The Journal "Agriculture and Forestry"
Časopis "Poljoprivreda i šumarstvo"
- Since 1955 -
Year 2013, Volume 59 Issue 1
| Year : | 2013 |
| Volume : | 59 |
| Issue : | 1 |
| Authors : | Sobhan SAJADIFAR |
| Title : | EFFECT OF HIGH LEVELS OF ZINC ON PLASMA METALLOENZYME ACTIVITY AND BLOOD PARAMETERS IN BROILER CHICKS |
| Abstract : | Alkaline phosphatase is a metalloenzyme containing approximately 0.15 % zinc. One hundred and forty-four one-day-old Ross 308 broiler chicks were used in this experiment. Three zinc levels (40, 120 and 200 mg/kg) were added to the basal diet to establish the treatments. On d 21 and 42 average body weight gain (BWG), average daily feed intake (ADFI) and feed conversion ratio (FCR) were obtained by pen. At 42 d the heterophil/lymphocyte ratio (H/L), an indicator of stress in birds, was counted and plasma was used for the measurement of plasma mineral concentrations (Ca, P and Cu), cholesterol and the serum enzyme activity of alkaline phosphatase (ALP) and lactate dehydrogenase (LDH) by an automated chemistry analyser. No dietary treatment significantly altered ADFI, BWG or FCR at days 21 and 42. Both the 120 and 200 mg Zn/kg diets resulted in a significant reduction in the H/L ratio (p< 0.05). Adding additional Zn resulted in a significant decrease in blood P, Cu and cholesterol concentration (p< 0.05). Supplementing the diet of broiler chicks with additional levels of zinc resulted in significant (p< 0.05) increases in blood plasma ALP and LDH. The overall results of this study show that levels of 120 and 200 mg Zn/kg in the diet could be effective in decreasing the H/L ratio and cholesterol and increasing the ALP and LDH without any harmful effect on performance traits. |
| For citation : | Sobhan SAJADIFAR (2013): EFFECT OF HIGH LEVELS OF ZINC ON PLASMA METALLOENZYMES ACTIVITY AND BLOOD PARAMETERS IN BROILER CHICKS. Agriculture & Forestry, Vol. 59. Issue 1: 99-106, 2013, Podgorica |
| Keywords : | alkaline phosphatases, Lactate dehydrogenase, Performance, plasma minerals, zinc |
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