Amino Acid Requirement of the Growing Rabbit: An Estimate of Quantitative Needs

Adamson, I.; Fisher, Hans

doi:10.1093/jn/103.9.1306

Cited by 44 publications

(31 citation statements)

References 4 publications

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“…For SAA, the concentration in proteins was lower than the generally accepted recommended value of 3.75% (De Blas and Mateos, 1998;Lebas 2004), but was homogenous for the three experimental diets. Nevertheless, this level still falls within the safety zone, where various authors have previously situated the optimum level for SAA ever since the very first proposition established by Adamson and Fisher (1973). A more valid point for the present comparison is the fact that the SAA level was homogenous for the three experimental diets.…”

Section: Nutritional Composition Of Dietsmentioning

confidence: 58%

The effects of the complete replacement of barley and soybean meal with hard wheat by-products on diet digestibility, growth and slaughter traits of a local Algerian rabbit population.

Lakabi-Ioualitene¹,

Lounaouci-Ouyed²,

Berchiche³

et al. 2010

World rabbit sci.

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Eighty one rabbits were used to study the utilisation of hard wheat by-products on the growth of rabbits from a local Algerian population. At weaning (28 d, 501±99 g), the animals were individually caged and received ad libitum one of the three experimental diets for 49 d. The control diet included 26% wheat bran (W26: control diet), alfalfa, barley and soybean meal. The two other diets were formulated by substituting barley and soybean meal with hard wheat by-products, and contained 60% (W60) or 67% (W67) of these by-products (50 or 57% bran and 10% middling). On average, diets contained 11.8% crude fi bre and crude protein decreased from 18.3 (W26) to 16.1% (W67). Growth traits and slaughter performances were recorded. Another group of thirty animals was used to determine dietary nutrient digestibility from 42 to 46 d of age. Dry matter digestibility and digestible energy content were lower in the W60 and W67 diets than in the control diet (W26) (71.3 and 71.5% vs. 74.9%, and 11.9 and 11.9 vs. 12.5 MJ/kg, respectively; P<0.01). In contrast, crude fi bre digestibility was lower in W26 (21.9%) than in the other two diets (29.6 and 32.2% for W60 and W67, respectively; P<0.01). The growth rates were similar for all three groups (28.0, 27.1 and 26.0 g/d for W26, W60 and W67) as were the feed conversion ratios (3.14, 3.17 and 3.10, respectively). Dressing out percentage (66.4±2.0% on average for the cold carcass) was not affected by the amount of wheat by-products in the diet. The total mortality rate was high (23%), probably corresponding to the low crude fi bre content of the three experimental diets, but was not connected to the amount of wheat by-products.

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Section: Nutritional Composition Of Dietsmentioning

confidence: 58%

The effects of the complete replacement of barley and soybean meal with hard wheat by-products on diet digestibility, growth and slaughter traits of a local Algerian rabbit population.

Lakabi-Ioualitene¹,

Lounaouci-Ouyed²,

Berchiche³

et al. 2010

World rabbit sci.

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“…Studies to determine the required levels of amino acids for rabbits began in the 1960s (McWard et al, 1967;Gaman & Fisher, 1970;Cheeke, 1971;Adamson & Fisher, 1971, with those focusing on commercial animals starting in the 1970s (Lebas et al, 1973;Colin, 1975;Davison & Spreadbury 1975;Spreadbury, 1978) and forming the basis of the nutritional recommendations included in the NRC (NRC, 1977).…”

Section: Introductionmentioning

confidence: 99%

Levels of lysine and methionine+cystine for growing New Zealand White rabbits

Monteiro-Motta¹,

Scapinello²,

Oliveira³

et al. 2013

R. Bras. Zootec.

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-Two experiments were carried out to evaluate, respectively, nitrogen balance (NB) and the productive performance of 31-to-50-day-old rabbits subjected to different levels of lysine and methionine+cystine (met+cys). Seventy-five animals were randomly distributed in 5 × 3 blocks (five levels of lysine: 5.5, 6.5, 7.5, 8.5 and 9.5 g/kg combined with three levels of met+cys: 5.0, 6.0 and 7.0 g/kg), with 15 treatments and five replications for the NB assay. The assay lasted 14 days: 10 days for acclimatization and four days for feces and urine collection. Increasing met+cys levels had a quadratic effect on the nitrogen excreted in urine (NU): the lowest excretion was found at the dietary level of 5.9 g/kg met+cys. Increasing lysine levels also affected NU and nitrogen retained daily (NR): the lowest NU was obtained at the dietary level of 7.28 g/kg lysine, and maximum NR was found at 7.24 g/kg lysine. Increases in met+cys levels in the diets affected neither performance nor carcass characteristics of rabbits up to 50 days of age. On the other hand, body weight at 50 days, daily weight gain and feed conversion of rabbits slaughtered at 50 days had a quadratic effect as the lysine levels increased. The best results were found at 7.5, 7.38 and 7.36 g/kg lysine. Lysine and met+cys levels of 7.4 and 5.0 g/kg in the diet are recommended for 31-to-50-day-old rabbits.

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“…The role of caecotrophy and caecal metabolism on nitrogen digestion and body retention (Tacker and Brant, 1955, Yoshida and Kandatsu, 1960and 1964Yoshida et al, 1968Yoshida et al, , 1971Yoshida et al, and 1972Hoover and Heitman, 1975;Proto, 1976), or the essentiality of some amino acids for growth (McWard et al, 1967;Gaman and Fisher, 1970;Cheeke, 1971;Fisher, 1971 and have been determined by several authors. From these studies, it was concluded that caecal microbiota are able to use non-protein compounds (such as urea) and that caecotrophy helps to improve N digestion and retention.…”

Section: Introduction: a Historical Perspectivementioning

confidence: 99%

New concepts and objectives for protein-amino acid nutrition in rabbits: a review.

Carabaño¹,

M.J.²,

García³

et al. 2010

World rabbit sci.

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ABSTRACT:In the European context, the new legislation to avoid mineral contamination and the ban on antibiotics as growth promoters has led to the defi nition of new objectives in respect of nitrogen supply. The present study summarizes the state of nitrogen nutrition in rabbits and reviews the role of protein and amino acids in rabbit health and the new nitrogen value of protein sources based on true ileal digestibility (TID) for future recommendations. The main sources of nitrogen for microbial growth are ammonia, urea and protein (endogenous and dietary). The surplus of nitrogen fl ow to the caecum increases mortality rates during fattening by favouring the growth of potential pathogenic bacteria. Accordingly, feeding strategies to reduce ileal nitrogen fl ow have been reviewed. A large reduction of dietary protein level might have negative consequences on growth performances and mortality. In order to formulate balanced lowprotein diets, data on ileal and faecal amino acid digestibility of 14 raw materials is summarized. The use of this different unit for amino acid digestibility is also discussed.

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Amino Acid Requirement of the Growing Rabbit: An Estimate of Quantitative Needs

Cited by 44 publications

References 4 publications

The effects of the complete replacement of barley and soybean meal with hard wheat by-products on diet digestibility, growth and slaughter traits of a local Algerian rabbit population.

The effects of the complete replacement of barley and soybean meal with hard wheat by-products on diet digestibility, growth and slaughter traits of a local Algerian rabbit population.

Levels of lysine and methionine+cystine for growing New Zealand White rabbits

New concepts and objectives for protein-amino acid nutrition in rabbits: a review.

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