Effect of Supplementation of Rumen-Protected Amino Acids to Barki Sheep on Some Blood Parameters

Abstract

The objective of this study was to evaluate the effects of supplementing a traditional diet with rumenprotected (RP) either methionine (MET) or lysine (LYS) or their combination, on some physiological responses of ewes. Twenty-four adult Barki ewes were used were divided into four groups (6 ewes for each). The first group (Control) was fed only the control diet. The second group (LYS) fed the control diet and rumen-protected LYS (6g Lysi pearl /kg concentrate i.e. 3g /animal/day). The third group (MET) was fed the control diet and rumen-protected MET (14g Smartamin/kg concentrate i.e. 7g /animal/day). The fourth group (MIX) was fed the control diet and mixture of 3g LYS and 7g MET/animal/day. The experiment lasted for six months. Blood total proteins, urea, creatinine, total cholesterol, glucose, alanine aminotransferase, aspartate aminotransferase, alkaline phosphatase and lactate dehydrogenase were detected. Total lipids (TL), high-density lipoproteins (HDL), low-density lipoproteins (LDL), and some plasma essential and non-essential amino acids were also analyzed.

Impact of adding dietary different levels of protected methionine on wool characteristics, ultrastructure, and blood components of Barki sheep

“…Glucose and free fatty acids concentrations are good indicators of the energetic status. The supply of methionine enhanced the capacity of the liver in exporting triacylglycerols in the form of very-low-density lipoprotein and helping improve the negative effect of fatty acid collecting in the liver (Younis and Abd-Elazem 2019). However, Li et al (2015) did not find any such effects in blood cholesterol and triglycerides in lambs receiving an estimated dose of 37 to 116 mg/kg.…”

“…The obtained values of plasma content of methionine in this study agree with Youssef (2017), who measured plasma content of methionine in Barki sheep and the maximum value was (0.40%±0.02). Also, Younis and Abd-Elazem (2019) found that adding protected amino acids lysine or/and methionine caused a significant increase in lysine, glutamic, and arginine concentrations, while it caused a significant decrease in proline and ammonia concentrations. Ramadan et al, (2017) found that concentrations of arginine, glutamic, and lysine in Barki sheep increased significantly when protected amino acids methionine and lysine were supplemented, for diets ewes but ammonia and proline concentrations decreased significantly.…”

“…It becomes more important when ruminants achieve their optimum growth and peak production because their nutrient requirements vary according to their physiological statuses, such as growth, pregnancy, and lactation. For ruminants fed with low-quality diets with little protein, adding high-quality protein, or rumen-protected amino acids, particularly methionine, enhanced their performance (Younis and Abd-Elazem, 2019).…”