Interaction between fat type and lysolecithin supplementation in broiler feeds

Area of Science:

• Animal Nutrition
• Poultry Science
• Digestive Physiology

Background:

• Lysolecithins enhance nutrient absorption in poultry, especially fats.
• Lysolecithin composition varies based on production source and conditions.
• Understanding lysolecithin-fat interactions is crucial for optimizing poultry diets.

Purpose of the Study:

• To investigate the impact of lysolecithin composition and fat type on nutrient digestibility in broilers.
• To evaluate the in vitro and in vivo effects of soybean and rapeseed lysolecithin on fat digestion.
• To determine if lysolecithin's molecular composition influences its efficacy with different fats.

Main Methods:

• In vitro fat digestion model using soybean oil and pig lard with soybean or rapeseed lysolecithin.
• In vivo digestibility trial with 108 broilers fed diets with soybean oil or pig lard, supplemented with lysolecithin.
• Analysis of dry matter digestibility, nitrogen retention, and apparent metabolizable energy corrected for nitrogen balance (AMEn).

Main Results:

• In vitro, pig lard showed lower digestibility than soybean oil. Lysolecithin supplementation increased pig lard hydrolysis.
• In vivo, pig lard diets resulted in lower dry matter digestibility, nitrogen retention, and AMEn compared to soybean oil diets.
• Lysolecithin improved dry matter digestibility, nitrogen retention, and AMEn when diets contained pig lard, with no significant impact from lysolecithin composition.

Conclusions:

• Lysolecithin supplementation significantly improves nutrient utilization in broilers, especially when diets contain pig lard.
• The benefits of lysolecithin in poultry diets are strongly influenced by the type of fat included.
• Lysolecithin's molecular composition did not affect its efficacy in improving fat digestibility in this study.