Effect of Glutamic Acid on Broilers Given Submarginal Crude Protein with Adequate Essential Amino Acids Using Feeds High and Low in Potassium

Moran, E. T.; Stilborn, H. L.

doi:10.3382/ps.0750120

Cited by 41 publications

(25 citation statements)

References 18 publications

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“…The latter effect had been previously observed by other investigators when feeding reduced dietary CP diets to broiler chickens (Lipstein et al, 1975;Moran et al, 1992;Deschepper & DeGroote, 1995;Moran et al, 1996;Bartov & Plavnki, 1998). Furthermore, a previous study associated the increase in abdominal fat percentage with overall fat tissue deposition when feeding a reduced CP diet to broilers (Namroud et al, 2008).…”

Section: Dietary Protein Effects On Growth Performance Carcass Traitsupporting

confidence: 50%

“…evaluating reduced dietary CP levels for chickens have been well documented (Noblet et al, 1987;Moran et al, 1996;Kerr & Kidd, 1999a;Kerr & Kidd, 1999b). There is disagreement in the literature about the specific effects caused by an excessive reduction in dietary CP, but there seems to be a general agreement that there is a threshold point in poultry that if crossed, will ultimately lead to reduced growth.…”

Section: Dietary Protein Effects On Growth Performance Carcass Traitmentioning

confidence: 99%

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Dietary protein effects on growth performance, carcass traits and expression of selected jejunal peptide and amino acid transporters in broiler chickens

Corzo

Loar

Kidd

et al. 2011

Rev. Bras. Cienc. Avic.

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The effect of dietary protein on growth, carcass traits and some specific intestinal intestinal peptide and amino acid transporters in broiler chickens was studied. Birds received a common pre-test diet, and were subsequently fed either a standard positive control diet (PC) or a reduced CP diet (RCP) from 21 to 42 d of age. Growth was negatively impacted with feeding of RCP as manifested by an increase in feed consumption and feed conversion ratio. Carcass traits also showed evidence of negative effects of feeding the RCP diet, leading to a reduction in carcass and breast meat yield and an increase in abdominal fat percentage. Blood plasma total protein was reduced when the broilers were fed the RCP diet. Expression of mRNA for one peptide (PepT1) and four AA intestinal transporters (b o,+ AT; CAT2; y + LAT2; EAAT3) was measured from the jejunum. Quantified mRNA for the AA transporters y + LAT2 and EAAT3 showed that they were upregulated in chickens fed the RCP-diet. The transport systems PepT1, b o,+ AT, and CAT2, were not affected by the dietary treatment imposed. The live and processing data validated the in vivo portion of the study and elucidated the negative impact of feeding the RCP diet, while the responses observed with the expression of the various transporters may help provide some insight on the physiological consequences and adaptations that birds endure when provided diets too low in CP for abnormally extended periods of time.

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Section: Dietary Protein Effects On Growth Performance Carcass Traitsupporting

confidence: 50%

Section: Dietary Protein Effects On Growth Performance Carcass Traitmentioning

confidence: 99%

Dietary protein effects on growth performance, carcass traits and expression of selected jejunal peptide and amino acid transporters in broiler chickens

Corzo

Loar

Kidd

et al. 2011

Rev. Bras. Cienc. Avic.

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“…The diets with the higher Pro from feedstuffs also had a slightly higher CP content, which may explain the better performance. Moran and Stilborn [2] observed heavier BW from supplementing corn-based diets with Glu; however, these diets were not isocaloric or isonitrogenous. Jackson et al [19] did not find any benefit on BW of turkeys from 5 to 7 wk of age from adding 4% Glu to the diets, even though the diet contained adequate CP (26%).…”

Section: Live Performancementioning

confidence: 95%

“…Connective tissue is important for skin integrity, an important factor during the rearing and processing of broiler carcasses because skin tears and bruising can downgrade carcass quality. Moran and Stilborn [2] reported that carcass back bruising and drumstick deformations were reduced with the supplementation of Glu in the diet, regardless of the dietary CP level fed, suggesting that Glu supplementation may have improved the rate of connective tissue formation during the rapid growth period of the bird.…”

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confidence: 98%

Effect of added l-glutamic acid on male broiler performance when using wheat- or corn-based diets and 2 different anticoccidials

Stilborn

Moran

2010

Journal of Applied Poultry Research

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Glutamic acid may play a role in skin integrity, which could influence carcass quality. A study was undertaken to determine if supplementing l-Glu would influence the live performance and carcass quality of broilers when using different cereal and anticoccidial sources. The study consisted of 2 cereal sources (wheat or corn), 2 l-Glu levels (0 or 1.75%), and 2 anticoccidial sources (monensin or halofuginone), for a total of 8 treatments with diets meeting or exceeding nutrient recommendations for essential amino acids and energy for the starter (0 to 17 d of age), grower (18 to 43 d of age), and finisher (44 to 48 d of age) feeds. Each dietary treatment was fed to 4 replicate pens of birds containing 33 chicks/pen at the time of placement. Adding l-Glu to the starter diets with monensin improved FE regardless of the cereal source; however, the opposite was true for halofuginone. Feed efficiency at d 43 and 48 was improved with added Glu, although during the grower period, cereal and anticoccidial sources did influence FE independently. Bruising of wings and drumsticks, and back skin problems were influenced by anticoccidial source. Adding Glu reduced drumstick deformities, especially when halofuginone was used in the diets. Yields of breast fillets and tenders were significantly greater for corn-fed vs. wheat-fed broilers. Breast fillet yield (g) was lower for broilers fed halofuginone. Drumstick yield (%) was increased with the addition of Glu to the diet. Supplementing the diet with Glu reduced carcass defects, which may reflect the need for Glu in connective tissue formation during rapid growth. The benefit of Glu may depend on the anticoccidial and cereal sources used.

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“…The diet of poultry is supplemented with synthetic amino acids to enhance production. Researchers have reported several benefits of amino acid supplementation as follows: (1) reducing cost in production, (2) producing the optimal balance of essential amino acids that presumably enhances growth, maximizes edible meat yield, reduces carcass fat and enables precise selection of progeny for breeding programs, and (3) balancing an animal's nutrient intake to conserve resources and minimize wastes [1,2,3,4,5,6].…”

Section: Introductionmentioning

confidence: 99%

Ideal Protein Concept in Broiler Starter Phase (0-28 Days) Using Low-Protein Diets Supplemented with the Most Limiting Essential Amino Acids

Fasuyi¹,

Oluwasola²,

Ojo³

et al. 2017

JEAI

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Ideal protein concept was tested by evaluating the growth performance and nitrogen utilization of broiler birds (0-28 days). The most limiting essential amino acids (EAAs), L-Lysine, DL-Methionine, L-Tryptophan and L-Threonine were used in supplementing broiler diets in which crude protein levels were reduced across the diets. Crude protein (CP) levels varied from 23.0% in the control diet with the addition of the most limiting EAAs to other diets. Diet 6 had the lowest CP of 11.0%. Growth parameters and nitrogen retention were investigated and data obtained were analysed statistically using Minitab (Version 16). The feed intake reduced significantly (P<0.05) across the diets with the highest value of 58.68±0.03g/b/d obtained for birds on the control diet of 23.0% CP and the lowest FI value obtained for birds on 11.0% CP diet with EAAs supplementation. The average weight gain (WG) also had the highest value of 33.47±0.03g/b/d for birds on the conventional control diet. Birds Fasuyi et al.; JEAI, 18(1): 1-9, 2017; Article no.JEAI.36256 2 on the least CP inclusion of 11.0% (diet 6) had the lowest average WG of 13.35±0.87g/b/d. Expectedly, the feed conversion ratio (FCR) had the best and lowest value of 1.75±0.01 for birds on the conventional control diet and the lowest for birds on the 11.0% CP (diet 6) at 3.31±0.20. The protein efficiency ratio (PER) had the best and highest value of 3.23±0.06 for birds on the 14.0% low crude protein diet. The average nitrogen retention (NR) had the highest significant value of 0.78±0.02gN for birds on the 11.0% CP diet (diet 6). The lowest significantly different (P<0.05) AND value of 45.65±0.79% was obtained for birds on 11.0% low CP diet supplemented with EAAs. Birds on conventional control diet in which 23.0% CP was used with an animal protein source and birds on 20.0% CP with EAAs supplementation had the best similar FCR of 1.75±0.01and 1.90±0.02, respectively. Crude protein can be reduced by 3 percentage points from the conventional 23.0% (NRC 1994 recommendation) to 20.0% CP without any detrimental effects on the growth performance indices of broiler starter birds (1-28 days).Protein efficiency ratios were better for growing birds on EAAs supplementation. Original Research Article

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Effect of Glutamic Acid on Broilers Given Submarginal Crude Protein with Adequate Essential Amino Acids Using Feeds High and Low in Potassium

Cited by 41 publications

References 18 publications

Dietary protein effects on growth performance, carcass traits and expression of selected jejunal peptide and amino acid transporters in broiler chickens

Dietary protein effects on growth performance, carcass traits and expression of selected jejunal peptide and amino acid transporters in broiler chickens

Effect of added l-glutamic acid on male broiler performance when using wheat- or corn-based diets and 2 different anticoccidials

Ideal Protein Concept in Broiler Starter Phase (0-28 Days) Using Low-Protein Diets Supplemented with the Most Limiting Essential Amino Acids

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