Abstract
Evaluation of Supplemental Fat Sources and Pre-Farrow Essential Fatty Acid Intake on Lactating Sow Performance and Essential Fatty Acid Composition of Colostrum, Milk, and Adipose Tissue
Highlights
Nutrient requirements for modern lactating sows have increased dramatically to support growth of larger and heavier litters that result from genetic advancements
Both linoleic acid (LA) and ALA composition of milk at weaning was greater for sows that consumed diets with soybean oil compared to beef tallow
Concentrations of LA and ALA within adipose tissue were higher at weaning when sows consumed diets with high essential fatty acids (EFA) compared to low EFA
Summary
Nutrient requirements for modern lactating sows have increased dramatically to support growth of larger and heavier litters that result from genetic advancements. Supplemental fat sources are an effective and widely accepted method to increase energy density of sow diets and provide essential fatty acids (EFA). Research conducted since by Rosero et al (2016)[3] suggests that a minimum dietary EFA intake must incorporate both 100 g/d LA and 10 g/d ALA to maximize reproductive performance of lactating sows. The first objective of this trial was to determine EFA status of lactating sows fed diets containing no supplemental fat (low EFA), beef tallow (low EFA), or soybean oil (high EFA) through evaluation of colostrum, milk, and adipose tissue fatty acid composition. The second objective of this experiment was to evaluate the timing of feeding low or high EFA diets prior to farrowing (approximately d 107 or 112 of gestation) on colostrum and milk EFA composition
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