scholarly journals BROILER CARCASS COMPOSITION AS AFFECTED BY AMINO ACID SUPPLEMENTATION

1985 ◽  
Vol 65 (3) ◽  
pp. 717-723 ◽  
Author(s):  
J. D. SUMMERS ◽  
STEVEN LEESON
Keyword(s):  
Weight Gain ◽  
Amino Acid ◽  
Carcass Composition ◽  
Protein Diet ◽  
Amino Acid Supplementation ◽  
Breast Meat ◽  
Acid Supplementation ◽  
Key Words Amino Acid ◽  
Dietary Treatments ◽  
Soybean Diet

A corn-soybean diet containing 20% protein and a similar diet with glycine supplementation, to give a diet with a 24% protein equivalent, were supplemented with lysine and methionine. Weight gain, feed intake and carcass composition of male broilers were compared to those of similar birds fed a 24% protein corn-soybean diet. Weight gain and feed:gain ratio for the amino-acid-supplemented 20% protein diet were not significantly different from the 24% protein diet. The addition of glycine, while having little effect on performance, resulted in a reduction (P < 0.05) in carcass fat. In a second experiment, increasing the level of dietary protein to 22% from 16% or supplementing the 16% diet with additional lysine and methionine failed to alter weight gain or feed:gain ratio during the 4- to 7-wk finishing period. However, total carcass protein was increased and total carcass fat was reduced with the higher protein diet. Although the amount of total edible meat was similar for all diets, the 22% protein diet resulted in meat containing a greater percentage of protein than the other dietary treatments. An interesting observation was the decrease in protein and increase in fat contents of breast meat when additional methionine was added to a 16% protein diet. Key words: Amino acid supplementation, broiler carcass composition, meat yields

scholarly journals Performance of Broilers Fed Low Protein Diets with Lysine and Methionine Supplements

2006 ◽  
Vol 6 (1) ◽  
pp. 47-59
Author(s):  
Nancy Montilla ◽  
◽  
Lolito Bestil ◽  
Sulpecio Bantugan ◽  
Keyword(s):  
Amino Acids ◽  
Amino Acid ◽  
Protein Content ◽  
High Protein Diet ◽  
Protein Diet ◽  
Amino Acid Supplementation ◽  
Feed Conversion ◽  
Broiler Performance ◽  
Acid Supplementation ◽  
Low Protein

A feeding trial with broilers was conducted to evaluate the effects of amino acids (lysine and methionine) supplementation of diets low in protein content on the voluntary intake, feed conversion efficiency, broiler performance, and cost and return of broiler production. Results showed cumulative voluntary feed intake was not significantly affected by lowering the protein content of the diet. Cumulative weight gain of broilers was lower with diet when supplemented iwht lysine and methionine to meet requirements. Birds fed with diets low in protein has less efficient feed converstion, but became comparable with those receiveing diets high in protein when supplemented with amino acids. Feed cost per kilogram broiler produced was not significantly affected by diets used in the study, although the low-protien diet with amino acid supplement had the lowest values. In terms of return above feed and chick cost, broilers fed with high-protein diet had the greatest value, but not significantly different from birds fed with low-protien diet with amino acid supplementation which gave about P10 per bird higher returns than those fed low-protein diet without amino acid supplementation.

Nutritional evaluation of kale (Brassica oleracea) diets:1. Growth of grazing lambs as affected by time after introduction to the crop, feed allowance and intraperitoneal amino acid supplementation

1981 ◽  
Vol 96 (2) ◽  
pp. 257-267 ◽  
Author(s):  
T. N. Barry ◽  
R. C. McDonald ◽  
T. C. Reid
Keyword(s):  
Weight Gain ◽  
Amino Acid ◽  
Leaf Tissue ◽  
Live Weight ◽  
Body Growth ◽  
Amino Acid Supplementation ◽  
Total N ◽  
Minimum Requirement ◽  
Acid Supplementation ◽  
Period 2

SUMMARYThree successive sowings of marrow-stemmed kale (cv. Maris Kestrel) were grazed with lambs (initial weight 22·5 kg) for two consecutive 6-week periods, so that crop yield at the time of grazing was kept relatively constant at 6·5 t D.M./ha. Three crop allowances, 3·9 (H), 2·6 (M) and 1·3 (L) kg D.M./animal/day were imposed in a replicated design. Halfof the 32 lambs grazing each allowance received intraperitoneal injections of L-methionine + L-threonine three times per week. Twelve lambs were slaughtered at the start of the experiment and 48 at the end of each period.Leaf tissue, the diet of the H groups, contained 0·5% D.M. as S-methylcysteine sulphoxide (SMCO) and 0·7–1·5% total N as nitrate. Whole plants, the diet of the L groups, contained 0·75% D.M. as SMCO and 4·0–7·5% total N asnitrate. The diet of the M groups was intermediate.Rates of live-weight gain (LWG), empty-body weight gain (EBWG) and carcassweight gain (CWG) were lower in period 1 than in period 2 for animals grazing at all three allowances. A Heinz-Ehrlich body anaemia developed that was more severe in the first period, but did not differ between groups receiving the different allowances. Methaemoglobin was only detected in significant quantities at the time of peak Heinz body formation in period 1. CWG/EBWG was increased by the amino acid supplementation during period 1 but not period 2, showing that there was a temporary amino acid deficiency corresponding to the time when tho anaemia was most severe and body growth most depressed.In both periods animals grazing at L allowance had lower rates of LWG, EBWG and CWG than M and H animals, who performed similarly. Most of the differences in EBWG between feed allowance treatments and between periods could be explained by changes in estimated intake. Wool growth rates increased with increasing feed allowance and were slightly stimulated by amino acid supplementation.Copper true availability was calculated to be 1·6–2·7% with the lowest values for leaf tissue due to its high sulphur content. Truly available Cu/kg plant D.M. was below the minimum requirement for lamb growth, thus leading to a reduction in total liver Cu as the experiment progressed. Some indication was obtained that this could have been depressing LWG in the second period, especially in H lambs. Slight increases in thyroid gland weight were observed as the experiment progressed, but these were considered unlikely to have depressed body growth. It was concluded that the major factor limiting the feeding value of B. oleracea was its high content of nonprotein sulphur compounds, especially SMCO.

scholarly journals Limiting amino acids supplementation in low crude protein diets and their impacts on growth performance and carcass composition in Labeo rohita (rohu) adult fish

2023 ◽  
Vol 83 ◽  
Author(s):  
A. Ayub ◽  
F. Rasool ◽  
N. Khan ◽  
S. N. Qaisrani ◽  
S. Parveen ◽  
...  
Keyword(s):  
Amino Acids ◽  
Amino Acid ◽  
Crude Protein ◽  
Control Diet ◽  
Amino Acid Level ◽  
Carcass Composition ◽  
Amino Acid Supplementation ◽  
Acid Supplementation ◽  
Low Protein ◽  
Limiting Amino Acids

Abstract Ninety days study was conducted in hapas installed in earthen ponds. Fish of an average initial weight (220g) were evenly distributed in triplicate groups within fifteen hapas. Five experimental diets labeled as T1 (25% CP and NRC recommended amino acid level) as control diet, T2 (with 2% low protein and 5% amino acid supplementation), T3 (with 2% low protein and 10% amino acid supplementation), T4 (with 4% low protein and 10% amino acid supplementation) and T5 (with 4% low protein and 20% amino acid supplementation) were prepared. Fish were fed with @3% of their body weight twice a day at 10.00 & 16:00 hour. Significantly higher percent weight gain (420.18 ± 66.84a) and specific growth rate (13499.33±1273.54a) along with improved feed conversion ratio (1.29 ± 0.09b) and hundred percent survivals were recorded during the trial. Furthermore proximate analysis of meat showed significant improvement in the crude protein level (81.77 ± 0.19a) served with diet containing 20% limiting amino acids mixture. Therefore, limiting amino acids can be a source of cost effective feed and use safely in L. rohita diet.

scholarly journals The effect of selective amino acid supplementation on calcium absorption during a low protein diet

2013 ◽  
Vol 27 (S1) ◽  
Author(s):  
Jessica D Bihuniak ◽  
Rebecca R Sullivan ◽  
Christine A Simpson ◽  
Donna M Caseria ◽  
Kimberly O O'Brien ◽  
...  
Keyword(s):  
Amino Acid ◽  
Calcium Absorption ◽  
Protein Diet ◽  
Low Protein Diet ◽  
Amino Acid Supplementation ◽  
Acid Supplementation ◽  
Low Protein

CARCASS COMPOSITION AND PROTEIN UTILIZATION OF EMBDEN GEESE FED VARYING LEVELS OF DIETARY PROTEIN SUPPLEMENTED WITH LYSINE AND METHIONINE

1987 ◽  
Vol 67 (1) ◽  
pp. 159-164 ◽  
Author(s):  
JOHN D. SUMMERS ◽  
GERTRAUDE HURNIK ◽  
S. LEESON
Keyword(s):  
Weight Gain ◽  
Amino Acid ◽  
Chemical Composition ◽  
Dietary Protein ◽  
Carcass Composition ◽  
Amino Acid Supplementation ◽  
Protein Utilization ◽  
Protein Levels ◽  
Dietary Protein Level ◽  
Edible Protein

Three hundred and twenty sexed Embden geese were reared in litter floor pens to study the influence of dietary protein level and amino acid supplementation on weight gain and carcass composition. There was no difference in weight gain, to 9 wk of age, in response to dietary protein levels varying from 16 to 22%, or with methionine and lysine supplementation of these diets. Diet also had no effect (P > 0.05) on yield of various carcass parts or the chemical composition of these parts. Compared to the chicken broiler of a comparable age, a much greater proportion of the weight gain of the goose can be attributed to fat deposition. The ability of the goose to consume large quantities of feed may make it an interesting model in using forage material for the production of edible carcass protein. Key words: Goose, carcass composition, edible protein yield

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