Metabolizable energy requirements for maintenance and growth of Awassi lambs

Jassim, Rafat Al; Hassan, Shaker A.; Al-Ani, A.N.

doi:10.1016/0921-4488(95)00775-x

Cited by 15 publications

(12 citation statements)

References 6 publications

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“…The predicted ME requirements tended to be greater for the docked lambs at lower growth rates ( ≤ 100 g/day) and lower for growth rates between 100 and 225 g/day. The calculated ME requirements for maintenance for the undocked lambs in the present study were similar to those calculated by Agricultural and Food Research Council (1990) for growing sheep (0·25 MJ/kg M 0·75 per day) and Al Jassim et al (1996) for the same breed of lambs of similar age and on a similar feeding regime. The calculated ME requirement for maintenance was slightly higher for the docked lambs indicating that there was some energy transferred from the tail of the undocked lambs.…”

Section: Metabolizable Energy Requirements For Maintenance and Growthsupporting

confidence: 72%

Effect of tail docking in Awassi lambs on metabolizable energy requirements and chemical composition of carcasses

et al. 2002

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The effect of tail docking on metabolizable energy requirements and carcass characteristics was studied using 80 weaned entire Awassi (between 0·74 and 1·1 MJ/ kg M 0·75 per day). Hot and cold carcass weights were similar ( P > 0·05) for the two groups. Differences in empty body weight and fleece-free empty body weight were significant ( P < 0·05) only for the 0·443 to 0·522 MJ/kg M 0·75 per day level of ME intake. Predicted ME requirements were higher for docked lambs for an estimated LWG between 0 and 100 g/day and lower for higher LWG (125 to 225 g/day). Docking had no effect ( P > 0·05) on food conversion efficiency (FCE). Carcasses from docked lambs had significantly lower ( P < 0·001) internal plus tail fat. Pooled soft tissue excluding tail fat, for the undocked lambs contained significantly more ( P < 0·01) protein, less ( P < 0·001) fat, higher ( P < 0·01) moisture and similar ( P > 0·05) ash content.

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Section: Metabolizable Energy Requirements For Maintenance and Growthsupporting

confidence: 72%

Effect of tail docking in Awassi lambs on metabolizable energy requirements and chemical composition of carcasses

et al. 2002

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“…respectively) reported in Texel crossbred lambs fed ad libitum (Galvani et al, 2008). Expressed on the basis of BW, the daily DMI of lambs fed ad libitum in our study was 117 g/kg 0.75 of BW, which is 7%, 16%, 34%, and 36% greater than that of Iraqi Awassi lambs (109 g/kg 0.75 of BW; Jassim et al, 1996), Brazilian hair lambs (101 g/kg 0.75 of BW; Silva et al, 2003), Iranian Baluchi sheep (87 g/ kg 0.75 of BW; Kamalzadeh and Shabani, 2007) or Ideal Â Ile de France wool lambs (86 g/kg 0.75 of BW; Silva et al, 2003), respectively. Additionally, the ad libitum DMI (1.94 kg/d) observed in the present study is comparable with the value (1.87 kg/d) predicted by the equation of CSIRO (2007) for a 43-kg male sheep with an assumed standard reference mature weight of 70 kg, but is 20% greater than the value (1.61 kg/d) predicted by the equation of AFRC (1993) for growing sheep.…”

Section: Discussionmentioning

confidence: 88%

“…In published studies on the energy requirements of sheep, CH 4 production was estimated by empirical equations (Galvani et al, 2008;Silva et al, 2003) or by a constant proportion of either dietary GE intake (Kamalzadeh and Shabani, 2007) or dietary DE intake (Degen and Young, 2002;Jassim et al, 1996;Ramírez et al, 1995). The present study differed from these studies in that CH 4 output from lambs was determined in vivo using an open-circuit respiration system.…”

Section: Discussionmentioning

confidence: 92%

Energy requirements for maintenance and growth of Dorper crossbred ram lambs

et al. 2012

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“…Similarly, Salinas et al (2006) and Seabrook et al (2011) reported that bypass fat had no effect on daily weight gain. Live weight gain was highly correlated with metabolizable energy (ME) intake (Al Jassim et al, 1996). In the current study, the addition of bypass fat did not cause differences in ME intake among the three treatment groups.…”

Section: Resultsmentioning

confidence: 50%

Effect of bypass fat on growth and body condition score of male Beetal goats during summer

et al. 2019

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The objective of the present study was to investigate the effect of feeding rumen bypass fat on the growth of male Beetal goats. Twenty-seven male kids with an average bodyweight of 34 ± 1.8 kg (mean ± SD) and aged 12 to 15 months were randomly divided into three treatment groups under a completely randomized design. The treatments consisted of : i) CON, basal diet without added fat (basal diet of chopped sorghum with 0.75 kg concentrate per animal); ii) MF, basal diet with added fat at 2.5% of dry matter in concentrate (Energizer-RP10, Scothorn Nutrition, Malaysia); and iii) HF, basal diet with added fat at 5% of dry matter in concentrate. Dry matter intake (DMI) and faecal score were recorded daily. Live bodyweight was recorded fortnightly. Linear body measurements, which included wither height (WH), heart girth (HG), body length (BL), and body condition scores (BCS), were recorded monthly. The results indicated that the addition of bypass fat in concentrate did not affect DMI linearly. However, a quadratic trend of DMI was observed in response to fat addition (P <0.1). The average daily gain was similar for CON, MF, and HF treatment groups (P >0.05). Moreover, the addition of bypass fat did not affect the BCS, WH, HG, and BL. The HF group had a higher faecal score than the CON and MF groups (P <0.05). The current findings conclude that the addition of bypass fat in diets did not improve the growth performance of yearling Beetal male goats.

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Metabolizable energy requirements for maintenance and growth of Awassi lambs

Cited by 15 publications

References 6 publications

Effect of tail docking in Awassi lambs on metabolizable energy requirements and chemical composition of carcasses

Effect of tail docking in Awassi lambs on metabolizable energy requirements and chemical composition of carcasses

Energy requirements for maintenance and growth of Dorper crossbred ram lambs

Effect of bypass fat on growth and body condition score of male Beetal goats during summer

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