Utilisation of synthetic amino acids by broiler breeder hens

Nonis, M. K.; Gous, RM

doi:10.4314/sajas.v36i2.3995

Cited by 12 publications

(7 citation statements)

References 15 publications

(15 reference statements)

Supporting

Mentioning

Contrasting

Order By: Relevance

“…According to Alagawany (2014), N retention was affected by TSAA intake, meaning that reducing dietary TSAA led to decreasing N excretion. The dietary methionine addition reduced N retention (Nonis & Gous, 2006). In the present study, reducing dietary TSAA/Lys ratio did not cause negative effects on egg production, egg mass and feed conversion.…”

Section: Figuresupporting

confidence: 50%

Effects of dietary total sulphur amino acids to lysine ratio on performance, nitrogen utilization of Ac layers (black-boned chicken)

Phuoc¹,

Dung²,

Manh³

2019

SA J. An. Sci.

View full text Add to dashboard Cite

A study was conducted to evaluate the effects of dietary total sulphur amino acids (TSAA) to lysine (Lys) ratio on performance of Ac layers (black-boned chicken). A total of 800 laying hens from 38 to 50 weeks old was allocated according to a completely randomized design with five treatments and 20 replicates of 8 birds each. The basal diet was formulated with 16% crude protein (CP), 2755 kcal/kg of metabolizable energy (ME), 0.482% methionine, 0.925% TSAA and 1.12% lysine. The TSAA/Lys ratio of the basal diet was 0.85. The basal diet plus four diets were formulated, two with TSSA levels at 10% and 20% below and two at 10% and 20% above that of the basal diet, giving 0.762%, 0.857%, 1.047% and 1.142% TSAA, respectively with the basal at 0.925% TSAA. The 10% decrease or increase in TSAA from 0.952% did not affect feed intake or egg production. However, further TSAA decreases from 0.857% to 0.762% led to reducing egg weight, which increased with a curvilinear trend as the level of TSAA in the diets was increased. TSAA influenced nitrogen retention in a quadratic trend, with hens fed diets containing 0.952% and 1.047 % TSAA retaining more nitrogen than the other treatments. Increasing dietary TSAA increased the white and yolk index and Haugh unit, whereas egg shell thickness, yolk colour and egg components were not influenced. The TSAA/Lys ratio of 0.85 improved egg weight and nitrogen retention of Ac layers.

show abstract

Section: Figuresupporting

confidence: 50%

Effects of dietary total sulphur amino acids to lysine ratio on performance, nitrogen utilization of Ac layers (black-boned chicken)

Phuoc¹,

Dung²,

Manh³

2019

SA J. An. Sci.

View full text Add to dashboard Cite

show abstract

“…The present study also showed that no response was obtained as methionine intake increased from 299 to 1599 mg/hen/day. Based on the values of methionine content of whole egg (3.646 mg/g egg) (Lunven et al 1973) and the efficiency of dietary methionine for egg production (55.2%) (Nonis & Gous 2006), the methionine requirement for producing eggs is up to 661 mg/100 g egg, so the egg mass has critical effect on the methionine requirement of broiler breeders. The methionine required for maintenance was also estimated as suggested by Nonis and Gous (2006) and Fisher (1998) to be 115.6 mg/hen/day.…”

Section: Discussionmentioning

confidence: 99%

“…Based on the values of methionine content of whole egg (3.646 mg/g egg) (Lunven et al 1973) and the efficiency of dietary methionine for egg production (55.2%) (Nonis & Gous 2006), the methionine requirement for producing eggs is up to 661 mg/100 g egg, so the egg mass has critical effect on the methionine requirement of broiler breeders. The methionine required for maintenance was also estimated as suggested by Nonis and Gous (2006) and Fisher (1998) to be 115.6 mg/hen/day. In the present study, the egg mass ranged from 27-30 g/hen/day, so the total methionine requirement of broiler breeders was estimated to be 291.1-313.9 mg/hen/day, which was just slightly higher than the amount supplied by the basal diet (262.5-273 mg/hen/day).…”

Section: Discussionmentioning

confidence: 99%

Dietary methionine source and level affect hepatic sulfur amino acid metabolism of broiler breeder hens

Jian-mei

Ding

Wang

et al. 2017

Animal Science Journal

View full text Add to dashboard Cite

A study was carried out to investigate the effects of dietary methionine source and level on plasma free amino acids patterns and the expression of genes involved in hepatic methionine metabolism in broiler breeders. A total of 2184 broiler breeders were assigned to 13 dietary treatments, with eight replicates per treatment. The 13 treatments included one control group and 12 additional treatments employing two sources and six levels (0.05, 0.10, 0.15, 0.20, 0.25 and 1.00%). Higher plasma methionine concentration was measured for DL‐methionine (DLM) treated hens. Plasma alanine concentration was linearly increased as DLM or 2‐hydroxy‐4‐(methylthio) butanoic acid (HMTBA) supplementation level increased. There was a linear increase in concentrations of tyrosine, valine, glycine and serine as dietary DLM supplementation level increased. Hens treated with DLM had higher relative expression of ADA than those fed HMTBA. The expression of MS,ADA,SAHH and MAT2A changed quadratically as HMTBA supplementation level increased, while the expression of GNMT and SAHH changed quadratically as DLM supplementation level increased. In conclusion, the effects of HMTBA on plasma free amino acid patterns and the expression of hepatic genes involved with methionine are different from DLM.

show abstract

“…In a series of landmark studies, Ted Batterham demonstrated that the daily duration of feed access negatively impacted on the efficiency with which lysine HCl is utilised in pigs [128][129][130][131]. That this phenomenon would extend to poultry was supported by data generated in [132] but not by data generated in Baker and Izquierdo [133]. Assuming Batterham's findings are applicable to broiler chickens, the implication is that extending the daily hours of illumination would improve the utilisation of non-bound amino acids.…”

Section: Lysinementioning

confidence: 99%

Synthetic and Crystalline Amino Acids: Alternatives to Soybean Meal in Chicken-Meat Production

Selle

Dorigam

Lemme

et al. 2020

Animals

View full text Add to dashboard Cite

Simple Summary: There is a distinct possibility that synthetic and crystalline, or non-bound, amino acids will partially replace soybean meal in diets for broiler chickens and reduce the dependency of the chicken-meat industry on soybean meal as its principal source of protein.The genesis of this partial replacement will be the successful development of reduced-crude protein diets. A reduced-crude protein diet contains less soybean meal, and therefore less crude protein, but an increased array of essential and even non-essential non-bound amino acids so that requirements are met. There are, however, several challenges to be overcome if reduced-crude protein diets are to be successfully developed and adopted.Abstract: This review explores the premise that non-bound (synthetic and crystalline) amino acids are alternatives to soybean meal, the dominant source of protein, in diets for broiler chickens. Non-bound essential and non-essential amino acids can partially replace soybean meal so that requirements are still met but dietary crude protein levels are reduced. This review considers the production of non-bound amino acids, soybeans, and soybean meal and discusses the concept of reduced-crude protein diets. There is a focus on specific amino acids, including glycine, serine, threonine, and branched-chain amino acids, because they may be pivotal to the successful development of reduced-crude protein diets. Presently, moderate dietary crude protein reductions of approximately 30 g/kg are feasible, but more radical reductions compromise broiler performance. In theory, an 'ideal' amino acid profile would prevent this, but this is not necessarily the case in practice. The dependence of the chicken-meat industry on soybean meal will be halved if crude protein reductions in the order of 50 g/kg are attained without compromising the growth performance of broiler chickens. In this event, synthetic and crystalline, or non-bound, amino acids will become viable alternatives to soybean meal in chicken-meat production.Animals 2020, 10, 729 2 of 20 generates 1.1 kg CO 2 equivalents, which is considerably less than that of pork (3.8 kg CO 2 equivalents) or beef (14.8 kg CO 2 equivalents) production [2]. Moreover, it has been predicted that chicken-meat production will contribute 7.1% of greenhouse gas emissions compared to 29.8% and 63.1% for pork and beef, respectively [2]. However, diets for broiler chickens may contain more than 200 g/kg protein, the majority of which is derived from soybean meal; consequently, the chicken-meat industry has a huge demand for soybean meal. The production of 1 kg of chicken meat will require an input in the order of 560 g soybean meal given a conservative 250 g/kg dietary inclusion of soybean meal and a 2.25:1 conversion of feed into carcass weight. Importantly, this demand can be diminished by inclusions of non-bound (synthetic and crystalline) amino acids in broiler diets at the expense of soybean meal via the successful development of reduced-crude protein (CP) diets [3]. Therefore, synthetic...

show abstract

Utilisation of synthetic amino acids by broiler breeder hens

Cited by 12 publications

References 15 publications

Effects of dietary total sulphur amino acids to lysine ratio on performance, nitrogen utilization of Ac layers (black-boned chicken)

Effects of dietary total sulphur amino acids to lysine ratio on performance, nitrogen utilization of Ac layers (black-boned chicken)

Dietary methionine source and level affect hepatic sulfur amino acid metabolism of broiler breeder hens

Synthetic and Crystalline Amino Acids: Alternatives to Soybean Meal in Chicken-Meat Production

Contact Info

Product

Resources

About