大豆黄酮及其复合制剂对绒山羊消化代谢和产绒性能的影响
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摘要
大豆黄酮(Daidzein,Da)是异黄酮类植物雌激素的一种,具有雌激素样活性,能与下丘脑、垂体等雌二醇(Estradiol,E_2)受体不同程度地结合,从而影响动物的神经内分泌系统,是动物体内的生物活性物质;半胱胺(Cysteamine,CS)是半胱氨酸的脱羧产物,因具有活性巯基和氨基而具有多种生物功能,也是动物体内的生物活性物质。以往研究表明大豆黄酮及半胱胺能提高动物的生长性能、繁殖能力和免疫力。有关二者对绒山羊消化代谢及产绒性能的影响尚未见报道。为此,本试验通过在饲料中添加大豆黄酮、半胱胺来观测其对绒山羊的消化代谢及产绒性能的影响。为其作为饲料添加剂在畜牧生产中的实际应用提供理论依据,同时也为提高山羊绒产量探索一条新的途径。
     试验选用6月龄雄性绒山羊4只,采用4×4拉丁方设计。试验动物随机分为4组:CS组、Da组、协同组、对照组。试验共分4轮,每轮试验期3周,过渡期1周。对照组饲喂基础日粮,Da组在基础日粮中添加Da 3mg/kg,CS组在基础日粮中添加CS 100mg/kg.W.B,协同组在基础日粮中添加Da 3mg/kg+CS 100mg/kg.W.B。试验测定了各组试验动物的生产指标、绒毛物理指标、血液指标及消化代谢指标。探讨了大豆黄酮、半胱胺对绒山羊绒毛物理性状及消化代谢的影响。试验结果(只涉及对照组、大豆黄酮组、协同组:半胱胺组她人合作)表明:
     1.大豆黄酮及与半胱胺协同应用可显著促进绒山羊增重。其中,以大豆黄酮组对绒山羊的作用效果最明显。与对照组相比,大豆黄酮组增重提高了16.67%(P<0.05);协同组增重提高了5.56%(P<0.05)。
     2.大豆黄酮及与半胱胺协同应用可明显促进绒山羊绒毛生长。绒毛长度显著长于对照组;绒细度显著低于对照组:毛细度显著高于对照组:绒毛强度与伸度无显著影响。协同组作用效果略优于大豆黄酮组(P>0.05)。
     大豆黄酮组绒自然长度与伸直长度较对照组分别提高25.44%、24.72%(P<0.05);毛自然长度与伸直长度较对照组分别提高23.58%、20.88%(P<0.05)。协同组绒自然长度与伸直长度较对照组分别提高29.68%、33.77%(P<0.05);毛自然长度与伸直长度较对照组分别提高24.95%、22.37%(P<0.05)。
     大豆黄酮组与协同组绒细度分别为10.76±1.84μm、10.46±1.33μm,较对照组分别降低了3.93%、6.61%(P<0.05);大豆黄酮组与协同组毛细度分别为26.50±3.36、26.87±5.37,较对照组分别提高了5.03%、6.50%(P<0.05)。
     3.大豆黄酮及与半胱胺协同应用可显著提高绒山羊血浆中三碘甲腺原氨酸(Tri-iodo-thyronine,T_3)和胰岛素(Insulin,INS)含量,加强了体内蛋白质的合成与吸收,从而促进绒山羊绒毛生长。其中大豆黄酮组血浆中T_3和INS平均含量较对照组分别提高了29.82%、9.76%(P<0.05);协同组分别提高35.77%、11.18%(P<0.05)。
     4.大豆黄酮及与半胱胺协同应用可改善绒山羊消化代谢,加强瘤胃微生物活动,显著
    
     摘要
    毕曰.巴毕里里巴里里粤.目口巨理
    提高瘤胃液氨氮(NH3一)浓度、总蛋白(TCA一)含量,同时降低盲肠内TCA一P含量。
    二者对瘤胃和盲肠PH值无明显影响。说明试验动物体内蛋白质合成与吸收加强,提高了蛋
    白质的利用率,进而促进了绒山羊绒毛生长.其中,大豆黄酮组瘤胃内的NH3一浓度、TcA一P
    含量分别较对照组提高59.84%、1 5.16%(P切.05);盲肠内TCA一P含量较对照组降低
    4.12%(卜 0.05)。协同组瘤胃内的NH3一浓度、TcA一P含t分别较对照组提高62.12%、17.05%
     (P<0 .05);盲肠内TcA一P含量较对照组降低5.15%叮卜0.05).
     综上所述,大豆黄酮及与半脱胺协同应用可改善绒山羊瘤胃及盲肠的消化代谢,提高
    绒山羊增重并促进其绒毛生长。
Daidzein was a kind of isflavonic phytoestrogen. It had the same weak activity as male animal eatogenic and could increase the number of cytosol estradiol receptor in mammary gland, pituitary gland and hypothalamus which effected the mechanism of heuroendocrine regulation in the growth of animals. Cysteamine had varies biological function because it had activity hydrosulfuryl and amino and it had become a very important biological activity material in vivo. Many studies published had indicated daidzein and cysteamine could improve the weigh gain,fertilitu and immunity of animals. So far there are no report about the effects of daidzein and cysteamine on digest and metabolism and cashmere characteristics in cashmere goats. In this experiment, the effects of daidzein and cysteamine on digest and metabolism and cashmere characteristics in cashmere goats were studied. In this way the mechanism of the weigh gain and wool gain were explored and theory data of the food additives applied to animal husbandry producti
    on were provided.
    Four six month old male cashmere goats were divided into four groups:daidzein(Da)group, cysteamine(CS) group, combination group, control group. The experiment was followed the design of 44 Latin square. It had four periods. Each of them had three weeks for trial and one week for break. The control group was fed with the basic diet,while the Da group was fed with the basic diet added with daidzein 3mg/kg and CS group was fed with the basic diet added with cysteamine 100mg/kg.W.B and combination group was fed with he basic diet added with daidzein 3mg/kg+cysteamine 100mg/kg.W.B. .In this experiment, many indexes such as weigh gain,cashmere characteristics, blood hormone , digest and metabolism were examined and discussed the effects of daidzein and cysteamine on digest and metabolism and cashmere characteristics in cashmere goats.
    The results were as following:
    1. Daidzein and combination of daidzein and cysteamine both could improve the growth and weight of cashmere goats. But the effect of Da group was the best. The weight gains of Da group and combination group were increased by 16.67% and 5.56% respectively (P<0.05),compared with the control group.
    2. Daidzein and combination of daidzein and cysteamine both could obviously improve the growth of cashmere and wool in cashmere goats. The lengths of cashmere and wool were longer than the control and the diameter of cashmere was more slender than it.There were no effects
    
    
    obviously on the strength and elasticity of cashmere and wool. Among them, the effect of combination group was better.
    The natural length and stretched length of cashmere in Da group and combination group were increased by 25.44% and 24.72% and 29.68% and 33.77% respectively,compared with the control group(P<0.05), while the natural length and stretched length of wool in Da group and combination group were increased by 23.68% and 20.88% and 24.95% and 22.37% respectively,compared with the control group(P<0.05).
    The the diameter of cashmere in Da group and combination group were 10.76+ 1.84um and 10.46?.33um and decreased by 3.93% and 6.61% respectively, compared with the control group (PO.05) . The diameter of wool in Da group and combination group were 26.50?.36um and 26.87 ?.37um and increased by 5.03% and 6.50% respectively, compared with the control group (PO.05) .
    3. Daidzein and combination of daidzein and cysteamine both could obviously increase the contents of T3 and INS in the plasma of cashmere goats and improve to prduce and use protein which resulted in the growth of cashmere and wool obviously. The contents of T3 and INS in Da group were increased by 29.82% and 39.98% respectively, compared with the control group
    (PO.05) ,while the contents of T3 and INS in combination group were increased by 35.77% and 39.15% respectively, compared with the control group (PO.05) .
    4. Daidzein and combination of daidzein and cysteamine both could obviously strength the activity of micro-organism and increased the content of NH3-N> TCA-P in rumen
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