Digestibility and Rumen Escape of Soybean Meal, Blood Meal, Meat and Bone Meal and Dehydrated Alfalfa Nitrogen

Loerch, S. C.; Berger, L. L.; Plegge, S. D.; Fahey, G. C.

doi:10.2527/jas1983.5741037x

Cited by 79 publications

(20 citation statements)

References 19 publications

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“…True supplemental CP digestibilities, calculated by difference from the unsupplemented control, ranged from 95.4% for SBM to 79.1% for one MBM source. True CP digestibilities for MBM and PBM sources averaged 87.0%, which is similar to the true CP digestibility of 86.4% for MBM calculated by Loerch et al (1983) from duodenal and ileal flow. Escape protein and ash content were poorly correlated to digestibility ( R 2 = .27 for escape and R 2 = .12 for ash), suggesting that neither is related to CP digestibility in lambs.…”

Section: Methodssupporting

confidence: 59%

Limiting amino acids in meat and bone and poultry by-product meals.

Klemesrud

Klopfenstein²,

Lewis³

et al. 1997

Journal of Animal Science

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ABSTRACT:In situ, digestion, and growth studies were conducted to evaluate four meat and bone meals and six poultry by-product meals as sources of escape protein and to predict the first-limiting amino acid for growing calves. Escape protein values, determined by 12-h in situ incubation, ranged from 41.7 to 51.0% of CP for meat and bone meals; poultry by-product meals ranged from 32.0 to 39.8%. True protein digestion in the gastrointestinal tract of lambs differed among protein sources ( P < .05), ranging from 79 to 95%. In each of three growth trials, 60 steers (258 ± 24, 241 ± 23, and 230 ± 16 kg for Trials 1, 2, and 3, respectively) were supplemented with 4 of the 10 protein sources along with a urea supplement. Protein sources were fed at 30, 40, 50, and 60% of the supplemental CP, with urea supplying the remainder. Protein efficiency differed among treatments ( P < .10), ranging from .61 to 1.55. Amino acid composition was determined for each protein source, and the individual metabolizable amino acids were regressed on the protein efficiency values. Escape protein values were correlated ( R 2 = .75) with protein efficiency but had a negative slope. Metabolizable methionine was the only amino acid moderately correlated ( R 2 = .40, slope = 1.9) to protein efficiency, whereas other amino acids either correlated poorly or had negative slopes. These data indicate that the protein value of meat and bone meal and poultry by-product meal is limited by the amount of metabolizable methionine they contain.

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Section: Methodssupporting

confidence: 59%

Limiting amino acids in meat and bone and poultry by-product meals.

Klemesrud

Klopfenstein²,

Lewis³

et al. 1997

Journal of Animal Science

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“…Numerically, BM had the highest true protein digestibility (94.0%) and FTH the lowest (86.7%). Protein digestibility of BM is reported to be excellent, approaching 100% (Loerch et al, 1983;Blasi et al, 1991). Although protein digestibility of MBM can be reduced by inclusion of hair (Costa, 1994) and overheating during processing (Batterham and Darnell, 1986), we obtained a value of 92.6%, indicating that MBM protein was highly digestible.…”

Section: Resultsmentioning

confidence: 69%

Evaluation of feather meal as a source of sulfur amino acids for growing steers.

Klemesrud

Klopfenstein

Lewis

2000

Journal of Animal Science

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ABSTRACT:In situ and digestion studies were conducted to evaluate feather meal (FTH), blood meal (BM), and meat and bone meal (MBM) for escape protein content, amino acid composition of the escape protein, true protein digestibility, and digestibility of the individual amino acids. Following 12 h of ruminal incubation, escape protein values were 73.5, 92.4, and 60.8% of CP for FTH, BM, and MBM, respectively. Blood meal and MBM were poor sources of sulfur amino acids (SAA), whereas FTH was a good source. Most of the SAA of FTH, however, was Cys, with very little Met. True protein digestibilities were not different for the protein sources (P > .15), ranging from 86.7 to 94.0% of the CP. However, digestibilities of the individual amino acids were quite different. Two growth studies were conducted to evaluate FTH as a source of SAA for growing cattle. The first study used 120 steers (228 ± 15 kg) supplemented with urea, MBM, MBM plus 1% FTH, or MBM plus 2% FTH. Additionally, incremental amounts of rumen-protected Met were added to treat-

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“…Several factors are likely responsible for the differences observed in the Lehman et al (1995) study and the present study. Factors that influence the extent and rate of ruminal digestion of in situ studies are diet (Mohamed and Smith 1977), animal variation (Mehrez and Ørskov 1977), sample particle size (Mohamed and Smith 1977;Khorasani et al 1995), bag pore size (Onyango et al 1995), and the occurrence of other dietary components (Loerch et al 1983). …”

Section: In Situ Rumen Degradation Of Dry Mattermentioning

confidence: 99%

In situ rumen degradation characteristics of sixty cultivars of barley grain

Khorasani¹,

Helm²,

Kennelly³

2000

Can. J. Anim. Sci.

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In situ rumen degradation characteristics of sixty cultivars of barley grain. Can. J. Anim. Sci. 80: 691-701. Our objectives were to determine the extent of genetic variability in the rate and extent of ruminal digestion among 60 cultivars of barley, and to evaluate the correlations between ruminal digestion characteristics and chemical composition and test weight of barley cultivars. Barley samples were ground through a 2-mm screen, and bags containing 1 g of ground grains were incubated in the rumen of three late-lactation Holstein cows with rumen cannulae for 0, 1, 2, 4, 8, 12, 16, and 24 h. The rate and extent of ruminal digestion were estimated. The insoluble DM fraction ranged from 33.4 to 56.4%, the degradable DM fraction ranged from 34.1 to 60.2%, and the rate of degradation of DM ranged from 0.200 h -1 to 0.624 h -1 . Hulled barley cultivars had lower (P < 0.05) soluble and degradable fractions than hulless cultivars. The soluble fraction was positively correlated to starch content of barley cultivars (P = 0.01) and the degradable fraction was correlated to the test weight and CP content (P < 0.01). The observed variability in the ruminal digestion characteristics of barley cultivars indicates that genetic selection holds promise as a means of enhancing the nutritional quality of barley for ruminants. We also observed that 70% of the variation in digestibility could be explained by measures of bulk density, starch content, and kernel weight. La fraction soluble marquait une corrélation positive avec la teneur en amidon du grain (P = 0,01) et la fraction dégradable avec le poids spécifique et avec la teneur en PB (P < 0,01). À partir de la variabilité observée des caractères de digestion ruminale des divers cultivars d'orge, on peut conclure que la sélection génétique offre des possibilités d'améliorer la qualité nutritionnelle de l'orge pour les ruminants. Nous avons constaté en outre que 70 % des variations de la digestibilité pourraient s'expliquer par la densité apparente, par la teneur en amidon et par le poids individuel du grain.

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Digestibility and Rumen Escape of Soybean Meal, Blood Meal, Meat and Bone Meal and Dehydrated Alfalfa Nitrogen

Cited by 79 publications

References 19 publications

Limiting amino acids in meat and bone and poultry by-product meals.

Limiting amino acids in meat and bone and poultry by-product meals.

Evaluation of feather meal as a source of sulfur amino acids for growing steers.

In situ rumen degradation characteristics of sixty cultivars of barley grain

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