New insights into the role of dietary marine-derived polysaccharides on productive performance, egg quality, antioxidant capacity, and jejunal morphology in late-phase laying hens.
New insights into the role of dietary marine-derived polysaccharides on productive performance, egg quality, antioxidant capacity, and jejunal morphology in late-phase laying hens.
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DOI：
10.1016/j.psj.2019.12.032
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发表时间：
2020-04
期刊：
影响因子：
4.4
通讯作者：
Liu WC
中科院分区：
文献类型：
--
作者：
Guo Y;Zhao ZH;Pan ZY;An LL;Balasubramanian B;Liu WC
本研究旨在评估日粮中海藻浒苔多糖 (MDP) 对后期蛋鸡生产性能、蛋品质、抗氧化能力和空肠形态的影响。总共 240 只罗曼白蛋鸡（62 周龄）被分配进行 4 种日粮治疗，其中包括浓度为 0、1,000、2,500 和 5,000 毫克/公斤的 MDP，为期 6 周。每个处理有 6 个重复，5 个笼子（2 只鸟/笼）。结果表明，在 5 至 6 周和 1 至 6 周期间，日粮 MDP 可成倍提高产蛋量 (P < 0.05)。在 3 至 4 周和 1 至 6 周期间，随着膳食 MDP 水平的增加，破蛋率呈线性下降 (P < 0.05)。经过 4 周的喂养试验，蛋壳厚度、蛋黄颜色和哈夫单位随着日粮 MDP 水平的增加而呈现线性增加 (P < 0.05)。此外，实验结束时膳食MDP对蛋壳断裂强度、蛋壳厚度、蛋黄颜色和哈夫单位的改善呈线性（P < 0.05）。此外，膳食 MDP 在第三周结束时显示血清丙二醛 (MDA) 含量呈线性和二次方降低 (P < 0.05)。实验结束时，膳食MDP使血清中总超氧化物歧化酶活性呈二次方增加（P < 0.05），并且膳食MDP呈二次方提高肝脏过氧化氢酶（CAT）活性（P < 0.05）并线性增强空肠CAT活性（P < 0.05），而线性降低空肠MDA浓度（P < 0.05）。此外，补充 MDP 线性改善了空肠绒毛高度（P < 0.05），并以二次方增加了绒毛高度/隐窝深度比率（P < 0.05）。然而，膳食 MDP 对空肠胰蛋白酶、淀粉酶和蛋白酶活性没有影响 (P > 0.10)。总而言之，这些发现为 MDP 在提高后期产蛋鸡的生产性能、鸡蛋质量、抗氧化能力和空肠形态方面的作用提供了新的见解。
The present study was conducted to evaluate the effects of dietary marine-derived polysaccharides (MDP) from seaweed Enteromorpha on productive performance, egg quality, antioxidant capacity, and jejunal morphology in late-phase laying hens. A total of 240 Lohmann white laying hens (62 wk of age) were assigned to 4 dietary treatments that included MDP at concentrations of 0, 1,000, 2,500, and 5,000 mg/kg for 6 wk. Each treatment had 6 replicates with 5 cages (2 birds/cage). The results showed that dietary MDP quadratically improved egg production (P < 0.05) during 5 to 6 wk and 1 to 6 wk. There was a linear reduction in cracked egg rate (P < 0.05) with dietary MDP levels increased during 3 to 4 wk and 1 to 6 wk. After 4 wk of feeding trial, the egg shell thickness, yolk color, and Haugh unit showed a linear increase (P < 0.05) in response to increasing dietary MDP levels. Besides, the egg shell breaking strength, egg shell thickness, yolk color, and Haugh unit were improved linearly (P < 0.05) by dietary MDP at the end of the experiment. Moreover, dietary MDP showed a linear and quadratic reduction in serum malondialdehyde (MDA) content (P < 0.05) at the end of third week. At the end of experiment, the activity of total superoxide dismutase in serum was increased quadratically (P < 0.05) by dietary MDP, and dietary MDP quadratically improved the liver catalase (CAT) activity (P < 0.05) and linearly enhanced jejunal CAT activity (P < 0.05), whereas linearly decreased jejunal MDA concentration (P < 0.05). Furthermore, supplemental MDP linearly improved the villus height (P < 0.05) and quadratically increased villus height/crypt depth ratio (P < 0.05) of jejunum. However, dietary MDP had no effect on jejunal trypsin, amylase, and protease activity (P > 0.10). Taken together, these findings provided new insights into the role of MDP in improving the productive performance, egg quality, antioxidant capacity, and jejunal morphology of late-phase laying hens.
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影响因子：
4.4
作者：
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通讯作者：
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通讯作者：
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作者：
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通讯作者：
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