Effects of feeding male and female broiler chickens on low-protein diets fortified with different dietary glycine levels under the hot and humid tropical climate

Awad, Elmutaz Atta; Zulkifli, I.; Soleimani, A. F.; Ahmed, Aljuobori

doi:10.1080/1828051x.2017.1291288

Cited by 36 publications

(34 citation statements)

References 41 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…Hot and relatively humid environmental constraint can generate a state of physiological and behavioural stress that might affect the nutrient requirement in broiler chickens which evoke a negative effect on their productive performance, immunity and survivability [ 7 ]. Beneficial use of LP diets with supplemental EAA in a hot-weather has been reported [ 5 , 6 ]. In the present study, despite meeting the requirement for lysine, methionine+cysteine, tryptophan and threonine in LP diets, WG and FCR were depressed throughout the experimental period, regardless of protease supplementation.…”

Section: Discussionmentioning

confidence: 99%

“…In the present study, despite meeting the requirement for lysine, methionine+cysteine, tryptophan and threonine in LP diets, WG and FCR were depressed throughout the experimental period, regardless of protease supplementation. Reduction of growth performance in broilers fed LP diets and supplemented with EAA has been reported [ 5 ] irrespective of their environmental condition, and this reduction could be associated with lower levels of specific NEAA such as glycine and serine or glutamic acid, or with anon-specific need for nitrogen [ 6 ]. Earlier work on AA-supplemented LP diets in a hot environment [ 5 ] suggested that reduced FI could be a possible explanation for the inferior WG.…”

Section: Discussionmentioning

confidence: 99%

“…The scenario is more challenging when broilers are raised under high-temperature conditions, either during summer in temperate regions or in a tropical climate [ 5 ]. Although one study suggested LP diets as a means of reducing metabolic heat production associated with protein catabolism [ 6 ], others suggested the use of higher dietary crude protein (CP) mainly due to lower feed intake (FI) and protein digestibility under high-temperature conditions [ 7 ]. It is possible that the combination of these two strategies results in better performance by providing an LP diet supplemented with commercially available feed-grade AA and exogenous enzymes [ 8 – 10 ].…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

The effects of low-protein diets and protease supplementation on broiler chickens in a hot and humid tropical environment

Law

Zulkifli

Soleimani

et al. 2018

Asian-Australas J Anim Sci

Self Cite

View full text Add to dashboard Cite

ObjectiveThis experiment was conducted to investigate the effects of dietary crude protein (CP) level and exogenous protease supplementation on growth performance, serum metabolites, carcass traits, small intestinal morphology and endogenous protease activity in broiler chickens reared under a tropical climate.MethodsA total of 480 day-old male broiler chicks were randomly assigned to eight dietary treatments in a 4×2 factorial arrangement. The main effects were CP level (21.0%, 19.7%, 18.5%, or 17.2% from 1 to 21 days and 19.0%, 17.9%, 16.7%, or 15.6% from 22 to 35 days) and protease enzyme supplementation (0 ppm or 500 ppm). All experimental diets were fortified with synthetic feed-grade lysine, methionine, threonine and tryptophan to provide the minimum amino acid recommended levels for Cobb 500.ResultsReducing dietary CP linearly reduced (p<0.05) growth performance, serum albumin, total protein, and carcass traits and increased (p<0.05) serum triglycerides and abdominal fat. There was no consistent effect of reducing dietary CP on morphological parameters of the intestine and on the pancreatic and intestinal endogenous protease activity (p>0.05). Protease supplementation improved (p<0.05) feed conversion ratio, body weight gain, carcass yield and intestinal absorptive surface area.ConclusionProtease supplementation, as measured by growth performance, intestinal morphology and carcass yield, may alleviate the detrimental effects of low protein diets in broiler chickens.

show abstract

Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

The effects of low-protein diets and protease supplementation on broiler chickens in a hot and humid tropical environment

Law

Zulkifli

Soleimani

et al. 2018

Asian-Australas J Anim Sci

Self Cite

View full text Add to dashboard Cite

show abstract

“…At the beginning of this study sexing was not conducted and, unfortunately, at the end of the study more male chicks were seen in CONT group than in other treatment groups. Note that male chicks generally have higher and lower final BW and FCR, respectively, when compared with female ones [ 19 ]. In Indonesia, the indigenous crossbred chickens are generally produced by the traditional breeders.…”

Section: Discussionmentioning

confidence: 99%

Hematological parameters and selected intestinal microbiota populations in the Indonesian indigenous crossbred chickens fed basal diet supplemented with multi-strain probiotic preparation in combination with vitamins and minerals

Sugiharto¹,

Yudiarti²,

Isroli³

et al. 2018

Vet World

View full text Add to dashboard Cite

Aim:The aim of this study was to investigate the effect of dietary supplementation with multi-strain probiotic preparation in combination with vitamins and minerals on the hematological parameters and selected intestinal microbiota populations in the Indonesian indigenous crossbred chickens.Materials and Methods:A total of 240 one-day-old Indonesian indigenous crossbred chicks were raised for 10 weeks. The chicks were distributed to one of four groups, i.e., chicks receiving basal diet without any additive (CONT), chicks receiving basal diet with 0.04% of zinc bacitracin (AGP), chicks receiving basal diet with 0.01% of commercial probiotic Bacillus subtilis preparation (PROB1), and chicks receiving basal diet with 0.5% of multi-strain probiotic preparation in combination with vitamins and minerals (PROB2). Blood was collected on the week 8, while the internal organs and eviscerated carcasses were collected on the week 10.Results:PROB2 tended (p=0.09) to have a lower body weight (BW) compared to CONT chicks. Feed conversion ratio was higher (p<0.05) in PROB1 and PROB2 compared to CONT birds. The number of thrombocytes tended (p=0.09) to be higher in CONT than in other groups. Antibody titer against Newcastle disease virus vaccine was higher (p<0.05) in PROB1 and PROB2 than in CONT group. Serum triglyceride concentration was lower (p<0.05) in PROB2 than in other birds. AGP chicks had lower (p<0.05) serum total protein and globulin concentrations than CONT and PROB1 chicks. Serum albumin level was lower (p<0.05) in PROB2 than in CONT and PROB1 birds. Albumin to globulin ratio tended (p=0.06) to be higher in AGP than in other birds. Lactose-negative Enterobacteriaceae tended (p=0.07) to be lower in PROB1 and PROB2 than in CONT group. PROB1 and PROB2 tended (p=0.06) to have greater lactic acid bacteria (LAB) population than in CONT and AGP birds.Conclusion:Multi-strain probiotic preparation in combination with vitamins and minerals was able to improve immune response and control the potentially pathogenic bacteria. However, the additive could not improve the growth performance of the Indonesian indigenous crossbred chickens.

show abstract

“…Diets reduced in crude protein (CP) or metabolisable energy (ME) have received a lot of attention in poultry nutrition to minimise the feed cost and environmental impact in the past few decades (Rahman et al 2002;Zaman et al 2008). However, reduction of CP and or ME beyond certain levels may exert a negative effect on feed intake (FI) and growth rate (Zaman et al 2008;Dairo et al 2010;Awad et al 2015Awad et al , 2017 broiler chickens may adapt to diet of low-CP or ME content by eating more feed in an attempt to meet their nutrient requirements (Payne 1967;Leeson et al 1996), reduction below a certain level may not be compensated (Attia et al 2011). Moreover, for birds under HS condition, feeding low-CP diets could be detrimental to their feed conversion ratio (FCR) (Zulkifli et al 2018).…”

Section: Introductionmentioning

confidence: 99%

Effects of protease supplementation of low protein and/or energy diets on growth performance and blood parameters in broiler chickens under heat stress condition

Law

Zulkifli

Farjam

et al. 2019

Italian Journal of Animal Science

Self Cite

View full text Add to dashboard Cite

The effects of feeding low dietary crude protein (CP) and/or metabolisable energy (ME) with or without supplemental protease on growth performance, carcase characteristics and physiological responses in broiler chickens were investigated under cyclic heat stress condition. A total of 350 day-old male broiler chicks were fed with one of the following seven experimental diets: (1) recommended-CP and recommended-ME (RPE, served as control); (2) recommended-CP and low-ME (RPLE); (3) recommended-CP and low-ME with protease (RPLEP); (4) low-CP and recommended-ME (LPRE); (5) low-CP and recommended-ME with protease (LPREP); (6) low-CP and low-ME (LPE) and (7) low-CP and low-ME with protease (LPEP). From 22 to 42 d of age, half of the chickens from each dietary group were exposed to 34 ± 1 C for 7 h daily (heat stress), whereas the other half were raised at constant 23 ± 2 C (normal temperature). Supplementation of protease to RPLE, LPRE and LPE diets had no significant effects on feed intake (FI), weight gain (WG) or feed conversion ratio (FCR). Diet had no effect on serum glucose, total protein, certain acute phase proteins (APPs), corticosterone or breast yield. Regardless of protease supplementation, heat stressed birds had significantly lower FI, WG and breast yield, and higher FCR, APPs and corticosterone compared to birds raised in normal temperature. In conclusion, dietary supplementation of protease to low CP and/or ME diets showed negligible effects on growth performance, carcase characteristic and physiological responses in broiler chickens under heat stress condition. The inclusion of microbial protease in broiler diets could be considered by poultry industry as an effective nutritional tool for reducing ME or CP, in order to decrease abdominal fat deposition, improve feed efficiency and increase the profit margin. HIGHLIGHTS Protease supplementation has no specific help for broilers under heat stress. Feeding low CP and/or ME diet is not stressful for broiler chickens.

show abstract

Effects of feeding male and female broiler chickens on low-protein diets fortified with different dietary glycine levels under the hot and humid tropical climate

Abstract: Effects of feeding male and female broiler chickens on low-protein diets fortified with different dietary glycine levels under the hot and humid tropical climate,

Cited by 36 publications

References 41 publications

The effects of low-protein diets and protease supplementation on broiler chickens in a hot and humid tropical environment

The effects of low-protein diets and protease supplementation on broiler chickens in a hot and humid tropical environment

Hematological parameters and selected intestinal microbiota populations in the Indonesian indigenous crossbred chickens fed basal diet supplemented with multi-strain probiotic preparation in combination with vitamins and minerals

Effects of protease supplementation of low protein and/or energy diets on growth performance and blood parameters in broiler chickens under heat stress condition

Contact Info

Product

Resources

About