Apparent metabolizable energy of cereal grains for broiler chickens is influenced by age

Khalil, Mahmoud Mohamed; Abdollahi, M.R.; Zaefarian, F.; Chrystal, Peter V.; Ravindran, V.

doi:10.1016/j.psj.2021.101288

Cited by 23 publications

(31 citation statements)

References 42 publications

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“…The remarkably high nitrogen retention at day 2 was also noteworthy (Table 3) [35]. Khalil et al [88] reported that broiler age had a substantial impact on the AMEn of maize, wheat, sorghum, and barley, and the effect varied depending on the cereal grain. In general, the highest AMEn values for all grains were recorded on day 7 and declined, either linearly or quadratically, with advancing age.…”

Section: Energy Utilizationmentioning

confidence: 87%

Nutrition and Digestive Physiology of the Broiler Chick: State of the Art and Outlook

Ravindran

Abdollahi

2021

Animals

102

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Because the intestine is the primary nutrient supply organ, early development of digestive function in newly hatched chick will enable it to better utilize nutrients, grow efficiently, and achieve the genetic potential of contemporary broilers. Published data on the growth and digestive function of the gastrointestinal tract in neonatal poultry were reviewed. Several potential strategies to improve digestive tract growth and function in newly hatched chick are available and the options include breeder nutrition, in ovo feeding, early access to feed and water, special pre-starter diets, judicious use of feed additives, and early programming.

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Section: Energy Utilizationmentioning

confidence: 87%

Nutrition and Digestive Physiology of the Broiler Chick: State of the Art and Outlook

Ravindran

Abdollahi

2021

Animals

102

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“…The objectives of the present study were to investigate whether (i) the AMEn of commonly used cereal grains measured by the substitution method is influenced by the age of broilers and (ii) the AMEn estimates of cereals are comparable to those determined using the direct method in our previous study [ 4 ].…”

Section: Discussionmentioning

confidence: 99%

“…The direct method, which is used mainly to estimate the AME of cereal grains [ 4 ], is based on feeding the test ingredient as the sole source of energy in the assay diet. A limitation of this method is that it cannot be used for longer feeding periods due to the nutritionally unbalanced assay diet.…”

Section: Introductionmentioning

confidence: 99%

“…Estimation of AME of a feed ingredient, therefore, can vary depending on the methodology [ 9 , 12 , 13 ]. In our previous study [ 4 ], the direct method was employed to determine the AME of wheat, sorghum, barley, and corn at different ages (1–6 weeks) of broiler chickens. It was found that broiler age has a substantial influence on the AME and nitrogen-corrected AME (AMEn) of all grains, but the effect varied depending on the grain type.…”

Section: Introductionmentioning

confidence: 99%

“…It was found that broiler age has a substantial influence on the AME and nitrogen-corrected AME (AMEn) of all grains, but the effect varied depending on the grain type. The aim of the present study was to determine the impact of age on AMEn of the same batch of cereal grains (wheat, sorghum, barley, and corn) as those used in a previous study [ 4 ] for broiler chickens using the substitution method.…”

Section: Introductionmentioning

confidence: 99%

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Influence of Broiler Age on the Apparent Metabolizable Energy of Cereal Grains Determined Using the Substitution Method

Khalil

Abdollahi

Zaefarian

et al. 2022

Animals

Self Cite

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The present study investigated the influence of broiler age on the AMEn of wheat, sorghum, barley, and corn using the substitution method at six different ages (days 7, 14, 21, 28, 35, and 42). A corn-soybean meal basal diet was formulated and, the test diets were developed by replacing (w/w) 300 g/kg of the basal diet with wheat, sorghum, barley, or corn. Bird age influenced (p < 0.001) the AMEn of wheat and sorghum but had no effect (p > 0.05) on those of barley and corn. The AMEn of wheat increased with age (p < 0.001) from 12.53 MJ/kg DM in week 1 to 14.55 MJ/kg DM in week 2, then declined subsequently, but no linear or quadratic responses were observed. The AMEn of sorghum demonstrated a quadratic response (p < 0.05), increasing from 12.84 MJ/kg DM in week 1 to 13.95 MJ/kg DM in week 2, and then plateauing to week 6. Overall, the present results suggest that the effect of broiler age on the AMEn varies depending on the grain type. The current data suggest that the application of age-dependent AME or AMEn of wheat and sorghum will lead to more precise feed formulations.

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Comparison of metabolizable energy values of wheat, paddy, and brown rice in roosters determined by free‐feeding and tube‐feeding methods

Li,

Bai,

Liu

et al. 2023

Animal Research and One Health

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The objective of this study was to evaluate the impact of the determination methods (free feeding [FF] and tube feeding [TF]) on the available energy of ingredients (wheat, paddy, and brown rice). A total of 101 adult Hy‐Line Brown roosters (35 weeks old) with an initial body weight of 2.72 ± 0.21 kg were used, in which 96 roosters were randomly assigned to the FF group and TF group, and the remaining five birds were selected to determine the endogenous energy loss. Each group consisted of 12 dietary treatments. In the FF group, each diet treatment comprised 2 replicates with 2 birds per replicate and 4 replicates with 1 bird per replicate for each diet in the TF group. The 12 dietary treatments included a basal diet (BD) and 11 test diets, in which wheat, paddy, and brown rice replaced 30% corn, soybean meal, and wheat bran in the BD. The experiment was performed three times. There was a significant effect of source on apparent metabolizable energy (AME) and true metabolizable energy (TME) in paddy (p < 0.05). Results showed that AME in wheat, paddy, and brown rice measured by the FF method were greater than those values gained by the TF method (p < 0.05). The average AME and TME values were 3537, 3140, and 3893 kcal/kg dry matter (DM) and 3555, 3163, and 3933 kcal/kg DM for wheat, paddy, and brown rice, respectively, measured by the FF method. The means of AME and TME evaluated by the TF method were 3270, 2988, and 3764 kcal/kg DM and 3642, 3357, and 4135 kcal/kg DM for wheat, paddy, and brown rice, respectively. In conclusion, the determination method has a considerable effect on available energy, and the TF method underestimates the AME of ingredients.

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Apparent metabolizable energy of cereal grains for broiler chickens is influenced by age

Cited by 23 publications

References 42 publications

Nutrition and Digestive Physiology of the Broiler Chick: State of the Art and Outlook

Nutrition and Digestive Physiology of the Broiler Chick: State of the Art and Outlook

Influence of Broiler Age on the Apparent Metabolizable Energy of Cereal Grains Determined Using the Substitution Method

Comparison of metabolizable energy values of wheat, paddy, and brown rice in roosters determined by free‐feeding and tube‐feeding methods

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