Effect of different levels of Nano Zinc Oxide on growth performance, humoral immunity, nutrient digestibilities and some blood parameters of broiler chikens

Dalir, Soudabeh and Shakouri, Mir Daryoush and Ghorbanpour, Mohammad (2018) Effect of different levels of Nano Zinc Oxide on growth performance, humoral immunity, nutrient digestibilities and some blood parameters of broiler chikens. Masters thesis, University of Mohaghegh Ardabili.

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Abstract

The current study was conducted to investigate the effect of different levels of zinc oxide nanoparticle (ZON) on growth performance, humoral immunity, nutrients digestibility, some blood parameters and tibia bone characteristics of broiler chickens. The experiment was carried out by employing a completely randomized design using 256 mixed sexed Ross 308 chickens with 4 treatments and 4 replicates of 16 bird per each for 42 days. The experimental diets included a basal diet (control), and diets containing 40, 80, 120 mg/kg ZON. Supplementation of different levels of NON in the diet had no significant effect on feed intake, weight gain and feed conversion ratio of chickens during the starter and grower periods (P>0.05). At finisher period the levels of 40,120 mg/kg ZON reduced feed intake and improved weight gain, respectively (P<0.05). At the end of the trial, only the use of 40 mg/kg ZON decreased the feed intake of chickens (P<0.05). The titer against SRBC (sheep red blood cells) and IgG were significantly increased by 80 mg/kg ZON (P<0.05), while IgM was not affected by the treatments (P>0.05). All levels of ZON significantly decreased triglyceride and VLDL cholesterol (P<0.05). Levwls 40 and 120 mg/kg ZON declined total cholesterol, LDL cholesterol, LDL cholesterol to total cholesterol and increased HDL cholesterol to LDL cholesterol and to total cholesterol (P<0.05). HDL cholesterol was only decreased by 40 mg/kg ZON (P<0.05). Supplementation of 80 and 120 mg/kg ZON significantly increased crude ash digestibility and adding 80 mg/kg ZON increased fat digestibility (P<0.05). Tibia bone dry matter, ash and morphological characteristics were not significantly affected by the treatments. The decreased feed intake and numerically improved feed conversion rate by 40 mg/kg ZON as well as an improved immunity response and crude ash and fat digestibility by 80 mg/kg ZON were shown in this study. A decrease in lipid blood parameters and no effect on tibia bone characteristics were also observed by different levels of ZON.

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