This study evaluated the effects of globin and spray-dried porcine plasma (SDPP) on growth performance, digestibility, nitrogen retention, energy retention efficiency (ERE) and intestinal morphology of broiler chickens. A total of 336-day-old male broiler chickens were reared from 1 to 40 days of age and fed 3 diets (8 replicates/diet, 14 birds/replicate) during 3 feeding phases: starter (1–12 days), grower (12–25 days) and finisher (25–40 days). Isonitrogenous diets were formulated by replacing gluten protein isolate contained in the control diet (C diet) with 2% (starter) or 1% (grower and finisher) spray-dried porcine plasma in the plasma diet (SDPP diet). The globin diet (G diet) was obtained by adding globin on the top of C diet at a dose of 0.08% for the whole rearing period. Total tract apparent digestibility (aD), nitrogen retention and ERE were assessed during the three growing phases. At 12 and 40 days of age, one bird per pen was slaughtered to sample gut, liver, spleen and bursa of Fabricius for histomorphological investigations. The SDPP diet increased body weights of chickens at 12 (+60 g; p < .001), 25 (+101 g; p < .001) and 40 days (+130 g; p = .018) of age compared to C and G diets. Also SDPP improved crude protein aD (+9.7%) and ERE (+12.3%) during the starter phase (p < .001). Dietary globin and SDPP inclusion did not affect either the gut morphology or the histopathological findings in birds at 12 and 40 days of age, despite a numerical (+6.90% and +7.40% respectively) villus height improvement in the SDPP group. Overall, these results confirm that dietary supplementation with SDPP and, to a lesser extent, with globin can improve growth performance and dietary protein and energy utilization in broiler chickens without effect on gut functionality.

中文翻译：

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日粮中添加珠蛋白和喷雾干燥猪血浆对肉鸡生产性能、消化率和组织形态学特性的影响

本研究评估了珠蛋白和喷雾干燥猪血浆 (SDPP) 对肉鸡生长性能、消化率、氮保留、能量保留效率 (ERE) 和肠道形态的影响。总共饲养 336 日龄雄性肉鸡，从 1 日龄到 40 日龄，在 3 个饲喂阶段饲喂 3 种日粮（8 个重复/日粮，14 只鸡/重复）：开食期（1-12 天）、生长期（ 12–25 天）和完成者（25–40 天）。通过在血浆饮食（SDPP 饮食）中用 2%（开食者）或 1%（生长和育肥者）喷雾干燥的猪血浆代替对照饮食（C 饮食）中包含的面筋蛋白分离物来配制等氮饮食。珠蛋白日粮（G 日粮）是通过在整个饲养期间以 0.08% 的剂量在 C 日粮之上添加珠蛋白而获得的。全消化道表观消化率 (aD), 在三个生长阶段评估氮保留和 ERE。在 12 日龄和 40 日龄时，每栏屠宰一只鸟，以对法布里修斯的肠道、肝脏、脾脏和法氏囊进行组织形态学研究。SDPP 日粮增加了 12 (+60 g;p  < .001)、25 (+101 g; p  < .001) 和 40 天 (+130 g; p  = .018) 与 C 和 G 饮食相比。SDPP 还改善了起始阶段的粗蛋白 aD (+9.7%) 和 ERE (+12.3%) ( p  < .001)。尽管 SDPP 组的绒毛高度在数值上有所改善（分别为 +6.90% 和 +7.40%），但添加日粮珠蛋白和 SDPP 不会影响 12 日龄和 40 日龄鸡的肠道形态或组织病理学发现。总体而言，这些结果证实，日粮中添加 SDPP 以及在较小程度上添加珠蛋白可以改善肉鸡的生长性能以及日粮蛋白质和能量利用，而不会影响肠道功能。