INFLUENCE OF THE ZINC METHIONATE AND ZINC SULPHATE ON SOME PRODUCTION INDICATORS IN BROILER CHICKENS
S. Ivanova, Z. Shindarska, D. Dimitrova, V. Dilova, M. Marinova
Резюме: The study is influence of zinc methionate (Zn-Met) and zinc sulphate heptahydrate (ZnSO4.7H2O) on some productive indicators in broiler chickens of 15-days old. The studied products were analysed by atomic absorption method and have a chemical composition as follows: Zinc methionate – 14.6% zinc, 16.6% H2O and 68.8% methionine; Zinc sulphate heptahydrate – 22.7% zinc. Fifty-six broiler chickens were used, divided in 7 groups of 8 birds in the group, which received zinc methionate and zinc sulfate for 35 days at the following concentrations: 60 ppm (I and IV group), 300 ppm (II and V group ), 600 ppm (III and VI group) and VII group – a control. The base feed contained an average of 41.54 ± 1.84 ppm Zn. In connection with the target
were held and rheological studies of investigational products with a view to exploring their options for mixing with feed. The best results in terms of rheological signs (angle of repose, flow rate, Hausner,s factor) showed zinc methionate by its use as a feed additive for broiler chickens was observed increase in weight gain and better feed conversion in compared with zinc sulphate. With the highest feed consummation were chickens in the control group (3.771 kg/chicken), and with the lowest – birds, receiving zinc
methionate, at a dosage of 60 ppm (3.641 kg/chicken).The results of ingested fodder (average daily from chicken) are analogous to the total consummation. The adopted energy (average per day from chicken) in the different groups was in the range of 283–293 kcal, a adopted protein – 22.18–23.04 g/ kg. The final weight was in the range of 1.811 kg (the control group) to 1,995 kg for the group, which received a lower concentration of zinc methionate (60 ppm). Highest carcase weight was observed in I group (Zn-Met 60 ppm) – 1.282 kg, and the lowest – in VII group (control) − 1.134 kg.
were held and rheological studies of investigational products with a view to exploring their options for mixing with feed. The best results in terms of rheological signs (angle of repose, flow rate, Hausner,s factor) showed zinc methionate by its use as a feed additive for broiler chickens was observed increase in weight gain and better feed conversion in compared with zinc sulphate. With the highest feed consummation were chickens in the control group (3.771 kg/chicken), and with the lowest – birds, receiving zinc
methionate, at a dosage of 60 ppm (3.641 kg/chicken).The results of ingested fodder (average daily from chicken) are analogous to the total consummation. The adopted energy (average per day from chicken) in the different groups was in the range of 283–293 kcal, a adopted protein – 22.18–23.04 g/ kg. The final weight was in the range of 1.811 kg (the control group) to 1,995 kg for the group, which received a lower concentration of zinc methionate (60 ppm). Highest carcase weight was observed in I group (Zn-Met 60 ppm) – 1.282 kg, and the lowest – in VII group (control) − 1.134 kg.
Ключови думи: broiler chickens; growth; weight development; zinc; zinc methionate; zinc sulphate
Дата на публикуване: 2018-03-14
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