Age dependent energy and digestible amino acids of common Australian feedstuffs

Massey University

  • Project code: PRJ-011835

  • Project stage: Closed

  • Project start date: Thursday, March 12, 2020

  • Project completion date: Sunday, April 30, 2023

  • Journal Articles From Project: Apparent metabolizable energy of cereal grains for broiler chickens is influenced by age Poultry Science Journal (Issue: 00 on 1/7/2021), Khalil, M. M., Abdollahi, M. R., Zaefarian, F., Chrystal, P. V., Ravindran, V. (2022) Influence of age and dietary cellulose levels on ileal endogenous energy losses in broiler chickens. Poultry Science (Issue: 101:101948. on 10/5/2022), Khalil, M. M., Abdollahi, M. R., Zaefarian, F., Chrystal, P. V., Ravindran, V. (2022) Influence of broiler age on the apparent metabolizable energy of cereal grains determined using the substitution m Animals (Issue: 2022, 12, 183. on 9/3/2022), Khalil, M. M., Abdollahi, M. R., Zaefarian, F., Chrystal, P. V., Ravindran, V. (2021) Apparent metabolizable energy of cereal grains for broiler chickens is influenced by age. Poultry Science (Issue: 100:101288. on 1/12/2021), Barua, M., Abdollahi, M. R., Zaefarian, F., Wester, T. J., Girish, C. K., Chrystal, P. V., Ravindran, V. (2021) Influence of age on the standardized amino acid digestibility of corn and barley in broi Animals (Issue: 2021, 11, 3575. on 24/11/2021), Barua, M., Abdollahi, M. R., Zaefarian, F., Wester, T. J., Girish, C. K., Chrystal, P.V., Ravindran, V. (2021) Basal ileal endogenous amino acid flow in broiler chickens as influenced by age. Poultry Science (Issue: 100:101269. on 16/8/2021), Barua, M., Abdollahi, M. R., Zaefarian, F., Wester, T. J., Girish, C. K., Chrystal, P. V., Ravindran, V. (2021) An investigation into the influence of age on the standardized amino acid digestibility Poultry Science (Issue: 100:101466. on 8/2/2021), Basal ileal endogenous amino acid flow in broiler chickens as influenced by age Poultry Science (Issue: 100: 101269 on 13/5/2021), An investigation into the influence of age on the standardised ileal amino acid digestibility of wheat and sorghum in broilers Poultry Science (Issue: 100: 101466 on 29/8/2021), Influence of age on the standardised ileal amino acid digestibility of corn and barley in broilers Animals (Issue: 11: 3575 on 16/12/2021), Influence of age on the standardized ileal amino acid digestibility of soybean meal and canola meal in broilers Animal Nutrition (Issue: 00 on 1/6/2023), Apparent metabolizable energy of cereal grains for broiler chickens is influenced by age Poultry Science (Issue: 100:101288 on 21/5/2021), Influence of broiler age on the apparent metabolizable energy of cereal grains determined using the substitution method Animals (Issue: 12(2), 183 on 13/1/2022), Influence of age and dietary cellulose levels on ileal endogenous energy ‎losses in broiler chickens Poultry Science (Issue: 101: 101948 on 26/4/2022), Broiler age influences the apparent metabolizable energy of soybean meal and canola meal Animals (Issue: 13, 219 on 20/1/2023), Influence of age on the standardized ileal amino acid digestibility of soybean meal and canola meal in broilers Animal Nutrition (Issue: Submitted on 30/12/2023)

  • National Priority: CME-Priority 3-Contributing to efficient and secure chicken production systems

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Summary

The principal role of feed ingredients is to provide the nutrients that can be utilised for maintenance and productive functions by the bird at different ages. Phase-feeding, a form of precise-feeding, is a feeding system in which energy content of the diet is increased and dietary amino acids (AA) levels are reduced steadily over time in an attempt to reduce costs associated with excess dietary protein. The potential of phase feeding, however, is not being effectively harnessed due, among others, to the lack of information on nitrogen-corrected apparent metabolisable energy (AMEn) and digestible AA content of different feed ingredients for broilers of different age groups. Currently, the evaluation of AMEn and AA digestibility in ingredients for broiler chickens is conducted using older birds (typically 28-35 days of age) and the determined estimates are applied to all the phases of bird’s growth. The application of a single value of AMEn and digestible AA to all growth phases of broilers is clearly fraught with serious flaws and highlights the need for age-dependent estimates for use in feed formulations. Therefore, the fundamental aim of this project is to explore the impact of bird age on the nutrient utilisation in broilers. In a series of studies, we will determine age dependent AMEn and standardised ileal digestible (SID) AA values for common raw materials used in the Australian meat chicken industry. This project will investigate three cereals (wheat, sorghum and barley) and three protein sources (soybean meal, canola meal and meat and bone meal).

Program

Chicken Meat

Research Organisation

Massey University

Objective Summary

The results will provide clear guidelines to nutritionists to use in formulating appropriate phase-feeding diets. The outcome will be increased efficiency of chicken meat production and reduced feed waste and resultant pollution. Our proposal is aligned with priority research ideas listed for 2018/2019 and is relevant to addressing the current industry objective to “Increase the productivity and efficiency of chicken meat production”. The major objective of this project is to determine AMEn and SID values of AA in three cereals commonly used in Australia (wheat, sorghum and barley) and three protein sources (soybean meal, canola meal and meat and bone meal) at different ages of broilers. Refining AMEn and SID values of AA for bird age will allow more accurate formulation of broiler diets for different growth phases and has the potential to reduce nutrient wastage and emissions to the environment whilst improving broiler performance.