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首页> 外文期刊>Journal of Poultry Science >Effects of Graded Dietary L-arginine Supply on Organ Growth in Four Genetically Diverse Layer Lines during Rearing Period
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Effects of Graded Dietary L-arginine Supply on Organ Growth in Four Genetically Diverse Layer Lines during Rearing Period

机译：分级饲粮中L-精氨酸的供应对四个遗传多样层系饲养期间器官生长的影响

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Little information has been available about the influence of genetic background and dietary L-arginine (Arg) supply on organ growth of chickens. Therefore, the present study examined the effects of a graded ad libitum Arg supply providing 70, 100 and 200% of recommended Arg concentration on organ growth of female chickens from hatch to 18 weeks of age. The chickens derived from four layer lines of different phylogeny (white vs. brown) and laying performance (high vs. low). Based on residual feed and absolute body and organ weights recorded in six-week-intervals, feed consumption, changes of relative organ weights and allometric organ growth were compared between experimental groups. Surplus Arg caused higher feed intake than insufficient Arg ( p <0.01) that induced growth depression in turn ( p <0.05). During the entire trial chicken’s heart, gizzard and liver decreased relatively to their body growth ( p <0.001) and showed strong positive correlations among each other. On the contrary, proportions of pancreas and lymphoid organs increased until week 12 ( p <0.001) and correlated positively among each other. Due to their opposite growth behaviour ( p <0.001), internal organs were assigned to two separate groups. Furthermore, insufficient Arg induced larger proportions of bursa, gizzard and liver compared with a higher Arg supply ( p <0.05). In contrast to less Arg containing diets, surplus Arg decreased relative spleen weights ( p <0.01). The overall allometric evaluation of data indicated a precocious development of heart, liver, gizzard, pancreas and bursa independent of chicken’s genetic and nutritional background. However, insufficient Arg retarded the maturation of spleen and thymus compared with an adequate Arg supply. In conclusion, the present results emphasised the essential function of Arg in layer performance, and indicated different sensitivities of internal organs rather to chicken’s dietary Arg supply than to their genetic background.
机译：关于遗传背景和日粮L-精氨酸（Arg）供应对鸡器官生长的影响的信息很少。因此，本研究研究了按比例提供任意Arg浓度（推荐浓度分别为70％，100％和200％）对雌性鸡从孵化到18周龄的器官生长的影响。鸡来自不同系统发育（产蛋对褐色）和产蛋性能（高产与低产）的四层品系。根据六周间隔记录的剩余饲料和绝对的身体和器官重量，比较实验组之间的饲料消耗，相对器官重量变化和异体器官生长。精氨酸过剩引起的采食量高于精氨酸不足（p <0.01），反过来又引起生长下降（p <0.05）。在整个试验过程中，鸡的心脏，izz和肝脏相对于它们的身体生长都相对减少（p <0.001），并且彼此之间显示出很强的正相关性。相反，直到第12周，胰腺和淋巴器官的比例增加（p <0.001），并且彼此之间呈正相关。由于它们相反的生长行为（p <0.001），内部器官被分为两个单独的组。此外，与更高的精氨酸供应相比，精氨酸不足会诱发较大的法氏囊，胃izz和肝脏（p <0.05）。与较少的含Arg饮食相比，过量的Arg减少了相对脾脏重量（p <0.01）。数据的整体异体评估表明，心脏，肝脏，g，胰腺和法氏囊的早熟发育与鸡的遗传和营养背景无关。然而，与充足的精氨酸供应相比，精氨酸不足会延迟脾脏和胸腺的成熟。总之，目前的结果强调了精氨酸在蛋鸡生产性能中的基本功能，并指出了内部器官对鸡的膳食精氨酸供应而不是其遗传背景的不同敏感性。

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