Fan Geng-Jen, Shih Bor-Ling, Lin Hui-Chiu, Lee Tzu Tai, Lee Churng-Faung, Lin Yih-Fwu
Nutrition Division, Livestock Research Institute, Council of Agriculture (COA), Hsinhua, Tainan, 712009, Taiwan.
Department of Animal Science, National Chung Hsing University, Taichung 402204, Taiwan.
Anim Biosci. 2021 Mar;34(3):449-456. doi: 10.5713/ajas.20.0256. Epub 2020 Aug 21.
Seaweeds could be an alternative and functional feed resource. The purpose of this experiment is to investigate the effect of dietary supplementation of Sargassum meal on laying performance and egg quality of layers.
Two hundred 36-wk-old layers were divided into five treatment groups. Each treatment had four replicates with 10 hens per experimental unit. The corn-soybean meal basal diet was formulated as control group. Sargassum meals were included 0%, 1%, 2%, 3%, or 5% to diets for five treatment groups, respectively. Treatment groups were isocaloric-isonitrogenous diets. Laying performance and egg quality were measured for eight weeks.
Sargassum meal supplementation did not affect daily feed intake. Supplementation 1% to 3% of Sargassum meal in diets increased daily laying rate and egg mass compared with those from control group (p<0.05). Egg qualities among five groups were all similar. Supplementation of 3% Sargassum meal increased the lightness of egg yolk (p<0.05). Eggs produced from layers fed 1% and 2% Sargassum meal had a higher consumer's acceptability than the control group (p<0.05). In blood characteristics, contents of glucose, nitrogen, triiodothyronine (T3) and thyroxine (T4) increased as the increase of supplementation ratio of Sargassum meal (p<0.05). In serum antibody titers, supplementation of 2% Sargassum meal stimulated a higher immunoglobulin M (IgM) level than that from control group (p<0.05). However, IgM content of layers fed diets with Sargassum meal ≥3% were decreased (p<0.05). There was no difference in IgA and IgG titers among groups.
Supplementation of 1% to 3% Sargassum meal has shown to increase egg laying rate and egg mass of Leghorn layers. However, high supplementation (5%) would negatively affect laying performance. In consideration of laying performance, egg quality, consumer responses, and blood antibody, supplementation of Sargassum meal was suggested 2% in the diet for layers.
海藻可能是一种替代性的功能性饲料资源。本实验旨在研究日粮中添加马尾藻粉对蛋鸡产蛋性能和蛋品质的影响。
将200只36周龄的蛋鸡分为五个处理组。每个处理组有四个重复，每个实验单元有10只母鸡。以玉米-豆粕基础日粮作为对照组。五个处理组的日粮中分别添加0%、1%、2%、3%或5%的马尾藻粉。处理组日粮为等热卡等氮日粮。对产蛋性能和蛋品质进行为期八周的测定。
添加马尾藻粉不影响日采食量。日粮中添加1%至3%的马尾藻粉可提高日产蛋率和产蛋量，与对照组相比差异显著（p<0.05）。五组之间的蛋品质均相似。添加3%的马尾藻粉可提高蛋黄亮度（p<0.05）。饲喂1%和2%马尾藻粉日粮的蛋鸡所产鸡蛋的消费者接受度高于对照组（p<0.05）。在血液指标方面，葡萄糖、氮、三碘甲状腺原氨酸（T3）和甲状腺素（T4）的含量随着马尾藻粉添加比例的增加而升高（p<0.05）。在血清抗体效价方面，添加2%的马尾藻粉可刺激免疫球蛋白M（IgM）水平高于对照组（p<0.05）。然而，饲喂添加≥3%马尾藻粉日粮的蛋鸡IgM含量降低（p<0.05）。各组之间的IgA和IgG效价无差异。
日粮中添加1%至3%的马尾藻粉可提高来航蛋鸡的产蛋率和产蛋量。然而，高添加量（5%）会对产蛋性能产生负面影响。综合考虑产蛋性能、蛋品质、消费者反应和血液抗体等因素，建议蛋鸡日粮中马尾藻粉的添加量为2%。
