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2014 | 23 | 2 |

Tytuł artykułu

Digestibility, ingestive behaviour and performance of non-descript breed hair lambs of different sexual classes subjected to feed restriction

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The aim of this work was to evaluate the effect of feed restriction and sexual classes on digestibility, ingestive behaviour and performance of nondescript breed hair lambs. Forty-five animals (15 males, 15 castrated males and 15 females) were distributed in a completely randomized 3 x 3 factorial design, with three feeding levels: ad libitum feeding (positive energy balance), 70% restriction of the ad libitum intake (maintenance level) and 80% restriction of the ad libitum intake (negative energy balance). For all variables, there was no effect of sexual class nor interaction of sexual class with feeding levels (P > 0.05). Animals fed restricted diets had a higher rumination time per unit of dry matter intake (P < 0.05). Digestibility was higher in feed-restricted lambs (P < 0.05). Weight gain and feed efficiency were lower for feed restriction (P < 0.05). Sexual class did not affect intake, digestibility, ingestive behaviour, or performance. Feed restriction affected digestibility and ingestive behaviour

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  • Department of Animal Science – UNIVASF Petrolina, Federal University of Sao Francisco Valley, Pernambuco 56300-990, Brazil
  • Department of Zootecnia Lavras, Federal University of Lavras – UFLA, Minas Gerais 37200-000, Brazil
  • Department of Zootecnia Lavras, Federal University of Lavras – UFLA, Minas Gerais 37200-000, Brazil
  • Department of Animal Science – UNIVASF Petrolina, Federal University of Sao Francisco Valley, Pernambuco 56300-990, Brazil
  • Department of Animal Science – UNIVASF Petrolina, Federal University of Sao Francisco Valley, Pernambuco 56300-990, Brazil
  • Department of Zootecnia Lavras, Federal University of Lavras – UFLA, Minas Gerais 37200-000, Brazil


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