Determination and prediction of standardized ileal amino acid digestibility of wheat bran in broiler chickens

Xingbo Liu; Xianglong Yun; Zichen Cheng; Yuming Guo; Jianmin Yuan; Wei Nie

doi:10.5713/ab.24.0003

Animal Bioscience (Oct 2024)

Determination and prediction of standardized ileal amino acid digestibility of wheat bran in broiler chickens

Xingbo Liu,
Xianglong Yun,
Zichen Cheng,
Yuming Guo,
Jianmin Yuan,
Wei Nie

Affiliations

Xingbo Liu: National Key Laboratory of Animal Nutrition, College of Animal Science and Technology, China Agricultural University, 100193, Beijing, China
Xianglong Yun: National Key Laboratory of Animal Nutrition, College of Animal Science and Technology, China Agricultural University, 100193, Beijing, China
Zichen Cheng: National Key Laboratory of Animal Nutrition, College of Animal Science and Technology, China Agricultural University, 100193, Beijing, China
Yuming Guo: National Key Laboratory of Animal Nutrition, College of Animal Science and Technology, China Agricultural University, 100193, Beijing, China
Jianmin Yuan: National Key Laboratory of Animal Nutrition, College of Animal Science and Technology, China Agricultural University, 100193, Beijing, China
Wei Nie: National Key Laboratory of Animal Nutrition, College of Animal Science and Technology, China Agricultural University, 100193, Beijing, China

DOI: https://doi.org/10.5713/ab.24.0003
Journal volume & issue: Vol. 37, no. 10
pp. 1788 – 1798

Abstract

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Objective The objective of this experiment was to determine the standard ileal digestibility (SID) of amino acid (AA) in 10 different sources of wheat bran fed to broilers and establish the SID AA prediction based on the chemical composition. Methods A total of 660 1-day-old broilers were randomly divided into 11 treatments with 6 replicates of 10 chickens each. Diets included 10 semi-purified mash diets and 1 nitrogen-free diet. Titanium dioxide (TiO2) 0.50% was used as an indigestible index. On day 13, 6 chickens from each replicate were selected for slaughter to collect ileal contents. On day 28, 4 chickens from each replicate were selected for slaughter to collect ileal contents. Results Results showed that the coefficient of variation of the conventional nutrients (except for gross energy, and dry matter) and all AAs was greater than 8.00%. The average SID of essential AA in wheat bran for 13-day-old broilers was 37.24% and the average SID of nonessential AA was 42.02%; the average SID of essential AA for 28-day-old broilers was 67.13% and the average SID of nonessential AA was 69.51%. A correlation was observed (p<0.05) between most SID AA and crude protein (CP), crude fiber (CF), acid detergent fiber (ADF), and ash at day 13. A correlation was observed (p<0.05) between most SID AA and CF, and ADF at day 28. The R2 value of stepwise regression equations for predicting the SID AA at day 13 and day 28 was best for glutamic acid (R2 = 0.97 using CP, ash, CF, ether extract (EE), and neutral detergent fiber [NDF]) and lysine (R2 = 0.74 using ash, ADF, EE, and NDF), respectively. Conclusion In conclusion, broiler age had a significant effect on the SID AA values of wheat bran. The chemical composition of wheat bran varied widely between sources, and CP, CF, ADF, NDF, and ash were reasonable predictors of the SID AA of wheat bran.

Published in Animal Bioscience

ISSN: 2765-0189 (Print); 2765-0235 (Online)
Publisher: Asian-Australasian Association of Animal Production Societies
Country of publisher: Korea, Republic of
LCC subjects: Science: Zoology
Website: https://www.animbiosci.org/index.php

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