Optimization of dietary zinc for egg production and antioxidant capacity in Chinese egg-laying ducks fed a diet based on corn-wheat bran and soybean meal

Chen, W.; Wang, S.; Zhang, H. X.; Ruan, D.; Xia, Weiguang; Cui, Yiyan; Zheng, Chuntian; Lin, Yan

doi:10.3382/ps/pex032

Cited by 21 publications

(9 citation statements)

References 47 publications

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“…Attia et al [ 62 ] showed that in male White Pekin ducks, maximizing the body weight gain from 1 to 56 d requires diets supplemented with 30 mg Zn/kg, whereas 120 mg Zn/kg is needed to reduce body fat deposition and improve meat quality. However, 30 mg Zn/kg in the diet is adequate for improving the performance of Longyan laying ducks during the peak laying period [ 63 ].…”

Section: Introductionmentioning

confidence: 99%

Nutritional requirements of meat-type and egg-type ducks: what do we know?

Fouad

Ruan²,

Wang³

et al. 2018

J Animal Sci Biotechnol

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The demand for duck meat, duck eggs, and associated products is increasing each year. Classic and modern selection programs have been applied to enhance the economic traits of ducks to satisfy the requirements of consumers and enhance the incomes of producers. The nutritional requirements of unselected ducks may not be adequate, however, to fulfill the potential productivity performance of modern birds, including both meat-type and egg-type ducks. In particular, an imbalanced diet is associated with low productive performance and signs of nutritional deficiency (if insufficient nutrients are supplied), as well as with high feed costs and manure problems that reflect flock health and welfare (if excessive nutrients are supplied). Thus, the main aim of this review is to summarize the results of previous studies that estimated the nutrient requirements of meat-type and egg-type ducks in order to evaluate current knowledge and to identify further issues that need to be addressed. In addition, the results obtained in previous studies are compared in order to understand how to lower commercial feed costs, fulfill the genetic potential of selected ducks, protect the environment from pollution, and satisfy the welfare and health needs of ducks.

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Section: Introductionmentioning

confidence: 99%

Nutritional requirements of meat-type and egg-type ducks: what do we know?

Fouad

Ruan²,

Wang³

et al. 2018

J Animal Sci Biotechnol

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“…MDA is an indicator of lipid peroxidation that indicates the oxidative damage of cells [25]. Regardless of the source, supplementation of Zn can promote the formation of metallothionein, remove free radicals in the body, inhibit lipid peroxidation in vivo, reduce the content of MDA, and increase Cu/Zn-SOD [26]. In our previous studies, we found that 40 and 80 mg/kg MHA-Zn group had a higher content of zinc in the liver than the control group, and the level of metallothionein (MT) mRNA expression in the liver was highest in the 80 mg/kg MHA-Zn group [10].…”

Section: Discussionmentioning

confidence: 99%

Effects of the Methionine Hydroxyl Analogue Chelate Zinc on Antioxidant Capacity and Liver Metabolism Using 1H-NMR-Based Metabolomics in Aged Laying Hens

Xing

et al. 2019

Animals

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Simple SummaryZinc, an essential trace element for laying hens, plays an important role in biological processes, such as growth, tissue growth and repairment, skeletal development, and immune competence, which also has better effects on growth performance, biochemical indexes, and antioxidant capacity. Our previous work has shown that methionine hydroxyl analogue chelated zinc (MHA-Zn) has better effects on eggshell quality, the apparent retention of minerals and nutrients, trace element deposit, and metallothionein (MT) mRNA expression. The objective of the current study was to investigate the effects of different levels of MHA-Zn on antioxidant capacity and liver metabolism of aged laying hens. The results suggest that dietary supplementation of MHA-Zn levels at 80 mg/kg has better effects on antioxidant capacity and liver metabolism, as well as homeostasis of the body. AbstractThis study aimed to investigate the effects of different levels of methionine hydroxyl analogue chelated zinc (MHA-Zn) on antioxidant capacity and liver metabolism of aged laying hens. A total of 960 57-week-old layers were fed a basal diet (Zn: 35.08 mg/kg) without extra zinc for two weeks, and then allocated to four treatments consisting of eight replicates of 30 birds each for 14 weeks. Four levels of Zn (zinc sulfate (ZnSO4): 80 mg/kg; MHA-Zn: 20, 40, 80 mg/kg) were added to the diet. The results indicated that compared with inorganic zinc, organic zinc of 80 mg/kg has a significant advantage in improving the antioxidant capacity of aged hens, which increased the level of Cu/Zn-superoxide dismutase (SOD) and the total antioxidant capacity (T-AOC) in the serum and liver, and reduced the concentration of malondialdehyde (MDA) of laying hens. The serum albumen composition was significantly modified, meanwhile, the level of total protein, globulin, and urea increased remarkably, whereas serum glutamic-oxaloacetic transaminase decreased notably in 80 mg/kg MHA-Zn groups. Compared with the 20 mg/kg MHA-Zn group, the metabolic profile of 40 and 80 mg/kg MHA-Zn groups was higher than that of the inorganic zinc group. Furthermore, integrated key metabolic pathway analysis showed that 40 and 80 mg/kg MHA-Zn groups participated in the regulation of glutathione metabolism, glycine, serine, and threonine metabolism. Therefore, this study suggests that 40 and 80 mg/kg supplementation of MHA-Zn can increase the activity of Cu/Zn-SOD and T-AOC and decrease MDA; additionally the 80 mg/kg MHA-Zn group has better antioxidant capacity. Meanwhile, the enhanced MHA-Zn promoted methionine (Met) synthesis and protein metabolism.

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“…The egg shape index was calculated as (width/length) Â 100. Eggshell breaking strength was measured on the vertical axis using an Egg Force Reader (model EFR-01, ORKA Food Technology, Ramat HaSharon, Israel) (Chen et al 2017). Albumen height, yolk colour, and Haugh unit of each egg were measured on the day of collection using an Egg Analyser (model EA-01, ORKA).…”

Section: Egg Qualitymentioning

confidence: 99%