Untersuchungen zur Bestimmung der Aminosäurenbilanz des Magen-Darm-Traktes beim Hühnergeflügel

Berger, H.; Pahle, T.; Köhler, Rosemarie; Jeroch, H.; Gebhardt, G.

doi:10.1080/17450398409425168

Cited by 4 publications

(1 citation statement)

References 19 publications

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“…Because post-ileal fermentation contributes in variable degrees to AA excretion, it has often been argued that digestibility measured at the terminal ileum is more suitable for feed evaluation than measurements of total excretion (Berger et al, 1984;Ten Doeschate et al, 1993;Ravindran et al, 1999;Kadim et al, 2002). In this paper the term AA digestibility refers to the measurement made at the terminal ileum (precaecal digestibility).…”

Section: Introductionmentioning

confidence: 98%

Variation in precaecal amino acid and energy digestibility between pea (Pisum sativum) cultivars determined using a linear regression approach

Kluth

Mantei²,

Elwert³

et al. 2005

British Poultry Science

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An experiment was conducted to study the variation in the precaecal amino acid (AA) and energy digestibility of 4 cultivars of white-flowering peas (Pisum sativum) for broiler chickens. The 4 cultivars were grown and harvested under the same agronomic and environmental conditions. One basal diet and 8 diets including each pea cultivar at inclusion rates of either 150 or 300 g/kg were used. Peas were included at the expense of starch. Hence, the differences in dietary crude protein and AA concentrations resulted only from the inclusion of peas. Titanium dioxide was included as an indigestible marker. Crude protein concentrations in the complete diets ranged from 164 to 244 g/kg. All diets were fed ad libitum to broiler chickens between 14 and 21 d of age. Seven pens of 12 chickens were allocated to each treatment. Digesta were sampled on a pen basis from the section of the gastrointestinal tract between Meckel's diverticulum and 2 cm anterior to the ileo-caeco-colonic junction. The proportions of crude protein and AAs digested responded linearly to increased intake and the relationships between quantitative intake and digested amounts of AAs were described by multiple linear regressions. The slope determined for each pea cultivar was taken as a measure of AA digestibility without the need for consideration of basal endogenous crude protein and AA secretions. Digestibility of AAs in peas ranged from 0.60 to 0.91. One cultivar had significantly lower AA digestibilities than the other three cultivars. This could be explained neither by the trypsin inhibitor activity nor by tannin levels. The AAs with the highest digestibilities in all cultivars were arginine > glutamic acid > lysine > methionine > phenylalanine > leucine. The AAs with the consistently lowest digestibilities were cystine < threonine. The ranking of the remaining AAs varied slightly between cultivars. The multiple linear regression approach is suitable to study differences in AA digestibilities without the need for consideration of basal endogenous AA losses. Diets containing 300 g/kg of peas had significantly lower energy digestibilities than the pea-free basal diet. The pea cultivar with the lowest AA digestibility caused the lowest energy digestibility at both levels of pea inclusion.

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Section: Introductionmentioning

confidence: 98%

Variation in precaecal amino acid and energy digestibility between pea (Pisum sativum) cultivars determined using a linear regression approach

Kluth

Mantei²,

Elwert³

et al. 2005

British Poultry Science

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Untersuchungen zum Einfluß gestaffelter Gaben an Soja- extraktionsschrot auf die scheinbare Verdaulichkeit der Rohnährstoffe und Aminosäuren bei kolostomierten Legehennen

Gruhn

Zander

1989

Archiv für Tierernaehrung

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Four colostomized laying hens per group were given a ration of barley and soya bean oil meal (SBM) with 12.5, 25.0 and 37.5% SBM resp. The crude protein intakes were 14.0, 17.7 and 21.4 g per animal and day. The lysine intake raised from 681 mg (group 1) to 1275 mg (group 3) per animal and day. The digestibility of dry matter and of the N-free extracts of the ration decreased with the rising SBM portion in the ration. The digestibility of crude protein remained constant. The investigated amino acids (Lys, His, Arg, Cys, Met) were higher digested in the 37.5% SBM ration than in the 12.5% SBM ration. The following digestibility values for SBM were found by means of the difference method: Dry matter 52.5%, crude protein 83.1%, crude fat 51.7%, crude fibre 5.5%, N-free extracts 50.6%. The level of the SBM did not influence the digestibility of the crude nutrients. The apparent digestibility of lysine from SBM depended on the level of intake and was found to be 82.3, 83.4 and 89.0%, resp. There were no differences in the digestibility of other amino acids.

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Einfluß verschieden hohen Niveaus an Sojaextraktionsschrot in der Ration auf die Verdaulichkeit der Rohnährstoffe, basischen und schwefelhaltigen Aminosäuren des Weizens bei kolostomierten Legehybriden

Gruhn

Hennig

1989

Archiv für Tierernaehrung

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In two digestibility experiments with 4 colostomized laying hybrids each, the influence of 12.5% (ration 1) and 25% soybean meal (ration 2) on the digestibility of the crude nutrients, the basic and sulphur-containing amino acids in the wheat rations was tested. In ration 1 the digestibility of the crude protein was 84.9%, of the crude fat 56.6% and that of the N-free extractives 87.4%; for ration 2 the values were 83.6%, 47.4% and 82.5%. The digestibility values for wheat acquired with the difference method for ration 1 were 85.7% for crude protein, 57.0% for crude fat and 89.8% for N-free extractives; energy concentration was 766 EFUhens. For wheat supplemented with 25% soybean meal the same digestibility value of the crude protein could be ascertained, the digestibility of the crude fat and the N-free extractives, however, was lower than for ration 1 so that an energy concentration lower by 3.9% was calculated. The possible causes of the influence of the different levels of lysine and thioamino acids on the digestibility of these amino acids of wheat are described.

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Untersuchungen zur Bestimmung der Aminosäurenbilanz des Magen-Darm-Traktes beim Hühnergeflügel

Cited by 4 publications

References 19 publications

Variation in precaecal amino acid and energy digestibility between pea (Pisum sativum) cultivars determined using a linear regression approach

Variation in precaecal amino acid and energy digestibility between pea (Pisum sativum) cultivars determined using a linear regression approach

Untersuchungen zum Einfluß gestaffelter Gaben an Soja- extraktionsschrot auf die scheinbare Verdaulichkeit der Rohnährstoffe und Aminosäuren bei kolostomierten Legehennen

Einfluß verschieden hohen Niveaus an Sojaextraktionsschrot in der Ration auf die Verdaulichkeit der Rohnährstoffe, basischen und schwefelhaltigen Aminosäuren des Weizens bei kolostomierten Legehybriden

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