Amino acid and energy interactions in growing pigs 2. Effects of food intake, sex and live weight on responses to lysine concentration in barley-based diets

@article{Giles1986AminoAA,
  title={Amino acid and energy interactions in growing pigs 2. Effects of food intake, sex and live weight on responses to lysine concentration in barley-based diets},
  author={L. Giles and E. Batterham and E. Dettmann},
  journal={Animal Science},
  year={1986},
  volume={42},
  pages={133-144}
}
Utilization of crystalline or protein-bound lysine for growth and carcass traits of barrows and gilts fed individually or in groups.
TLDR
The results indicate that Lys from SBM-bound and CLys source were utilized similarly for growth and carcass traits regardless of sex or feeding method. Expand
Amino acid requirement of growing pigs depending on amino acid efficiency and level of protein deposition 1st communication: lysine
TLDR
Results from the present studies indicate that efficiency of lysine in different feed proteins varies in a very wide range and this variation greatly affected the calculated lysines requirement. Expand
The effect of immunization against GnRF on nutrient requirements of male pigs: a review.
TLDR
It is important to ensure that lysine requirements are met to obtain the maximum benefits of entire male production during this phase of immunization, and to predict nutrient requirements over the period of rapidly changing metabolism. Expand
CASTRATION IN THE SWINE INDUSTRY AND THE IMPACT ON GROWTH PERFORMANCE - PHYSICAL VERSUS VACCINATION
TLDR
It is important to ensure that dietary lysine requirements are met to obtain the maximum benefits of boar production coupled with vaccination against GnRF, which results in superior feed efficiency and carcass lean yield over physical castration while maintaining pork eating quality. Expand
Effects of Increasing Lysine to Calorie Ratio and Added Fat for Growing-Finishing Pigs Reared in a Commercial Environment: I. Growth Performance and Carcass Characteristics1
TLDR
The data indicate that 6.0% added dietary fat decreases ADFI and increases ADG and G:F in growing-finishing pigs reared in a commercial environment and Lys:calorie ratio regimens appeared to maximize growth performance and carcass leanness in gilts and barrows, respectively. Expand
Amino acid requirement of growing pigs depending on amino acid efficiency and level of protein deposition. 2nd communication: threonine
TLDR
The results from the present studies indicate that the efficiency of threonine in different feed proteins varied in a wide range, and this factor has to be taken into account for requirement calculations. Expand
The effect of lysine/digestible energy ratio on growth performance and nitrogen deposition of hybrid boars, gilts and castrated male pigs
An experiment was conducted to examine the effects of dietary lysine/digestible energy (DE) ratio (g/MJ) on growth performance and body composition of boars, gilts and castrated males from 25 to 90Expand
Nitrogen utilization and lean growth performance of 20- to 50-kilogram pigs fed diets balanced for lysine:energy ratio.
TLDR
Two experiments were conducted to determine the lysine:DE ratio that would maximize nitrogen retention and lean growth in growing pigs and a reduction in feed intake and an improvement in feed efficiency was observed as the DE level increased. Expand
Performance of pigs from two genotypes inrelation to the amino acid content of the diet
TLDR
It seems that with fast-growing pigs, under restricted feeding, the use of high levels of balanced amino acids can be advised, up to about 9.5 g lysine/kg during the growing period and 8.5% during the finishing period, which led to a significant increase in growth rate up to a plateau. Expand
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References

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Amino acid and energy interactions in growing pigs 1. Effects of food intake, sex and live weight on the responses of growing pigs to lysine concentration
TLDR
Analysis of the response surfaces delineated by lysine level and phase of growth indicated that for males and females with restricted food and males fed ad libitum, maximum daily gain was produced by feeding at least 10 g lysines per kg, declining to about 8 g/kg at 80 kg. Expand
Nutritive value of barley for pigs.
TLDR
The present experiment was undertaken to measure the variation in amino acid digestibility and DE content among five marketing grades of barley. Expand
Availability of lysine in vegetable protein concentrates as determined by the slope-ratio assay with growing pigs and rats and by chemical techniques.
TLDR
With pigs, estimates of availability were lower using carcass compared to live-weight values, but there was no consistent effect of including food intake in the criterion of response, and estimates based on food conversion efficiency were higher than those based on weight gain. Expand
Availability to pigs of amino acids in cereal grains. 2. Apparent and true ileal availability.
TLDR
There was much variation in amino acid availability within a grain species (wheat) as among the other grains and generally, lysine and threonine were among the least available amino acids while glutamic acid and arginine wereamong the most available amino acid in cereal protein. Expand
Utilization of free lysine by growing pigs.
TLDR
The results indicate that current estimates of the lysine requirements of pigs that are based on responses to supplements of free l Lysine under once daily feeding regimens may be 10-30% over-estimated, as a result of incomplete utilization of the free lysines. Expand
Lupinus albus cv. Ultra and Lupinus angustifolius cv. Unicrop as protein concentrates for growing pigs
TLDR
The Ultra and Lupinus angustifolius lupins contained 3750 ppm manganese, and this may have contributed to the depressed performance of pigs on Ultra meal. Expand
The determination of tryptophan in purified proteins and in feeding-stuffs.
  • N. Matheson
  • Chemistry, Medicine
  • The British journal of nutrition
  • 1974
TLDR
A method was developed for the estimation of tryptophan in purified proteins or in feeding-stuffs and results agreed fairly well with published values for purified proteins, though rather less well for the samples analysed by other workers. Expand
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