Effect of graded levels of fiber from alfalfa meal on apparent and standardized ileal digestibility of amino acids of growing pigs

Abstract

Two experiments were conducted to determine the effects of fiber level from alfalfa meal and sampling time on the apparent ileal digestibility (AID) and standardized ileal digestibility (SID) of amino acids (AAs) in growing pigs. A total of 24 ileal-cannulated pigs (Duroc×(Large White×Landrace), body weight (21.4±1.5) kg) were randomly allotted to 4 treatments. The pigs were provided a corn-soybean meal-control diet or a diet containing 5, 10 or 20% of alfalfa meal during two 10-d experimental periods. The AID of AA was measured. Six ileal-cannulated pigs were fed a protein-free diet in order to estimate the endogenous protein losses and SID of AA. Ileal AA digestibility was not affected by inclusion of 5% or 10% alfalfa meal in the diet (P>0.05). The AID of His,

Comparative digestibility of nutrients and amino acids in high-fiber diets fed to crossbred barrows of Duroc boars crossed with Berkshire×Jiaxing and Landrace×Yorkshire

“…The result was caused by a higher fiber level in rice bran and alfalfa meal than in wheat middlings, because the concentration of dietary fiber has a negative effect on the digestibility of AA and nutrients [ 19 ]. Chen et al [ 20 ] reported that the corn-soybean meal diet containing 10% of alfalfa meal did not affect ileal AA digestion, but increasing the proportion of alfalfa meal from 12.3% to 21.4% in the control diet induced a linear reduction in AID of most AA. These results indicated that total ileal endogenous AA losses tended to increase with high concentration of fiber in diets fed to growing pigs [ 21 ], which is another reason for lower AID of AA in rice bran and alfalfa meal diets than in wheat middlings diet.…”