Low Crude Protein Corn and Soybean Meal Diets with Amino Acid Supplementation for Broilers in the Starter Period. 2. Effects of Feeding 13% Crude Protein

2012 ◽  
Vol 11 (3) ◽  
pp. 166-171 ◽  
Author(s):  
E. McGill ◽  
A. Kamyab ◽  
J.D. Firman
Keyword(s):  
Amino Acid ◽  
Soybean Meal ◽  
Crude Protein ◽  
Amino Acid Supplementation ◽  
Acid Supplementation ◽  
Period 2

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 Crude protein reduction with amino acid supplementation in tambaqui fingerling diets

2015 ◽  
Vol 36 (6Supl2) ◽  
pp. 4531
Author(s):  
Charlyan De Sousa Lima ◽  
Marcos Antonio Delmondes Bomfim ◽  
Jefferson Costa de Siqueira ◽  
Eduardo Arruda Teixeira Lanna ◽  
Felipe Barbosa Ribeiro ◽  
...  
Keyword(s):  
Body Composition ◽  
Amino Acid ◽  
Crude Protein ◽  
Experimental Unit ◽  
Amino Acid Supplementation ◽  
Feed Conversion ◽  
Carcass Yield ◽  
Acid Supplementation ◽  
Ideal Protein ◽  
The Ideal

<p>The aim of this study was to evaluate the effect that reduced crude protein (CP) diets with amino acid  supplementation, based on the ideal protein concept, have on the performance of tambaqui fingerlings. In total, 750 fingerlings with an initial weight of 0.44 ± 0.14 g, were used in a completely randomized design, with six treatments, five replications, and 25 fish per experimental unit. Treatments consisted of six isocaloric, isocalcic, isophosphoric, and isolysinic diets containing 32.0, 30.5, 29.0, 27.5, 26.0, and 24.5% CP. Performance parameters, carcass yield, body composition (body humidity, protein, and fat content), and nitrogen retention efficiency (NRE) of the fish were evaluated. When the CP content was reduced to 27.5%, there was an improvement in weight gain, specific growth rate, feed conversion, and protein efficiency rate. Feed intake was higher in fish fed diets containing 26% CP, followed by those fed diets containing 29 and 27.5% CP; diets containing other levels of CP did not differ among themselves. CP intake was reduced by the use of diets containing 24% CP, and the carcass yield was not influenced by the treatments. Reduced CP had no influence on body composition. NRE was higher in response to diets containing 26.0 and 24.5% CP. Reducing dietary CP content, from 32.0 to 24.5%, based on the ideal protein concept, is possible for tambaqui fingerlings, and a decrease of up to 24.5% enhances the fish performance.</p>

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