Growth performance, carcass characteristics and plasma urea nitrogen concentration of nursery pigs fed low-protein diets supplemented with glucomannans or protease

The effects of increasing lysine levels on nitrogen balance of pigs fed on low protein diets were evaluated. Four treatments (diets) containing lysine levels (0.8, 1.0 1.2 and 1.4%) were applied to 12 starting (20.0 ± 1.8 kg) barrow pigs. Methionine, threonine and tryptophan were kept constant to the lysine ratio in all diets. Feces and urine were collected during a 5-day period. Nitrogen output in urine (NOU), total nitrogen output (TNO), nitrogen retention (NR), net protein utilization (NPU), biological value or feed protein (BVFP), urine urea nitrogen (UUN), and plasma urea nitrogen (PUN) were determined. PUN showed high negative correlations with BVFP (-0.84), NPU (-0.76), and NR (-0.78) and a positive correlation (0.79) to NOU. Lowest nitrogen excretion and the best use of diet protein were obtained with 1.1% total lysine level. PUN is efficient to indicate amino acid for pigs.

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Growth Performance, Carcass Characteristics, Nutrient Digestibility and Serum Biochemical Parameters of Broilers Fed Low-protein Diets Supplemented with Various Ratios of Threonine to Lysine

Asian-Australasian Journal of Animal Sciences ◽

10.5713/ajas.2005.1164 ◽

2005 ◽

Vol 18 (8) ◽

pp. 1164-1170 ◽

Cited By ~ 3

Author(s):

L. M. Gong ◽

C. H. Lai ◽

S. Y. Qiao ◽

Defa Li ◽

Y. X. Ma ◽

...

Keyword(s):

Growth Performance ◽

Biochemical Parameters ◽

Carcass Characteristics ◽

Nutrient Digestibility ◽

Serum Biochemical Parameters ◽

Low Protein ◽

Serum Biochemical ◽

Protein Diets

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The effects of continuous intravenous and intraruminal infusions of urea on nitrogen metabolism in sheep

Australian Journal of Agricultural Research ◽

10.1071/ar9710429 ◽

1971 ◽

Vol 22 (3) ◽

pp. 429 ◽

Cited By ~ 9

Author(s):

KH McIntyre

Keyword(s):

Nitrogen Metabolism ◽

Nitrogen Balance ◽

Nitrogen Concentration ◽

Route Of Administration ◽

The Body ◽

Urea Nitrogen ◽

Plasma Urea ◽

Urea Excretion ◽

Low Protein ◽

Nitrogen Concentrations

Urea was infused into sheep both intravenously and intraruminally, and at several increasing rates. The infusions were continuous for at least 6 days for each quantity of urea infused. Three predominantly roughage rations were used. Two of these had the same roughage constituents; both had relatively low protein contents, but one contained starch. The amount of urea nitrogen retained in the body from the urea infused was greatest on the ration containing starch, when the nitrogen balance improved by as much as 4.3 g/day. The concentration of ammonia in the rumen increased linearly with the amount of urea infused by either route of administration, but was much higher in the sheep infused intraruminally. Plasma urea nitrogen concentrations increased linearly with each quantity of urea infused until they reached about 30 mg/100 ml. They increased above this concentration only in the sheep fed on the low protein roughage ration without starch. The results suggest that a renal mechanism for urea excretion may control the plasma urea nitrogen concentration at about 30 mg/100 ml under certain conditions.

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141 Effect of Low Protein Diets with or without Supplemented Synthetic Amino Acids on Growth Performance of Nursery Pigs.

Journal of Animal Science ◽

10.1093/jas/sky073.139 ◽

2018 ◽

Vol 96 (suppl_2) ◽

pp. 75-75 ◽

Cited By ~ 1

Author(s):

S Spring ◽

C Shili ◽

A Pezeshki

Keyword(s):

Amino Acids ◽

Growth Performance ◽

Nursery Pigs ◽

Low Protein ◽

Synthetic Amino Acids ◽

Protein Diets

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Effect of L-Leucine Supplementation on Growth Performance and Carcass Characteristics of Grower-Broiler Chickens Fed Low Protein Diets

American Journal of Animal and Veterinary Sciences ◽

10.3844/ajavsp.2009.95.100 ◽

2009 ◽

Vol 4 (4) ◽

pp. 95-100 ◽

Cited By ~ 5

Author(s):

E. Erwan ◽

A.R. Alimon ◽

A.Q. Sazili ◽

H. Yaakub ◽

M. Hilmi

Keyword(s):

Growth Performance ◽

Broiler Chickens ◽

Carcass Characteristics ◽

Leucine Supplementation ◽

Low Protein ◽

Protein Diets

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The effects of carbadox on the performance and carcass characteristics of early-weaned pigs given high- and low-protein diets

Animal Science ◽

10.1017/s000335610000057x ◽

1982 ◽

Vol 34 (2) ◽

pp. 111-114 ◽

Cited By ~ 2

Author(s):

R. G. Campbell

Keyword(s):

Growth Performance ◽

Crude Protein ◽

Carcass Characteristics ◽

Live Weight ◽

High Protein ◽

Protein Diet ◽

Low Protein Diet ◽

Low Protein ◽

High Protein Diets ◽

Protein Diets

ABSTRACTThirty-six male pigs weaned at 28 days of age were used to study the effects of methyl-3-(2- quinoxalinylmethylene) carbazate-N1, N4-dioxide (carbadox) in high- and low-protein diets on the performance of pigs growing between 7 and 32 kg live weight, and on carcass characteristics at the latter weight.The inclusion of carbadox (55 mg/kg) in a high-protein diet containing 195 g crude protein per kg and 10·2 g lysine per kg had no effect on performance or on carcass characteristics. Pigs offered the high-protein diets grew more rapidly, had a lower food conversion ratio and were leaner at 32 kg live weight than those offered a lowprotein diet containing 146g crude protein per kg and 6·0 g lysine per kg. Supplementation of the low-protein diet with lysine (4·2 g/kg) had no effect on performance or carcass characteristics but the inclusion of carbadox in the low-protein diet increased growth performance and reduced carcass backfat measurements at 32 kg. However, the performance was inferior, and the backfat thickness greater, compared with the high-protein diets. On the other hand, supplementation of the low-protein diet with lysine plus carbadox raised growth performance and reduced carcass backfat measurements to the levels exhibited on the high protein diets.

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