α-硫辛酸对育肥猪脂肪代谢的影响

研究日粮中添加α-硫辛酸对肥育猪脂肪代谢的影响。对照组饲喂基础日粮,试验组在基础日粮中分别添加300、600和900 mg/kg的α-硫辛酸,试验期28 d。结果表明：α 硫辛酸添加组血清中总胆固醇和甘油三酯均显著低于对照组,对低密度脂蛋白含量及高密度脂蛋白、肝脂酶活性均无显著影响。血清脂肪酶和脂蛋白脂酶活性随着α-硫辛酸添加水平的提高而增加,其中添加600、900 mg/kg α 硫辛酸组的脂肪酶活性与对照组相比提高显著,900 mg/kg组的脂蛋白脂酶活性与对照组差异达到显著水平。α-硫辛酸的适宜添加水平为600~900 mg/kg。     

α-硫辛酸对育肥猪脂肪代谢的影响

研究日粮中添加α-硫辛酸对肥育猪脂肪代谢的影响.对照组饲喂基础日粮,试验组在基础日粮中分别添加300、600和900 mg/kg的α-硫辛酸,试验期28 d.结果表明:Ⅱ-硫辛酸添加组血清中总胆固醇和甘油三酯均显著低于对照组,对低密度脂蛋白含量及高密度脂蛋白、肝脂酶活性均无显著影响.血清脂肪酶和脂蛋白脂酶活性随着α-硫辛酸添加水平的提高而增加,其中添加600、900 mg/kg α-硫辛酸组的脂肪酶活性与对照组相比提高显著,900mg/kg组的脂蛋白脂酶活性与对照组差异达到显著水平.α-硫辛酸的适宜添加水平为600～900 mg/kg.     

α-硫辛酸对育肥猪免疫功能的影响

试验选择体重80 kg左右的杜长大三元杂交育肥猪96头,随机分为4个处理组,每个处理4个重复,每个重复6头猪,研究日粮中添加α-硫辛酸对育肥猪免疫功能的影响。对照组饲喂基础日粮,试验组在基础日粮中分别添加300、600和900 mg/kg的α-硫辛酸,试验期28 d。结果表明,α-硫辛酸添加组血清中IgG含量、IL-2的浓度均显著高于对照组,对IgA和IgM含量均无显著影响。血清中IL-6和TNF-α随着α-硫辛酸添加水平增加而下降,其中600和900 mg/kgα-硫辛酸添加组的IL-6和TNF-α浓度与对照组相比下降显著,900 mg/kg组的IL-6浓度与300 mg/kg组差异达到显著水平。这表明硫辛酸可以调节免疫球蛋白和细胞因子水平,提高育肥猪体液免疫水平,进而改善其免疫功能。α-硫辛酸的适宜添加水平为600～900 mg/kg。     

乳化剂对育肥猪肌肉品质和抗氧化性能的影响

探讨乳化剂对育肥猪肌肉品质和抗氧化性能的影响.结果表明:在育肥猪日粮中添加200 mg/kg乳化剂,对肌肉颜色、pH值、失水率和熟肉率无显著影响(P＞0.05),但试验组滴水损失降低显著(P＜0.05),肌内脂肪提高显著(P＜0.05).与对照组相比,试验组肌肉超氧化物歧化酶活力增加(P＞0.05),丙二醛含量下降(P＜0.05).     

超微粉碎银杏叶对生长育肥猪生产性能及抗氧化功能的影响

探讨超微粉碎银杏叶对生长育肥猪生产性能、血清及肝脏抗氧化功能的影响。结果表明：与对照组相比,试验组平均日增重均有所提高,料重比均有所降低,但差异均不显著;0.25%超微粉碎银杏叶组血清丙二醛含量显著低于对照组,各组间血清总抗氧化能力、谷胱甘肽过氧化物酶及总超氧化物歧化酶活性差异均不显著差异;各组间肝脏总抗氧化能力、谷胱甘肽过氧化物酶及总超氧化物歧化酶活性、丙二醛含量差异均不显著。生长育肥猪饲粮中超微粉碎银杏叶适宜的添加水平为0.25%。     

生物抗氧剂α-硫辛酸的保健功能

被誉为“万能抗氧剂”的α-硫辛酸是近年来不断研究开发的一种极强体内活性功能因子。对α-硫辛酸的抗衰老、解毒、降糖、辐射保护、应激保护、皮肤保健、保肝护肝等保健功能作概要论述。     

低聚壳聚糖对生长育肥猪抗氧化性能、脂类代谢和肌肉品质的影响

研究低聚壳聚糖对生长育肥猪抗氧化性能、脂类代谢和肌肉品质的影响。结果表明:与对照组相比,低聚壳聚糖组可显著提高血清总抗氧化能力,其中40mg/kg低聚壳聚糖组达到极显著水平(P<0.01);对血清过氧化氢酶活性、丙二醛浓度和谷胱甘肽过氧化物酶活性无显著影响(P>0.05);可降低血清中总胆固醇、高密度脂蛋白胆固醇和低密度脂蛋白胆固醇的含量,但差异均不显著(P>0.05);20mg/kg低聚壳聚糖能显著提高宰后眼肌L*45min(P<0.05),显著降低眼肌a*45min和a*24h(P<0.05),40mg/kg低聚壳聚糖也能显著降低眼肌a*24h(P<0.05),但两者对眼肌熟肉率、蒸煮损失、失水率、滴水损失和pH值无显著影响(P>0.05)。低聚壳聚糖以40mg/kg添加量较好。     

益生素对生长猪生产性能和免疫功能的影响

研究在生长猪日粮中添加益生素替代抗生素的可行性以及最佳用量.在对照组基础日粮中添加抗生素,在试验Ⅰ组、Ⅱ组和Ⅲ组日粮中分别添加0.1％、0.2％和0.4％益生素替代抗生素.结果表明:(1)与对照组相比,试验Ⅰ组、Ⅱ组和Ⅲ组平均日增重分别提高-9.80％ (P＜0.05)、0.81％ (P＞0.05)和1.35％ (P＞...     

生物型添加剂对育肥猪生产性能及药物残留的影响

北京市生猪存栏230万头,年出栏420万头;猪肉产量26万t,占市场需求的55%～60%.饲养方式以规模猪场和养殖小区为主,生猪年出栏280万头,占全市生猪年出栏的65%;万头以上的猪场100余个,其中5万头以上的猪场4个.     

茶多酚对生长育肥猪生长性能和肉质的影响研究

添加0.1%茶多酚复合添加剂能显著提高生长育肥猪的平均日增重、猪肉pH值;添加0.3%时能极显著提高平均日增重、pH值,极显著降低失水率;当添加水平继续增大时作用不大.荼多酚的添加对背膘厚度、瘦肉率和肉色影响不显著,但对猪肉VE和肌苷酸(IMP)的含量极显著增加.茶多酚复合添加剂的适宜水平为0.3%.     

Effects of dietary supplementation of cysteamine on growth performance,carcass quality,serum hormones and gastric ulcer in finishing pigs

A study was conducted to determine the effects of graded levels of dietary inclusion of a cysteamine (Cs) preparation on growth performance, carcass quality, plasma hormone levels, gastric pH and occurrence of gastric ulcer in finishing pigs. A total of 384 Landrace × Large White finishing pigs, (192 gilts and 192 barrows) with an average initial body weight of 66.05 ± 0.623 kg (mean ± SEM) were randomly divided into 24 floor pens, with eight gilts and eight barrows in each pen (9.2 m²) as one experimental unit. The 24 pens of pigs were randomly allocated to one of three diets: (1) a maize/soybean meal basal diet; (2) the basal diet plus 30 mg Cs kg^?1 diet; and (3) the basal diet plus 50 mg Cs kg^?1 diet. Dietary supplementation of Cs had quadratic effects (P < 0.01) on final body weight and average daily gain, with optimal responses occurring at 30 mg kg^?1. Dietary supplementation of Cs quadratically improved (P < 0.01) average daily feed intake and feed/gain ratio, with optimal responses occurring at 30 mg kg^?1. Dietary supplementation of Cs had a quadratic effect (P < 0.01) on muscle RNA/DNA ratio. Furthermore, dietary supplementation of Cs reduced (P < 0.05) back‐fat thickness. Dietary supplementation of Cs had quadratic effects (P < 0.05) on plasma glucagon and T₃ hormone levels, with optimal responses occurring at 30 mg kg^?1, but had no effect (P > 0.05) on plasma growth hormone, insulin and T₄ levels. There were no apparent pathological changes seen in the stomach mucosa of pigs fed at 30 mg Cs kg^?1 compared with the control diet. It is concluded that a low dose of dietary inclusion of Cs at 30 mg kg^?1 can improve growth performance and carcass quality without adverse effects on the stomach in finishing pigs. Copyright © 2005 Society of Chemical Industry     

日粮中添加DDGS对五指山大猪生长性能和血清生化指标的影响

研究饲粮中添加两种不同水平的DDGS对五指山猪生长性能和血清生化指标的影响。选择48头体重约18kg的五指山大猪,随机分为3组,每组4个重复,对照组饲喂基础饲粮,试验Ⅰ组、II组DDGS使用量分别是22%,25%,进行为期30d的饲养试验。结果表明,与饲喂基础饲粮组相比,22%DDGS组平均增重、平均日增重和料重比差异不显著;25%DDGS组平均增重和平均日增重显著降低,料重比增加显著。3个组平均增重所需的饲料成本分别为13.57、12.80和12.87元/kg。本试验条件下,五指山大猪饲料中DDGS适宜添加水平为22%。     

普通和乳化植物甾醇对育肥猪生长性能、血清生化指标和养分消化率的影响

本试验旨在研究普通和乳化植物甾醇对育肥猪生长性能、血清生化指标和养分消化率的影响。选用75头初始重为60 kg左右的杜长大育肥猪随机分为3组,其中对照组饲喂基础日粮,试验组在基础日粮中分别添加30 mg/kg普通植物甾醇(Ⅰ组)或乳化植物甾醇(Ⅱ组)。试验期为52 d。2种植物甾醇对育肥猪生产性能无显著影响,但显著降低血清总胆固醇(TC)、甘油三酯(TG)水平和白球比(A/G)(P0.05),显著提高血清总蛋白(TP)和球蛋白(GLO)水平(P0.05),Ⅰ组血清白蛋白(ALB)含量显著低于对照组(P0.05),而Ⅱ组无显著差异;显著提高育肥猪对干物质、有机物、粗蛋白的消化率(P0.05),Ⅱ组粗脂肪消化率亦显著高于对照组(P0.05)。结果显示,在育肥猪日粮中添加30 mg/kg 2种植物甾醇可改善养分消化率,调节血脂和蛋白质代谢,且从血清ALB和粗脂肪消化率数据来看,乳化植物甾醇的作用效果优于普通植物甾醇。     

乳酸菌发酵饲料对生长猪生产性能的影响

研究了乳酸菌发酵饲料对规模化猪场生长猪生产性能和健康的影响。对照组直接饲喂基础日粮,1组饲喂"基础日粮+20%乳酸菌发酵饲料(风干)",2组饲喂"基础日粮+30%乳酸菌发酵饲料(风干)",3组饲喂"基础日粮+50%乳酸菌发酵饲料(风干)"。结果表明:1、2和3组平均日增重比对照组分别提高了9.67%、11.47%和13.68%,3组与对照组相比差异极显著,1、2组与对照组相比差异显著;1、2和3组头平均日采食量比对照组分别提高了3.47%、4.16%和4.88%,3组与对照组相比差异极显著,1、2组与对照组相比差异显著。1、2和3组料肉比比对照组分别下降了5.16%、6.35%和7.54%,发病率比对照组分别降低了38.46%、46.15%和69.23%;1、2和3组比对照组多盈利22.7%、26.8%和31.6%。     

日粮胆碱水平与宫内发育迟缓对猪肝脏抗氧化能力的影响

本实验旨在研究日粮胆碱水平与宫内发育迟缓（intrauterine growth retardation,IUGR）对猪生产性能及肝脏抗氧化指标的影响。从正常分娩的母猪中选择正常初生重（normal birth weight,NBW）和IUGR新生仔猪各12头,所有仔猪于23d龄断奶。实验采用2×2因子设计,NBW仔猪和IUGR仔猪各分别饲喂基础日粮（正常胆碱水平,NC）与添加胆碱的实验日粮（高胆碱水平,HC）,即NBW+NC、NBW+HC、IUGR+NC与IUGR+HC四组。结果表明:与NBW猪相比,IUGR显著降低了猪23d龄、73d龄及120d龄时的体重,猪200d龄时,IUGR组体重与正常组相比仍有降低趋势;IUGR有降低200d龄猪肝脏中T-AOC的趋势,并显著降低了肝脏清除DPPH·的能力（p<0.05）;高胆碱水平可显著降低肝脏中MDA的含量（p<0.05）,并使肝脏T-AOC、SOD的活性及清除DPPH·的能力显著升高（p<0.05）。结论:IUGR猪生长缓慢,高胆碱日粮可以改善肝脏抗氧化能力,使其在生长发育后期生长性能显著提高。      

Effect of amino acid level in the pig diet during growing and early finishing on growth response during the late finishing phase of lean meat type gilts

BACKGROUND: This experiment examined the influence of different amino acid levels during the growing and early finishing diet and the late finishing diet on growth performance and carcass quality of a lean meat type gilt. In a two by two factorial trial, 96 gilts were divided over four treatments. The two factors were (1) amino acid level in growing and early finishing and (2) amino acid level in late finishing. For the low amino acid diets we lowered the lysine, methionine, threonine and tryptophan levels by 20% and 30% in the growing and two finishing phases, respectively. RESULTS: Restricting amino acid levels in growing and early finishing led to a decreased growth rate but improved efficiency of amino acid use, which lasted into the subsequent phase. Pigs on a high amino acid diet in late finishing pigs were able to compensate to a large extent for amino acid restriction in growing and early finishing. Amino acid content in late finishing determined carcass quality. CONCLUSION: In the lean meat type gilts used in this experiment, restricting amino acid concentrations by 20% in the growing and 30% in the early finishing phase increased the growth rate and efficiency of growth in the subsequent late finishing phase. In order to obtain good carcass quality, it is crucial to provide the animals with a balanced diet during the late finishing phase. Copyright © 2011 Society of Chemical Industry