Poult Sci. 2017 Jun 1;96(6):1725-1734. doi: 10.3382/ps/pew442.
This study was designed to evaluate the effect of corn or sorghum diet and canthaxanthin (CX) supplementation on performance in broiler breeders. A total of 440 females with similar body weight (BW) (3.71 ± 0.14 kg) and 60 roosters were placed in an open-sided house with 20 pens, randomly distributed in a factorial arrangement (2 × 2). There were 4 diets of 2 ingredients; corn (CO) or sorghum (SO) and 2 levels of CX; 6 mg/kg (CX) and 0 mg/kg (NCX) totaling 5 replicate pens of 22 females and 3 males each, from 42 to 65 wk, divided in 2 periods (from wk 42 to 53 and wk 54 to 65). Birds' BW was measured every 28 d and mortality rate was calculated at the end of trial. Egg production (%), egg specific gravity (g/cm3), egg weight (g), yolk weight (%), albumen weight (%), eggshell weight (%) and yolk colorimetric score were measured weekly. Incubation parameters were recorded in 12 incubations to evaluate hatching eggs, hatching (%), hatchability (%), fertility (%), weight of the chicks born and their quality. The BW, mortality, percentage of yolk and albumen weight, fertility and some incubation parameters were not affected (P > 0.05) by diets used. An increase in the egg production, hatching eggs, chicks born and first quality chick by hen at the second period were observed in CX breeder's diets (P = 0.0066; P = 0.0060; P = 0.0368; P = 0.0326). Egg specific gravity and eggshell weight were improved at the first period by SO+CX diet (P = 0.0138; P = 0.0209) and the same effect to egg weight, but at the second period (P = 0.0251). The CX was well absorbed from the diet and effectively transferred to the egg yolk, thereby increasing egg yolk pigmentation in the both periods (P < 0.0001). The CX supplementation in broiler breeder diets improved the productive and reproductive performance (laying% and hatchable eggs) at the second period, also to the both periods improved the egg yolk pigmentation.
本研究旨在评估玉米或高粱日粮和角黄素（CX）补充对种鸡性能的影响。总共 440 只体重（BW）相近（3.71±0.14kg）的母鸡和 60 只公鸡被放置在一个开放式房屋中，有 20 个围栏，随机分布在一个析因设计（2×2）中。日粮有 2 种成分：玉米（CO）或高粱（SO）和 2 个 CX 水平；6mg/kg（CX）和 0mg/kg（NCX），共 5 个重复围栏，每个围栏有 22 只母鸡和 3 只公鸡，从 42 到 65 周，分为 2 个时期（从第 42 周到第 53 周和第 54 周到第 65 周）。每隔 28 天测量一次鸡只 BW，并在试验结束时计算死亡率。每周测量产蛋率（%）、蛋比重（g/cm3）、蛋重（g）、蛋黄重（%）、蛋清重（%）、蛋壳重（%）和蛋黄颜色评分。在 12 次孵化中记录孵化参数，以评估种蛋、孵化率（%）、孵化率（%）、受精率（%）、初生雏鸡体重及其质量。BW、死亡率、蛋黄和蛋清重量百分比、受精率和一些孵化参数不受日粮（P>0.05）的影响。在 CX 种鸡日粮中，观察到第二期母鸡的产蛋量、种蛋、初生雏鸡和初生优质雏鸡增加（P=0.0066；P=0.0060；P=0.0368；P=0.0326）。SO+CX 日粮在第一期提高了蛋比重和蛋壳重（P=0.0138；P=0.0209），且对蛋重也有同样的效果，但在第二期（P=0.0251）。CX 从日粮中被很好地吸收，并有效地转移到蛋黄中，从而在两个时期都增加了蛋黄的色素沉着（P<0.0001）。CX 补充剂在种鸡日粮中提高了第二期的生产和繁殖性能（产蛋率和可孵化蛋数），同时也提高了两个时期的蛋黄色素沉着。
