烟酸铬对肉鸡生产性能、胴体品质及和血液生化指标的影响

选择1日龄艾维菌商品肉鸡360羽，随机分成3组，每组3个重复，每个重复40羽，试验期6周，研究了在日粮中分别添加0，0．2，0．4mg/kg铬量的烟酸铬对肉鸡生产性能，胴体品质及血液生化指标的影响，结果表明：在0－6周龄的肉鸡日粮中添加不同水平的烟酸铬对肉鸡生产性能无显著影响（P＞0．05）。但添加烟酸铬可明显改善胴体品质，显著提高胸肌率（P＜0．05）、降低腹脂率（P＜0．01），对肝脂率、屠宰率，净膛率却无显著影响（P＜0．05），及甘油三酯的含量（P＜0．01），并显著提高血清中高密度脂蛋白－胆固醇的质量浓度（P＜0．05）。     

酵母培养物对蛋鸡生产性能及鸡蛋品质的影响

试验采用2 000只21周龄海兰褐蛋鸡,研究添加酵母培养物对蛋鸡生产性能和鸡蛋品质的影响,试验期6个月.结果表明:日粮中添加酵母培养物对蛋鸡平均蛋重和平均只耗料有增加的趋势,平均产蛋率试验组比对照组相比提高了3.88%(P＜0.05);料蛋比试验组与对照组相比降低了2.48%(P＜0.05).同时,改善了鸡蛋的品质,鸡蛋中蛋白质和有益维生素(VA、VE、VB2等)与对照组相比分别提高了0.66%和10.27%.脂肪的含量较对照组降低了0.54%(P＞0.05),胆固醇的含量较对照组降低了26.10%(P＜0.05).试验期每只鸡试验组比对照组多赢利1.20元.     

黄芪多糖对蛋鸡生产性能、生殖激素及 血液生理生化指标的影响

旨在研究饲粮中添加不同水平黄芪多糖(APS)对产蛋后期蛋鸡生产性能、生殖激素和血液生理生化指标的影响。随机选取27周龄健康、体质量相近、产蛋率相近的产蛋后期海兰褐壳蛋鸡360只,随机分为3个处理,每处理6个重复,每个重复20只。处理Ⅲ组为对照组,饲喂玉米—豆粕型基础饲粮,处理Ⅰ、Ⅱ组为试验组,分别饲喂在基础饲粮中添加200和100 mg/kg黄芪多糖的试验饲粮,预试期1周,试验期49 d。添加黄芪多糖可显著提高产蛋率,降低料重比,提高生产性能。黄芪多糖组显著或极显著地(P0.05或P0.01)提高了FSH、LH、E_2、IGF-Ⅰ、T_4、Pt含量;多糖高剂量组血清TG、AST、ALT显著或极显著低于对照组(P0.05或P0.01);GLU、HDL、ALP、Ca~(2+)和P含量显著或极显著高于对照组(P0.05或P0.01)。试验结果表明,黄芪多糖可提高产蛋后期母鸡的生殖激素水平,有利于改善产蛋后期母鸡的卵巢功能,促进卵泡发育与排卵,提高其产蛋性能;并具有一定的降血脂的作用。     

烟酸铬对肉鸡生产性能、胴体品质及血液生化指标的影响

选择 1日龄艾维茵商品肉鸡 36 0羽 ,随机分成 3组 ,每组 3个重复 ,每个重复 4 0羽 ,试验期为 6周。研究了在日粮中分别添加 0 ,0 .2 ,0 .4mg/kg铬量的烟酸铬对肉鸡生产性能、胴体品质及血液生化指标的影响。结果表明 :在 0～ 6周龄的肉鸡日粮中添加不同水平的烟酸铬对肉鸡生产性能无显著影响 (P >0 .0 5 )。但添加烟酸铬可明显改善胴体品质 ,显著提高胸肌率 (P <0 .0 5 )、降低腹脂率 (P <0 .0 1) ,对肝脂率、屠宰率、净膛率却无显著影响 (P >0 .0 5 )。当添加 0 .4mg/kg铬量的烟酸铬时 ,却能显著降低血清中葡萄糖 (P <0 .0 5 )、总胆固醇 (P <0 .0 5 )及甘油三酯的含量 (P<0 .0 1) ,并显著提高血清中高密度脂蛋白 -胆固醇的质量浓度 (P <0 .0 5 )。     

银杏叶合生元生物饲料对蛋鸡生产性能、蛋品质和部分血液生化指标的影响

随着添加银杏叶合生元生物饲料水平的提高,蛋鸡平均日采食量有所降低,Ⅳ组比对照组显著下降9.77%,Ⅱ、Ⅲ组与对照组比差异不显著.同时,Ⅲ组具有较好的蛋黄颜色和蛋黄率,胆固醇在蛋黄中的蓄积降低;并且总蛋白、球蛋白含量显著高于对照组,血清甘油三酯、总胆固醇含量降低显著,高密度脂蛋白胆固醇提高显著,添加0.4%银杏叶合生元生物饲料可满足蛋鸡的需要.     

饲料及饲养试验烟酸铬对肉鸡生产性能、胴体品质及血液生化指标的影响

选择1日龄艾维茵商品肉鸡360羽,随机分成3组,每组3个重复,每个重复40羽,试验期为6周.研究了在日粮中分别添加0,0.2,0.4 mg/kg铬量的烟酸铬对肉鸡生产性能、胴体品质及血液生化指标的影响.结果表明:在0～6周龄的肉鸡日粮中添加不同水平的烟酸铬对肉鸡生产性能无显著影响(P＞0.05).但添加烟酸铬可明显改善胴体品质,显著提高胸肌率(P＜0.05)、降低腹脂率(P＜0.01),对肝脂率、屠宰率、净膛率却无显著影响(P＞0.05).当添加0.4 mg/kg铬量的烟酸铬时, 却能显著降低血清中葡萄糖(P＜0.05)、总胆固醇(P＜0.05)及甘油三酯的含量(P＜0.01),并显著提高血清中高密度脂蛋白-胆固醇的质量浓度(P＜0.05).     

饲用大曲对肉兔生产性能和血液生化指标的影响

采用单因子试验设计,研究饲用大曲时肉兔生产性能的影响.结果表明:试验组肉兔腹泻率和死亡率降低;0.3%组平均日增重极显著高于对照组(P＜0.01),0.3%组平均日采食量极显著高于其余各组(P＜0.01),试验组料肉比均低于对照组(P＞0.05);对血液生化指标没有显著影响(P＞0.05);0.1%组、0.2%组经济效益较对照组分别提高3.88%、6.39%.饲用大曲在肉兔饲粮中适宜添加量为0.2%.     

不同品位沸石对蛋鸡生产性能影响的试验研究

选用380日龄伊莎褐蛋鸡2484羽，随机分为3组，每组设3个重复，研究两种不同品位沸石对蛋鸡生产性能和鸡蛋品质的影响，研究结果表明，蛋鸡日粮中添加高，低两种品位沸石使平均蛋重分别提高了1．53％（P＜0．05）和1．15％（P＞0．05），但料蛋比略有增加，高品位沸石还可提高蛋鸡产蛋率，降低破软蛋率，对死亡率则没有影响，沸石对鸡蛋品质亦有影响，它可改善蛋形指数和蛋黄色泽，使蛋壳变薄，但蛋壳强度增大，经济效益分析显示，蛋鸡日粮中添加高品位沸石使每1kg鸡蛋的生产成本降低0．04元，低品位沸石则使生产成本明显上升。     

复合微生态制剂对蛋鸡生产性能及鸡蛋品质的影响

研究复合微生态制剂对蛋鸡生产性能及鸡蛋品质的影响。结果表明:0.10%复合微生态制剂组蛋鸡平均产蛋率提高了4.79%(P<0.05),料蛋比降低了4.72%(P<0.05);鸡蛋的蛋壳厚度、蛋壳强度和哈氏单位,以0.10%复合微生态制剂组为最好,较对照组分别提高了4.88%、3.53%和3.32%,且差异均显著(P<0.05);但其他试验组较对照组间差异均不显著(P>0.05)。复合微生态制剂添加量以0.10%水平为佳。     

饲料中添加桑饲料对蛋鸡生产性能和鸡蛋品质的影响

本实验选用100只285日龄的农大矮小型蛋鸡,随机分为5组,各实验组在全价料的基础上分别添加0%、2.5%、5%、7.5%、10%的桑饲料颗粒料,实验期30d,进行蛋品质测定。结果表明饲喂桑饲料颗粒料能极显著的提高蛋黄颜色,提高哈夫单位,对蛋壳厚度、蛋形指数、蛋壳强度都有很好的改善作用。     

涂膜保鲜对不同蛋龄鸡蛋贮藏品质的影响

选用0,3,6,10 d蛋龄鸡蛋,经涂膜处理,对比不同蛋龄组贮藏品质的变化.结果表明：各组鸡蛋失重率差异不显著（P＞0.05）;蛋黄系数差异显著（P＜0.05）;蛋白系数和蛋白pH值差异极显著（P＜0.01）.贮存60,0 d蛋龄全部为新鲜蛋,失重率1.95%,蛋黄系数为0.32,蛋白系数为0.61,蛋白pH值仅为8.79;3 d蛋龄次鲜蛋占84%,散黄蛋占16%;6 d蛋龄次鲜蛋占50%,散黄蛋占50%;10 d蛋龄全部散黄.     

酵母培养物对蛋鹌鹑产蛋性能及产蛋品质的影响

研究酵母培养物对蛋用鹌鹑产蛋性能及产蛋品质的影响。对照组饲喂基础日粮,低、中和高水平酵母培养物组在基础日粮的基础上分别添加0．1％、0．3％和0．5％酵母培养物。结果表明：中、高水平酵母培养物组能显著提高蛋鹌鹑的产蛋率、蛋壳强度和哈夫单位,显著降低蛋鹌鹑的料蛋比、次品蛋率和死淘率。说明酵母培养物能提高产蛋性能和一定程度的提高产蛋品质,酵母培养物的适宜添加水平为0．3％     

低聚壳聚糖对蛋鸡脂类代谢及鸡蛋品质的影响

试验旨在研究低聚壳聚糖对蛋鸡脂类代谢及鸡蛋品质的影响。结果表明,低聚壳聚糖使第4周蛋鸡血清甘油三酯、低密度脂蛋白胆固醇和极低密度脂蛋白胆固醇含量分别降低了40.90%(P<0.05)、49.02%(P<0.01)和34.76%(P<0.05),脂蛋白脂肪酶、肝脂酶和总酯酶活性分别提高了10.38%(P>0.05)、42.89%(P<0.05)和30.24%(P>0.05);第8周脂蛋白代谢酶活性也有所提高。低聚壳聚糖对蛋鸡腹脂率、鸡蛋脂肪含量和鸡蛋品质无影响(P>0.05)。     

Effect of garlic powder on the performance,egg traits and blood parameters of laying hens

This study was conducted to investigate the effects of garlic powder on the performance, egg traits and blood parameters of laying hens. One hundred and sixty‐two SHSY‐type brown layers aged 21 weeks were chosen at random from a large flock. They were allocated to three dietary treatments. Each treatment comprised six replicates of nine layers in groups of three. The diets were supplemented with 0, 5 and 10 g kg^?1 garlic powder. The experimental period lasted 22 weeks. Garlic powder addition did not significantly affect body weight, egg production, feed consumption, feed efficiency, egg shell index, egg breaking strength, egg shell thickness, egg albumen index, egg yolk index, egg Haugh unit, egg yolk weight and serum protein concentration. Egg weight increased (P < 0.01) with garlic powder supplementation. There was a significant (P < 0.01) reduction in egg cholesterol concentration as mg g^?1 yolk when the dietary level of garlic powder was increased from 0 to 10 g kg^?1. Hen serum triglyceride (P < 0.05) and total cholesterol (P < 0.01) concentrations decreased with garlic powder supplementation. This study demonstrated that garlic powder addition increased egg weight and decreased egg yolk cholesterol concentration (mg g^?1 yolk) and serum triglyceride and cholesterol concentrations without adverse effects on performance and egg traits. Copyright © 2006 Society of Chemical Industry     

The effects of sources of supplemental fat on performance,egg quality,and fatty acid composition of egg yolk in laying hens

BACKGROUND: The objective of this study was to determine the effects of sources of supplemental fat on laying performance, egg quality, and fatty acid composition of egg yolk. RESULTS: Two hundreds Isa Brown layers were assigned randomly to be fed ad libitum a standard commercial layer feed (BD), basal diet plus 2% tallow (T), basal diet plus a mixture of 1% tallow and 1% flaxseed oil (MTFO), basal diet plus 2% sunflower oil (SO), or basal diet plus 2% flaxseed oil (FO), which were offered for 8 weeks. Each diet was given to five groups, each containing 10 hens. The feed efficiency and egg production were 2.78 and 53.51% for BD; 2.30 and 63.47% for T; 2.45 and 60.14% for MTFO; 2.29 and 64.30% for SO, and 2.62 and 61.18% for FO groups, respectively. Dietary fat supplementation affected the laying performance but had no significant effects on egg quality parameters. The fatty acid composition of egg yolk lipids were significantly affected by dietary fatty acid composition. The supplemental tallow increased palmitic fatty acid. The proportions of linoleic and arachidonic fatty acids in egg yolks for layers fed the SO diet were higher than in the BD group and those on diets containing other fats. Concentrations of oleic and omega‐3 fatty acids were the highest in layers fed the FO diet during the laying period. CONCLUSION: The results indicated that dietary animal and plant fats changed the fatty acid composition of egg yolk. Copyright © 2008 Society of Chemical Industry     

Effects of dietary taurine on egg production,egg quality and cholesterol levels in Japanese quail

BACKGROUND: Taurine is a semi‐essential amino acid and has many biological properties. The objective of this study was to determine the effect of dietary supplementation with taurine on egg production, egg quality, and cholesterol level in serum and egg yolk of quails. A total of 108 quails aged 6 weeks were randomly allocated to three dietary treatments. Each treatment consisted of four replicates of nine quails. The diets were supplemented with 0, 100, and 500 mg kg^?1 of taurine for 8 weeks. RESULTS: Dietary 500 mg kg^?1 taurine significantly affected egg production rate and feed conversion ratio, but had no significant effects on body weight gain, feed consumption, or egg weight. Dietary taurine had no significant effect on egg quality parameters studied. Serum triglyceride concentration was reduced significantly with supplementation of taurine at 100 and 500 mg kg^?1. Egg yolk cholesterol content was reduced significantly, and the contents of serum taurine and egg yolk taurine were increased significantly with taurine supplementation at 500 mg kg^?1. CONCLUSION: Results of the present study indicated that adding 500 mg kg^?1 taurine reduced yolk cholesterol concentration and increased yolk taurine content without adverse effects on performance and egg quality of laying quails. Copyright © 2010 Society of Chemical Industry