Abstract The objective of this study was to determine amino acid (AA) and calcium (Ca) digestibility of hatchery byproducts in nursery pigs. In experiment 1, the coefficients of standardized ileal digestibility (CSID) of AA in hatchery byproducts were measured using 10 barrows surgically fitted with T-cannulas at the distal ileum (initial body weight = 11.3 ± 1.3 kg). Four diets were prepared to contain 30% of infertile eggs, unhatched eggs, culled chicks, and a mixture (20% dried infertile eggs + 20% dried unhatched eggs + 60% dried culled chicks) as the sole source of nitrogen and a nitrogen-free diet was additionally prepared to measure basal endogenous losses of AA. In experiment 2, ten nursery barrows (initial body weight = 10.2 ± 0.7 kg) were used to measure the coefficient of standardized total tract digestibility (CSTTD) of Ca in hatchery byproducts. Four experimental diets contained 10, 10, 25, and 15% of infertile eggs, unhatched eggs, culled chicks, and the mixture (20% dried infertile eggs + 20% dried unhatched eggs + 60% dried culled chicks) as the sole source of Ca, respectively and a Ca-free diet was additionally prepared to measure basal endogenous losses of Ca. The index method and the marker-to-marker method were employed in experiment 1 and in experiment 2, respectively. A replicated 5 × 4 Latin square design was an experimental design in both experiments. Infertile eggs had greater (P

中文翻译：

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饲喂给保育猪的孵化场副产品中氨基酸和钙的消化率

摘要 本研究的目的是确定保育猪孵化场副产品的氨基酸 (AA) 和钙 (Ca) 消化率。在实验 1 中，孵化场副产品中 AA 的标准化回肠消化率 (CSID) 系数是使用 10 头在回肠远端通过手术安装 T 型套管的手推车测量的（初始体重 = 11.3 ± 1.3 kg）。准备了四种日粮，含有 30% 的不育鸡蛋、未孵化的鸡蛋、剔除的小鸡和一种混合物（20% 干燥的未孵化鸡蛋 + 20% 干燥的未孵化鸡蛋 + 60% 干燥的剔除小鸡）作为唯一的氮源和氮 -另外准备免费饮食以测量 AA 的基础内源性损失。在实验 2 中，十只育苗手推车（初始体重 = 10.2 ± 0。7 kg) 用于测量孵化场副产品中钙的标准化全消化道消化率 (CSTTD) 系数。四种实验日粮含有 10%、10%、25% 和 15% 的不育鸡蛋、未孵化的鸡蛋、剔除的小鸡和混合物（20% 干燥的未孵化鸡蛋 + 20% 干燥的未孵化鸡蛋 + 60% 干燥的剔除小鸡）作为唯一来源分别制备 Ca 和不含 Ca 的饮食，以测量 Ca 的基础内源性损失。实验1和实验2分别采用指数法和标记对标记法。重复的 5 × 4 拉丁方设计是两个实验中的实验设计。不孕的鸡蛋有更大的（P 和混合物（20% 干燥的不育鸡蛋 + 20% 干燥的未孵化鸡蛋 + 60% 干燥的剔除小鸡）分别作为 Ca 的唯一来源，另外还准备了不含 Ca 的饮食以测量 Ca 的基础内源性损失。实验1和实验2分别采用指数法和标记对标记法。重复的 5 × 4 拉丁方设计是两个实验中的实验设计。不孕的鸡蛋有更大的（P 和混合物（20% 干燥的不育鸡蛋 + 20% 干燥的未孵化鸡蛋 + 60% 干燥的剔除小鸡）分别作为 Ca 的唯一来源，另外还准备了不含 Ca 的饮食以测量 Ca 的基础内源性损失。实验1和实验2分别采用指数法和标记对标记法。重复的 5 × 4 拉丁方设计是两个实验中的实验设计。不孕的鸡蛋有更大的（P