Low-Protein Diets Decrease Porcine Nitrogen Excretion but with Restrictive Effects on Amino Acid Utilization

2018 ◽  
Vol 66 (31) ◽  
pp. 8262-8271 ◽  
Author(s):  
Liuting Wu ◽  
Xiangxin Zhang ◽  
Zhiru Tang ◽  
Yunxia Li ◽  
Tiejun Li ◽  
...  
Keyword(s):  
Amino Acid ◽  
Nitrogen Excretion ◽  
Low Protein ◽  
Amino Acid Utilization ◽  
Protein Diets

scholarly journals Multiple Amino Acid Supplementations to Low-Protein Diets: Effect on Performance, Carcass Yield, Meat Quality and Nitrogen Excretion of Finishing Broilers under Hot Climate Conditions

Animals ◽  
2020 ◽  
Vol 10 (6) ◽  
pp. 973 ◽  
Author(s):  
Youssef A. Attia ◽  
Fulvia Bovera ◽  
Jinquan Wang ◽  
Mohammed A. Al-Harthi ◽  
Woo Kyun Kim
Keyword(s):  
Amino Acid ◽  
Meat Quality ◽  
Crude Protein ◽  
Positive Control ◽  
Nitrogen Excretion ◽  
Carcass Yield ◽  
Climate Conditions ◽  
Low Protein ◽  
Hot Climate ◽  
Protein Diets

The objective of this study was to evaluate the effect of low-protein diets with amino acid supplementation on growth performance, carcass yield, meat quality and nitrogen excretion of broilers raised under hot climate conditions during the finisher period. In trial 1, broilers from 28 to 49 days of age were fed 18% crude protein (CP) as a positive control or 15% CP supplemented with (1) DL-methionine (Met) + L-lysine (Lys), (2) Met + Lys + L-Arginine (Arg), or (3) Met + Lys + L-Valine (Val). In trial 2, broilers from 30 to 45 days of age, were fed an 18% CP diet as a positive control or 15% CP supplemented with Met, Lys, Arg, Val, L-Isoleucine (Ile) or combination with glycine (Gly) and/or urea as nitrogen sources: (1) Met + Lys, (2) Met + Lys + Arg, (3) Met + Lys + Val, (4) Met + Lys + Ile, (5) Met + Lys + Arg +Val + Ile + Gly, and (6) Met+ Lys + Arg + Val + Ile + Gly + urea. Protein use was improved by feeding low-protein amino acid-supplemented diets as compared to the high-protein diet. Feeding 15% crude protein diet supplemented with only methionine and lysine had no negative effects on carcass yield, CP, total lipids and moisture% of breast meat while decreasing nitrogen excretion by 21%.

214 Dietary Supplementation with a Combination of Valine and Isoleucine Annuls the Negative Effects of Very Low Protein Diets on Growth and Gut Development of Young Pigs

2021 ◽  
Vol 99 (Supplement_3) ◽  
pp. 112-113
Author(s):  
Mohammad Habibi ◽  
Parniyan Goodarzi ◽  
Cedrick N N Shili ◽  
Julia Sutton ◽  
Caitlyn Wileman ◽  
...  
Keyword(s):  
Thermal Radiation ◽  
Growth Performance ◽  
Nitrogen Excretion ◽  
Gut Development ◽  
Negative Effects ◽  
Final Body Weight ◽  
Low Protein ◽  
Feed Cost ◽  
Young Pigs ◽  
Protein Diets

Abstract Increased feed cost, post-weaning diarrhea, and nitrogen excretion are challenging the modern swine industry. Very low-protein (LP) diets (>4% units reduced protein) may reduce feed cost, diarrhea and nitrogen excretion; however, these diets impair growth performance of pigs despite supplementation of limiting amino acids (i.e., lysine, threonine, methionine and tryptophan). The objective of this study was to investigate the effect of valine, isoleucine and combination of both supplemented to VLP diet on growth, thermal radiation, and gut development in young pigs. Forty three-week-old weaned barrows were weighed (6.75 ± 0.14 kg) and randomly assigned to five groups (8 pigs/group) including: 1) standard diet or positive control (PC), 2) LP diet, 3) LP + valine (LPV), 4) LP + isoleucine (LPI) and 5) LP + both valine and isoleucine (LPVI) for five weeks. Daily feed intake and weekly growth characteristics were measured and weekly thermal images were captured. All pigs were euthanized at week 5 and tissue samples collected. All data were analyzed with univariate GLM followed by Tukey’s post-hoc test (SPSS®). Compared to PC, final body weight, average daily gain, average daily protein intake and gain:feed ratio were reduced in LP group, but feeding pigs with LPVI partially or completely recovered these parameters. Pigs fed with LPVI had higher thermal radiation than those fed with PC, LP, and LPI on days 28 and 35 of study and had a greater the area under the curve for thermal radiation than LP and LPI. Duodenal villus width and crypt depth, and ileal villus height were decreased in LP relative to PC, but LPVI either partially or fully recovered these measurements. In conclusion, supplementing a combination of valine and isoleucine recovered the negative effects of very low-protein diets on growth performance and gut development, but increased the thermal radiation in weaned pigs.

EFFECTS OF GRADED DIETARY PROTEIN LEVELS ON UREA RECYCLING IN THE PIG

1982 ◽  
Vol 62 (4) ◽  
pp. 1193-1197 ◽  
Author(s):  
P. A. THACKER ◽  
J. P. BOWLAND ◽  
L. P. MILLIGAN ◽  
E. WELTZIEN
Keyword(s):  
Dietary Protein ◽  
Protein Diet ◽  
Nitrogen Excretion ◽  
Entry Rate ◽  
Protein Nitrogen ◽  
Protein Levels ◽  
Low Protein ◽  
Key Words Pig ◽  
Urea Recycling ◽  
Protein Diets

The kinetics of urea recycling were determined in six female crossbred pigs utilizing a radioisotope dilution technique. The experimental animals were fed three times daily 500 g of a corn-soybean meal diet formulated to contain 8.4, 15.8 or 24.7% crude protein. Nitrogen digestibility, urinary nitrogen excretion, total nitrogen excretion and retained nitrogen were highest on the 24.7% protein diet and decreased with decreasing dietary protein. Urea pool size, entry rate and excretion rate were also highest on the 24.7% protein diet and decreased with decreasing protein intake. Expressed as a percentage of the total entry rate, a significantly higher percentage of urea was recycled in pigs fed the low protein diets compared with those fed a higher protein diet. Key words: Pig, urea, recycling, kinetics, protein

Effect of antibiotic-free, low-protein diets with specific amino acid compositions on growth and intestinal flora in weaned pigs

2020 ◽  
Vol 11 (1) ◽  
pp. 493-507 ◽  
Author(s):  
Junyan Zhou ◽  
Yuming Wang ◽  
Xiangzhou Zeng ◽  
Tao Zhang ◽  
Peili Li ◽  
...  
Keyword(s):  
Amino Acid ◽  
Growth Performance ◽  
Intestinal Flora ◽  
Amino Acid Profile ◽  
Gut Health ◽  
Weaned Pigs ◽  
Specific Amino Acid ◽  
Amino Acid Compositions ◽  
Low Protein ◽  
Protein Diets

This study investigated the effects of modulation of the amino acid profile on growth performance and gut health in weaned pigs fed an antibiotic-free, low-protein diet.

Feeding increased ratios of ileal digestible methionine to lysine on the performance of lean genotype pigs between 25 and 50 kg liveweight given low protein diets

1995 ◽  
Vol 1995 ◽  
pp. 173-173
Author(s):  
J. P. Braund ◽  
P. H. Simmins ◽  
J. Weigel ◽  
R. Maillard
Keyword(s):  
Amino Acid ◽  
Accurate Information ◽  
Amino Acid Supplementation ◽  
Maximal Growth ◽  
Food Conversion ◽  
Optimal Production ◽  
Low Protein ◽  
Amino Acid Requirements ◽  
Protein Diets ◽  
Food Conversion Efficiency

Reducing the protein content of commercial diets in Europe would reduce environmental nitrogen pollution. It has been demonstrated that this could be achieved by employing crystalline amino acid supplementation (e.g. Chavel and Granier, 1994; Fuller et al, 1979a, b). Accurate information on the true ileal digestible amino acid requirements of the modern lean genotype pig is necessary in order to ensure optimal production at low protein intakes. The objective of this study was to identify the optimum ileal digestible methionine:lysine (met:lys) ratio to achieve maximal growth and food conversion efficiency of the lean genotype pig given low protein diets.

scholarly journals Influence of Low Protein Diets on Water Intake and Urine and Nitrogen Excretion in Growing Pigs

1998 ◽  
Vol 69 (3) ◽  
pp. 267-270 ◽  
Author(s):  
Keiichi SUZUKI ◽  
Chun CHENG Xu ◽  
Hiroshi KANO ◽  
Toshiro SHIMIZU ◽  
Yuuichi SATO
Keyword(s):  
Water Intake ◽  
Growing Pigs ◽  
Nitrogen Excretion ◽  
Low Protein ◽  
Protein Diets
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