Estimation of apparent ileal digestibility of amino acids and basal endogenous losses in broilers fed cereals: a meta-analysis
- Period: 2015-02-03 2017-01-31
Ownership
Keywords
Volaille
Overview
Highlights :
- There is strong evidence of a relationship between AA digestibility and proximal components (CP, tAA, NDF, antinutritional factors)
- Crude protein can be used as predictor of amino acid digestibility in wheat and barley, but not for soybean meal or meat and bone meal.
- Dietary amino acid content is however a better predictor of amino acid digestibility
- Basal endogenous losses seems to be influenced by crude fiber and anti-nutritional factors
Project presentation
The objective of this study was to estimate apparent amino acid digestibility of the main cereals used in broiler diets based on their dietary crude protein and total amino acid content, relationship, in which the intercept represent total endogenous losses.
A meta-analysis was performed using a database which included 49 publications, totalizing 370 dietary treatments published from 1999 to 2013 and reporting values of apparent ileal digestibility, crude protein and amino acid content in cereals, in broilers. Models take into account experiment and cereal (corn, sorghum, wheat and barley) as fixed effect and crude protein or amino acids as independent variables.
The results show that crude protein can be used as predictor of amino acid digestibility in wheat and barley but, as expected, dietary amino acid content is a better predictor and allows studying endogenous losses.
