Crude protein and metabolizable energy levels for layers reared in hot climates

Almeida, V.; Dias, Adélio Nunes; Bueno, Cfd; Couto, Fap; Rodrigues, P. A.; Nogueira, Wcl; Filho, DE Faria

doi:10.1590/s1516-635x2012000300007

Cited by 8 publications

(7 citation statements)

References 16 publications

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“…This could also have been influenced by some ingredients in the diets to compel the birds to eat more to meet their body protein requirements. This corresponds with the results reported by [12] and [13]. The authors reported that chicks fed on low CP diet (17%) had a significantly (P= .05) reduced feed intake in comparison to the chicks reared on dietary CP ranging from 19 to 25%.…”

Section: Effect Of Different Dietary Crude Protein On Growth Performancesupporting

confidence: 91%

Effects of Graded Dietary Protein on Growth and Laying Performance of Pearl Guinea Fowl (Numida meleagris)

Okyere

Agyemang

Annor

et al. 2020

JALSI

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This study was conducted to investigate the effect of dietary crude protein (CP) on growth and laying performance of indigenous Guinea fowls (Numida meleagris) in Ghana. A total of Sixty (60) grower pearl Guinea fowl made up of twelve (12) males and forty-eight (48) females were randomly selected and grouped into four made up of (4) females and one (1) male. The groups were each subjected to four experimental diets containing 16%, 18%, 20% and 22% crude protein (CP). A completely randomized design (CRD) was used for the experiment. The data collected were subjected to analysis of variance (ANOVA) using GenStat version 11.1 (2008). Least significant difference (LSD) at 5% was used to separate the means. The result showed that birds fed with diets containing 22% crude protein (CP) had the heaviest (P= .05) body weight and body weight gain and reached age at first egg earlier followed by birds fed with diets containing 18% CP, 20% CP and 16% CP respectively. Feed consumption increased with an increase in dietary crude protein. Body weight at first egg was highest (P= .05) among birds fed with diets containing 22% crude protein (CP) and lowest in 16% crude protein (CP). Birds fed with diets containing 20% and 22% crude protein (CP) had the highest (P= .05) hen-day and hen- house egg production, whiles 16% crude protein (CP) diet recorded the lowest. It was concluded that body weight, body weight gain and total feed intake of indigenous Guinea fowls increased with increasing dietary crude protein. It is recommended to farmers that, diets containing 22% crude protein (CP) is ideal for optimum productivity of indigenous Guinea fowls.

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Section: Effect Of Different Dietary Crude Protein On Growth Performancesupporting

confidence: 91%

Effects of Graded Dietary Protein on Growth and Laying Performance of Pearl Guinea Fowl (Numida meleagris)

Okyere

Agyemang

Annor

et al. 2020

JALSI

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“…Moraes et al [91] reported that high ME content results in low feed intake in laying hens. Almeida et al [92] agreed with Moraes et al [91] by also concluding that high dietary energy concentration led to a reduction in feed intake of commercial laying hen. Harms et al [93] also observed that hens receiving the low-energy diet consumed significantly more feed than hens receiving the control and high-energy diets.…”

Section: Regulation Of Dietary Energy and Feed Intake In Poultry Nutrsupporting

confidence: 71%

Managing Dietary Energy Intake by Broiler Chickens to Reduce Production Costs and Improve Product Quality

Ahiwe¹,

Omede²,

Abdallh³

et al. 2018

Animal Husbandry and Nutrition

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Feeding constitutes the highest variable cost in poultry production, accounting for at least 60% of such costs, especially in an intensive rearing system. Energy intake is an essential factor in broiler production because of its involvement in growth rate, carcass quality as well as its role in the development of certain metabolic diseases. Dietary energy is supplied in broiler nutrition through different feed resources. Dietary energy content strongly regulates feed consumption, and energy is the most expensive item in poultry diets. At the same time, excess energy intake may result in an increased fat deposition, which affects meat quality and consumer health. This chapter explores the implication of imbalance in energy intake, possible nutritional strategies to restrict energy intake without reducing performance and hence improving meat quality.

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“…According to Summers et al (1991) and Penz & Jensen (1991), dietary CP of 16% was best for laying hens. Almeida et al (2012) concluded that Hy-Line W-36 layers kept in hot temperature conditions and fed 2700 kcal ME/kg of feed had higher egg production and egg mass than those fed 3100 kcal/kg. The requirements of CP and energy of Ac hens are therefore not exceptional.…”

Section: Resultsmentioning

confidence: 99%

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.

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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.

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Crude protein and metabolizable energy levels for layers reared in hot climates

Cited by 8 publications

References 16 publications

Effects of Graded Dietary Protein on Growth and Laying Performance of Pearl Guinea Fowl (Numida meleagris)

Effects of Graded Dietary Protein on Growth and Laying Performance of Pearl Guinea Fowl (Numida meleagris)

Managing Dietary Energy Intake by Broiler Chickens to Reduce Production Costs and Improve Product Quality

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

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