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1.
试验旨在研究日粮中添加亚麻籽油对蛋鸡生产性能、蛋品质、蛋黄脂肪酸组成及鸡蛋风味的影响。选取40周龄海兰灰商品代蛋鸡288只,随机分为4组,每组8个重复,每个重复9只鸡。设计分别添加0、0.5%、1.0%和3.0%亚麻籽油的4种等能等氮日粮。预试期1周,正试期4周。结果显示:(1)日粮中添加0.5%、1.0%、3.0%亚麻籽油对产蛋鸡生产性能、蛋品质均无显著影响(P0.05);(2)亚麻籽油可显著提高蛋黄中α-亚麻酸(ALA)、二十碳五烯酸(EPA)、二十二碳六烯酸(DHA)及总n-3多不饱和脂肪酸(PUFA)含量,且其随亚麻籽油添加水平增加呈线性和二次变化(P0.05);(3)3.0%亚麻籽油组显著降低了蛋黄气味及滋味评分,同时显著增强了蛋黄鱼腥气味及滋味评分(P0.05),而蛋黄总体接受度显著降低(P0.05),且其均随亚麻籽油添加水平增加呈线性和二次变化(P0.05);(4)鸡蛋蛋黄总n-3PUFA含量与鱼腥气味、滋味间具有显著相关性(P0.05),且鸡蛋蛋黄接受度随n-3PUFA含量增加而降低(R2=0.801)。综上所述,日粮添加亚麻籽油可提高蛋黄总n-3PUFA含量,但添加量过高时对鸡蛋风味产生不良影响导致总体接受度下降;蛋黄总n-3PUFA含量不高于21.26mg/g时,可接受度评分大于5分,鸡蛋感官品质在可接受范围内。  相似文献   

2.
将135只26周龄海兰褐商品蛋鸡随机分为3个处理,分别饲以3种日粮:n-3多不饱和脂肪酸日粮(PUFA)、n-6PUFA日粮和普通日粮研究PUFA类型对蛋鸡生产性能和蛋黄脂肪酸富集的影响。试验结果表明:n-3PUFA日粮使产蛋率和饲料效率显著(P<0.05)降低;n-6PUFA日粮组死亡率与其他组相比极显著(P<0.01)上升。两种PUFA日粮使蛋黄n-3PUFA及n-6PUFA含量显著(P<0.05)改变。结果表明:PUFA日粮能显著改变蛋黄PUFA的组成,可生产出n-3PUFA含量达到585mg/枚和n-6PUFA含量达到1595mg/枚的鸡蛋;但试验发现日粮中添加过多的亚麻籽和葵籽对蛋鸡生产性能有不良的影响(P<0.05)。  相似文献   

3.
本试验旨在探讨日粮中亚麻籽添加水平和添加时间对蛋中n-3多不饱和脂肪酸的富集以及蛋品质的影响。选取46周龄京粉1号蛋鸡1 344只,随机分为4个组,每组6个重复,每个重复56只。4个处理组日粮中亚麻籽的添加水平分别为0%(对照组)、5%、10%、15%。试验期60 d。试验第10、20、30、45、60天测定蛋中α-亚麻酸、二十碳五烯酸(EPA)、二十二碳六烯酸(DHA)等n-3多不饱和脂肪酸(n-3PUFA)含量。第30、60天测定蛋壳强度、蛋黄色度和哈氏单位。结果表明:亚麻籽的添加水平、时间以及二者互作均对蛋中n-3PUFA的富集产生显著影响,蛋中n-3PUFA含量随着亚麻籽添加水平和添加时间增加呈上升趋势,随后达到稳定;5%亚麻籽组中鸡蛋DHA含量最高,其他脂肪酸含量以15%亚麻籽组最高;蛋中EPA含量在20 d达到最高,其他脂肪酸在30 d达到最高;蛋黄色度随着日粮中亚麻籽添加水平升高而显著降低,其他蛋品质指标无显著变化。由此表明,给蛋鸡饲喂含15%亚麻籽日粮30 d以上,可获得理想n-3PUFA富集鸡蛋,但要保证日粮色素水平稳定。  相似文献   

4.
为研究蛋鸡日粮中添加亚麻籽对蛋黄中多不饱和脂肪酸富集的影响,根据相关标准,采用人工和系统的检索方法检索相关文章,并用荟萃分析(Meta-analysis)的方法分析计算合并标准均数差(SMD)及95%置信区间(95%CI)。通过检索与筛选,共有8篇文章21个试验被纳入,共包括1390个研究对象。Meta分析的结果显示:蛋黄中亚麻酸(ALA)、二十二碳六烯酸(DHA)、亚油酸(LA)、总n-3多不饱和脂肪酸(n-3PUFA)、花生四烯酸(AA)、总n-6多不饱和脂肪酸(n-6PUFA)、n-6PUFA/n-3PUFA的SMD和95%CI分别为17.51(13.34,21.69)、5.39(4.22,6.55)、0.42(-0.39,1.23)、8.86(7.59,10.14)、-1.62(-2.54,-0.70)、-0.44(-0.97,0.08)和-5.22(-6.62,-3.82);混合线性模型的结果显示:DHA和n-3PUFA的异质性来源为亚麻籽添加剂量,蛋黄中ALA、AA、LA和n-6PUFA/n-3PUFA的异质性来源为亚麻籽的添加剂量和蛋鸡产蛋周龄。由分析结果可知,蛋鸡日粮中添加亚麻籽能显著提高蛋黄中的ALA、DHA及n-3PUFA的含量并能显著降低AA和n-6PUFA/n-3PUFA的水平,且富集水平受到亚麻籽添加剂量和蛋鸡产蛋周龄的影响。  相似文献   

5.
本试验旨在比较饲粮中添加微藻和亚麻籽对蛋鸡生产性能、蛋品质、蛋黄脂肪酸组成的影响及蛋黄ω-3多不饱和脂肪酸(PUFA)沉积规律。选取37周龄健康、产蛋率和体形相近的罗曼蛋鸡216只,随机分为3个组,每组6个重复,每重复12只。对照组饲喂玉米-豆粕型基础饲粮,2个试验组分别饲喂基础饲粮中添加8%微藻(微藻组)和8%亚麻籽(亚麻籽组)的饲粮。试验期4周。结果表明:1)与对照组相比,微藻组和亚麻籽组的产蛋率、平均日采食量、平均蛋重和料蛋比均无显著差异(P0.05)。2)与对照组相比,微藻组和亚麻籽组的蛋重、蛋黄重、蛋黄比例、蛋白重、蛋白比例、蛋白高度和哈氏单位均无显著差异(P0.05);但贮存时间延长可极显著降低哈氏单位和蛋白高度(P0.01),且微藻组和亚麻籽组的降低程度高于对照组;微藻组蛋黄颜色评分极显著高于对照组和亚麻籽组(P0.01)。3)与对照组相比,微藻组和亚麻籽组蛋黄ω-3 PUFA含量均极显著提高(P0.01),ω-6 PUFA含量和ω-6/ω-3极显著降低(P0.01)。4)微藻组和亚麻籽组蛋黄中二十二碳六烯酸(DHA)、ω-3PUFA含量均第13天富集饱和,后出现缓慢降低趋势。由此可见,饲粮中添加微藻和亚麻籽均可生产富含ω-3 PUFA鸡蛋,最佳时间为第13天后,并且对蛋鸡生产性能和蛋品质无不良影响,但富含ω-3PUFA鸡蛋不易贮存。  相似文献   

6.
本试验旨在研究2%裂殖壶菌粉蛋鸡饲粮中添加胆碱和磷脂对蛋鸡生产性能、蛋品质和蛋黄脂肪酸组成的影响。选用360只28周龄的海兰灰产蛋鸡,随机分为5个处理,每个处理6个重复,每个重复12只鸡。基础饲粮含有2%裂殖壶菌粉(二十二碳六烯酸(DHA),137.09mg/g)。对照组饲喂基础饲粮,其他4个处理组在基础饲粮上分别添加1,000mg/kg胆碱(CHO)、1,000mg/kg乙醇胺(MEA)、1,000mg/kg溶血磷脂酰胆碱(LPC)和500mg/kgLPC+500mg/kgMEA(LPC+MEA)。所有饲粮等能(代谢能,11.15MJ/kg)等氮(粗蛋白,16.60%)。试验期28天。结果表明:各处理饲粮对蛋鸡的生产性能和蛋品质无显著影响(P0.05)。饲喂28天后,饲粮添加LPC显著降低了蛋黄单不饱和脂肪酸(MUFA)的含量(P0.01),提高了多不饱和脂肪酸(PUFA)含量(P0.05)。与对照组相比,饲粮添加LPC有增加蛋黄n-6PUFA含量的趋势(P=0.07);饲粮添加CHO和LPC显著提高了蛋黄n-3PUFA和DHA含量,降低n-6PUFA与n-3PUFA的比例(n-6/n-3)(P0.01)。饲喂14天后,蛋黄DHA含量达到最大值,且蛋黄DHA含量在CHO和LPC组高于其他各组(P0.05)。结论:2%裂殖壶菌粉蛋鸡饲粮中添加胆碱,饲喂周期达到14天后,可增加蛋黄n-3PUFA和DHA含量,且对蛋鸡的生产性能、蛋品质和鸡蛋组分无不良影响。  相似文献   

7.
本试验旨在研究饲粮中添加亚麻籽和鱼油对蛋鸡蛋黄n-3多不饱和脂肪酸含量、肝脏脂肪酸组成及其合成代谢基因表达的影响。选择28周龄海兰褐壳蛋鸡96只,随机分为4组,每组24只。对照组饲喂基础饲粮,试验组分别在基础饲粮中添加10%亚麻籽、10%亚麻籽+5%鱼油和5%鱼油。饲养21 d后连续收集7 d鸡蛋,然后每组随机选取4只鸡屠宰取样。结果表明,与对照组相比:1)添加亚麻籽和鱼油均显著增加蛋黄中n-3多不饱和脂肪酸含量(P0.05),其中单独添加鱼油的蛋黄中二十二碳六烯酸(DHA)和二十碳五烯酸含量最高;2)试验组肝脏单不饱和脂肪酸比例均显著降低(P0.05),肝脏n-3多不饱和脂肪酸比例均显著增加(P0.05);3)单独添加鱼油显著降低肝脏脂肪酸延长酶1、脂肪酸延长酶2和去饱和酶(脂肪酸去饱和酶1、脂肪酸去饱和酶2和硬脂酰辅酶A去饱和酶1)基因表达水平(P0.05)。由此可见,蛋鸡饲粮中单独添加亚麻籽或鱼油可以富集蛋黄n-3多不饱和脂肪酸沉积;添加亚麻籽促进肝脏α-亚麻酸转化生成DHA过程,表现为上调脂肪酸延长酶和去饱和酶基因表达,添加鱼油显示相反结果。  相似文献   

8.
试验旨在研究饲粮中添加微藻二十二碳六烯酸(DHA)和α-亚麻酸(ALA)对蛋黄脂肪酸成分以及蛋黄胆固醇、甘油三酯的影响。方法:选取300日龄海兰褐蛋鸡576只,随机分为3个处理,每个处理3个重复,每重复64只鸡。对照组饲喂基础饲粮,试验组添加0.2%DHA和0.3%ALA,试验期42 d。结果表明:添加DHA和ALA的鸡蛋,多不饱和脂肪酸(PUFA)的含量均有显著提高(P0.05);添加DHA比添加ALA更能显著增加蛋黄中的二十二碳六烯酸(P0.05),更具降低胆固醇等作用。2个添加组均能显著增加n-3多不饱和脂肪酸(n-3PUFA)的含量(P0.05),并且添加DHA或ALA均能降低n-6/n-3的比值;添加DHA和ALA都可以显著降低蛋黄中的总胆固醇(TC)和总三酰甘油(TG)值(P0.05);添加DHA能更有效的降低血清TG。  相似文献   

9.
本试验旨在研究饲粮添加亚麻籽对生长育肥猪生长性能、胴体性状、肉质和脂肪酸组成的影响。试验选用(52.31±2.28) kg的生长猪72头,按体重随机分为3组,每组4个重复,每个重复6头猪。对照组饲喂基础饲粮,试验组分别饲喂在基础饲粮中添加5%和10%亚麻籽的饲粮。试验分2个阶段(50~80 kg和81~110 kg),每个阶段结束时对猪进行称重,试验结束后每栏选2头接近平均体重猪进行麻醉屠宰。结果表明:1)与对照组相比,饲粮添加5%和10%亚麻籽显著降低了生长育肥猪50~80 kg阶段平均日采食量、料重比及50~110 kg阶段料重比(P<0.05),并且10%添加量还显著提高了50~80 kg阶段平均日增重(P<0.05)。2)饲粮添加亚麻籽能显著增加生长育肥猪眼肌面积(P<0.05),但对胴体长、屠宰率、平均背膘厚等胴体性状无显著影响(P>0.05)。3)饲粮添加5%和10%亚麻籽能显著降低生长育肥猪背最长肌n-6/n-3多不饱和脂肪酸(PUFA)值(P<0.05),显著提高α-亚麻酸、二十二碳烯酸、二十二碳二烯酸含量及PUFA总含量(P<0.05),且当添加量达到10%时,还能显著提高背最长肌中油酸和亚油酸含量(P<0.05)。结果提示,亚麻籽能一定程度提高生长育肥猪生长性能,增加背最长肌中n-3PUFA含量,降低n-6/n-3 PUFA值,且对胴体性状及肉质无负面影响。  相似文献   

10.
试验旨在研究杜仲叶对海兰褐蛋鸡生产性能、蛋品质、血清生化指标及蛋黄胆固醇的影响。选取720只327日龄海兰褐蛋鸡随机分为4组,每组5个重复,每个重复36只蛋鸡。对照组蛋鸡饲喂基础日粮,试验组分别在基础日粮中添加0.5%、1.0%、1.5%杜仲叶粉。预试期1 w,正式试验期7 w。结果显示,1.0%组、1.5%组蛋鸡的产蛋率均显著高于对照组（P<0.05）。1.0%组鸡蛋的蛋黄颜色显著高于对照组（P<0.05）。1.0%组、1.5%组蛋鸡血清总胆固醇（TC）含量均显著低于对照组（P<0.05）。各试验组蛋鸡血清总抗氧化能力、过氧化氢酶活性显著高于对照组（P<0.05）。1.0%组、1.5%组蛋黄胆固醇含量均显著低于对照组（P<0.05）。研究表明,日粮中添加杜仲叶粉可以改善蛋鸡的产蛋率和蛋品质,降低血清总胆固醇和蛋黄胆固醇含量,提高抗氧化能力,杜仲叶粉推荐添加量为1.0%。  相似文献   

11.
本试验旨在研究饲粮添加胆碱与裂殖壶菌油(Schizochytrium oil,SO)对鸡蛋卵黄脂质及二十二碳六烯酸(DHA)富集的影响。选取26周龄京红蛋鸡288只,分4组(每组6个重复,每重复12只鸡)。采用2×2因子试验设计,饲粮添加胆碱(500和1 000 mg/kg)和SO(0和0.5%)为2个主效应,共配制4种等氮等能饲粮。预试期1周,正试期8周。结果表明:1)试验期内,各组生产性能和蛋品质均无显著差异(P0.05)。2)各组卵黄中干物质、粗脂肪、胆固醇及甘油三酯含量均无显著差异(P0.05)。1 000 mg/kg胆碱组卵黄总磷脂含量显著高于500 mg/kg胆碱组(P0.05)。胆碱和SO对卵黄总磷脂含量有显著交互作用(P=0.04),1 000 mg/kg胆碱+0.5%SO组卵黄总磷脂含量最高。3)0.5%SO显著提高卵黄n-3多不饱和脂肪酸(PUFA)和DHA含量(P0.05),显著降低n-6 PUFA含量及n-6 PUFA/n-3 PUFA值(P0.05)。胆碱和SO对卵黄中n-3 PUFA(P0.001)、n-6 PUFA(P=0.01)及DHA(P0.001)含量和n-6 PUFA/n-3 PUFA值(P=0.01)有显著交互作用,1 000 mg/kg胆碱+0.5%SO组卵黄中n-3PUFA和DHA含量显著高于其他组(P0.05),且n-6 PUFA含量及n-6 PUFA/n-3 PUFA值显著低于其他组(P0.05)。综上,本试验条件下,饲粮中1 000 mg/kg胆碱和0.5%SO联合添加可促进卵黄DHA富集,且对蛋鸡生产性能和蛋品质无显著影响。  相似文献   

12.
The effect of karaya saponin supplementation on the serum and egg yolk cholesterol and fatty acid composition in egg yolk were investigated in Japanese quails. A total of 80 Japanese quails aged 5 weeks were equally divided into four groups of 20. Four levels (0, 25, 50 and 75 mg/kg feed) of karaya saponin were included in the basal diet and experiment was lasted for 6 weeks. The cholesterol fractions in the egg yolk and serum were measured by enzymatic assay, and the fatty acid composition in egg yolk was determined by gas chromatography. The results revealed that the supplementation of 75 mg/kg karaya saponin significantly reduced (p < 0.05) cholesterol and triglycerides concentration in serum and egg yolk. High-density lipoprotein-cholesterol was increased, low-density lipoprotein-cholesterol and the atherogenic index were decreased (p < 0.05) by the dietary supplementations. Hepatic cholesterol was reduced (p < 0.05) by the 25 mg/kg karaya saponin. A higher degree of yolk colour was improved (p < 0.05) when 75 mg/kg saponin was supplemented in the diet. The concentration of polyunsaturated fatty acids (PUFA) in egg yolk was increased (p < 0.05) in a dose-dependent manner in quails fed the supplemented diet than the control diet. The ratio of PUFA to saturated fatty acids in egg yolk was improved (p < 0.05) by 75 mg/kg feed karaya saponin-supplemented diet. Therefore, the dietary supplementation of 75 mg/kg karaya saponin may be a feasible means of producing quail eggs with lower cholesterol and higher PUFA content for health conscious consumers.  相似文献   

13.
Effects of defatted microalgae (DFA) on fatty acid composition of eggs and tissues of hens have not been well studied. This experiment was to determine how low concentrations of supplemental DFA in the presence or absence of flaxseed oil (FO) altered fatty acid profiles of egg yolk, liver, adipose tissue, and plasma of layers. A total of 60 Shaver Leghorn layer hens (individually caged, 20-wk old) were allotted into 6 groups (n = 10) and fed a corn/soybean meal basal diet containing 0, 3, or 5% DFA and 0 (1.5% corn oil, CO) or 1.5% FO for 6 wk. BW, ADFI, egg production rate, and egg component weights were not affected by any of the dietary treatments at various time points, but egg yolk color was changed (P < 0.05) with increasing concentrations of DFA. The concentration of n-3 fatty acids in egg yolk and plasma were elevated by FO up to 9-fold (P < 0.05) starting at wk 1 or 2, and 39 to 83% (P < 0.05) by DFA. Supplemental DFA improved (P < 0.05) n-6/n-3 fatty acid ratios in egg yolk and plasma from 13 to 23 and 7 to 13, respectively, only in hens fed diets without FO. Fatty acid profiles of liver and adipose tissue (at wk 6) displayed responses to supplemental DFA and FO similar to those of egg yolk or plasma. In conclusion, supplemental 3 or 5% DFA caused moderate enrichments of n-3 fatty acids and decreased the n6/n3 fatty acid ratios of egg yolk and tissues in hens fed diets without FO.  相似文献   

14.
Although dietary n-3 fatty acids have been extensively studied in poultry, they have not yet been prospectively investigated in psittacines, despite potential benefits for preventing and treating atherosclerosis, osteoarthritis, and other chronic disease processes. The objectives of this study were to investigate the incorporation of dietary n-3 fatty acids into red blood cells (RBC) and to determine the effects of supplementation of psittacine diets with fish or flax oil on plasma lipids and lipoproteins in the cockatiel. Adult cockatiels were fed a custom-formulated diet containing either 4% (wt/wt, as-fed) beef tallow (CON), 3% fish oil + 1% tallow (FSH), or 3.5% flax oil + 0.5% tallow (FLX; n = 20 per diet group). Baseline measurements were obtained for RBC fatty acid composition, triacylglycerides (TAG), and cholesterol. After 8 to 13 wk on the study diets, plasma chemistry profiles, lipoprotein density profiles, and RBC fatty acid composition were determined. At 8 wk, total plasma cholesterol was least in FSH birds (P < 0.05) and TAG concentrations were less in FSH birds than FLX birds (P < 0.05). Total n-3 fatty acids, docosahexaenoic acid, docosapentaenoic acid, and eicosapentaenoic acid were markedly greater in the RBC of FSH birds than FLX or CON birds (P < 0.05). Alpha linolenic acid was greatest in FLX (P < 0.05). Initial and final BW, and nonlipid plasma chemistry values did not differ among diet groups. No adverse effects of dietary supplementation of cockatiels with 3.5% flax oil or 3% fish oil were observed during the 13-wk feeding period. Although fish and flax oils provided similar total n-3 PUFA to the diets, fish oil caused greater reductions in cholesterol and TAG, and greater total RBC n-3 incorporation. Thus, dietary modification of psittacine diets with long chain n-3 PUFA from fish oil appears safe and may be beneficial to these long-lived companion birds.  相似文献   

15.
ω-3PUFA在蛋黄中的富集效应及对蛋品质的影响   总被引：1，自引：0，他引：1  
试验共设4个组,对照组含3%菜油,试验组分别含2%菜油+1%鱼油、1%菜油+2%鱼油和3%鱼油,研究日粮不同水平ω-3PUFA在蛋黄中的富集效应及对蛋品质的影响。各试验组ω-3PUFA在蛋黄中的沉积量随鱼油添加时间延长而显著提高(P<0.01),第8周ALA、EPA和DHA沉积量分别达到2.96%、3.2%和2.9%,以2%鱼油添加组升高幅度最大。蛋黄中TC含量下降,第8周各组蛋黄中胆固醇含量比第2周分别降低2.30%、4.38%、1.24%和1.88%,同期各组内差异不显著。各试验组蛋黄TG含量变化不大,MDA含量均不同程度有所提高。此外,添加鱼油提高了蛋壳强度和蛋壳厚度,蛋重下降。  相似文献   

16.
1. Two experiments were carried out to investigate the effect of dietary flaxseed, flax oil and n-3 fatty acid supplementation (Dry n-3) on hepatic fat content, plasma triglycerides, hepatic haemorrhage score, egg production, food intake and body weight in an inbred line of Single Comb White Leghorns (UCD-003) predisposed to fatty liver haemorrhagic syndrome (FLHS) and normal SCWL hens. 2. Feeding diets containing 100 g/kg ground flaxseed, 40 g/kg flax oil, or 100 g/kg Dry n-3 reduced body weight and significantly reduced hepatic fat content compared to feeding the control diet with animal and vegetable oil as a fat source. 3. Hepatic malondialdehyde, an indicator of lipid peroxidation within the liver, was not significantly affected by dietary treatment. 4. Normal SCWL hens tended to have higher egg production, greater body weight, greater food intake and higher blood triglyceride concentrations than UCD-003 hens, although the strain effects were not significant. Liver weight as a percent of body weight was significantly lower in normal SCWL hens. Treatments by strain interactions were not found. 5. The result suggested that dietary flaxseed, flax oil and Dry n-3 decrease hepatic fat content and reduce body weight, 2 of the predisposing factors believed to contribute to FLHS onset. However, haemorrhages were still apparent in both strains regardless of treatment, indicating that other unknown underlying mechanisms may also be responsible for FLHS.  相似文献   

17.
The effect of n-3 fatty acid-enriched diets (in the form of 0.5% linseed oil with either 1.5% sunflower oil or 1.5% olive oil) and alpha-tocopheryl acetate supplementation (200 mg/kg feed) on lipid oxidation (thiobarbituric acid-reactive substances, TBARS) and cholesterol oxide products (COPS) in cooked pork was investigated. Longissimus muscle was studied. Meat from pigs fed 0.5% linseed oil-enriched diets had a higher proportion of n-3 fatty acid than meat from pigs in other dietary groups in neutral (P < 0.0001) and polar lipids (P < 0.0001), and a 20% reduction in the n-6:n-3 ratio was observed. Alpha-tocopheryl acetate supplementation increased (P < 0.05) monounsaturated fatty acids in polar lipids and increased (P = 0.0001) alpha-tocopherol levels in muscle. Alpha-tocopherol concentration in muscle was affected by dietary fat (P < 0.05). Groups receiving diets enriched with sunflower oil had significantly higher alpha-tocopherol levels (P < 0.05) in muscle than those groups receiving olive oil-enriched diets. Numbers of TBARS were significantly (P < 0.05) lower in the group fed supplemental olive oil than in those fed sunflower oil. Dietary linseed oil increased (P < 0.05) lipid oxidation principally at the initial period of storage in cooked pork. Overall, dietary alpha-tocopheryl acetate supplementation significantly increased (P < 0.001) lipid stability and decreased (P < 0.05) total COP production across the dietary groups. Alpha-tocopherol was a more effective antioxidant for decreasing TBARS values in cooked meat when adding sunflower oil to the diets instead of olive oil.  相似文献   

18.
This study was conducted to investigate the effects of feeding fermented fish (FF) to layers on laying performance, and polyunsaturated fatty acid and cholesterol levels in eggs and plasma. A total of 96, 13-week-old Babcock B380 pullets were used in this study. They were randomly assigned to four numerically equal groups with eight replicates per treatment, three birds per replicate. All the birds were housed in individual cages. The dietary treatments were: Control diet, without FF; FF3 diet containing 3% (w/w) FF, FF6 diet containing 6% (w/w) FF and FF9 diet containing 9% (w/w) FF. The study was carried out for 16 weeks inclusive of two weeks of adjustment. Weekly feed intake and egg production were recorded. Blood plasma cholesterol and fatty acid profiles were assayed at the end of the experiment. FF did not enhance ( P  > 0.05) egg mass but ( P  < 0.05) decreased egg weight slightly. However, egg yolk cholesterol and plasma cholesterol concentrations were reduced ( P  < 0.05) by FF. The n-6:n-3 fatty acids ratio in the egg yolk (Control = 7.9, FF9 = 6.2) and plasma (Control = 10.6, FF9 = 6.2) were decreased by feeding FF. Moreover, FF was able to increase ( P  < 0.05) the docosahexaenoic acid (DHA) concentrations in egg yolk and plasma. In conclusion, this study demonstrated that FF increased DHA and reduced egg yolk cholesterol in poultry eggs.  相似文献   

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