Bioavailability of Tryptophan Biomass for Laying Hens

Area of Science:

• Animal Nutrition
• Biochemistry
• Poultry Science

Background:

• L-tryptophan is an essential amino acid crucial for poultry health and productivity.
• Evaluating alternative L-tryptophan sources, like biomass, is vital for optimizing feed formulations.
• Bioequivalence studies ensure that different sources provide comparable nutritional value.

Purpose of the Study:

• To assess the bioequivalence of L-tryptophan biomass 60% compared to a standard L-tryptophan source (98%) for laying hens.
• To determine the relative bioavailability value (RBV) of L-tryptophan biomass 60% using the slope ratio method.
• To evaluate the impact of L-tryptophan sources on various production and physiological parameters in laying hens.

Main Methods:

• Two concurrent assays involving 216 laying hens were conducted.
• Direct comparison method and slope ratio method were employed to evaluate bioequivalence and RBV.
• Analysis of variance (ANOVA) and linear regression were used to analyze data on feed intake, egg production, body composition, and egg quality parameters.

Main Results:

• The direct comparison method showed no significant differences (p > 0.05) between L-tryptophan sources using ANOVA.
• The slope ratio method indicated that treatments affected egg production and daily tryptophan intake.
• The relative bioavailability value (RBV) of L-tryptophan biomass 60% was determined to be 100%, with no significant impact on egg quality.

Conclusions:

• L-tryptophan biomass 60% is bioequivalent to L-tryptophan 98% for laying hens.
• The utilization of L-tryptophan biomass 60% in laying hen diets is effective and comparable to the standard source.
• This finding supports the use of L-tryptophan biomass as a viable alternative in poultry nutrition.