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Effects of dietary natural antioxidant supplementation on broiler chicken and Muscovy duck meat quality

Margherita Marzoni
Dipartimento di Scienze Veterinarie, Universita degli Studi di Pisa, V.le delle Piagge 2, 56124 Pisa, Italy
Abstract :
A total of 150 one-day-old male broiler chicks (Ross 308) and 120 one-day-old female Muscovy
ducklings were distributed over 15 and 12 pens, respectively. All birds received the same diet during
the first period of life. Throughout the second period (36-56 days for broiler chickens and 43-69 days
for Muscovy ducks) different source plant extracts were supplemented to the basal diet for each
species; dietary treatments were assigned to three pens each. In the chicken (CK) trial the following
dry extracts were tested: tomato (
Solanum lycopersicum)
skin (200 mg lycopene kg
feed; CK-L200
group), orange (
Citrus aurantium
) peel (200 mg hesperidin kg
feed; CK-O200 group), and green
tea (
Camellia sinensis
) leaves (200 mg catechins kg
feed; CK-T200 group). For the Muscovy duck
(DK) trial the tested extracts were produced from rosemary (
Rosmarinus officinalis)
leaves (200 mg
carnosic acid kg
feed; DK-R200 group) and orange (
Citrus aurantium
) peel (200 mg hesperidin kg
feed; DK-O200 group). The effects in both species were compared with those for the unsupplemented
diet (CK-C and DK-C) and the diet supplemented with 200 mg of alpha-tocopheryl acetate (CK-E200
and DK-E200). At the end of each trial three birds per pen were slaughtered. Growth performance,
pH and meat proximate composition in both species were not affected by dietary treatments. The
TBARS value of chicken leg meat from the unsupplemented group was 3.86, while on average in
CK-E200, CK-L200 and CK-O200 it was by 60, 55 and 63% lower (P<0.05), whereas in CK-T200
it was by 25% higher (P<0.05). Dietary treatments did not exert any antioxidant effects on chicken
breast meat. The TBARS value of duck breast meat and leg meat from the control was 1.39 and 4.51,
respectively, while on average in the DK-E200, DK-O200 and DK-R200 groups it was by 82 and
71%, 33 and 46%, and 66 and 47% lower (P<0.05), respectively.
he magnitude of the antioxidant
action of vegetable dry extract in this trial was lower than that of alpha-tocopheryl acetate.
Keywords :
broiler chicken / meat quality / muscovy duck / plant antioxidants / TBARS value / vitamin E

Date Deposited : 02 Apr 2015 13:51

Last Modified : 02 Apr 2015 13:51

Official URL:

Volume 32, Number 4, - 2014

Full Text Original
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