to dietary protein and energy during pregnancy.h[electronic resource]  c1978  aOne hundred and twenty-eight Finnish Landrace X Galway female lambs, 40 kg liveweight and about 8 months old, were individually penned from between 5 and 6 weeks after mating until parturition. The experimental treatments applied during this period consisted of two levels of energy (8.0 and 12.0 MJ ME/day) with three levels of crude protein (110, 155 and 220 g/day) at each energy level. A series of nitrogen balance trials was carried out on six animals from each treatment during the final 90 days of gestation. One hundred and six females produced lambs at full term (1.61 lambs/ewe). Increasing protein intake from the low to intermediate level increased maternal liveweight gain, but there was no further response to the high level. There was a significant interaction between protein and energy with respect to lamb birth weight; at the lower energy level lamb birth weight tended to increase with increasing protein intake, but the opposite effect occurred at the higher energy level.  aEwes  aFemales  aGestation period  aLambs  aPregnancy  aRuminant nutrition  aSheep  aEnergia  aNutrição  aOvelha  aOvino  aProteína  aFoetal growth  aFoetus  aGestacao1 aSHEEHAN, W.1 aLAWLOR, M. J.  tIrish Journal of Agricultural Researchgv. 17, n. 1, p. 33-42, Apr. 1978.