Influence of Added Synthetic Lysine in Low-Protein Diets with the Methionine Plus Cysteine to Lysine Ratio Maintained at 0.75

Liu, Z.; Wu, G.; Bryant, M. M.; Roland, D. A.

doi:10.1093/japr/14.1.174

Cited by 44 publications

(26 citation statements)

References 12 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…Therefore, this result can be associated to the amino acid imbalance with the decreasing feed intake that might have negatively affected the intake of nutrients (calcium, phosphorus, vitamins, trace minerals and others) essential for egg shell formation. In contrast to the present result, Liu et al (2005) and Novak et al (2004) found no differences in egg shell percentage with increasing lysine levels in the diet.…”

Section: Resultscontrasting

confidence: 99%

“…However, there was a quadratic effect (P<0.01) of increased levels of lysine (Figure 4) The best feed conversion of 1.855 (g/g) was obtained with the addition of 0.795% of digestible lysine with consumption of 805mg of digestible lysine/ bird/day. Liu et al (2005) also assessed birds receiving different levels of dietary lysine and observed improved feed conversion in laying hens consuming higher levels of lysine.…”

Section: Resultsmentioning

confidence: 99%

See 1 more Smart Citation

Performance and egg quality of laying hens fed with dietary levels of digestible lysine and threonine

Figueiredo¹,

Bertechini

Fassani

et al. 2012

Arq. Bras. Med. Vet. Zootec.

View full text Add to dashboard Cite

The present study was developed using 864 Hy-Line W36 laying hens (42 to 58 weeks of age) with a randomized experimental design in a 4x3 factorial arrangement, with five replicates and 12 birds per experimental unit and 4 evaluation periods of 28 days each. The digestible lysine levels studied were 0.675%, 0.743%, 0.811% and 0.879%, and the digestible threonine levels were 0.542%, 0.596% and 0.650%. The performance and egg quality was evaluated. There were no significant effects on the egg production, specific gravity, albumen and yolk percentage and total solids in albumen and yolk for birds submitted to the different dietary digestible lysine and threonine levels. There was significant interaction between these amino acids on the egg shell percentage and Haugh unit in fresh eggs. There was a decreasing linear effect on the feed intake with increase of digestible lysine level. Egg weight, egg mass and feed conversion demonstrated a quadratic effect with the increase of the digestible lysine level with the best results in the diets with 0.754, 0.772 and 0.795% of digestible lysine, respectively. 0,754; 0,772 e 0,795%, poedeiras, proteína bruta, unidade Haugh

show abstract

Section: Resultscontrasting

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Performance and egg quality of laying hens fed with dietary levels of digestible lysine and threonine

Figueiredo¹,

Bertechini

Fassani

et al. 2012

Arq. Bras. Med. Vet. Zootec.

View full text Add to dashboard Cite

show abstract

“…However, they go against Liu et al (2005) and Sá et al (2007), who observed no effect of lysine levels in egg yolk weight. In contrast, observed lower weight of yolk, when laying hens were fed greater levels of lysine in the diet.…”

Section: Resultsmentioning

confidence: 86%

“…Thus, lysine affected the increase in egg weight and this increase was proportional to the shell. Prochaska & Carey (1993), Scheideler et al (1996), and Liu et al (2005) also found no difference in the percentage of shell eggs in birds fed different amounts of dietary lysine. Ratifying therefore, the observations of Yamagushi et al (1988) and Cheng et al (1998) restated that protein synthesis is not related to zinc, except for the bone tissue.…”

Section: Resultsmentioning

confidence: 94%

Lysine and zinc chelate in diets for brown laying hens: effects on egg production and composition

Neto

Pacheco²,

Albuquerque

et al. 2011

R. Bras. Zootec.

View full text Add to dashboard Cite

-It was evaluated the effects of levels of digestible lysine and chelate zinc combined in the diet for laying on the egg quality. It was used 720 birds, from 48 to 60 weeks of age, distributed in a completely randomized design in a 3 × 5 factorial scheme with three levels of zinc and five levels of lysine, applied into six replicates in the experimental units of eight birds per plot. The levels were: 137, 309 and 655 ppm zinc and 0.482, 0.527, 0.582, 0.644 and 0.732% digestible lysine. It was not observed any interaction among digestible lysine and zinc for the primary variables of fractions and egg composition. Levels of zinc reduced egg weight, suggesting the lowest efficiency in nutrient intake. At the highest dietary concentration of zinc, the addition of digestible lysine coincided with a linear increase in shell weight. However, zinc addition, regardless of lysine level in the diet, resulted in the reduction of egg weight and of the percentage of mineral matter in the yolk, limiting the efficiency of mineral deposition in this fraction of the egg. Concentration of zinc that produced the best results was 137 ppm inasmuch as higher quantities limit the use of digestible lysine, with effects harming composition and egg quality. The study indicates the following requirement for digestible lysine: 0.639% from the 48 th to the 52 nd week, 0.679% from the 52 nd to 56 th week, and 0.635% from the 56 th to the 60 th week. Considering the total period from 48 th to the 60 th week, the level 0.638% of lysine or the daily intake of 707 mg of the amino acid met the requirement for egg quality of semiheavy layers used in this study.

show abstract

“…In our study, overall egg weight was unaffected (P>0.05) by dietary energy level, crude protein and methionine + cysteine levels, except treatment E. Egg production, egg specific gravity, egg weight, egg mass, feed consumption, feed conversion, and body weight of hens were significantly increased by the increased protein level (Liu et al, 2004(Liu et al, , 2005Wu et al, 2005a). Increasing levels of methionine + cysteine showed a negative correlation between egg weight and egg production (Harms and Russel 1998).…”

Section: Discussionmentioning

confidence: 53%

Effects of Lowering the Dietary Levels of Energy, Protein and Amino Acid (Methionine and Cysteine) on the Performance of Laying Hens

Serpunja¹,

Balasubramanian²,

Kim³

2017

Korean Journal of Poultry Science

View full text Add to dashboard Cite

The purpose of our study was to determine the effects of varying levels of energy, protein, and amino acids on the performances of laying hens. A total of 240 Hy-Line Brown laying hens at 36 weeks of age were used in this 4-week feeding trial. The hens were randomly allocated to five treatment diets, with eight replications of six hens in each replicate cage. The treatment diets were as follows: A-basal diet + 18% crude protein, metabolizable energy 2,800 kcal, total (methionine + cysteine) 0.65%; B-basal diet + 17% crude protein, metabolizable energy 2,700 kcal, total (methionine + cysteine) 0.59%; C-basal diet + 16.5% crude protein, metabolizable energy 2,700 kcal, total (methionine + cysteine) 0.59%; D-basal diet + 16.5% crude protein, metabolizable energy 2,700 kcal, total (methionine + cysteine) 0.54%; and E-basal diet + 16% crude protein, metabolizable energy 2,680 kcal, total (methionine + cysteine) 0.54%. The study results revealed that the hen-day egg production of hens that were fed with low-energy diets (B, C, and D) was comparable with that of hens fed with high-energy diet A, whereas average daily feed intake in hens fed treatment diet D and E was significantly higher (P<0.05) than that in hens fed treatment diet A. Overall, the eggshell thickness was unaffected by any of the treatment diets. Egg weight was comparable among the treatment diets, except for treatment diet E. Haugh unit improved with decreasing levels of dietary energy, protein, and methionine + cysteine in the diet. We can summarize that laying hens fed with low dietary energy and low crude protein treatment diets B, C, and D had satisfactory performance compared with those fed with high-energy treatment diet A. This indicates that there is the potential to reduce feed costs by formulating diets with lower energy and low protein levels.

show abstract

Influence of Added Synthetic Lysine in Low-Protein Diets with the Methionine Plus Cysteine to Lysine Ratio Maintained at 0.75

Cited by 44 publications

References 12 publications

Performance and egg quality of laying hens fed with dietary levels of digestible lysine and threonine

Performance and egg quality of laying hens fed with dietary levels of digestible lysine and threonine

Lysine and zinc chelate in diets for brown laying hens: effects on egg production and composition

Effects of Lowering the Dietary Levels of Energy, Protein and Amino Acid (Methionine and Cysteine) on the Performance of Laying Hens

Contact Info

Product

Resources

About