枯草芽孢杆菌对花马杂交F1代断奶仔鹿生长性能和血清生化指标的影响

为了研究枯草芽孢杆菌对断奶花马杂交仔鹿的生长性能和血清指标的影响,试验选择1月龄断奶双阳梅花鹿与清原马鹿杂交F1代仔鹿32只(公、母各半),随机分为4组,每组8个重复(公、母各半),每个重复1只鹿,对照组饲喂基础日粮,试验组(Ⅰ组、Ⅱ组、Ⅲ组)分别饲喂日粮中添加0.01%、0.05%、0.10%的枯草芽孢杆菌制剂。结果表明:饲喂枯草芽孢杆菌制剂的试验仔鹿与对照组相比,仔鹿平均日增重显著提高(P0.05),料重比和腹泻率显著降低(P0.05),且日粮中添加0.10%枯草芽孢杆菌制剂的效果更好。此外,添加枯草芽孢杆菌制剂对试验仔鹿的正常血清指标无显著影响(P0.05),说明在日粮中添加枯草芽孢杆菌制剂能促进杂交断奶仔鹿的生长性能,且最佳添加量为0.10%。     

广东小耳花猪妊娠后期母猪日粮中添加维生素A、D、E粉的效果研究

通过在妊娠后期(妊娠85～114 d)母猪日粮中添加维生素A、D、E粉,研究其对母猪产仔指标的影响,进而评估其利用效果。试验结果表明,日粮中添加维生素A、D、E粉,可显著提高母猪产活仔率和降低产死胎率,一定程度上可提高产健仔率、降低产弱仔率、提高初生重等(P>0.05),表现出良好的应用效果。     

桑叶粉和发酵桑叶粉对胡须鸡屠宰性能、肉品质及盲肠菌群的影响

试验旨在研究桑叶粉和发酵桑叶粉对胡须鸡饲养后期屠宰性能、肉品质及盲肠菌群的影响。选用95日龄岭南黄Ⅲ号胡须鸡392只,随机分为7组,即对照组,5%、10%、20%桑叶粉组,5%、10%、20%发酵桑叶粉组。每组4个重复,每个重复14只鸡（7公7母）。预试期4 d,正试期28 d。结果表明：①与对照组相比,除10%桑叶粉组外,其余各试验组鸡半净膛率显著降低（P<0.05）;10%发酵桑叶粉组鸡全净膛率显著降低（P<0.05）,20%发酵桑叶粉及10%桑叶粉组鸡全净膛率极显著降低（P<0.01）;饲喂5%发酵桑叶粉或20%桑叶粉使胡须鸡腿肌率分别极显著或显著降低（P<0.01;P<0.05）。②与对照组相比,各试验组胸肌剪切力和桑叶粉各组腿肌剪切力值均有所下降,但只有10%桑叶粉组胸肌剪切力值显著下降（P<0.05）;20%桑叶粉组腿肌pH_{45 min}显著增加（P<0.05）;各试验组腿肌b^*值均有所降低,其中20%桑叶粉组显著降低（P<0.05）。③与对照组相比,5%、10%桑叶粉组鸡盲肠大肠杆菌数量显著降低（P<0.05）,各试验组盲肠乳酸菌与大肠杆菌比值有提高的趋势,但差异不显著（P>0.05）。综合以上试验结果,桑叶粉可在胡须鸡生长后期日粮中添加至10%,发酵桑叶粉可添加至20%。     

槲皮素对蛋鸡蛋壳品质的影响

试验旨在研究槲皮素对蛋鸡蛋壳品质的影响。选择体重和产蛋率相近的240只29周龄蛋鸡,随机分4组,每组6个重复,每个重复10只。对照组饲喂基础日粮,试验1、2、3组分别在基础日粮中添加0.02%、0.04%、0.06%槲皮素。结果表明:①与对照组相比,产蛋高峰期试验2组的蛋壳相对重极显著提高(P<0.01);在产蛋后期各试验组的蛋壳厚度均显著提高(P<0.05),试验2、3组的蛋壳相对重分别提高0.27%(P<0.05)和0.48%(P<0.01),试验1、2组的鸡蛋破软壳率极显著降低(P<0.01)。②产蛋高峰期各试验组的蛋壳钙含量均显著升高(P<0.05);产蛋后期试验2、3组的蛋壳钙含量显著提高(P<0.05),试验3组蛋壳磷含量显著降低(P<0.05)。③产蛋高峰期和后期各试验组的血清钙含量均极显著提高(P<0.01);在产蛋高峰期试验2组的血清碱性磷酸酶(ALP)含量极显著提高(P<0.01);在产蛋后期试验1组的血清ALP含量极显著降低(P<0.01),试验2、3组的血清羟脯氨酸(Hyp)含量均显著降低(P<0.05)。因此,0.04%槲皮素可有效改善产蛋后期蛋壳品质。     

牛至油对济宁青山羊生长性能、屠宰性能及肉质的影响

为探讨牛至油在青山羊生产中的饲喂效果,选用40只生长期济宁青山羊,按体重随机分成4组(对照组和试验Ⅰ～Ⅲ组),每组10个重复,每个重复1只。对照组饲喂基础日粮,Ⅰ～Ⅲ组在基础日粮中分别添加200、500、800 mg/kg牛至油,测定青山羊的生长性能、屠宰性能及肉质等指标。结果表明:①试验Ⅱ、Ⅲ组平均日增重显著高于对照组(P<0.05),试验Ⅱ组料重比显著低于对照组(P<0.05),试验Ⅱ、Ⅲ组腹泻指数显著低于对照组(P<0.05);②试验Ⅱ组屠宰率显著高于对照组(P<0.05),各组间的净肉率、肉骨比和眼肌面积未有显著变化(P>0.05);③试验Ⅱ、Ⅲ组熟肉率显著高于对照组(P<0.05),试验Ⅱ组青山羊肌肉剪切力显著低于对照组(P<0.05)。综合各项指标,在本试验条件下,生长期济宁青山羊日粮中牛至油的适宜添加水平为500 mg/kg。     

持续低温对断奶仔猪生长性能、饲料养分表观消化率及血液生化指标的影响

为了阐明持续低温对断奶仔猪生长性能、饲料养分表观消化率和血液生化指标的影响。试验采用单因素随机试验设计,选取体重相近[(7.11±0.51) kg],26日龄刚断奶的健康三元(杜×长×大)仔猪108头,依照体重随机分为3个组,每组6个重复,每个重复6头猪,试验A组与试验B组分别饲养于14～18℃和19～23℃下,对照C组饲养于适温24～28℃下,试验期21 d。结果表明:①C组的ADG、ADFI分别比A组和B组高51.04%、22.96%和28.32%、11.08%(P<0.05);C组F/G显著优于A、B组(P<0.05)。②腹泻指数在A组极显著高于B、C组(P<0.01),C组腹泻率较A、B组分别降低9.79、3.85个百分点。③C组干物质表观消化率极显著高于A、B组(P<0.01);A、B组粗蛋白表观消化率较C组分别低4.27、1.82个百分点;A、B组粗脂肪表观消化率较C组分别低7.08、2.51个百分点;A、B组能量利用率较C组分别低1.6、0.5个百分点;④仔猪的TP、ALB含量在A组都显著高于B、C组(P<0.05),B组显著高于C组(P<0.05);A、B两组的GLO含量都显著高于C组(P<0.05)。说明持续低温会显著降低仔猪的生长性能、饲料养分表观消化率,并引起血液中参与机体调节物质含量上升,以应对持续低温的不良影响。     

依普黄酮对笼养蛋鸡生产性能和蛋品质的影响

本试验选用200只24周龄健康海兰褐蛋鸡,随机分为4组:对照组(基础日粮中含钙3.55％)、低钙组(日粮含钙1.27％)、试验Ⅰ组(8 mg依普黄酮/kg低钙日粮)和试验Ⅱ组(20 mg依普黄酮/kg低钙日粮),观察依普黄酮对笼养蛋鸡生产的影响.结果:①试验后期低钙组蛋鸡瘫痪率较对照组显著升高;试验Ⅰ、Ⅱ组瘫痪率则较低钙组显著降低;②试验Ⅰ、Ⅱ组产蛋率分别比低钙组降低8.53％和12.05％(P＜0.01),畸形蛋率分别增加13.06％和23.04％ (P＜0.01),破壳率分别增加22.61％和30.85％(P＜0.01);③试验Ⅰ、Ⅱ组蛋壳厚度分别比低钙组降低2.81％和4.69％ (P＞0.05),蛋比重分别降低0.46％和0.34％(P＜0.01);④低钙组蛋鸡骨密度值比对照组低5.99％(P＜0.05),试验Ⅰ、Ⅱ组骨密度值分别比低钙组高3.43％和4.90％(P＜0.05),试验Ⅰ、Ⅱ组与对照组间骨密度差异不显著(P＞0.05).试验结果提示,在低钙日粮中添加适量依普黄酮能有效减缓骨钙向蛋壳钙转移的速率,从而维持笼养蛋鸡的骨密度,降低其瘫痪的发生率.     

益生素对蛋鸡生产性能、生化指标及蛋品质的影响

选用720只55周龄海兰蛋鸡,随机分成4组,每组6个重复。对照组饲喂基础日粮,在基础日粮中添加0.015%土霉素为试验1组,添加0.01%益生素为试验2组,添加0.02%益生素为试验3组,研究益生素对蛋鸡生产性能、生化指标及蛋品质的影响。试验表明:与对照组相比,试验2、3组产蛋率有所提高,料蛋比分别降低4.74%(P<0.05)、2.84%(P<0.05),破损率和次蛋率差异显著,腹泻率分别降低62.53%(P<0.01)、59.54%(P<0.01);试验2、3组谷丙转氨酶活性分别降低41.67%(P<0.05)、37.50%(P<0.05),总胆固醇含量分别降低28.77%(P<0.05)、14.61%(P<0.05),低密度脂蛋白含量分别降低40.28%(P<0.05)、29.72%(P<0.05);在蛋品质方面,试验2、3组蛋中胆固醇含量比对照组分别降低30.39%(P<0.01)、31.95%(P<0.01),蛋白质含量分别提高18.94%(P<0.05)、22.06%(P<0.05),灰分含量分别提高27.56%(P<0.05)、24.41%(P<0.05)。综合各项指标以添加0.01%益生素的试验2组效果最佳。     

日粮中添加竹枝粉对肉兔生长性能及饲养经济效益的影响

为研究日粮中以不同比例的竹枝粉代替苜蓿草粉对肉兔生长性能和经济效益的影响,试验将176只30日龄体重相近的加利福尼亚断奶肉兔随机分成4组,其中Ⅰ、Ⅱ、Ⅲ组为试验组,分别在基础日粮中添加10％竹枝粉+17％苜蓿草粉、15％竹枝粉+12％苜蓿草粉、18％竹枝粉+9％苜蓿草粉;Ⅳ组(对照组)在基础日粮中添加27％苜蓿草粉.结果表明:试验Ⅰ、Ⅱ、Ⅲ组料重比均极显著低于对照组(P<0.01),分别较对照组降低16.27％、9.6％、3.47％;各试验组日增重均极显著高于对照组(P<0.01),分别比对照组提高19.29％、9.19％、3.67％;各试验组的饲养经济效益均极显著高于对照组(P<0.01),分别比对照组提高60.08％、36.84％、20.80％.由此可见,10％竹枝粉+17％苜蓿草粉组饲喂效果最好.     

苜蓿草粉对肉兔脂质代谢和抗氧化性能的影响

本研究旨在探讨苜蓿草粉对肉兔脂质代谢和抗氧化性能的影响。采用随机区组试验设计将120只生长兔分为6组,即分别在日粮中添加0(对照组)、20%(试验Ⅰ组)、30%(试验Ⅱ组)、40%(试验Ⅲ组)、50%(试验Ⅳ组)和60%(试验Ⅴ组)的苜蓿草粉,试验期45 d。结果表明:①除试验Ⅴ组外,血液中的甘油三酯和总胆固醇含量随苜蓿草粉的增加而降低;②肝脏和肌肉中总胆固醇、甘油三酯含量随苜蓿草粉添加量的增加而降低,但只有肌肉中的总胆固醇含量在试验组间存在差异性,即试验Ⅳ组显著低于对照组(P<0.05),其余均不显著(P>0.05);③血清、肝脏及肌肉中超氧化物歧化物酶和谷胱甘肽过氧化酶含量随苜蓿草粉的增加而显著升高(P<0.05),丙二醛含量显著降低(P<0.05)。提示,在肉兔日粮中添加40%~50%苜蓿草粉能起到降低肉兔血液和肌肉中总胆固醇含量,提高兔体抗氧化性能的作用。     

维生素E对蛋鸡肉品质的影响

本试验旨在研究蛋鸡日粮中添加不同剂量的维生素E对蛋鸡肉品质的影响.试验选取健康无病且生产性能相近的400日龄海兰灰蛋鸡224只,随机分成4组,每组4个重复,每个重复14只,维生素E添加水平分别为0、0.075、0.15、0.3 g/kg,试验期4周.结果表明:维生素E对肉品质有一定影响,添加维生素E对提升宰后24h腿肌pH、降低胸肌腿肌煮熟损失、提高腿肌系水力、降低腿肌剪切力均有显著影响(P＜0.05),日粮中添加维生素E 0.15 g/kg和0.3 g/kg,能显著提高鸡腿肉色L值(P＜0.05).综合评定结果显示,0.15 g/kg的维生素E为适宜添加量.     

Effects of different formulations of α-tocopherol acetate (vitamin E) on growth performance,meat quality and antioxidant capacity in broiler chickens

1. The objective of this study was to investigate and compare the effects of α-tocopherol acetate (vitamin E (VE)) and microencapsulated VE (MVE) on growth performance, meat quality and antioxidant capacity in broiler chickens.

2. A total of 360 d-old broiler chicks were procured and randomly allocated into three groups with 6 replicates. Each replicate had 20 chickens. Chickens were fed with basal diets (CON group) or experimental diets supplemented with 20 mg/kg VE (VE group) or 20 mg/kg MVE (MVE group) for 42 d.

3. The results showed that the MVE group had higher body weight gain (BWG) than the CON and VE groups, and higher gain/feed ratio (G/F ratio) than the CON group during the period of 22–42 d. During the whole experiment, a higher increase in BWG was found in the MVE group than the CON group.

4. Chickens fed on diets supplemented with the VE or MVE had lower abdominal fat percentage, higher pH and antioxidant enzyme activity than the CON group in the breast meat.

5. There was an increased tendency in the hepatic glutathione peroxidase (GSH-Px) enzyme activity of the VE and MVE groups than the CON group. The hepatic mitochondrial total antioxidant capacity and GSH-Px enzyme activity in the MVE group were higher than the CON group. Hepatic 2,2-dipheny-?-picrylhydrazyl scavenging activity of the MVE group was higher than the CON group.

6. These results suggested that the dietary addition of VE or MVE could improve breast meat quality in broilers. MVE supplementation may improve growth performance, hepatic mitochondrial antioxidant capacity and free radical scavenging capacity in chickens. In addition, dietary supplementation of MVE gave better broiler growth performance than VE.

     

Effects of dietary vitamin E and fat supplementation on pork quality

The effects of dietary vitamin E (VE, alpha-tocopherol acetate) and fat supplementation on growth and carcass quality characteristics, oxidative stability of fresh and cooked pork patty in storage, fatty acid profiles of muscle and adipose tissue, and VE concentrations of plasma, muscle, and adipose tissue were studied. Six hundred pigs were allocated to 1 of 6 diets and fed for 63 d in a 3 x 2 factorial design. The dietary treatments included 3 fat levels (normal corn, high oil corn, high oil corn plus added beef tallow) and 2 levels of VE supplementation (40 IU/kg, normal VE supplementation; and 200 IU/kg, high VE supplementation). At 113 kg of BW, 54 pigs were slaughtered as a subsample to evaluate dietary effects on pork quality. Growth performance and meat quality characteristics did not differ (P > 0.05) among treatment groups. The high level of VE supplementation had a beneficial effect on the oxidative stability of pork as indicated by thiobarbituric acid reactive substance (TBARS) values. Lean tissue had lower (P < 0.05) TBARS in the group fed the high VE than in those fed the normal VE level. The TBARS values differed among storage periods (0 to 6 d) and also between fresh and cooked ground ham. Fat type did not significantly affect total saturated and unsaturated fatty acids proportions in the neutral and polar fraction of muscle. Adding VE acetate led to greater (P < 0.05) monounsaturated and total unsaturated fatty acid proportions in neutral lipids of muscle and adipose tissues. Increasing dietary levels of VE acetate increased the concentration of VE in plasma and muscle. These results indicate that dietary VE acetate supplementation increased (P < 0.05) lipid stability and the VE concentration of muscle.     

日粮添加酵母硒及维生素E对苏禽3号肉鸡肉品质和抗氧化能力的影响

试验旨在研究酵母硒及维生素E单独或者联合添加对苏禽3号肉鸡生长性能、肌肉品质、抗氧化能力及基因表达的影响.试验选择体重相近的苏禽3号肉鸡240只,随机分为4组,每组60只.分别为对照组、350 μg/kg酵母硒添加组(试验1组)、50 mg/kg维生素E添加组(试验2组)、350 pg/kg酵母硒+50 mg/kg维生...     

Investigation into selenium requirement of growing turkeys offered a diet supplemented with two levels of vitamin E

To evaluate dietary selenium (Se) requirement in turkeys offered a diet supplemented with two levels of vitamin E (VE), 96 newly hatched male BIG 6^® chicks (58.4 ± 4.12 g) were divided into eight groups of 12 animals each and fed maize soya diets containing 0.05, 0.10, 0.20 and 0.30 mg Se/kg from sodium selenate in combination either with the natural VE content (approximately 10 IU/kg) or with a VE addition of 50 IU/kg. Animals from all the groups were highly performant and their final body weights (1746 ± 190 g) after 35 days on experiment were not significantly different. According to its dietary supply, Se concentration in the liver and plasma increased dose dependently. Independent of dietary VE, the activities of GPx3 in plasma and of GPx1 in liver and breast muscle increased to a larger extent in turkeys supplemented with 0.10 and 0.20 mg Se/kg in relation to animals with low marginal Se supply (0.05 mg/kg). Supplementation of 0.30 mg Se/kg only slightly increased further selenoprotein activities. 2‐Thiobarbituric acid reactive substances in the liver were strongly reduced by dietary VE, but not by Se. Plasma aspartate aminotransferase (AST) and creatine kinase (CK) activities did not show muscular lesions in none of the groups. Although there were no signs of muscular lesions even in turkeys with marginal Se and moderate VE supply, the activity of selenoproteins in various organs increased up to 0.30 mg Se/kg diet, independent of VE supply. It was concluded that for growing turkeys the Se supply should meet at least a level of 0.20 mg/kg diet as currently recommended by the National Research Council and Gesellschaft für Ernährungsphysiologie. Vitamin E addition confirmed the particular function of the vitamin as a lipid antioxidant and should be taken into consideration when diets with high PUFA concentrations are fed.     

Effects of supplemental vitamin E in diet of Japanese quail on male reproduction, fertility and hatchability

1. Two experiments were conducted to examine the effect of feeding higher supplemental vitamin E (VE) concentrations on male reproductive variables, fertility and hatchability of quails. 2. In experiment 1, sixty 5-week-old male quails, reared in individual cages, were fed male breeder diets supplemented with 0, 75, 150, 225 or 300 IU alpha-tocopherol acetate/kg. At 10 weeks, observations on cloacal gland size, foam production, testes weight and blood samples for testosterone estimation were taken. 3. In experiment 2, 50 male and 50 female cage-reared quails (5 weeks old) were fed male breeder and layer rations, respectively, supplemented with 0, 75, 150, 225 or 300 IU/kg. At 13 weeks, 9 different mating pairs (5 pairs/group) were formed. Group 1 contained one control male and one control female in each of 5 pens. In groups 2 to 5, control males were paired with females on supplements of 75, 150, 225 or 300 IU/kg. In groups 6 to 9, control females were paired with males on supplements of 75, 150, 225 and 300 IU/kg. During subsequent adaptation and egg collection periods, each of 10 d, control layer ration was fed to all groups. All the eggs laid during the 10-d egg collection period were incubated artificially to estimate fertility and hatchability. The trial was repeated at 15 weeks. 4. Adult male quails receiving moderate supplemental VE (75 and 150 IU/kg) had a higher cloacal gland index, quantity of foam secretion, testicular weight and plasma testosterone than quails fed on either VE-deficient or more highly supplemented diets (225 and 300 IU alpha-tocopherol acetate/kg). 5. It was concluded that a supplement of 75 IU VE/kg in maize/soybean diet could provide the best reproductive performance of male breeder quails. Cloacal gland index, quantity of foam secretion, testicular weight and plasma testosterone can serve as indirect indicators of testicular activity and fertilising ability in quails. Supplemental VE did not affect the fertility and hatchability of male and female Japanese quails.     

日粮中添加不同水平的维生素E对小白牛肉贮存期间滴水损失率和TBA值的影响

本试验考察了饲料中添加维生素E(VE)对小白牛肉(中国荷斯坦公犊牛)贮存期间滴水损失率和TBA值的影响。试验选取16头小白牛,按体重随机分为4组,每组4头。在屠宰前30d每天添加不同水平的VE,添加水平分别为0mg/d、500mg/d、800mg/d和2 000mg/d。屠宰后将牛肉贮存14d。贮存期间选取滴水损失率和TBA值作为肉品质的考察依据。结果表明:随着贮存时间的延长,各组牛肉滴水损失率增加,而不同添加水平间差异不显著(P>0.05)。TBA值随时间延长而升高,从第4天开始,VE0组和VE500组,与VE800组和VE2000组之间差异显著(P>0.05),VE0组与VE500组,VE800与VE2000组之间差异均不显著(P>0.05)。表明饲料中添加VE800mg/d可使小白牛肉有很好的抗氧化效果。     

The effect of vitamin E on growth performance and meat quality in broilers given diets containing distillers’ dried grain with solubles (DDGS)

1. The objective of the present study was to investigate the effect of vitamin E (VE, α-tocopherol acetate) on growth performance and meat quality of broilers fed on diets containing maize distillers’ dried grains with solubles (DDGS).

2. A total of 360 one-d-old broilers were randomly assigned to 6 groups. Each group comprised 6 replicates of 10 broilers. Broilers were allocated to 1 of 6 diets and fed for 49?d in a 3?×?2 factorial design. The dietary treatments included three concentrations of DDGS (0, 10 or 20%) and two concentrations of VE (0 or 200?mg/kg).

3. Diets containing 20% DDGS decreased the growth phase and average daily feed intake, demonstrating that small amounts of DDGS affected feed intake in broilers and that an excess of DDGS was not conducive to feed intake.

4. Different dietary concentrations of DDGS did not significantly improve colour, drip loss, cooking loss, or shear force. Supplementation with 200?mg/kg VE significantly reduced cooking loss and shear force and improved colour.

5. In conclusion, supplementation with DDGS at 10% and/or α-tocopherol acetate at 200?mg/kg had positive effects on growth performance and meat quality in broilers.     

Effect of dietary vitamin E supplementation and feeding period on pork quality

Feeding increased levels of dietary vitamin E can inhibit lipid oxidation. The aim of this study was to investigate the effect of levels of dietary alpha-tocopherol acetate (VE) and feeding duration on meat quality and lipid oxidation. Eighty-one pigs were allocated to 1 of 3 diets containing 40, 200, or 400 IU of VE/kg of feed, and each diet group was divided into 3 feeding periods (3, 6, or 9 wk). Carcass characteristics and meat quality were evaluated. Oxidative stability of fresh and cooked pork patties and pork chops was determined after chilled or frozen storage. Increasing dietary concentrations of VE did not affect any growth performance parameter. Drip loss, however, decreased (P < 0.05) with increased dietary VE levels. Moreover, an increased duration of VE feeding improved (P < 0.05) pH and drip loss. Less lipid oxidation (P < 0.05) was detected in fresh ground pork from pigs fed greater concentrations of VE after 4 d of storage. A greater (P < 0.05) resistance to oxidation in cooked ground pork was observed in pigs fed 200 or 400 IU of VE/kg at 2 and 6 d of storage. Fresh and cooked pork patty oxidation decreased (P < 0.05) linearly as feeding duration increased from 3 to 9 wk. After 6 mo of freezer storage, lipid oxidation of pork chops from pigs fed 200 or 400 IU of VE/kg was lower (P < 0.05) than for pigs fed 40 IU of VE/kg. Likewise, lipid oxidation of pork chops of pigs fed VE for an extended period of time (6 wk) was lower (P < 0.05) after 9 mo of storage. Fatty acid profiles of neutral lipid fraction of the LM became more unsaturated (P < 0.05) with added VE to the feed. These results indicate an increased intake of dietary VE concentration, and prolonged feeding of VE can improve drip loss and reduce lipid oxidation in ground pork and pork chops. This study suggests that supplementation with 200 IU of VE/kg of feed for 6 wk before market is beneficial in improving lipid stability and pork quality.     

日粮添加氧化鱼油及硒和维生素E对育肥猪生产性能的影响

试验旨在研究氧化鱼油对育肥猪后期生产性能和冷藏生猪肉肉质的影响以及硒和维生素E的抗氧化作用。将40头DLY杂交猪(59.4kg)分为4个处理,对照组和3个添加剂组(0.3mg/kg硒,100mg/kg维生素E,0.3mg/kg硒+100mg/kg维生素E)。试猪平均体重为81.3kg时,将每个处理的10头猪各分为2组,分别在日粮中添加5%新鲜和氧化鱼油,试猪于平均体重109.8kg时屠宰取样。结果表明:①各处理组血清乳酸脱氢酶(LDH)和冷藏0~6d肉样的TVB-N、pH、L*无显著差异。②氧化鱼油显著提高肌肉丙二醛(MDA)含量,肉色b*值和血清尿素氮(BUN)、丙二醛(MDA)(P0.05);③油脂和添加剂在日增重(ADG)、滴水损失、肉色a*值、血清超氧化物歧化酶(SOD)和谷胱甘肽过氧化物酶(GPx)活性上表现显著的互作效应(P0.05)。本试验结果表明育肥后期添加5%氧化鱼油5周,对冷藏2d肉样b*值和2、4d肉样MDA含量有显著影响,硒和维生素E表现显著的抗氧化效应和与氧化鱼油的互作效应,硒+维生素E的添加在氧化鱼油组的作用效应大于新鲜鱼油组。