Effect of zinc concentration and source on performance, tissue mineral status, activity of superoxide dismutase enzyme and lipid peroxidation of meat in broiler chickens

Abstract

The present experiment was conducted to investigate the effect of feeding different concentrations and the source of zinc (Zn) on the performance, tissue mineral status, superoxide dismutase (SOD) enzyme activity and meat quality in 0–4-week-old broiler chicks. Dietary treatments included the corn–soybean meal-based diet (control) and the basal diet supplemented with Zn at 20, 50 or 80 mg/kg, added as ZnSO4, Zn-methionine or Zn-enriched yeast. The results showed that birds fed Zn-supplemented diets had higher average weight gain and average feed intake than did birds fed the control diet (P < 0.01). At the end of the experiment, the Zn deposition in pancreas, liver and tibia increased (P < 0.01), regardless of the source, in response to increasing dietary Zn concentrations, whereas plasma Zn status was significantly increased by the highest Zn supplementation level. The main effect of Zn supplementation level was significant for the activities of Cu and/or Zn SOD in the liver and pancreas (P < 0.01). As broiler given 50 mg Zn had higher tissue SOD activity than did broilers fed the other treatment diets. Furthermore, Zn supplementation at up to 50 mg/kg significantly increased (P < 0.01) Zn accumulation and SOD activity and decreased lipid peroxidation in muscles around the femur bone. Results from the present study demonstrated that supplementation with 50 mg Zn may be sufficient for normal broiler growth to 28 days of age and the dietary inclusion of organic Zn could be utilised more effectively than that of inorganic sources.

Effect of Different Levels and Sources of Dietary Copper, Zinc and Manganese on the Performance and Immune and Redox Status of Turkeys

“…Reduction of Zn addition to turkey diet from 100 to 50 and 10 mg/kg [31], as well as the lack of Zn addition to chickens diet [32] was not found to affect growth performance. Azad et al [33] reported that a lack of Zn supplementation had an adverse effect on rearing results.…”

Intestinal digestibility of selected minerals, growth performance and meat quality in turkeys fed diets supplemented with different sources and levels of zinc

“…According to some authors (Ding et al, 2009;Ahmadi et al, 2013;Zhao et al, 2014), the replacement of mineral Zn sources with Zn nanoparticles improves the growth performance of broiler chickens. The results of other studies were inconclusive: the addition of 20-80 mg Zn improved the performance of chickens when compared with birds fed the non-supplemented diet (Azad et al, 2017), whereas dietary supplementation with approximately 60 mg Zn/kg (Wang et al, 2002;Bun et al, 2011) or even 160 and 320 mg Zn/kg (Sunder et al, 2008) had no effect on chicken performance. Mahammadi et al (2015) found that dietary supplementation with 80 mg/kg of zinc-nano-sulfate reduced feed intake and BW of broiler chickens.…”

Effects of the dietary zinc source and vitamin E level on live weight and carcass yield and meat quality in male broilers reared under chronic cyclic heat stress conditions in the finisher phase

“…In addition, Liu et al (2015) reported that increased dietary supplementation of Zn can upregulate the expression of Zn-containing superoxide dismutase. As the negative impact of high ambient temperatures on meat quality is mainly caused by oxidative damage to the skeletal muscle ( Zaboli et al, 2019 ), the improved quality traits when supplying ZnAA could be ascribed to improved support of the antioxidant defense system ( Liu et al, 2015 ; Kamran Azad et al, 2018 ). Indeed, a previous study performed by De Grande et al (2020) showed that ZnAA could decrease the activity of the glutathione peroxidase in plasma on day 36, while malondialdehyde levels did not differ, indicating that ZnAA might better support the oxidative status.…”