The effect of dietary level of soybean oil and palm oil on apparent ileal amino acid digestibility and postprandial flow patterns of chromic oxide and amino acids in pigs

A study was conducted to evaluate the apparent ileal digestibilities of amino acids in pigs (initial weight 78 kg) fed diets supplemented with either soybean or palm oil, at either 100 or 200 g kg–1 diet. A control diet with no added fat was also evaluated. All diets contained 5 g chromic oxide kg–1. The pigs were surgically fitted with a simple T cannula at the distal ileum, and were allowed to adapt to each experimental diet for 5 d. This was followed by 1 d of continuous collection of ileal digesta between feedings, and a second day of continuous collection separated into six 2-h postprandial time blocks to determine postprandial flow patterns of chromic oxide and amino acids. The apparent ileal leucine and arginine digestibilities were improved (P < 0.05) by 3.8 and 3.6%, respectively, with 200 g soybean oil kg–1 diet. Linear improvements (P < 0.05) were found in the apparent ileal digestibilities of serine, histidine, arginine, tyrosine, and leucine when 100 and 200 g soybean oil kg–1 diet were suppl...