Standardized ileal amino acid digestibility in egg from hyperimmunized hens fed to weaned pigs
Standardized ileal amino acid digestibility in egg from hyperimmunized hens fed to weaned pigs
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DOI：
10.2527/jas.53983
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发表时间：
2012-12-01
影响因子：
3.3
通讯作者：
Nyachoti, C. M.
中科院分区：
文献类型：
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作者：
Heo, J. M.;Kiarie, E.;Nyachoti, C. M.
本研究测定了断奶仔猪用大肠杆菌K88抗原（EGG）超免疫母鸡后产鸡蛋中AA的回肠表观消化率（AID）和标准化消化率（SID）。包括喷雾干燥的猪血浆（SDPP）进行比较。8头公猪（Yorkshire-Landrace x Duroc;初始BW为17 +/- 1 kg）在回肠末端安装T型插管，并以完全随机设计饲喂2种饲料，每种饲料重复4次。日粮是以玉米（Zea mays）淀粉为基础，以EGG或SDPP作为唯一蛋白质来源，并配制成含有130 g/kg CP。在研究结束时，向所有猪（n = 8）饲喂50 g/kg酪蛋白饮食以定量内源性N和AA损失，从而确定SID。二氧化钛（3 g/kg）作为不可消化的标记物包含在饲料中。每个周期持续7 d。使猪适应它们各自的饮食5天，然后在第6天和第7天连续回肠回肠收集12小时。在每个阶段开始时将每日饲料供给量设定为4%BW，并在0800和1600 h以干醪形式分2等份提供。猪通过低压乳头饮水器无限制地获得水。EGG组CP和必需AA的AID（%）显著低于SDPP组（P < 0.05）。与SDPP相比，EGG组CP和必需AA的SID（%）（82 vs.96）显著降低（P < 0.05）。总之，在高水平饲养时，鸡蛋中N和必需AA的平均AID和SID低于SDPP。
The study was conducted to determine the apparent ileal digestibility (AID) and standardized ileal digestibility (SID) of AA in egg from hens hyperimmunized with Escherichia coli K88 antigens (EGG) fed to weaned pigs. Spray dried porcine plasma (SDPP) was included for comparison. Eight barrows (Yorkshire-Landrace x Duroc; initial BW of 17 +/- 1 kg) were fitted with a T-cannula at the distal ileum and fed 2 diets in a completely randomized design to give 4 replicates per diet. The diets were corn (Zea mays) starch based with either EGG or SDPP as the sole source of protein and were formulated to contain 130 g/kg CP. At the end of the study, a 50 g/kg casein diet was fed to all pigs (n = 8) to quantify endogenous N and AA losses to determine SID. Titanium dioxide (3 g/kg) was included in the diets as an indigestible maker. Each period lasted for 7 d. Pigs were adapted to their respective diets for 5 d followed by 12 h of continuous ileal digesta collection on days 6 and 7. Daily feed allowance was set at 4% BW at the beginning of each period and offered in 2 equal portions at 0800 and 1600 h as a dry mash. Pigs had unlimited access to water via low pressure nipple drinkers. The AID (%) of CP and indispensable AA were lower (P < 0.05) in EGG compared with SDPP. The SID (%) of CP (82 vs. 96) and indispensable AA were lower (P < 0.05) in pigs fed EGG compared with SDPP. In conclusion, the average AID and SID of N and indispensable AA in EGG are lower than in SDPP when fed at high levels.