首页 | 本学科首页   官方微博 | 高级检索  
相似文献
 共查询到20条相似文献，搜索用时 182 毫秒
1.
选择体重基本一致的30日龄齐卡兔60只(公母各半),随机分成5组,即A组(对照组)、B组、C组、D组和E组,每组3个重复,每重复4只,单笼饲养。其中对照组饲喂基础日粮,其余各组分别在基础日粮中添加喹赛多50mg/kg、喹赛多100mg/kg、喹乙醇50mg/kg、喹乙醇100mg/kg,进行为期60d的饲养试验。结果表明:各组添加剂均能显著提高肉兔日增重(P<0.05);100mg/kg喹赛多组与对照组日耗料量相当,而其它各组日耗料量则显著低于对照组(P<0.05);各试验组与对照组相比,均能显著降低料重比(P<0.05),但各试验组间差异不显著(P>0.05);各组添加剂均能降低肉兔腹泻率。综合评价,喹赛多组优于喹乙醇组,适宜添加量为100mg/kg。  相似文献   

2.
OBJECTIVE: To assess effects of high dietary amounts of vitamin C or vitamin E and oxidative stress on the heart and growth performance of broilers maintained at an altitude of 2,200 m above sea level. ANIMALS: 360 chicks (1-day-old broilers). PROCEDURE: Birds were randomly assigned to 3 groups (120 chicks/group). Each group of birds was fed a specific diet (control group, basal diet containing 12 mg of vitamin E (DL-alpha-tocopherol acetate)/kg of feed without additional ascorbic acid; vitamin E group, basal diet supplemented with 75 mg of vitamin E/kg of feed; and vitamin C group, basal diet supplemented with 400 mg of ascorbic acid/kg of feed) throughout the entire 7 weeks of the study. Feed consumption and body weight of chicks were recorded on a weekly basis. Nine randomly selected birds from each group were euthanatized each week. Remaining birds were euthanatized at the end of the study. Samples of cardiac tissues were obtained to measure thiobarbituric acid reactive substances (TBARS), an indicator of oxidative stress. RESULTS: Vitamin E-supplemented diets resulted in better growth performance, lower rates of feed conversion, and lower TBARS content. Vitamin C-supplemented diets resulted in lower feed consumption and lower rates of feed conversion. When used separately, neither of the vitamins had any effect on mortality attributable to ascites syndrome. CONCLUSION AND CLINICAL RELEVANCE: It is recommended that diets supplemented with vitamin C, vitamin E, or both be fed to broilers maintained at an altitude of 2,200 m above sea level to improve growth performance.  相似文献   

3.
本试验旨在研究谷氨酰胺对肉兔肠道发育的影响。试验选择28日龄断奶新西兰白兔360只,随机分成4个组,每个组9个重复,每个重复10只(公母各占1/2)。4组试验兔分别饲喂在基础饲粮基础上添加0(对照)、0.4%、0.8%和1.2%谷氨酰胺的试验饲粮,试验期为4周。结果表明:饲粮添加谷氨酰胺对肉兔35、42和56日龄时的胃重、盲肠重和小肠长度以及56日龄时的小肠重无显著影响(P0.05),但饲粮添加0.8%谷氨酰胺可以显著提高肉兔35和42日龄时的小肠重(P0.05);饲粮添加0.8%和1.2%谷氨酰胺可以显著提高肉兔35和42日龄时的十二指肠和空肠绒毛高度(P0.05),同时饲粮添加0.8%谷氨酰胺还可以显著提高肉兔35和42日龄时的回肠绒毛高度以及56日龄时的十二指肠和空肠绒毛高度(P0.05);饲粮添加0.8%谷氨酰胺可以显著降低肉兔35和42日龄时的十二指肠和空肠隐窝深度以及35日龄时的回肠隐窝深度(P0.05)。由此可见,饲粮添加谷氨酰胺可以促进肉兔断奶后1~2周的肠道发育,本试验条件下,肉兔饲粮中谷氨酰胺适宜添加水平为0.8%。  相似文献   

4.
This study investigated the effects of supplemental Mg, Trp, vitamin C, vitamin E, and herbs on stress responses, skin lesions, and meat quality of slaughter pigs (106.0 +/- 8.6 kg of BW). These 5 supplements were tested in 4 similar experiments. In Exp. 1, 2 treatments were tested: 1) control treatment without supplementation, and 2) supplementation of an herbal product (2.5 g/L of drinking water for 2 d). Eighty-eight pigs per treatment were involved, of which 40 were selected for meat quality measurements (over 4 replicates). The experimental design of Exp. 2 and 3 was the same as Exp. 1, except that in Exp. 2 Mg (3 g/L of drinking water for 2 d) was supplemented and in Exp. 3 Trp (6 g/kg of feed, as-fed basis) was supplemented. In Exp. 4, 3 treatments were tested: 1) control treatment without supplementation, 2) supplementation of vitamin C (300 mg/kg of feed for 21 d, as-fed basis), and 3) supplementation of vitamin E (150 mg/kg of feed for 21 d, as-fed basis). In Exp. 4, 66 pigs per treatment were used, of which 42 were evaluated for meat quality (over 6 replicates). Pigs supplemented with vitamin E ate less than control (P = 0.03) or vitamin C-supplemented pigs (P = 0.03). Pigs were transported to a commercial slaughterhouse and were slaughtered after a lairage period. Blood sampling at slaughter revealed no differences between the control and supplemented pigs in plasma cortisol, glucose, lactate, or creatine kinase concentrations. Pigs provided with Mg (P = 0.002) or Trp (P = 0.04) had lower plasma NEFA concentrations than control pigs, and pigs supplemented with vitamin C had greater concentrations than the control (P = 0.03) or vitamin E-supplemented pigs (P = 0.01). Supplementation of the herbal product increased the frequency of pigs with shoulder (P = 0.05) and loin lesions (P = 0.03), whereas Mg lowered the incidence of loin lesions (P = 0.01). Measurements of pH and temperature in the LM and biceps femoris 45 min postmortem revealed no differences among treatments, and no influence of treatments on LM pH, electrical conductivity, and water holding capacity was observed 48 h postmortem. Compared with the control loins, loins of pigs supplemented with vitamin C (Japanese color scale, L*, and a* value; P < 0.05) or vitamin E (Japanese color scale and a* value; P < 0.03) were redder and less pale, and the loin of vitamin E-supplemented pigs was more yellow (b* value; P = 0.04). Generally, Mg could lower loin damage, whereas vitamin C and vitamin E supplementation resulted in a color improvement of the loin.  相似文献   

5.
The objective of this experiment was to establish the validity of using plasma alpha-tocopherol values as an index of alpha-tocopherol status in sheep. alpha-tocopherol values were obtained for tissues and blood of 40 sheep given four different dietary intakes of dl-alpha-tocopheryl acetate. Group 1 sheep were given a basal diet containing 25 to 32 mg dl-alpha-tocopheryl acetate kg-1 while groups 2, 3 and 4, comprising 10 sheep each, received the basal diet plus 200, 400 and 600 mg dl-alpha-tocopheryl acetate per sheep, respectively. Blood samples were obtained at zero time and then twice weekly for eight weeks, at which time sheep were killed and organs retrieved for tissue alpha-tocopherol analysis. Tocopherol concentrations were higher in all tissues (P less than 0.001) of sheep fed the vitamin E supplemented diets than the basal diet. Vitamin E stored in the liver of sheep at the end of the experiment (eight weeks) showed a linear response to the level of vitamin E in the diet. Blood plasma vitamin E concentrations increased following vitamin E supplementation, but no direct relationship was found between vitamin E intake and plasma vitamin E content.  相似文献   

6.
试验旨在研究EM添加水平及方式对幼龄獭兔生长性能的影响。将108只50日龄断奶仔獭兔随机分成9组(A-I),每组4个重复,每个重复3只兔子,并置于同笼内饲养。其中,A组为对照组,饲喂基础日粮;B组在基础日粮中添加抗生素;C组则向饮水中添加2‰EM;D、E、F组分别饲喂在基础饲料制粒前添加1‰、2‰、3‰EM的基础日粮;G、H、I组分别饲喂在基础饲料制粒后添加1‰、2‰、3‰EM的基础日粮。试验预饲期5 d,正饲期30 d,每天早晚各饲喂一次。结果表明:制粒前添加2‰EM组(E组)与A、B、C组比较,能极显著提高獭兔生长性能,制粒后添加1‰EM组与制粒前添加2‰EM组差异不显著。建议饲料中EM添加量为:制粒前添加2‰,或制粒后添加1‰。  相似文献   

7.
The antidotal efficacy of aqueous garlic extract, methylene blue, and velenium (Vitamin E + sodium selenite) was compared against experimental nitrate intoxication in rabbits. Forty-two, albino rabbits of identical age, gender, and body weight were randomly divided into 7 groups (A to G) and subjected to experimental treatments for a period of 40 days. Rabbits of group A were offered only normal feed and served as negative control, while, rabbits of group B constituted the positive control group and received feed supplemented with sodium nitrate at 400 mg/kg body weight. Sodium nitrate-containing feed and intraperitoneal injection of 1% methylene blue solution at 2 mg/kg body weight were administered to group C. Rabbits of group D were given sodium nitrate-supplemented feed and aqueous garlic extract at 500 mg/kg body weight through oral route. Group E was treated with sodium nitrate-added feed, intraperitoneal injection of 1% methylene blue solution at 2 mg/kg body weight, and oral administration of garlic extract at 500 mg/kg. Velenium (25 mg of Vitamin E + 2.2 mg of sodium selenite per ml) was intraperitoneally injected at 1 ml/kg body weight to rabbits of group F along with the provision of sodium nitrate-supplemented feed. In addition to being fed with sodium nitrate-containing feed, group G obtained intraperitoneal injection of velenium at 1 ml/kg body weight and oral administration of garlic extract at 500 mg/kg body weight. The efficacy of antidotes was assessed on the basis of changes in blood nitrite level, biochemical profile, and gross pathological lesions manifested by the treated rabbits. The combination of methylene blue and garlic extract was highly effective in treating nitrate toxicity followed by methylene blue, garlic extract, and velenium, respectively. Whereas, the concurrent administration of garlic extract and velenium was least efficacious in terms of antidotal efficacy. In conclusion, aqueous garlic extract can be effectively used either alone or in combination with methylene blue when treating rabbits diagnosed with nitrate toxicity.  相似文献   

8.
本试验旨在研究饲粮中核黄素添加水平对生长獭兔肉品质、毛囊发育和免疫性能的影响。选择体重相近的3月龄獭兔160只,随机分为4组,每组40个重复,每个重复1只兔。各组分别饲喂在基础饲粮中添加0(对照)、3、6和12 mg/kg核黄素的饲粮。预试期7 d,正试期53 d。结果表明:与对照组相比,饲粮中添加6、12 mg/kg核黄素显著降低了獭兔肌肉的滴水损失(P0.05),饲粮中添加3、6、12 mg/kg核黄素显著提高了獭兔皮肤中总毛囊密度(P0.05),饲粮中添加3、6 mg/kg核黄素显著提高了獭兔皮肤中初级毛囊密度(P0.05),饲粮中添加6、12 mg/kg核黄素显著提高了獭兔皮肤中次级毛囊密度(P0.05),饲粮中添加3、6 mg/kg核黄素显著降低了獭兔皮肤中次级毛囊密度/初级毛囊密度(P0.05)。饲粮中核黄素添加水平对獭兔的胸腺重、胸腺指数及血清免疫球蛋白G、免疫球蛋白A、白细胞介素-2含量影响显著(P0.05),且均随着饲粮中核黄素添加水平的升高呈先增加后降低的趋势,并均在6 mg/kg添加组中达到最大值,显著高于对照组(P0.05)。由此可见,3~5月龄生长獭兔饲粮中核黄素适宜添加水平为6 mg/kg(实际测定饲粮中核黄素水平为8.35 mg/kg)。  相似文献   

9.
The present experiment tested a dietary supplementation with linseed oil and selenium to growing rabbits. The basal diet (B) contained 3% sunflower oil, while it was substituted with 3% linseed oil in the experimental feed (S). The selenium (Se) content of the two diets was 0.10 vs. 0.46 mg/kg. Rabbits were fed with B diet from the age of 18 days. One group was fed with the B diet until 11 weeks of age (group B), whereas the experimental groups were fed with S diet for 1, 2, 3 or 4 weeks (groups S1, S2, S3 and S4, respectively), before slaughtering (11 weeks of age). Live performance and carcass traits of rabbits, fatty acid (FA) profile and selenium content of their hind leg (HL) and Longissimus thoracis et lumborum (LTL) meat were considered in this study. In addition, the effect of two different cooking methods on the nutritional value of the enriched HL meat was also assessed. The tested dietary supplementation only minimally affected the live performance and carcass traits of rabbits. The S supplementation significantly reduced the Σ n‐6 FA and increased the Σ n‐3 FA of the HL meat and LTL meat, compared to the B diet (p < 0.001); thus, n‐6/n‐3 ratio was improved (p < 0.001). In addition, HL meat and LTL meat of S fed rabbits were significantly enriched in Se reaching a twofold increase in both meat cuts (p < 0.01). Therefore, the S supplementation improved the functional value of the rabbit meat. The heat treatment affected cooking loss, Se and vitamin E contents as well as the oxidative status of the HL meat (p < 0.001), with the different cooking methods providing different results. In addition, even if the beneficial C20:5 n‐3 and C22:6 n‐3 decreased with cooking, the n‐6/n‐3 ratio remained unaffected.  相似文献   

10.
A randomized blocked factorial experiment was conducted with 90 young pigs. From 4 to 11 weeks of age the pigs were kept in individual pens and fed a selenium supplemented basal diet consisting mostly of propionic acid treated barley, soybean meal and dried skim milk, and containing < 0.5 mg vitamin E per kg. The treatment factors during this period were 3 dietary levels of added vitamin E (nil, 10 and 30 mg/kg) and a 6 % supplement of fresh or oxidized fat (2/3 lard and 1/3 herring oil). From 11 weeks of age until slaughter at 90 kg the pigs received the vitamin E supplements but no fat or dried skim milk. The basal diet for this later experimental period was based on untreated dry barley. Blood samples collected during the period of investigation were examined for vitamin E and for resistance against erythrocyte lipid peroxidation (ELP) in order to evaluate the antioxidant status.Analysis of variance and Student’s t-test on least squares means showed the ELP to be influenced independently by the vitamin E supplement and, during the fat feeding period, by the quality of the fat supplement, with the highest peroxidation resistance (low ELP) in the groups fed fresh fat and a high level of vitamin E. Blood vitamin E level was only influenced — positively — by the vitamin E supplement although variations in the feed vitamin E level below 10–15 mg vitamin E per kg did not result in corresponding variations in measurable blood vitamin E concentrations. In the same low range of vitamin E in the feed there was a statistically significant difference in ELP values between the different vitamin E treatment groups. No clinical manifestations of selenium-vitamin E deficiency were observed in the pigs.The ELP and the plasma vitamin E levels observed would seem to suggest that a total of 15 mg vitamin E per kg barley-based feed will not always be sufficient for growing pigs.  相似文献   

11.
选用断奶伊拉肉兔200只,随机分成5组,每组40个重复,每个重复1只肉兔,分别饲喂添加0、0．3％、0．6％、0．9％和1．2％亚油酸（LA）的日粮。结果表明,在初始体质量无显著差异的情况下,日粮添加LA对平均日采食量、平均日增重和料重比影响不显著（P=0．9158,0．5747,0．9252）,对血清甘油三酯、高密度脂蛋白和极低密度脂蛋白影响不显著（P=0．5998,0．5717,0．6603）,对血清总胆固醇影响显著（P=0．0258）,0．9％和1．2％添加组显著低于0和0．6％添加组（P〈0．05）,对血清低密度脂蛋白影响极显著（P=0．0006）,0．9％和1．2％添加组显著低于0和0．6％添加组（P〈0．05）;免疫器官肝、脾指数和血清免疫球蛋白IgG、IgA、IgM受日粮LA水平影响不显著（P〉0．05）;日粮LA水平对肝脏乙酰辅酶A羧化酶（ACC）mRNA表达量影响不显著（P=0．7433）,对肉碱脂酰转移酶1（CPT1）mRNA表达量影响极显著（P=0．0034）,其中0．9％和1．2％添加组极显著高于对照组（P〈0．01）。日粮添加I。A对断奶至2月龄肉兔生产性能及免疫指标无显著影响,主要影响机体的脂质代谢。  相似文献   

12.
Effect of selenium on sheep lymphocyte responses to mitogens   总被引：1，自引：0，他引：1  
The effect of selenium (Se) on sheep lymphocyte response to mitogens was studied. In an indoor experiment lambs were fed a basal diet containing 0.13 mg Se kg-1, and supplemented with, respectively, 0.1 or 0.5 mg Se kg-1, either as sodium selenite or as selenomethionine. Enhancement of the proliferative response of lymphocytes to phytohaemagglutinin (PHA), pokeweed mitogen (PWM) and concanavalin A was found in lambs following selenium supplementation at the lower levels. The highest dietary selenium content, however, induced decreased mitogen response. Transient increases in lymphocyte response to PHA and PWM by ewes supplemented with selenium was demonstrated in one field study and a combined effect of selenium and vitamin E was seen in another. There was no stimulatory effect on the mitogen response of lymphocytes from sheep supplemented with dietary vitamin E alone.  相似文献   

13.
We investigated the effects of dietary copper and vitamin E in diets containing 6% rapeseed oil on the performance and the antioxidative and oxidative status of growing pigs. The 10 dietary treatments consisted of a basal diet (9 mg of vitamin E/kg feed, 15 mg of Cu/kg feed), the basal diet + 6% rapeseed oil (Diet 1; 18 mg of vitamin E/kg feed, 15 mg of Cu/kg feed), and Diet 1 plus supplements of vitamin E (0, 100, and 200 mg of dl-alpha-tocopheryl acetate/kg feed) and copper (0, 35, and 175 mg of Cu/ kg feed) in a 3 x 3 factorial arrangement of treatments. Eight or nine pigs were given ad libitum access to each diet from 25 to 100 kg of live weight. The inclusion of rapeseed oil tended (P < .10) to improve ADG and feed utilization. Compared with the addition of 35 mg of Cu/kg, the addition of 175 mg/kg improved growth rate and increased feed intake early in the experiment, but, over the total experiment, neither 35 nor 175 mg of Cu/kg affected performance. Compared with the addition of 100 mg of vitamin E/kg or no addition, the addition of 200 mg/kg reduced ADG over the total experiment (P = .05). The antioxidative and oxidative status of the pigs was evaluated in terms of blood and liver concentrations of antioxidants (alpha-tocopherol, ascorbic acid, vitamin A, superoxide dismutase, glutathione peroxidase), prooxidants (Cu), concentrations of lipids (triglycerides and cholesterol), fatty acid composition, thiobarbituric acid-reactive substances (TBARS), and clinical chemical (creatine kinase and glutamate-oxaloacetate-transaminase) and hematological variables that indicate the level of oxidative stress. There were no vitamin E deficiency signs or increased oxidative stress in pigs fed low dietary vitamin E levels, and no prooxidative effect of Cu was found. Increasing dietary levels of vitamin E increased the concentration of alpha-tocopherol in plasma and liver. Supplementation with Cu increased liver concentrations of Cu and alphatocopherol. The progression in liver TBARS was reduced by the addition of vitamin E and Cu. The addition of rapeseed oil changed the fatty acid composition of liver, increased alpha-tocopherol concentration in plasma and Cu concentration in liver, and reduced the rate of lipid oxidation in liver. In conclusion, even though the effects were minor, vitamin E, Cu, and rapeseed oil improved the antioxidative status of the live pigs.  相似文献   

14.
本文旨在探讨日粮铜水平对断奶至2月龄生长肉兔生产性能、血清指标的影响.选用新西兰断奶肉兔100只,随机分为5组,每组20个重复,每个重复1只兔.对照组饲喂基础日粮,试验组分别饲喂在基础日粮中以五水硫酸铜形式添加20、40、80和160 mg/kg铜的日粮,预试期7 d,正试期21 d.结果表明:日粮铜水平对生长肉兔平均日增重影响极显著(P=0.002 4),对料重比和平均日采食量无显著性影响(P>0.05);日粮铜水平对铜锌超氧化物歧化酶和血清铜蓝蛋白活性影响不显著(P>0.05),对血清总蛋白、球蛋白含量有显著影响(P=0.0403,P=0.0436),对白蛋白、白球比、尿素氮、总胆同醇含量无显著影响(P>0.05);日粮铜水平极显著影响血清胰岛素的含量(P=0.005 9),显著影响血清生长激素水平(P=0.024 8),对类胰岛素样生长因子-Ⅰ无显著影响(P>0.05).综合本试验结果,断奶至2月龄生长肉兔铜适宜添加水平为40～80 mg/kg(日粮实际含量为50～90 mg/kg).  相似文献   

15.
本试验旨在研究桑树茎叶饲料对肉兔生产性能和肉品质的影响。采用单因素试验设计,选择35日龄健康、体重接近的新西兰肉兔144只,随机分为4组(每组6个重复,每个重复6只),分别饲喂桑树茎叶饲料添加量为0(对照组)、8%、16%、24%的试验饲粮。预试期为7 d,正试期为42 d。结果显示:24%组平均日增重显著低于对照组(P0.05)、料重比显著高于对照组(P0.05);16%、24%组背肌和腿肌45 min时的红绿度(a*)值和24 h时的p H显著高于对照组(P0.05);16%、24%组背肌和腿肌的滴水损失率显著低于对照组(P0.05);16%、24%组背肌和腿肌中肌苷酸含量显著高于对照组(P0.05);16%、24%组背肌中亚麻酸、腿肌中棕榈酸和亚麻酸含量显著高于对照组(P0.05)。由此得出,饲粮中桑树茎叶饲料的添加量不超过16%时对肉兔的生产性能无显著影响,同时能提高肌肉中风味物质的含量,改善肉品质。  相似文献   

16.
This study was conducted to evaluate the effect of dietary vitamin E (VE) on broiler meat quality, especially focused on PSE (pale color, soft and exudative), under chronic heat stress (HS) conditions. Twenty‐eight‐day‐old female Ross broilers were kept in independent cages with a controlled temperature of 24°C (normal temperature: NT) or 30°C (high temperature: HT). The NT chickens were fed basal feed. The HT chickens were fed basal feed (HT) or VE (200 mg/kg) added feed (HT + E). Broilers were weighed and slaughtered at 38 days old. The breast muscle was removed immediately and then the samples were used for determination of meat color, pH, water holding capacity (WHC) and shear force value (SFV). Body weight gain and feed intake were significantly decreased in the HT and HT + E groups compared to the NT group. VE supplementation did not affect the growth performance. Chronic HS at 30°C for 10 days may cause deterioration of meat quality such as PSE. The effects of chronic HS on meat quality were most significant in the toughness of broiler breast meat. Supplementation of VE in broiler feed would be effective to prevent the extent of PSE on broiler meat by chronic HS.  相似文献   

17.
本试验旨在研究饲粮维生素E水平对43 ～ 63日龄黄羽肉鸡肉品质和抗氧化功能的影响.选用1 440只43日龄岭南黄羽肉公鸡,采用单因子随机分组试验设计,共设6个处理,每个处理6个重复,每个重复40只鸡.试验采用玉米淀粉-豆粕型基础饲粮,各处理饲粮营养水平除维生素E水平不同外,其他均相同.空白对照组饲喂未添加维生素E的基础饲粮,其余各处理饲粮中分别添加5、10、20、40、80 mg/kg维生素E.试验期21 d,试鸡地面平养,自由采食颗粒料和自由饮水.结果表明:1)饲粮中维生素E添加水平对试鸡生长性能和胴体品质无显著性影响(P＞0.05).2)胸肌肉色的L*、a*、b *值和肌肉嫩度也未受饲粮维生素E添加水平显著影响(P＞0.05).添加各水平维生素E均显著提高了宰后45 min胸肌pH(P ＜0.05),添加5、10、40、80 mg/kg维生素E均显著提高了宰后24 h胸肌pH(P ＜0.05).添加20、40 mg/kg维生素E显著降低了宰后45 min胸肌滴水损失,添加5、10、40、80 mg/kg维生素E显著降低了宰后48 h胸肌滴水损失(P＜0.05).3)饲粮中添加不同水平维生素E对试鸡血清中丙二醛(MDA)含量和总超氧化物歧化酶(T-SOD)活性无显著性影响(P＞0.05),添加10、20 mg/kg维生素E使试鸡血清中谷胱甘肽过氧化物酶(GSH-Px)活性分别比对照组提高了27.51％、30.57％(P＜0.05).添加各水平维生素E均使试鸡肝脏中GSH-Px活性显著提高(P＜0.05),添加20、40、80 mg/kg维生素E均显著降低了肝脏中MDA含量(P＜0.05),显著提高了肝脏中α-生育酚含量和肌肉中T-SOD活性(P＜0.05).以上试验结果提示,饲粮中添加维生素E可提高43～63日龄黄羽肉鸡机体抗氧化功能,改善肉品质,且添加20 mg/kg效果较好.  相似文献   

18.
刘奥强  梁凡  白建 《中国饲料》2021,1(7):63-67
为研究日粮中添加虾青素和维生素B2对蛋鸡生产性能的影响,试验选用45周龄产蛋率和体重相近、健康的海兰褐蛋鸡 600 只,随机分成 5 组,每组 3 个重复,每个重复 40 只鸡。对照组饲喂基础日粮,试验Ⅰ、Ⅱ、Ⅲ、Ⅳ组在基础日粮中分别添加0.25 %虾青素＋5.0 mg/kg维生素B2、0.25 %虾青素＋8.0 mg/kg维生素B2、0.25 %虾青素＋11.0 mg/kg维生素B2、0.25 %虾青素＋14.0 mg/kg维生素B2。预试期 7 d,各组均饲喂基础日粮。正试期 28 d,对照组饲喂基础日粮,试验组分别饲喂配方饲料,共35 d。结果表明：（1）试验Ⅱ、Ⅲ、Ⅳ组产蛋率分别较对照组提高2.89%、4.14%、5.01%（P < 0.05）。（2）试验Ⅰ、Ⅱ、Ⅲ、Ⅳ组平均蛋重分别较对照组增加1.69%、2.51%、3.38%、3.93%（P < 0.05）。（3）试验Ⅰ、Ⅱ、Ⅲ、Ⅳ组料蛋比分别较对照组降低2.22%、6.67%、11.85%、12.59%（P < 0.05）。综上,日粮中添加虾青素和维生素B2能提高蛋鸡的生产性能,且添加0.25%的虾青素和14.0 mg/kg维生素B2效果最佳。 [关键词] 虾青素|维生素B2|蛋鸡|生产性能  相似文献   

19.
李素英 《中国饲料》2022,1(4):41-44
文章旨在评估饲料添加不同水平百香果籽提取物对肉兔生长性能、肉品质及抗氧化指标的影响.试验将144只50?d平均体重为(668.38±1.55)g的肉兔随机分为3组,每组4个重复,每个重复12只肉兔.在为期7周的饲养期间,对照组肉兔饲喂基础日粮,T1和T2组肉兔分别饲喂基础日粮+100和200?mg/kg百香果籽提取物....  相似文献   

20.
1. The effect of high concentrations of vitamin E (alpha-tocopheryl acetate) fed during various age periods on the performance and the oxidative stability (thiobarbituric acid [TBA] values) of the drumstick meat of 7-week-old broiler chicks was determined. The basal diets (for the age periods 0 to 3, 3 to 6 and 6 to 7 weeks) contained 60 g soyabean oil and 24 mg vitamin E/kg. The following five treatments were evaluated: (1) the basal diets from 0 to 7 weeks of age (control); (2) vitamin E, 100 mg/kg diet from 0 to 7 weeks of age; (3) vitamin E, 150 mg/kg diet from 0 to 3 weeks of age; (4) vitamin E, 150 mg/kg diet from 0 to 3 weeks of age and 100 mg/kg diet from 6 to 7 weeks of age; (5) vitamin E, 100 mg/kg diet from 5 to 7 weeks of age. 2. Food intake, weight gain and food efficiency were not significantly (P greater than 0.05) affected by the vitamin E treatments. 3. Plasma alpha-tocopherol (AT) concentrations in treatments 2, 4 and 5 were similar, and markedly higher than those in treatments 1 and 3, while those of treatment 3 were significantly (P less than 0.001) higher than those of treatment 1. Plasma retinol concentrations were not significantly (P greater than 0.05) affected by the vitamin E treatments. 4. TBA values of the meat were very low and not significantly affected by the vitamin E treatments. However, after incubation the TBA values were highly significantly (P less than 0.01) negatively correlated with the amount of vitamin E consumed during the experiment. The stability of meat of birds fed the various combinations of vitamin E (treatments 3, 4 and 5) was significantly (P less than 0.05) higher than that of birds which did not receive additional vitamin E (treatment 1), but it was significantly (P less than 0.001) lower than that of birds which received vitamin E continuously (treatment 2). 5. It is concluded that a high concentration of vitamin E fed during 0 to 3 weeks of age may significantly improve AT status of the broiler chick up to 7 weeks of age.  相似文献   

设为首页 | 免责声明 | 关于勤云 | 加入收藏

Copyright©北京勤云科技发展有限公司  京ICP备09084417号