Effects of substituting yellow corn for sorghum in geese diets on magret and foie gras quality

Abstract

The aim of this trial was to study the effects of substitution of yellow corn with sorghum during the growing-finishing (G period), overfeeding (O period), or both periods on magret and foie gras quality in geese. In total, 260 ganders were divided into 4 groups (65 birds in each) differing in the cereal (yellow corn or sorghum) included in the diet given during the G and the O periods, using a 2 × 2 factorial arrangement of treatments. The groups differed in the nature of the cereal in the diet offered to birds between 44 and 104 d of age (G period: a diet containing 500 g of sorghum/kg (SS and SC groups) or a diet containing 500 g of yellow corn/kg (CS and CC groups). The groups differed also in the diet offered to birds between 105 and 120 d of age (O period): 967 g of yellow corn/kg (SC and CC groups) or 965 g of sorghum/kg (SS and CS groups). At the end of the O period, the birds were slaughtered after 10 h of fasting to measure foie gras and breast muscle weight, color, and chemical composition. The mortality in the SC group was higher (P < 0.05) than in the other 3 groups (14.29 vs. 3.58%, average of the 3 groups). After overfeeding, birds fed with sorghum had foie gras that were heavier 984 vs. 885 g, in CS+SS vs. CC+SC groups, respectively; P < 0.001) and less yellow (18.03 vs. 23.97 for b*, in CS+SS vs. CC+SC groups, respectively, P < 0.001) than birds fed with corn. The substitution of yellow corn with sorghum during the G and O periods (SS group) increased the weight of the foie gras, but altered its color to a paler yellow. In contrast, a substitution during the G period only (SC group) resulted in increased mortality during the O period.

Worldwide Mycotoxins Exposure in Pig and Poultry Feed Formulations

“…These compounds also provide proteins, mineral, and vitamins but the main reason for their use is energy. The raw materials used as energy sources are the main component of the diets, up to 99% in ducks and geese during force-feeding [26,27]. Cereal grains are the main contributors, but the types of cereal grains used depend largely on their costs and their local availability for animal diet.…”

Effects of dietary protein level during rearing period and age at overfeeding on magret and foie gras quality in male mule ducks

“…After weighing, the livers were prepared for processing as described by Arroyo et al . (). The main blood vessels were carefully removed, and a slice of 180 ± 5 g was excised perpendicularly to the long axis of the liver and across the large and small lobes, and placed in a glass container.…”

Conception et évaluation d’un système innovant de production de foie gras : le cas de la substitution du maïs par du sorgho chez l’oie

“…Nous avons étudié les conséquences d'une substitution partielle ou totale (croissance-finition et/ou gavage) du maïs par du sorgho sur les performances des oies et la qualité du foie gras (Arroyo et al 2013d). La céréale utilisée n'a pas modifié le poids vif des oies à leur entrée en gavage (P > 0,05) ni la quantité de nourriture distribuée pendant le gavage (P > 0,05, tableau 4).…”

“…Les teneurs en matière sèche et en lipides des foies issus d'animaux gavés avec du sorgho sont plus faibles (-2% et -3 % respectivement, P < 0,05) tandis que la teneur en cendres est plus élevée (+ 20%, P < 0,05). La composition en acides gras est aussi modifiée, avec notamment une teneur plus élevée en acide gras C-18 (+ 8%) et une teneur plus faible en acide gras C-18:1ω9 (-2%, P < 0,05, Arroyo et al 2013d). Ces modifications biochimiques sont toutefois de faible ampleur.…”