1995
DOI: 10.1017/s0308229600028506
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Effect of fish meal supplementation on body energy mobilization and milk production of ewes in negative energy balance

Abstract: Protein supplementation has a positive effect on milk production, particularly in ewes on negative energy balance (Gonzalez et al., 1985). The response has been associated either to an increase in the movilization of body reserves (Whitelaw et al., 1986, Hadjipanayotou et al., 1988) or to an enhanced efficiency of energy utilization for milk synthesis. On the other hand, the response has been shown to be higher with fish meal than with other protein sources (Oldham, 1984). This work aimed to study the mecanism… Show more

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“…Ewes can use excess protein in the diet as a source of energy, but doing so increases the costs of the synthesis and excretion of urine, which is unfavourable to the animal's energy balance. Furthermore, lactating cows (Ørskov et al 1987) and ewes (Castrillo et al 1995) can increase body fat mobilisation after consuming undegradable dietary protein. Those factors might have contributed to the reduction in the performance of the ewes in the HP group, although milk composition and yield were unaffected by differences in CP intake.…”
Section: Milk Yield and Liveweightmentioning
confidence: 99%
“…Ewes can use excess protein in the diet as a source of energy, but doing so increases the costs of the synthesis and excretion of urine, which is unfavourable to the animal's energy balance. Furthermore, lactating cows (Ørskov et al 1987) and ewes (Castrillo et al 1995) can increase body fat mobilisation after consuming undegradable dietary protein. Those factors might have contributed to the reduction in the performance of the ewes in the HP group, although milk composition and yield were unaffected by differences in CP intake.…”
Section: Milk Yield and Liveweightmentioning
confidence: 99%