Effect of Dietary Addition of Zinc Enriched Spirulina on Growth and Physiological Performance in Growing Rabbits.

Abstract

The present experiment was carried out to evaluate the effects of Zinc-enriched Spirulina (Zn-Sp) supplementation as an organic Zn source on the growth performance, nutrients digestibility, carcass characteristics, blood parameters and economic efficiency of growing rabbits. A total of forty eight male NZW rabbits (35 days old) were allotted to four groups (12 rabbits for each), 4 replicates (3 rabbits for each). Three levels of 75 and 100 mg Zn-Sp/kg diet) were compared to a control group without Zn-Sp addition. The results have shown that dietary Zn-Sp supplementation caused an increase (P<0.05) in final live body weight at 13 weeks. Supplementation of 75 and 100 mg Zn-Sp improved (P<0.05) body weight gain compared to the control group during the whole experiment period. The increases in body weight gain were 10.93 and 10.63% for 75 and 100 mg Zn-Sp, respectively compared to the control group. On the other hand, at all experimental periods, rabbits fed diets supplemented with 75 and 100 mg Zn-Sp consumed less (P<0.05) feed intake than those fed control diet or 50 mg Zn-Sp. As well as, diets supplemented with Zn at 50, 75 and 100 mg Zn-Sp improved (P<0.05) FCR throughout the experimental period (8weeks). Dietary Zn-Sp supplementation at 100 mg led to a significant increase in all nutrients digestibility In addition; Zn-Sp supplementation had insignificant effect on the CF digestibility. Feeding rabbits on diets supplemented with Zn-Sp at a level of 100 mg/kg DM increased (P<0.05) DCP%, TDN and DE (kcal/kg) compared to the control group. The obtained results also showed that supplementing rabbit diets with Zn-Sp at each tested level increased (P<0.05) hot carcass weight, dressing percentage, total edible parts (%), serum total protein and HDL, serum Zn concentrations, total antioxidant capacity (T-AOC) levels in comparison to the control group. Conversely, a significant decrease (P<0.05) was observed in serum total cholesterol and LDL concentrations compared with the

Effects of Dietary Acacia nilotica Fruit, Zinc Oxide Nanoparticles and Their Combination on Productive Performance, Zinc Retention, and Blood Biochemistry of Rabbits

“…Al-Sagheer et al [32], who found a significant rise in dressing percentage in rabbits fed dietary supplements containing Nano-ZnO at 100 mg/kg, with no differences in the ratios of the liver, kidneys, and heart to body weight when compared to the control group. Male rabbits' liver, kidney, and heart functions were unaffected by diets containing ZnO at a dosage of 100 mg/kg [33]. In comparison to the control group, dressing, liver, and kidney percentages in rabbits fed ZnO at doses of 50, 100, 200, and 400 mg/kg diet did not differ significantly [34], in line with our results.…”

Use of zinc oxide nanoparticles in the growing rabbit diets to mitigate hot environmental conditions for sustainable production and improved meat quality

“…The reduced fat content in the meat may be due to Zn being a cofactor in the biological function as a divalent cation primarily when bound to enzymes, other proteins and plays an essential protective role in the regulation of lipid accumulation and metabolism [ 40 ]. Amer et al [ 48 ] showed increased hot carcass weight, dressing, and total edible parts% in rabbits fed Zn supplemented diets at 50, 75, and 100 mg/kg compared with the control group. In contrast, Selim et al [ 34 ] reported no change in carcass traits in rabbits fed diets supplemented with a 50, 100, 200, or 400 mg zinc oxide /kg diet.…”

Effect of Spirulina Algae Levels Supplements on The productive and Reproductive Performance of Doe Rabbits

“…Our findings are consistent with those of Adel et al [26], who reported that substituting soybean meal with SP at 20, 40, and 60% in growing rabbit diets significantly enhanced digestibility of dry matter (DMD), organic matter (OMD), crud protein (CPD), and crud fiber (CFD), but digestibility of ether extract (EED) was unaffected. Also, Amer et al [27] found that increasing zinc-enriched SP in the rations of growing rabbits improved all nutrient digestibilities, except for CFD, which not affected. However, DalleZotte et al [28] stated that rabbits fed diets containing Spirulina, Thyme or a mixture had no effect on dry matter intake (DM), body weight, or nutrient digestibilities except for EED, which was recorded as significantly lower compared with rabbits fed the control diet.…”