ORIGINAL PAPER
Effect of increasing doses of marigold (Tagetes erecta) flower extract on eggs carotenoids content, colour and oxidative stability
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1
Institute of Animal Science, Department of Nutrition Physiology and Animal Product Quality, Přátelství 815, CZ-104 00, Prague, Czech Republic
2
Czech University of Life Sciences Prague, Faculty of Agrobiology, Food and Natural Resources, Department of Microbiology, Nutrition and Dietetics, Kamýcká 129, CZ-165 21, Prague, Czech Republic
Publication date: 2016-03-09
Corresponding author
M. Skřivan
Institute of Animal Science, Department of Nutrition Physiology and Animal Product Quality, Přátelství 815, CZ-104 00, Prague, Czech Republic
J. Anim. Feed Sci. 2016;25(1):58-64
KEYWORDS
ABSTRACT
Two hundred and forty hens were assigned to six dietary treatments
and fed a maize-wheat-soyabean diet supplemented per kg with 0, 150, 350,
550, 750 and 950 mg of marigold flower extract (MFE) containing lutein and
zeaxanthin in the amount of 21.26 and 9.65 mg · kg–1, respectively. There was
observed no MFE addition effect on hens body weight and feed conversion ratio.
The higher hen-day egg production was stated for group fed diet supplemented
with 550 and 950 mg of MFE per kg of diet, whereas egg weight was increased
in groups fed 550 and 750 mg MFE per kg of diet. The treatment effects on
the albumen parameters, and yolk and shell percentages were not statistically
significant. Dietary MFE addition increased the yolk colour score (DSM Yolk Colour
Fan), and redness and yellowness of the yolks but decreased their lightness.
Supplementation of MFE increased the lutein and zeaxanthin concentration in the
egg yolks in a dose-dependent manner, from 12.34 and 5.92 mg · kg–1 dry matter
(control) to 36.33 and 25.59 mg · kg–1 dry matter (group fed diet with 950 mg MFE
per kg), respectively. No treatment effect on the concentrations of retinol and
α-tocopherol in the yolk was observed. Dietary MFE significantly increased the
oxidative stability of eggs lipids stored at 18 °C for 28 days. It can be concluded
that 1. hen diet supplementation with MFE provides the yolk pigmentation
required by consumers, and 2. MFE (in the amount of 550 mg · kg–1 diet) is
a suitable alternative to commercial synthetic xanthophylls.
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