Effects of Different Levels of Lysine on Small Intestinal Villous Morphology in Starter Diet of Broiler Chickens

摘要

The purpose of this study to demonstrate the effects of lysine supplement on small intestinalmorphology of broilers chickens. In starter period control group received diet containing 1.2% lysine, Treatment1[T1] and Treatment 2[T2] groups received diet containing 1.3% and 1.4% lysine, respectively. Intestine villousmorphology examination was done by analyzing of villi's height, width, depth of crypts and the type of villous.The finding shown that as diet lysine increased, the villous height had a significant increase compared to thecontrol group. In the starter period, the growth of intestine villous width which depends on lysine density hadsignificant increase (P<0.05) compared to control group. As T2 group lysine increased (P<0.05) compared tocontrol Group, Libercuhn crypt depth had a significant increase (P<0.05). A lot of intestine villous were in a kindof leaf and tongue and also a little percent were bridge villi, Finger, Ridge and convoluted villi. In duodenum,different levels of lysine on the tongue and leaf villi had not significant effect. In the starter period, lysineincrease in T1 and T2 lead to significant decrease (P<0.05) of leaf villous compared to control but has causedto significant increase (P<0.05) of tongue villous in jejunum and ileum.