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首页> 外文期刊>Poultry Science >Effects of hen production cycle and egg weight on egg quality and composition, hatchability, duckling quality, and first-week body weight in Pekin ducks
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Effects of hen production cycle and egg weight on egg quality and composition, hatchability, duckling quality, and first-week body weight in Pekin ducks

机译：母鸡生产周期和蛋重对北京烤鸭蛋质量和组成，孵化率，雏鸭质量和第一周体重的影响

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This study was conducted to determine the effect of hen production cycle (HPC) and the effect of egg weight (EW) at the same egg production level on egg quality, egg composition, hatchability, duckling quality, and first-week BW in Pekin ducks. For HPC, hatching eggs were obtained from different Pekin-duck breeder flocks, aged 31 wk for the first production cycle (HPC1) and 78 wk for the second production cycle (HPC2). For EW, there were 3 categories: heavy (H), medium (M), and light (L). Ten eggs from each HPC and EW group were analyzed for the determination of egg quality, and albumen and yolk compositions. Ninety eggs from each HPC and EW group were incubated for the determination of hatchability, and duckling weight and quality. After quality scoring, 20 ducklings (10 male and 10 female) from each group were weighed, and reared to 1 wk of age in a brooder machine to determine relative growth (RG). The results showed that the albumen index; Haugh unit; shell percentage; yolk moisture, ash, protein, lipids, and triglycerides; albumen moisture, ash, and protein; yolk fatty acid contents; hatching weight; duckling weights at 1 wk of age; and RG were significantly affected by HPC. Egg weight affected shell thickness, yolk and albumen indices, Haugh unit, yolk and albumen percentages, yolk to albumen ratio, shell percentage, yolk fatty acid content, hatching weight, duckling weight at 1 wk of age, and RG.
机译：这项研究旨在确定母鸡生产周期（HPC）的影响以及相同蛋生产水平下蛋重（EW）对北京烤鸭蛋质量，蛋组成，孵化率，雏鸭质量和第一周体重的影响。对于HPC，从不同的北京烤鸭种鸡群获得孵化卵，第一生产周期（HPC1）的年龄为31周，第二生产周期（HPC2）的年龄为78周。对于电子战，分为3类：重（H），中（M）和轻（L）。分析每个HPC和EW组的10个鸡蛋，以确定鸡蛋的质量，蛋白和蛋黄成分。将每个HPC和EW组的90个卵孵化，以确定孵化率，雏鸭的重量和质量。进行质量评分后，将每组的20只小鸭（10只雄性和10只雌性）称重，并在育雏机中饲养至1周龄，以确定相对生长（RG）。结果表明，蛋白指数;霍夫单位;壳百分比;蛋黄水分，灰分，蛋白质，脂质和甘油三酸酯;蛋白水分，灰分和蛋白质;蛋黄脂肪酸含量;孵化重量; 1周龄时的小鸭重量; HP和RG受HPC影响明显。蛋重影响蛋壳厚度，蛋黄和蛋清指数，Haugh单位，蛋黄和蛋清百分比，蛋黄与蛋清比例，蛋壳百分比，蛋黄脂肪酸含量，孵化重量，1周龄小鸭重量和RG。

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