Ruminal Degradation, Amino Acid Composition, and Intestinal Digestibility of the Residual Components of Five Protein Supplements

Maiga, Harouna A.; Schingoethe, D.J.; Henson, J.

doi:10.3168/jds.s0022-0302(96)76528-1

Cited by 41 publications

(30 citation statements)

References 15 publications

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“…Cozzi et al [4] only studied the essential amino acids and recorded an apparent higher degradability for histidine, arginine and lysine in agreement with the present results. In the same manner, the degradation of branchedchain amino acids, lower than that of TAA showed in this study was also observed in many works [5,9,13,20,27] carried out with punctual incubations. from the rumen with the liquid phase of a part of the soluble proteins.…”

Section: Discussionsupporting

confidence: 60%

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Rumen effective degradability of amino acids from soybean meal corrected for microbial contamination

et al. 2000

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-Rumen degradation kinetics and effective degradability of individual amino acids, total analysed amino acids (TAA) and crude protein (CP) of soybean meal were measured on four rumencannulated wethers using the nylon bag technique. Microbial contamination of the incubated residues was corrected using a continuous 15 N intraruminal infusion and isolated solid associated bacteria as a reference sample. TAA showed a lower soluble fraction (14.9 vs. 20.8%; P < 0.01), a similar insoluble-degradable fraction (79.0 vs. 79.2%) and a higher degradation rate (11.5 vs. 8.4% . h -1 ; P < 0.05) than CP. As a consequence, effective degradability was similar for TAA and CP (74.7 vs. 75.7%). Degradability values of individual amino acids varied moderately (range: ±6% of TAA degradability). Valine, isoleucine, leucine, alanine, aspartic acid and tyrosine showed significantly lower degradability than TAA, while the opposite effect was observed for histidine, threonine and glutamic acid. Degradability of individual amino acids was related to their soluble fraction (r = 0.877; P < 0.001).amino acids degradability / soybean meal / microbial contamination Résumé -Dégradabilité ruminale, corrigée par la contamination microbienne, des acides aminés du tourteau de soja. Les cinétiques de dégradation ruminale et la dégradabilité théorique des acides aminés individuels, des acides aminés totaux analysés (AAT) et des matières azotées totales (MAT) du tourteau de soja ont été établies par la méthode des sachets de nylon sur quatre béliers fistulés dans le rumen. Les résultats ont été corrigés en fonction de la contamination microbienne des résidus, moyennant l'infusion en continu de 15 N dans le rumen et l'emploi comme référence d'un échantillon de bactéries adhérentes isolées du rumen. Les AAT ont été moins solubles que les MAT Reprod. Nutr. Dev. 40 (2000) 579-586 579

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Section: Discussionsupporting

confidence: 60%

“…Therefore, available information concerning rumen degradation of their amino acids is abundant. Most published results only refer to a few incubation times [5,8,13,16,20,27,32]. However, studies that measured degradability values are limited [4,9,30], and only that of Harstad and Prestløken [9] provided full information about degradation.…”

Section: Introductionmentioning

confidence: 99%

Rumen effective degradability of amino acids from soybean meal corrected for microbial contamination

et al. 2000

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“…Including whey in a total mixed diet or ensiling whey has been shown to improve the digestibility of high fiber feed (Schingoethe 1976;Thivend 1977). Dried whey has been added to the diet to increase ruminal fermentation and microbial protein synthesis (Maiga et al 1996) as it contains 37-72% lactose (Maiga et al 1995). Whey adds fermentation stimulants such as bacteria enzymes and nutrients, but is not recommended that it be ensiled with high moisture feeds (Alberta Agriculture Food and Rural Development 2004).…”

Section: Resultsmentioning

confidence: 99%

Effects of feeding wheat straw and middlings ensiled with whey on digestibility and growth of cattle

ZoBell¹,

Okine²,

Olson³

et al. 2005

Can. J. Anim. Sci.

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. 2005. Effects of feeding wheat straw and middlings ensiled with whey on digestibility and growth of cattle. Can. J. Anim. Sci. 85: 69-74. Two studies were conducted with the objective of evaluating the effects of feeding different levels of whey ensiled with wheat straw and wheat middlings (whey silage) compared to control diets on production parameters in growing cattle. Whey silage was included in diets at 55 and 65.5% on a dry matter basis with net energy for maintenance and crude protein calculated to be similar to control diets containing a combination of alfalfa hay, corn silage and wheat middlings at 1.74 Mcal kg -1 and 13.4%, respectively. Dry matter intake averaged 8.41 versus 8.91 kg d -1 (P < 0.05) and 8.68 versus 7.09 kg d -1 (P < 0.05) when whey silage was included at either 55 or 65.5% of the diets compared to the control diets. Average daily gains of cattle fed whey silage incorporated at 55% was 1.00 versus 1.14 kg d -1 (P < 0.05), and reflected the difference in dry matter intake; no differences (P > 0.05) in feed efficiency (8.73:1 versus 8.71:1) were observed. However, the higher dry matter intake (DMI) of cattle fed diets with whey silage incorporated at 65.5% did not (P > 0.05) translate into higher average daily gain (1.23 versus 1.18 kg d -1 ), resulting in a higher (P < 0.05) feed to gain (7.00:1 versus 6.01:1) for the whey-based silage diets. Incorporation of whey silage in diets at 55% increased (P > 0.05) the dry matter digestibility by 12%, whereas incorporation at 65.5% decreased (P < 0.05) dry matter digestibility by 12% compared to control diets, with no differences (P > 0.05) in percent neutral detergent fiber digestibility (NDFD) at either level. We conclude that whey silage can be included at between 55 and 65.5% of the total dry matter in diets with no adverse effects on production compared to cattle fed diets containing a combination of alfalfa hay, corn silage and wheat middlings. Key words:Agricultural by products, crop residues, digestibility, growing cattle, production, whey silage ZoBell, D. R., Okine, E. K., Olson, K. C., Wiedmeier, R. D., Goonewardene, L. A. et Stonecipher, C. 2005. Digestibilité de la paille et du gru blanc de blé ensilés avec du lactosérum et incidence sur la croissance des bovins. Can. J. Anim. Sci. 85: 69-74. Les auteurs ont effectué deux études afin d'évaluer les effets d'une quantité variable de lactosérum ensilé avec de la paille et du gru blanc de blé (ensilage de lactosérum) sur les paramètres de production de bovins en croissance, comparativement à ceux nourris avec une ration témoin. L'ensilage a été ajouté à la ration à raison de 55 ou de 65,5 % de la quantité de matière sèche, avec ajustement de l'énergie nette essentielle et des protéines brutes pour qu'elles soient identiques à celles de la ration témoin faite de foin de luzerne, d'ensilage de maïs et de gru blanc de blé (1,74 Mcal par kg et 13,4 %, respectivement). L'ingestion de matière sèche s'établissait en moyenne à 8,41 kg par jour contre 8,91 (P < 0,05) et à 8,68 kg par jour cont...

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“…Ruminal amino acid degradation of DDGS Although DDGS may be considered as a good source of UDP, the PPS values showed that ID of UDP may be low compared with soya bean meal and corn gluten meal (Maiga et al, 1996;Kleinschmit et al, 2007) but can be higher than the rapeseed meal (Steingass et al, 2013). The PPS of DDGSs was higher than from DDGS-r, and they were low correlated with each other.…”

Section: Discussionmentioning

confidence: 95%

In situ ruminal degradation of amino acids and in vitro protein digestibility of undegraded CP of dried distillers’ grains with solubles from European ethanol plants

Westreicher-Kristen

Steingaß

Rodehutscord

2013

Animal

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The objectives of this study were to compare the in situ ruminal degradation of CP and amino acids (AAs) of dried distillers' grains with solubles (DDGS), and to estimate intestinal digestibility (ID) of undegradable crude protein (UDP) with the in vitro pepsinpancreatin solubility of CP (PPS), using either DDGS samples (DDGS-s) or DDGS residues (DDGS-r) obtained after 16 h ruminal incubation. Thirteen samples originating from wheat, corn, barley and blends were studied. Lysine and methionine content of DDGS-s varied from 1.4 to 4.0 and 1.3 to 2.0 g/16 g N, respectively. The milk protein score (MPS) of DDGS-s was low and ranged from 0.36 to 0.51, and lysine and isoleucine were estimated to be the most limiting AAs in DDGS-s and DDGS-r. DDGS-r contained slightly more essential AAs (EAAs) than did the DDGS-s. Rumen degradation after 16 h varied from 44% to 94% for CP, from 39% to 90% for lysine and from 35% to 92% for methionine. Linear regressions showed that the ruminal degradation of individual AAs can be predicted from CP degradation. The PPS of DDGS-s was higher than that of DDGS-r and it varied from 70% to 89% and from 47% to 81%, respectively. There was no significant correlation between the PPS of DDGS-s and PPS of DDGS-r ( R 2 = 0.31). The estimated intestinally absorbable dietary protein (IADP) averaged 21%. Moderate correlation was found between the crude fibre (CF) content and PPS of DDGS-r ( R 2 = 0.43). This study suggests an overestimation of the contribution of UDP of DDGS to digestible protein supply in the duodenum in some currently used protein evaluation systems. More research is required and recommended to assess the intestinal digestibility of AAs from DDGS.

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Ruminal Degradation, Amino Acid Composition, and Intestinal Digestibility of the Residual Components of Five Protein Supplements

Cited by 41 publications

References 15 publications

Rumen effective degradability of amino acids from soybean meal corrected for microbial contamination

Rumen effective degradability of amino acids from soybean meal corrected for microbial contamination

Effects of feeding wheat straw and middlings ensiled with whey on digestibility and growth of cattle

In situ ruminal degradation of amino acids and in vitro protein digestibility of undegraded CP of dried distillers’ grains with solubles from European ethanol plants

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