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The role of organic selenium in cadmium toxicity: effects on broiler performance and health status

Published online by Cambridge University Press:  10 August 2012

A. Al-Waeli ,
E. Zoidis ,
A. C. Pappas ,
N. Demiris ,
G. Zervas  and
K. Fegeros
A. Al-Waeli
Affiliation:
Department of Nutritional Physiology and Feeding, Faculty of Animal Science and Aquaculture, Agricultural University of Athens, 75 Iera Odos Street, 11855 Athens, Greece
E. Zoidis*
Affiliation:
Department of Nutritional Physiology and Feeding, Faculty of Animal Science and Aquaculture, Agricultural University of Athens, 75 Iera Odos Street, 11855 Athens, Greece
A. C. Pappas
Affiliation:
Department of Nutritional Physiology and Feeding, Faculty of Animal Science and Aquaculture, Agricultural University of Athens, 75 Iera Odos Street, 11855 Athens, Greece
N. Demiris
Affiliation:
Department of Statistics, Athens University of Economics and Business, 76 Patission Street, 10434 Athens, Greece
G. Zervas
Affiliation:
Department of Nutritional Physiology and Feeding, Faculty of Animal Science and Aquaculture, Agricultural University of Athens, 75 Iera Odos Street, 11855 Athens, Greece
K. Fegeros
Affiliation:
Department of Nutritional Physiology and Feeding, Faculty of Animal Science and Aquaculture, Agricultural University of Athens, 75 Iera Odos Street, 11855 Athens, Greece
*
†E-mail: ezoidis@aua.gr
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Abstract

This work was part of a project designed to assess whether organic selenium (Se) can protect against the toxic effects of cadmium (Cd). A total of 300 1-day-old, as hatched, broilers were randomly distributed in four dietary treatments with five replicate pens per treatment. In T1 treatment, broilers were fed a diet with 0.3 mg/kg added Se, as Se-yeast, without added Cd; in T2, broilers were fed a diet with 0.3 mg/kg Se and 10 mg/kg Cd; in T3, broilers were fed a diet with 0.3 mg/kg Se and 100 mg/kg of Cd; and in T4 treatment broilers were fed a diet with 3 mg/kg Se and 100 mg/kg Cd. The Cd was added to diets T2, T3 and T4 as CdCl2. On the 4th and 6th week, two broilers per replicate pen were killed in order to obtain whole blood, liver, kidney and breast samples. Body mass, feed conversion ratio and mortality were assessed and haematological analyses were performed. Se and Cd levels in tissues were analysed by inductively coupled plasma mass spectrometry. Broilers supplemented with 0.3 mg/kg Se can tolerate low levels of Cd added to the diets, as there were no significant negative effects on the examined performance parameters, whereas addition of excess Cd led to an impairment of broilers’ performance. Mortality of broilers did not differ between the four dietary treatments at any interval point or the whole period. The examined haematological parameters such as haematocrit, total blood protein concentration, and leukocytes types ranged within physiological values, revealing no negative health effects after simultaneous Cd and Se addition. The present study indicated that Se can help against the negative effects of Cd, but cannot counteract all of its negative effects.

Keywords

antioxidant systembroilercadmium toxicityperformanceselenium-yeast
Type
Nutrition
Information
animal , Volume 7 , Issue 3 , March 2013 , pp. 386 - 393
Copyright
Copyright © The Animal Consortium 2012

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