| 复合缓冲剂对奶山羊乳成分、血浆生化指标及激素含量的影响 |
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| 引用本文： | 黎佳颖,庄苏,范程瑞,王雨雨,王保哲,刘强.复合缓冲剂对奶山羊乳成分、血浆生化指标及激素含量的影响[J].动物营养学报,2017,29(7). |
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| 作者姓名： | 黎佳颖 庄苏 范程瑞 王雨雨 王保哲 刘强 |
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| 作者单位： | 南京农业大学动物科技学院,南京,210095 |
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| 基金项目： | 国家重点基础研究发展计划奶业(973)项目 |
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| 摘 要： | 本试验旨在研究长期饲喂高精料饲粮下添加复合缓冲剂(碳酸氢钠20 g/d、氧化镁12 g/d、丁酸钠20 g/d)对奶山羊乳成分、血浆生化指标及激素含量的影响。选择8头安装门静脉及肝静脉瘘管处于泌乳中期的奶山羊随机分为2组,分别饲喂基础饲粮(高精料饲粮组,HG组)和基础饲粮+复合缓冲剂(高精料饲粮+复合缓冲剂组,BG组)。预试期为7 d,正试期为143 d。结果显示:与HG组相比,复合缓冲剂显著升高采食后010 h瘤胃液p H平均值(P0.05);复合缓冲剂显著降低肝静脉血浆中非酯化脂肪酸的含量(P0.05),对门静脉和肝静脉血浆中葡萄糖、β-羟丁酸含量无显著影响(P0.05),对肝脏组织中甘油三酯和总蛋白含量无显著影响(P0.05);复合缓冲剂显著降低门静脉血浆中胰岛素和胰高血糖素的含量(P0.05),对门静脉和肝静脉血浆中胰岛素样生长因子1和生长激素的含量无显著影响(P0.05);复合缓冲剂显著或极显著升高产奶量、乳脂率、乳蛋白率、乳非脂固形物率(P0.05或P0.01)。综合得出,在长期高精料饲粮饲喂条件下,由碳酸氢钠、氧化镁、丁酸钠组成的复合缓冲剂能通过影响奶山羊血浆生化指标及激素含量,影响体机营养物质代谢,最终有效提高产乳量与改善乳品质。
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| 关 键 词： | 复合缓冲剂 高精料 奶山羊 乳品质 胰岛素 |
Effects of Compound Buffers on Milk Composition,Biochemical Parameters and Hormone Contents in Plasma of Lactating Goats |
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| LI Jiaying,ZHUANG Su,FAN Chengrui,WANG Yuyu,WANG Baozhe,LIU Qiang.Effects of Compound Buffers on Milk Composition,Biochemical Parameters and Hormone Contents in Plasma of Lactating Goats[J].Acta Zoonutrimenta Sinica,2017,29(7). |
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| Authors: | LI Jiaying ZHUANG Su FAN Chengrui WANG Yuyu WANG Baozhe LIU Qiang |
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| Abstract: | The aim of this study was to investigate the effects of compound buffers (consisted of sodium bicarbonate, magnesium oxide and sodium butyrate) on milk composition, biochemical parameters and hormone contents in plasma of lactating goats fed high concentrate diet for long term.Eight mid-lactating goats with portal and hepatic vein catheters were randomly divided into two groups to feed a basal diet (high concentrate diet group, HG group) or the basal diet added with compound buffers (high concentrate diet + compound buffers group, BG group).The pretest lasted for 7 d, and the test lasted for 143 d.The results showed as follows: compared with HG group, compound buffers significantly increased the mean of rumen fluid pH at 0 to 10 h after feeding (P<0.05);compound buffers significantly increased plasma non-estesterified fatty acid content in hepatic vein (P<0.05), but had no significant effects on plasma contents of glucose and β-hydroxybutyrate in portal and hepatic veins (P>0.05), and had no significant effects on triglyceride and total protein contents in liver tissue (P>0.05);compound buffers significantly decreased plasma insulin and glucagon contents in portal vein (P<0.05), but had no significant effects on plasma insulin-like growth factor 1 and growth hormone contents in portal and hepatic veins (P>0.05);compound buffers significantly increased milk yield, milk fat percentage, milk protein percentage and milk solid not-fat percentage (P<0.05 or P<0.01).The results suggest that adding compound buffers consisted of sodium bicarbonate, magnesium oxide and sodium butyrate affects the metabolism of nutrients through changing plasma biochemical parameters and hormone contents, and increases milk yield and improves milk quality of dairy goats fed high concentrate diet for long term. |
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| Keywords: | compound buffers high concentrate dairy goat milk quality insulin |
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