Effect of L-Arginine on Productive Performance, Egg Quality Parameters, Blood and Hormone Parameters of Laying Hens in Late-phase of Production

Abstract

This experiment was conducted to investigate effects of l-arginine on productive performance and egg quality parameters, blood and hormone parameters of laying hens in late phase of production for 8 weeks. Forty eight Hy-Line W-36 were used in a completely randomize design with four level of l-arginine (1/20=control diet, 1/32, 1/44 and 1/56 percent) and four replicate from 92-98 weeks of age. Layers were weighed at 90 week of age and randomly distributed into 16 cages in order to have a similar pen body weight. The performance data were recorded daily, whereas the egg quality traits were determined biweekly. At the end of experiment 2 eggs from each cage were collected for egg yolk cholesterol analysis. Supplementation of l-arginine in diet did not have significant effect on productive performance and egg shell quality in layers. Furthermore, the addition of l-arginine to diet did not have significant effect on the egg yolk cholesterol (P> 0.05). The results of this study showed that supplementation of larginine improved Hough unit and yolk cholesterol and blood progesterone with no adverse effect on productive performance.

Influence of Supplementation of Dietary with Varying Levels of L-carnitine on Laying Performance And Egg Quality Parameters in Different Lines of Kurdish Quails

“…Additionally, these researchers showed that L-carnitine supplementation had no significant effect on yolk index and yolk color score. Kazemi-Fard et al, (2015) did not find any significant impact on egg yolk, yolk color, and yolk quality index in hens fed a diet containing 50 mg/kg of Lcarnitine compared to hens on a control diet. The study also found a significant interaction (p≤0.01) between the addition of LC and lines on yolk weight, yolk diameter, yolk index, and yolk/albumen ratio, while yolk height and yolk percentage were not significantly affected by Lcarnitine supplementation.…”

“…Similar results were found by Rizk et al,(2022) found that adding L-carnitine (300 and 450 mg/kg food) to the broiler diet significantly increased (P≤0.05) egg laying compared to the control diet. However, Corduk and Sarica, (2008); Kazemi-Fard et al, (2015) concluded that dietary intake of 100 and 150 mg/kg L-carnitine increased egg production in laying hens by 7.81 and 10.74%, respectively, because this additive (L-carnitine) improves lipolysis and liver protection. Neuman et al, (2002) found that Lcarnitine supplementation increased mitochondrial energy production and in turn, laying intensity in these birds.…”

“…Zhai et al, (2008) discovered that adding L-carnitine to hen diets beginning at hatch had no effect. Furthermore, Kazemi-Fard et al, (2015) concluded that dietary L-carnitine supplementation had no influence on egg shell quality measures such as shell weight and shell thickness. The results of interaction between Line and addition of LC on egg shell quality characteristics of quail noticed a significant difference in each of shell thickness, egg surface area, and unit surface are shown in (Table 6).…”