This trial was carried out to compare the effect of the dietary supplementation of high dosesof either synthetic pigment ethyl ester of β-apo-8′-carotenoic acid (apo-ester) or natural pigments,mainly lutein and zeaxanthin, extracted from Tagetes erecta, on egg quality of hens laying brownshell eggs (ISA Brown) and white shell eggs (Hy-Line White W-36). The hens of each strain weredivided into 6 groups and fed a corn-soybean basal diet supplemented either with 40, 60, and 80ppm of apo-ester (APO) or with 120, 180, and 240 ppm of marigold extract (MAR). Egg pigmentationrose linearly and significantly (P < 0.01) as the dietary levels of apo-ester increased, but this didnot occur when MAR supplementation was used. The amount of β-carotene equivalents in wholeliquid egg of MAR treatments was almost constant with varying pigment dietary dose and wassignificantly lower (P < 0.01) than in APO treatments. In both hen strains, whole liquid egg redness(a*) and yellowness (b*) were higher with APO supplementation. The egg component weights werehighly affected (P < 0.01) by the hen strain, with yolk:egg ratio higher in the Hy-Line. The trialconfirms that in spite of the higher level of MAR supplementation, APO has a better efficiency inwhole liquid egg pigmentation. The ISA Brown hens showed a better ability to absorb dietarycarotenoids than did the Hy-Line White.
|Anno di pubblicazione:||2007|
|Titolo:||Comparative pigmentation efficiency of high dietary levels of apo-ester and tagetes on the quality traits of whole liquid egg of two strain of laying hens|
|Autori:||F. SIRRI; N. IAFFALDANO; G. MINELLI; M.P. ROSATO; A. FRANCHINI|
|Appare nelle tipologie:||Articolo su rivista|
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