A new method of determining metabolisability of energy and digestibility of fatty acids in broiler diets

Vogtmann, H.; Pfirter, H. P.; Prabucki, A. L.

doi:10.1080/00071667508416222

Cited by 255 publications

(100 citation statements)

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“…Each morning, any dead rabbits were removed before feeding, and the cages, in which one or both rabbits had died, were excluded from the experiment. The apparent digestibility values of organic matter (OM), CP, ether extract (EE), crude fibre (CF), NDF, ADF, cellulose and hemicellulose were determined using acid-insoluble ash (AIA) as an inert marker according to Vogtmann et al (1975). The hard faeces were collected on 3 consecutive days (58 to 60 days of age).…”

Section: Methodsmentioning

confidence: 99%

“…Cellulose and hemicellulose contents were calculated, respectively, as: ADF-ADL and NDF-ADF. The content of AIAs were measured in the basal diets and in the faeces according to Vogtmann et al (1975). The raw meat from the left hind leg dissection was ground, freeze-dried and analysed using the following AOAC procedures (1984): moisture (method 950.46), fat (method 930.27) and ash (method 950.153).…”

Section: Physical Criteriamentioning

confidence: 99%

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Effects of water restriction on growth performance, feed nutrient digestibility, carcass and meat traits of rabbits

Bovera

Lestingi

Piccolo

et al. 2013

Animal

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The study investigates the effects of a post-weaning water restriction on performance, nutrient digestibility, carcass traits and meat quality of 84-day-old rabbits. A total of 1388 weaned rabbits (35 days) were randomly divided into two groups on the basis of BW and sex. The two groups were fed the same diets ad libitum both in the post-weaning (35 to 60 days) and fattening (61 to 84 days) periods. In the post-weaning period, one group (AL) also received drinking water ad libitum, whereas the other (WR) had a water restriction from 35 to 41 days 2 h/day; from 42 to 48 days 2.5 h/day; from 49 to 55 days 3 h/day; and from 56 to 60 days 4 h/day. During the fattening period, both groups had water-free access. Individual live weights and feed intake per cage were recorded weekly for 32 cages randomly chosen per group (64 rabbits) to calculate the BW gain, feed intake and feed conversion ratio (FCR). The apparent digestibility values of nutrients were measured using acid-insoluble ash. Carcass data were collected from 16 rabbits (8 males and 8 females) per group selected for similar final BW in both groups. Mortality from 35 to 60 days was higher in the AL group (10.1% v. 5.2%, for AL and WR, respectively, P , 0.0001). BW gain was higher for the AL group during both the post-weaning (122.4%, P , 0.01) and the entire period (17.5%, P , 0.05). Water restriction reduced feed intake both in the post-weaning (217.4%, P , 0.0001) and in the entire period (29.9%, P , 0.05). During the fattening period, FCR was lower for the WR group (5.15 v. 5.75 g/g, for WR and AL, respectively, P , 0.05). The apparent digestibilities of dry matter, organic matter, NDF, ADF and cellulose were greater in the restricted rabbits (14.7%, 14.5%, 110.2%, 118.8% and 112.8%, P , 0.01, P , 0.01, P , 0.05, P , 0.01, P , 0.05, respectively). Perirenal and scapular fat percentages were higher in the AL rabbits (130.7% and 1116.6%, P , 0.01 and P , 0.001, respectively). Water restriction increased saturated fatty acids (C16:0, 112.9%, P , 0.05), lauroleic acid (C12:1, 175.0%, P , 0.01), n-3 polyunsaturated fatty acids (C20:5, 150.0%, P , 0.01 and C22:5, 116.6%, P , 0.05) and the n-3/n-6 ratio (128.6%, P , 0.05). The applied water restriction between 35 and 60 days executed during the winter months improved the digestive health of rabbits, with no negative effects on carcass traits, or physical and chemical meat characteristics. However, from the animal welfare point of view, a water restriction can be criticized as a method to restrict feed intake.

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Section: Methodsmentioning

confidence: 99%

Section: Physical Criteriamentioning

confidence: 99%

Effects of water restriction on growth performance, feed nutrient digestibility, carcass and meat traits of rabbits

Bovera

Lestingi

Piccolo

et al. 2013

Animal

View full text Add to dashboard Cite

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“…the measurement of which can oresent difficulties as illustrated by the reiulrs ofcollaborative studies (Halloran 1972;Carew 1978). Other indicators used in BE assays with poultry include crude fiber (Almquist and Halloran l91l), polyethylene (Roudybush et al 1974) and acid insoluble ash (Vogtmann et al 1975 Lockhart et al (1967) showed that wheat may be assayed alone and Pryer and Connor (1966) found the single ingredient approach satisfactory for some grains but not for others. In an alternative procedure, the test material is substituted for a material of known AME content in a reference diet which is then assayed for AME; Hill et al (1960) used glucose as a standard whereas Potter et al (1960) .…”

Section: Control Of Feed Intakementioning

confidence: 99%

Measurement of Bioavailable Energy in Poultry Feedingstuffs: A Review

Sibbald¹

1982

Can. J. Anim. Sci.

114

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The importance of knowing the bioavailable energy (BE) content of poultry feedingstuffs is discussed in terms of economics, feed intake and the environment. The partition of ingested dietary energy is described and the effects of nutrient intake and of the microflora of the alimentary canal are outlined. Indirect biological, physical and chemical assays for BE are described and appraised. Procedures common to several direct bioassays for BE are discussed and points to consider in choosing between total excreta collection and the use of an indicator are presented. Assays for digestible energy, apparent metabolizable energy, true metabolizable energy and net energy are described. Variables affecting estimates of BE such as bird type, assay environment, assay diet and intake, assay design, the nitrogen correction, and metabolic plus endogenous losses are considered and a bioassay is recommended. The review concludes with brief speculation about future developments in the field of feedingstuff evaluation. Key words: Review, Energy, Assays, Methodology, Bioavailable

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“…Test ingredients, diets and digesta were analyzed for acid insoluble ash marker using a modification of the method of Vogtmann et al (1975) using 1-2 g of sample in 16 × 125 mm disposable borosilicate tubes. The samples were ashed at 500°C for 24 h or until contents were reduced to white ash, then 5 mL of 4 N HCl slowly added to the tubes and subsequently they were vortexed.…”

Section: Analytical Proceduresmentioning

confidence: 99%

The digestibility and content of amino acids in toasted and non-toasted canola meals

Newkirk

Classen²,

Scott³

et al. 2003

Can. J. Anim. Sci.

121

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. 2003. The availability and content of amino acids in toasted and non-toasted canola meals. Can. J. Anim. Sci. 83: 131-139. A study was conducted to determine the level and digestibilities of amino acids and the level of glucosinolates in toasted and non-toasted canola meal samples produced in commercial crushing plants in western Canada. A total of 26 non-toasted and 31 toasted canola meals samples were analyzed for apparent ileal amino acid digestibilities using broiler chickens between 21 and 28 d of age. Commercially toasted canola meal contained 5.6 g 16 g -1 N (range 5.3-5.9) of Lys with a digestibility ranging from 65.5 to 85.7% (mean = 78.0%). Non-toasted canola meal contained 6.0 g 16 g -1 N (range 5.7-6.3) Lys with digestibility values ranging from 87 to 92% (mean = 89.7%). Toasted canola meal had an average total digestible amino acid content (not including Tyr and Trp) of 69.6 g 16 g -1 N (range 56.6-75.6) while non-toasted canola meal had 77.6 g 16 g -1 N (range 73.1-82.0). The levels of aliphatic glucosinolates in the toasted (6.16 µmol g -1 meal, range 1.2-12.5) and non-toasted meals (10.5 µmol g -1 meal, range 7.8-15.1) were low and likely of no nutritional consequence. In conclusion, non-toasted canola meal contains higher levels of digestible amino acids than conventional toasted canola meal and therefore consideration should be given to modifying commercial systems to produce a non-toasted meal.

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A new method of determining metabolisability of energy and digestibility of fatty acids in broiler diets

Cited by 255 publications

References 1 publication

Effects of water restriction on growth performance, feed nutrient digestibility, carcass and meat traits of rabbits

Effects of water restriction on growth performance, feed nutrient digestibility, carcass and meat traits of rabbits

Measurement of Bioavailable Energy in Poultry Feedingstuffs: A Review

The digestibility and content of amino acids in toasted and non-toasted canola meals

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