Effect of Feed Restriction on Performance and  Nutrient Digestibility in Ram Lambs

Suryanarayana, B. Sivanagendra Babu M.V.A.N.; Latha, E. Raghava Rao P. Asha

doi:10.20546/ijcmas.2017.609.068

Cited by 3 publications

(1 citation statement)

References 4 publications

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“…This agrees with the findings of Greeff et al (1986), who reported a dramatic decrease in feed utilization in lambs with an ADG of 30 g d -1 . Reduction of growth rate in restricted animals may be due to the influence of the plane of nutrition on feed utilization efficiency and the amount of feed required for maintenance (Sivanagendra Babu et al, 2017). During the feed restriction phase, Abouheif et al (2013) also reported that feed efficiency decreased as the level of restriction increased.…”

Section: Discussionmentioning

confidence: 99%

Can Compensatory Growth Mitigate a Feeding Restriction in Growing Lambs?

Luzardo

Clariget

2019

Chil. j. agric. anim. sci.

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The aim of the study was to evaluate compensatory growth in lambs under semi-extensive growing conditions utilizing pasture haylage from Lotus uliginosus cv. E-Tanin as the main feed resource. Single (n = 36) and twin-born (n = 35) crossed Polwarth x Finnish Landrace lambs were assigned to three feeding treatments (restriction period) to achieve: low weight gain (LWG) less than 30 g a-1 d-1 , medium weight gain (MWG) ~ 60 g a-1 d-1 ; and high weight gain (HWG) (~90 g a-1 d-1 for 82 days. Lambs were offered pasture haylage at LWG, haylage plus corn at MWG, and haylage plus corn and soybean meal at HWG, restricted at 2.5 to 3% of BW. Afterwards, lambs were individually penned and fed ad libitum for 82 days (refeeding phase). Live weight and feed intake (FI) were recorded during the experimental period, and average daily gain (ADG) and feed conversion ratio (FCR) were estimated. Ribeye area (REA) and fat depth (FAT) were measured in the refeeding phase. Both ADG and FI were significantly different (P < 0.05) among treatments (HWG > MWG > LWG) in the feeding restriction period. FCR did not differ (P > 0.05) between MWG and HWG but were lower (P < 0.05) than LWG. No differences (P > 0.05) were found in ADG between single and twin-born lambs during the refeeding period. Initial and final REA was greater (P < 0.05) in MWG and HWG than LWG. Even though haylage is a cheap feed alternative in semi-extensive production systems, it does not enable a full compensatory growth of LWG and MWG lambs.

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Section: Discussionmentioning

confidence: 99%

Can Compensatory Growth Mitigate a Feeding Restriction in Growing Lambs?

Luzardo

Clariget

2019

Chil. j. agric. anim. sci.

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Effect of refeeding on growth performance, blood metabolites and physiological parameters of Dorper × Santa Ines lambs previously subjected to feed restriction

et al. 2022

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Context Weaned lambs raised on pasture-based systems in Brazil are often subjected to periods of forage shortage, limiting their nutrient and energy intake and, hence, their growth. Fast recovery of lamb body weight is important to the efficiency, sustainability and profitability of these sheep production systems. Aim We evaluated the effects of refeeding on growth performance, blood metabolites and physiological parameters of Dorper × Santa Ines lambs after low and moderate feed restriction, to determine whether there was a compensatory growth response. Methods Twenty-four non-castrated male lambs were assigned to a completely randomised design with three treatments and eight replicates. The trial was conducted in a feedlot and divided into two phases: (1) feed restriction for 64 days, and (2) refeeding for 42 days. In Phase 1, the respective treatments provided energy supplies of 0.481, 0.841 and 1.205 MJ metabolisable energy per kg metabolic weight daily, corresponding to 60% (PR60, moderate) and 30% (PR30, low) feed restriction levels and ad libitum intake. In Phase 2, the lambs in PR60 and PR30 treatments were refed ad libitum. Performance and blood measurements were taken in Phase 1 for the ad libitum treatment, and Phase 2 for PR60 and PR30 treatments. Key results Highest initial and final bodyweights of 32.7 and 41.2 kg were recorded in the PR30 treatment during Phase 2, compared with 23.0 and 36.7 kg averaged over PR60 and ad libitum treatments. Average daily gain did not differ among treatments (276 g/day, on average). Dry matter intake was significantly higher in PR30 than the ad libitum treatment (1406 vs 1158 g/day), with PR60 intermediate (1267 g/day). Serum levels of albumin, urea and creatinine indicated that protein metabolism was strongly affected by the PR60 treatment. High metabolic rate and subsequent rapid growth determined high respiratory rate and rectal temperature in the lambs from PR60 and PR30 treatments. Conclusions Moderate feed restriction relative to maintenance level followed by an ad libitum refeeding period in the feedlot leads to a strong compensatory growth response in Dorper × Santa Ines lambs. Implications In periods of low feed availability, keeping weaned lambs under moderate feed restriction is a good strategy to induce an efficient compensatory growth response in the feedlot during the finishing phase.

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Effect of quantitative feed restriction and realimentation on growth, carcass traits and economics in stallfed Barbari kids

Ramachandran

Singh

JINDAL

et al. 2019

Indian J of Anim Sci

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Four months old 24 Barbari kids were allotted randomly to ad lib. feeding up to 12 months age, 20% (mild) and 40% (moderate) feed restriction at 5th and 6th months (MMFR) and 20, 40, 60% (severe) feed restriction (MMSFR) each of 20 days duration during 5th and 6th months followed by realimentation up to 12 months age. At the end of realimentation, 4 kids from three groups were slaughtered and carcass traits evaluated along with its economics. The kids did not differ significantly in growth and carcass traits. Body weight change indicated that the occurrence of compensatory growth in feed restricted kids proportional to body weight loss occurred during restriction. The feed cost/kg gain was lowest in MMSFR kids followed by ad lib. fed and MMFR kids. Therefore, stallfed Barbari kids shall easily be maintained up to 60% lower feed for 60 days thereby increasing the profit of stallfed kid rearing.

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Effect of Feed Restriction on Performance and Nutrient Digestibility in Ram Lambs

Cited by 3 publications

References 4 publications

Can Compensatory Growth Mitigate a Feeding Restriction in Growing Lambs?

Can Compensatory Growth Mitigate a Feeding Restriction in Growing Lambs?

Effect of refeeding on growth performance, blood metabolites and physiological parameters of Dorper × Santa Ines lambs previously subjected to feed restriction

Effect of quantitative feed restriction and realimentation on growth, carcass traits and economics in stallfed Barbari kids

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